JP2018075629A - Method of high-chromium cast iron cast-coating for cermet tic tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a cast-iron cast-coating structure that realizes brazing-joining of a cermet TiC tip and high-chromium cast iron through the Kirkendall effect without removing a vacuum-coated thin film, in view of the fact that although a wax material is coated over a surface of a cermet tip in order to join a cermet TiC tip and high-chromium cast iron, a complicated process is conventionally necessitated for this purpose including removing in advance a vacuum-coated thin film from a cermet TiC tip surface and also re-plating wax or spray coating wax after the removal of the thin film.SOLUTION: In a method of high-chromium cast iron cast-coating for a cermet TiC tip, a cermet TiC tip surface-coated with a vacuum-coated thin film is cleaned at a surface by degreasing acid pickling and then subjected to electroless copper plating or electroless Ni plating and further to Ni-B electroplating, then immersed in a liquid flux including China clay and produced by resolving all of potassium fluoride, acidic potassium fluoride, boronic acid, borax and boronic potassium fluoride in a solvent such as alcohol so as to cause deposition, then heated to form a baked film of the plating and a flux and complete the surface treatment, and thereafter cast with high-chromium cast iron in a die.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a Hi-Cr cast iron cast structure and a cermet TiC chip for a Hi-Cr cast iron structure.

Cermet TiC chips as well as carbide chips (WC) for machining are also collected by processing manufacturers, but about half are cermet chips, but 100% are disposed of because the cost of regeneration is higher. .
Carbide tips are mainly reused because they are mainly made of expensive W, Co, and Ni. However, even if the cermet TiC chip is disassembled, it is still Ti and C, so the heat and wear resistance is higher than that of carbide and the hardness is also very high. Very expensive. Because there are a lot on the earth, it is cheaper and has less merit for reproduction.
It is not utilized because of the disposal cost of chip makers.

  There are various methods of using a combination of cemented carbide in Hi-Cr, ceramic bonding to Hi-Cr casting, or brazing or stat stop, but most of them are extension of wear countermeasures, and construction methods are also Although there are various methods, all of these construction processes are complicated and complicated and are all expensive. The use of cermet TiC chips is a material close to zero.

The biggest drawback was that the cermet TiC chip cast was weak against the shrinkage stress when the Hi-Cr cast iron was cooled and hardened. This is because the cast cermet TiC chip is broken apart and has a low specific gravity, so it breaks and rises.
If the cermet TiC chip can be cast in a square shape as it is necessary for Hi-Cr cast iron as a cutting edge chip, it is strong against high temperature oxidation that can be said to be a weak point of carbide high gold, It is the most suitable material for demon teeth and dentures of sintering equipment mainly for high temperature wear.

It is impossible to make a cermet TiC chip that can withstand shrinkage stress. As a countermeasure, the cast-in stress is relaxed and the shrinkage stress on the cermet TiC chip is weakened.
A possible combination of cast flux + porcelain is a kind of pot.
Hi-Cr cast iron has a temperature of 1500 ° C. ± 50 ° C., and conventional liquid flux has a limit of 1000 ° C. ± 100 ° C. In this case, except for the Ni plating at 1455 ° C., it does not become a wrinkle, so that the flux cannot withstand.

So, the role of flux as a traditional brazing tool is
1. It has the effect of removing and cleaning the oxide on the surface of the material.
2. Have activity in the brazing temperature range.
3. To have the effect of promoting the fluidity and spreadability of cocoons.
This is the condition of the date that is visible with the atmosphere.
The cast walnut is swallowed by Hi-Cr cast iron hot water at 1450 ° C. ± 50 ° C. in an instant, close to a kind of rigging, and exposed to high heat that is not good enough. This rapid heating and overheating causes cracks in TiC, and when the Hi-Cr cast iron is gradually cooled, it cracks and rises before the occurrence of shrinkage stress at 1450 ° C. → 1200 ° C. ± 50 ° C.
This is a conventional flux, and this extreme temperature range is about 20 seconds.

Although the rapid heat load is not visible, when the cermet TiC chip was cracked and pulverized when cooled and hardened or by this cutting, the cast walnuts so far have been observed. As a countermeasure to absorb this stress, it was the development of a flux that sticks in a foam state up to 1200 ° C. The soot is max 1000 ° C. The pottery is 1200 ° C to 1500 ° C.
This is the development of flux with both of these temperature conditions.
The feldspar that acts as a flux in porcelain clay was a mixture of meteorites.
Calorie calculation is calculated as 20 seconds to cool from 1550 ° C to 1200 ° C, so if you make a soot that can withstand 1200 ° C, it will contain lithium carbonate and barium carbonate that absorb the temperature up and elongation in flux. Therefore, the foamy flux absorbs explosive impacts and heat up to 1200 ° C, and the flux itself becomes glass on the liquid at high temperatures and can withstand heat and shrinkage stress by sticking to the surface of the cermet TiC chip. Proved.

Conventional Hi-Cr cast iron has been mainly used in the place of normal temperature wear. It was a 100% anti-wear liner with a max weight of 20 kg. If you want to extend your life, increase the wall thickness. Thicken becomes heavier. Because it exceeds the 20kg wall, the cemented carbide will become heavier.
The cermet TiC chip has a low specific gravity and can be easily made as a standard liner. However, it was not marketable. This is because there was no optimum flux in the casting.

Japanese Patent Application Laid-Open No. 2001-96182 “Long-life dentures for sinter ore crushing by the cast-out brazing method” Japanese Patent Application Laid-Open No. 2003-71556 “Method for Producing High-temperature Material Processing Working Member” Japanese Patent Application Laid-Open No. 2012-86225 "Cemented carbide casting method" JP 2010-100441 A "Liquid flux and its manufacturing apparatus" Japanese Patent Application Laid-Open Publication No. 2015-30451 “Casting method with cast iron and silver iron”

Next, problems of the invention introduced in each of the above patent documents will be described.
1. Problems of the cast-in brazing method introduced in Patent Document-1 Assembling by alternately sandwiching the cemented carbide chip WC and the cermet TiC chip, relieving the cast-in shrinkage stress, and flux is a solid flux coating, 400 ° C. Although the module is assembled by temporary baking at ˜500 ° C., the most important point is that after removing the vacuum thin film on the surface of the WC and cermet TiC chips, electroless copper plating is performed to form a brazed ridge.
The maximum limit of flux is 1000 ° C., and 100% brazing cannot be expected, but it has been successful to some extent in extending the life of the sinter ore grinding teeth and teeth.
Stress assistance by alternating WC and TiC castings has been successful.

2. Problem of manufacturing method of working member for high-temperature material treatment introduced in Patent Document-2 Although liquid flux is impregnated on the sprayed surface, it grows into a foam shape of dredged material and flux to relieve cast-up shrinkage stress. The vacuum thin film removal of the cermet TiC chip is difficult.
Liquid flux inorganic substance _{(H 3 BO, NA 2 B} 4 O 7 · 10H 2 O, KF, NaF, KBF 4 ···) for such is up max1000 ℃.
The question remains whether it can withstand Hi-Cr cast iron hot water at 1450 ° C. ± 50 ° C. for 20 seconds.
Since the brazing material is thermally sprayed, an oxide film may be stretched, and the mixed material of brazing material and oxide cannot be said to be 100% brazing material.

3. Problems of the cast-in-metal method of cemented carbide introduced in Patent Document-3 A liquid flux that can be electrolessly plated without removing the vacuum thin film on the surfaces of the cemented carbide chip (WC) and the cermet TiC chip. While etching the thin film layer on the surface of the cermet TiC chip with a strong PH-1 fluoride containing metal ions such as copper fluoride (CuCBF ₄ ) in a conventional liquid flux, the metal ions are driven by the principle of a Calbal battery. Although it is attached to the surface, max 1000 ° C. is the limit, and it is difficult to cast only a single cermet TiC chip, so it is a combined assembly casting of WC and cermet TiC chip.

4). Methanol of liquid flux introduced in Patent Document 4 and problems of its production equipment (A ₃ BO ₃ , NA ₂ B ₄ O ₇ · 10H ₂ O, KF, NaF, KBF _{4 and} others) in a strong magnetic field This is how to make a liquid flux with 30% or more dissolved in it.
This liquid flux has a limit of max 1000 ° C.

5. The problem of the method of soldering and stenciling with a silver-plated silver brazing method introduced in Patent Document-5 The liquid flux is impregnated into the porous surface of the three-layer plating layer by successively stacking the single plating Zn, Ag and Cu one after another. A silver candy is made with cast-in heat, and brazing is done with little cast-in heat. This is a cast-in method.

The above-mentioned flux developments from Patent Documents 1 to 5 were all developed by Tetsuo Harada, the present inventor, and were also researched and developed after knowing the advantages and disadvantages of cast-in.
Thus, it is crushed where it is surely eaten as a pump casing other than Hi-Cr, and cast into SUS casting as Ni-B plating on the particles of cermet TiC chips as composite plating. . At this time, it is necessary to coat the TiC particles 50 to 100 mesh particles one by one, and the conventional liquid flux contains nickel borofluoride (NiCBF ₄ ). I think it was because of 100% spherical coating for one.
In addition, because it is light, it uses the property that it floats and gathers in one place. However, as a cermet TiC chip having one angle, it has high heat resistance because it has a small amount of flux. A particle of 3g or more is impossible.

Thus, conventionally, in order to join the cermet TiC chip and the high chromium cast iron, the surface of the cermet TiC chip is coated with a brazing material. For this purpose, the vacuum coating thin film is previously removed from the surface of the cermet TiC chip. In addition, a complicated process such as re-plating or spraying after removing the thin film is necessary.

  The present invention relates to a manufacturing method of a Hi-Cr cast iron cast structure and a Hi-Cr cast iron cast structure that realizes brazing joining by the Kirkendell effect without removing the vacuum coating thin film between the cermet TiC chip and the high chromium cast iron. The cermet TiC chip is provided.

Means to solve the problem

The present invention fulfills the above-mentioned problems, and the technical means characterized by the following are the following 1) to 8).
1) The surface of a cermet TiC chip coated with a vacuum thin film on the surface is degreased and washed, washed with liquid flux, and then immersed in a liquid flux, and then heated to bake the liquid flux on the surface of the cermet. Coating the surface of the baking flux with electroless copper plating or Ni-B plating, and then forming a fired film of liquid flux containing porcelain to complete the surface treatment, and then casting with Hi-Cr cast iron The manufacturing method of the Hi-Cr cast iron cast-out structure characterized by the above-mentioned.

2) The surface of the cermet TiC chip coated with a vacuum thin film is degreased and washed on the surface, and then the liquid flux is immersed and adhered, then heated to bake the liquid flux on the cermet surface, Electroless copper plating or Ni-B plating is coated on the surface of the baking flux, then electroplating and Ni-B plating are applied, and then a liquid flux firing film containing porcelain is formed to complete the surface treatment. And after that, it casts with a Hi-Cr cast iron, The manufacturing method of the Hi-Cr cast iron cast-out structure.

3) The liquid flux includes potassium fluoride, acidic potassium fluoride, boric acid, borax, potassium borofluoride, and these are dissolved in an alcohol or acetone solvent, and the porcelain is a ceramic glaze. The method for producing a Hi-Cr cast iron cast structure as described in 1) or 2) above.

4) The Hi-Cr cast iron cast structure as described in 1) or 2) above, wherein the cermet TiC chip whose surface is coated with a vacuum thin film is immersed in a liquid flux for 10 to 15 seconds and covered with the liquid flux. Body manufacturing method.

5) Production of the Hi-Cr cast iron cast structure according to 1) or 2) above, wherein the coating thickness of the electroless copper plating or Ni-B plating is 1/100 to 3/100 mm. Method.

6) The method for producing a Hi-Cr cast iron cast structure as described in 1) or 2) above, wherein the coating of the electroplating and the Ni-B plating is 1/100 to 3/100 mm.

7) As shown in FIG. 1 (1), in the cermet TiC chip (10) whose surface is coated with a vacuum thin film (1), a fired film of liquid flux (2) on the surface of the vacuum thin film (1) coating. The electroless copper plating or Ni-B plating (3) is formed on the surface of the fired film (2) of the liquid flux 1/100 to 3/100 mm, and the electroless copper plating or Ni-B plating is formed. A cermet TiC chip for a Hi-Cr cast iron cast structure comprising a fired film (6) of a liquid flux containing porcelain on (3).

8) As shown in FIG. 1 (2), in a cermet TiC chip (10) having a vacuum thin film (1) coated on the surface, a liquid flux fired film (2) on the vacuum thin film (1) coating surface. ) And an electroless copper plating or Ni-B plating (3) is formed on the surface of the fired film (2) of the liquid flux 1/100 to 3/100 mm, and the electroless copper plating or Ni-B An electroplating (4) and a Ni-B plating (5) were formed on the plating (3) to 1/100 to 3/100 mm, and porcelain was contained on the electroplating and / or the Ni-B plating (5). A cermet TiC chip for a Hi-Cr cast iron cast structure characterized by forming a fired film (6) of a liquid flux.

Invention effect

  The present invention as described above is a simple and inexpensive means, for example, a pulverized coal injection pipe, a blast furnace bell-less raw material charging / distributing chute arm, a sinter ore crushing equipment demon tooth and a receiver. Applicable to all Hi-Cr cast iron cast-in structures that require wear resistance and / or heat resistance, such as teeth, piercers and dies of kneading vacuum extrusion molding machines, and their service life is 10 times longer than conventional ones. It is advantageously realized to extend to

The technical conditions and the operational effects (: technical significance) resulting from the above-described features of the present invention will be described in detail below.
Conventionally, a vacuum cured film TiN. TiCr. Since TiCrN or the like was not attached with electroless plating, it was forcibly removed by a strong alkali reaction. It is heated with a loadable soda solution (NaOH-PH-12) at a maximum of 100 ° C. for 30 to 40 minutes, and then hydrogen peroxide (H ₂ O ₂ ) is dispersed in a maximum of 20% 3 to 4 times, and impact is applied. It was removed with foam (2H ↑).
100% could not be removed at one time, and this operation was performed 2-3 times to remove the 100% vacuum film. It is a time, expense and risky work.
It was immersed in the liquid flux without being influenced by this process, and then removed from the liquid flux and ignited and baked copper borofluoride (CuBF ₄ ), thereby enabling electroless copper plating.

Conventional adhesive containing 70% liquid flux, 30% inorganic substance as glaze, copper borofluoride (CuBF ₄ ) or nickel borofluoride (NiBF ₄ ) as glaze, and bonding glaze The lithium oxide (Li ₂ O) is dissolved in max 5% in the liquid flux.
Conventionally, as for the electroless plating, it is not considered to make a plating mainly composed of two elements of Ni + P or Ni + B of a single copper plating or Kanigen plating. When the liquid flux is injected into the surface of the porous plating in combination of three elements of zinc (Zu) + copper (Cu) + silver (Ag) and heated, the melting point falls due to the formation of silver.
Thereby, it is possible to make a ternary silver candy at 650 ° C to 850 ° C.
In addition, copper + nickel → silver candy (900 ° C) can be made.
Since it is possible to make quaternary silver iron such as Cu + Mu + Ag + Ni →, it is suitable for low temperature brazing by reducing hot water of Hi-Cr cast iron.

It is a 1200 ° C ± 50 ° C flux that is close to a kind of glazing that combines the advantages of liquid flux with a glaze that contains 30% porcelain in 70% of the conventional liquid flux.
Potassium feldspar (K ₂ O.Al ₂ O ₃ .6H ₂ O—1400 ° C. ± 50 ° C.) kaolinite (Al ₂ O ₃ .SiO ₂ .2H ₂ O-1600 ° C.) glass with improved heat resistance Quality flux is born.
Therefore, the conventional flux of max 1000 ° C. has been improved in heat resistance from 1200 ° C. to 1300 ° C., and a preferred cast-up flux of 1450 ° C. ± 50 ° C. has been obtained.
“Heat resistance” refers to about 20 seconds up to 1200 ° C. at which 1450 ° C. ± 50 ° C. Hi-Cr cast iron is semi-solidified. In this 20 seconds, flux can be brazed with a brazing material and cast-in Hi-Cr cast iron only after it is made into a 100% liquid glass that is turned into a liquid glass from a blistered and semi-jelly form.
When a cermet TiC chip is brazed in Hi-Cr cast iron, the melting point can be lowered by the alkali metal and alkaline earth metal entering the glass.
The purpose of the glaze is to seal against the soil, and it has been designed to form a water tank at 1220 ° C or higher and stick to the soil to vitrify it. Instead of the soil, the cermet TiC chip is a heat resistant soil. The purpose is the same.
It is flux if the cermet surface is cleaned and the surface tension is removed.
This idea was the fusion of liquid flux and glaze.

The cermet TiC chip mainly relates to a technique of combining small objects to make one segment by reusing a machining cutting chip.
Since the cermet TiC chip is mounted on the cutting table, mounting holes of φ3 to φ5 are formed.
The cermet TiC chip is electrolessly plated with 1/100 to 5/100, and fixed to the mounting plate with nuts with bolts M3 to M5, and then the segment to which the cermet TiC chip is attached is now electrically connected. Plating and plating 5/100 to 10/100 thick.
Since the electric density is concentrated on the square face as a feature of the electroplating, the four corner faces of the cermet TiC chip are thickened with 10/100 to 15/100, and copper or Ni is plated.
This plating is used as a brazing material.
Since the cermet TiC chip has been electrolessly plated in advance, the electroplating adheres 100%. Hi-Cr cast iron is cast into a segment in which various cermet TiC chips are incorporated to form a special shape (devil) (receiving tooth) pipe opening piercer, blast furnace bellless liner, large bell liner, large size It has become possible to extend the service life of blower lift blades, etc., beyond the conventional overlay.

The brazing material for cast-gourd water is made of a material close to the coefficient of linear expansion, and is brazed with a laminated plating for the purpose of lowering the melting point.
White elements have a low melting point and a large linear expansion coefficient, but the elements that can be used as cast-in Hi-Cr cast iron are Mn. Ag. Cu. Ni. Up to Zn.
The present invention is a technique for producing a eutectic alloy with a multilayer plating for the purpose of alloying and using it as a brazing material. Since it is porous even if it is called multi-layer plating, it removes the surface tension of the brazing that dissolves with hot water of 1450 ° C ± 50 ° C by being pooled in the porous surface when impregnated with liquid flux. Make the appendix successful.

The maximum stress of Hi-Cr cast iron is generated for about 20 seconds when the temperature drops from 1450 ° C. ± 50 ° C. to 1200 ° C. Hi-Cr cast iron is poured from the gate, and the hot water is up to the push-and-use gate, until the surface is wrinkled with an oxide film.
Although the calculation is 19 seconds, the brazing is completed without breaking the cermet TiC chip if the 20 seconds is withstood. Therefore, it is a condition that the film can be applied uniformly with a flux that can withstand up to max 1200 ° C.
A simple idea is to burn the flux thickly. In that sense, the soot can be baked thickly by 1 m / m or more. Seto and pottery [glaze]. In addition, it has a function of preventing oxidation and removing surface tension against the underlying brazing material (Ni + B) (Ni + Cu) (Cu + Ag) (Cu + Mu).
The cocoon bites the base and does not flow and is close to the cocoon material flux, but it is max 1000 ° C., which is one step now.
There is currently no cocoon of 1200 ℃ in Japan. In consideration of the distortion prevention of the other party, the maximum limit is 800 ° C, and there are few uses such as signs, containers, and heat storage plates (for air heaters). Patent Documents 1 to 5 also have a maximum of 1000 ° C. and can only improve by 200 ° C.

However, it can be said that this is a good temperature for matsutake mushroom, coal, heavy oil, kerosene, gas and electricity as a heat source at 1200 to 1300 ° C.
There is a nature other than medicine, but it is not necessary as flux.
Typical examples of porcelain clay include potassium feldspar and (K ₂ O, Al ₂ O ₃ .10H ₂ O) kaolinite (Al ₂ O ₃ , SiO ₂ .2H ₂ O). These two are 70-80% and the remaining 20% is limestone, magsite (MgO ₂ )
These feldspars, meteorites, coal stones, and magsites do not dissolve in 100% alcohol.

Potassium feldspar (K ₂ O, Al ₂ O ₃ , 6SiO ₂ ) → 1220 ° C. Soda feldspar (NaO ₂ , Al ₂ O ₃ , 6SiO ₂ ) → 1100 ° C. Lithium feldspar (Li ₂ O, Al ₂ O ₃ , 2H ₂ O ) → 1350 ° C
Dolomite (CaMg (CO ₃ ) ₂ ) → 1010 ° C. Barium carbonate (BaCO ₃ ) → 1740 ° C.
Lithium carbonate (Li ₂ Co ₃ ) → 1500 ° C. Kaolinite (Al ₂ Si ₂ O ₅ (OH) ₄ ) → 950 ° C.
Cryolite (Na ₃ AlF ₆ ) → 1020 ° C
It is a mineral that can be used flexibly. In any case, 1200 ° C. is blended by calculation. Table 1 shows the formulation examples.

Potassium feldspar is suitable for flux because it has a wide firing temperature and maintains a high glassy viscosity, but sodium feldspar is as low as 1100 ° C. Use as raw material.
is necessary.

K. The glaze containing Na has a large expansion rate and is easily broken, so that it is difficult to break into lithium or barium. This is because a large amount of Na is also contained in the liquid flux, so that it is easy to break, which causes blistering of bubbles. Therefore, two liquids with a maximum of 5% are put in the main component of one liquid.
Bubbles are generated by adding an alkaline earth metal to the carbon compound of the gas generating agent as carbon dioxide gas as strontium carbonate (SrCO ₃ ), barium carbonate (BaCO ₃ ), calcium carbonate (CaCO ₃ ), lithium carbonate (LiCO ₃ ) However, it prevents the flux from dropping off.
As a flux, it has a flux-like composition with a mixture of 30% glaze to 70% liquid flux, and is heated up by removing moisture from the sand mold by temporarily heating the mold (sand mold) at 400 ° C to 500 ° C. By suppressing the growth of bubbles in the glassy flux, this bubble absorbs the thermal shock of Hi-Cr cast iron at a temperature of 1450 ° C ± 50 ° C, and itself is glassy at 1200 ° C ± 50 ° C. Thus, the plating flaws on the surface of the cermet TiC chip are protected from oxidation, the surface tension of the hot water is removed, and the role of brazing flux is played, and the cast of Hi-Cr cast iron is aided.

As the liquid flux used in the present invention, the chemical components in the liquid flux at max. 1000 ° C. produced by “Liquid flux and its manufacturing apparatus” introduced in Japanese Patent Application Laid-Open No. 2010-10041 are shown as an example.
Each inorganic reagent is a ratio (weight WT%) shown in 100%.
1) Potassium fluoride (KF): 20WT%
2) Potassium fluoride (KHF ₂ ): 20WT%
3) Boric acid (H ₃ BO ₃ ): 40 WT%
4) Borax _{(Na 2 B 4 O 7 ·} 10H 2 O): 10WT%
5) Potassium borofluoride (KBF ₄ ): 10WT%
However, this liquid flux cannot be used alone at Hi-Cr cast iron hot water of 1450 ° C ± 50 ° C.
Therefore, it is a flu containing 30% pottery glaze in 70% liquid flux. The inventors have completed the development of flux in a carburizing furnace at 1000 ° C. or higher according to Japanese Patent Application Laid-Open No. 2012-055921 (carburizing brazing method).

Although it is easy to simply raise the temperature, the role of flux is as it was done before, but no flux with glaze has been made so far.
Lithium silicate (SiO ₂ / Li ₂ O) is a kind of water glass, but also serves as a flux. It does not cause decomposition or dissolution up to 1000 ° C., and it becomes a glaze adhesive even if it is formed into a glass and self-dissolves in liquid flux.
The thermal reaction between the liquid flux and the glaze produces a kind of soda glass + α.
The components of this soda glass + α are SiO ₂ : 70 to 73%, Na ₂ O · K ₂ O: 10 to 15%, CaO: 5 to 8%, B ₂ O ₃ : 2 to 3%, Al ₂ O ₃ : 0.5-2%, LiO: 0.5-1%, CaF: 0.5-1%.
These multi-component glassy functions cause the formation of a network oxide, and vitrification causes a temperature drop in the vicinity of 1200 ° C to 1300 ° C.
When a material near CaO (calcium oxide: 1550 ° C.) Al ₂ O ₃ (aluminum oxide: 1600 ° C.) is vitrified in the same manner as metal alloying, it falls to 1200 ° C. to 1300 ° C.
When it becomes SiO ₂ , B ₂ O ₃ , P ₂ O _5, etc., and combined with Na ₂ O · K ₂ O, the following formula (1) is obtained.

Such ion separation leads to vitrification that lowers the melting point.
Entering these glazes into the liquid flux creates a glass with multiple functions. When the fluorine in the fluoride enters the glass and changes to calcium fluoride, it performs a cleaning action. Lithium oxide Li ₂ O plays a role of improving the flow by jumping out as Li ions by being forced to decompose.

Inventors have also in Japanese Patent Application No. 2004-245836 blast furnace溶滓trough,硼弗copper _(CuBF 4 -30%) Katsura sodium fluoride (NaSiF ₆ -5%) borax _{(Na 2} B ₄ O 7 .10H ₂ O-15%) sodium bromide (NaBr-5%) boric acid _{(H 3} BO ₃ -13%) cesium carbonate (CsCO ₃ -2%) blast in Toys with boron oxide _{(B 2} O 3 -30%) There is a track record of brazing the pipe with this heat in casting water at 1450 ° C. ± 50 ° C. of FCD-450 with a water-cooled pipe casting.
Brazing and consisting硼弗copper _(CuBF 4 -30%) is made with brazing material as copper brazing at about 1100 ° C. at 1450 ° C. heat.
Since the amount of plating in advance on the chip is small, there is a risk of burning in an instant, so the entire plate is plated in advance and the top is baked with flux to bond the heat resistance of Hi-Cr cast iron hot water to 1450 ° C ± 50 ° C and copper plating I did it.

Next, the significance of the main technical conditions of the present invention will be described.
As a method of casting the recovered cermet TiC chip into high chrome cast iron, the coating film removal process has been conventionally required since the plating is difficult unless the vacuum thin film on the surface of the cermet TiC chip is removed. The present inventor (Tetsuo Harada) After the impregnation in the liquid flux developed by the company, the metal body in the flux is baked on the vacuum thin film by burning with burning. For this reason, the electroless plating of the next process became possible.

The liquid flux is obtained by dissolving 30% of the next inorganic substance in 70% of methanol.
Boric acid (H ₃ BO ₃ ), borax (Na ₂ B ₄ O ₇ .10H ₂ O), potassium borofluoride (KBF ₄ ), sodium fluoride (NaF), potassium fluoride (KBF), copper borofluoride ( CuCBF ₄ ) or nickel borofluoride (NiCBF ₄ ) containing fluoride ion metal in liquid flux.

Since electroless plating becomes a flaw, copper, nickel boron, silver, etc. are suitable for temperature alone, but by combining two or more of zinc + copper, copper + silver, copper + nickel, it becomes an alloy flaw, It is also possible to make a metal bowl with a low melting point.
Reducing the amount of hot water can cover the lack of heat of melting cast iron water.
The cast-in brazing is completed at 700 ° C to 1000 ° C.

Finally the liquid flux to coat, said first further in a liquid flux to coat the clay near the enamel flux70% + 30% China clay (potassium feldspar _{K 2 O.Al 2 O 3 .6H 2} O) ( kaolinite Al ₂ (O ₃ .SiO ₂ 2H ₂ O) is placed in a 100% solution of the cast rim segment to which the cermet TiC chip is attached, and then fired to burn 100% alcohol and moisture to temporarily bake the clay.

Temporarily baked cermet TiC chip segments are put in a sand mold and reheated at 450 ° C. to 500 ° C. while being in a mold shape, and flux is secondarily baked.
In this secondary baking, K.O. Na. Li. B or the like is formed into a low-temperature glass and is swollen on the foam, and is coated on the plating layer on the surface of the cermet TiC chip segment.
It takes about 20 seconds until the foam becomes 100% glassy, but during that time, it is possible to braze the Hi-Cr cast iron in order to protect the metal plating as a flux from oxidation and remove the surface tension. .

The cermet TiC chip is fixed to the attachment fin by electroless plating once in advance. One unit attached to the fin is referred to as a module segment, and the module segment material is assembled by welding at SS400 where degreasing is applied.
The plated product is assembled, and the final plated product is coated with liquid flux and cast with Hi-Cr cast iron.
As a feature of plating, the corners are thick. 1/100 → 5/100 mm thickness.
In order to make the TiC plating thicker, the second plating will be an electric plating.
In order to carry out electroplating, it is necessary to be electrically conductive after 100% assembly. This is why each single item is electroless in the pretreatment step.

For the module segment, the temperature is as high as single copper plating 1083 ° C, single nickel 1455 ° C, single silver 960 ° C, single manganese 1245 ° C, but the plating metal Cu + Ni → cupro plating 1000 ° C-1050 ° C, Cu + Ag → binary silver iron 890 ° C. to 900 ° C., Cu + Mu → 1000 ° C. to 1100 ° C. As a binary brazing material, the melting point was lowered to enable alloy brazing.
As a result, the linear expansion coefficient is maintained between the Hi-Cr side and the cast-in material side as much as possible.
Iron SS400 → 11.7 × 10 ⁻⁶ , Hi-Cr cast iron 10 × 10 ⁻⁶ , Cermet 8.2 × 10 ⁻⁶ , Copper 17.6 × 10 ⁻⁶ , Ni → 13.3 × 10 ⁻⁶ , Kyupro (Cu-50 vs. Ni-50) 15.4 × 10 ⁻⁶ , Cu + Ag → 18.6 × 10 ⁻⁶ , Cu + Mu → 19.8 × 10 ⁻⁶ , the plating side is always high and becomes a cushion.

(1) It is explanatory drawing which expands and shows the cross section of the coating layer on the surface of the example of the cermet TiC chip | tip of this invention, (2) enlarges the cross section of the coating layer on the surface of another example n cermet TiC chip | tip. It is explanatory drawing shown. Correlation diagram of alkali and silica to confirm how to burn Graph showing fire resistance of a mixture of potash and soda feldspar The experiential value is replaced with the calculated value as a glaze to confirm the melting method in the correlation diagram of alumina and silica. The graph which shows an example of the high temperature hardness of various weld metals. It is a figure which shows the side cross-sectional outline | summary of the sintered ore crushing equipment of the sintering factory of the iron mill introduced in the application example 1. FIG. Longitudinal sectional view (1) of a single tooth receiving of the sintered ore crushing equipment introduced in Application Example 1, and a vertical cross section in which the main part of the receiving tooth is casted with cermet TiC chip with Hi-Cr cast iron as a feeder. FIG. 2 is a cross-sectional view (3) of the result of casting with Hi-Cr cast iron by the method of the present invention. It is an application example 2, and the vertical cross section (1) of the divided tooth receiving segment of another tooth receiving example of the sintered ore crushing equipment, and the same tooth receiving is casted with Hi-Cr cast iron with a cermet TiC chip according to the method of the present invention. It is the cross-sectional view (2) which shows a state, and its longitudinal cross-sectional view (3). It is the example 3 of application, and is the longitudinal cross-section explanatory drawing (1), the side cross-section explanatory drawing (2), and a cross-sectional view (3) which show the tip structure of the water-cooled demon tooth of the said sintered ore crushing equipment. Side view (1), perspective view (2), cross-sectional view from arrow CC of (2), (2) and (2) of the distribution short armor of the blast furnace bellless ore charging equipment introduced in Application Example 4 (2) ) Is a vertical cross-sectional view (4) from the arrow DD, a cross-sectional view (5) and a vertical cross-section (6) of the liner of the chute. It is the application example 5, and shows the longitudinal cross-sectional structure of the drilled piercer and die for forming a special pipe of 13Cr-1Ni for oil drilling They are the example 6 of application, and are the cross-sectional view (1) and longitudinal cross-sectional view (2) of the blade | wing of a kneading extrusion screw which are the dust agglomerates collected with the electric dust collector etc. FIG. 13 is a transverse sectional view (1) and a longitudinal sectional view (2) showing a cast-in structure of a paddle blade of the kneading extrusion screw blade shown in FIG. It is application example 6 and is a cross-sectional explanatory view of a chute tip hardware mounted on the head of the tone box of the sintered ore crushing equipment introduced in application example 1. FIG.

  Next, the form for implementing this invention and the application examples 1-7 of the cermet TiC chip | tip of this invention are demonstrated in detail.

If it is supposed to make a ternary silver candy by multilayer plating, Zu 2/100 Ag 4/100 Cu 2/100 6/100 m / m is Zu (30%) Ag (40%) Cu (30%) It is possible to make by electric thick plating, and the plated surface has uniform pinholes. When the liquid flux is put into this pinhole and heated, the plating layer forms a eutectic alloy by the Kirkendle effect and a silver glaze can be formed. In the case of complex shape welding, the flow of wrinkles due to temperature distribution flows in the higher direction, so it is placed in advance. 100% plating is possible where the plating solution flows even in various complex shaped segments based on the same principle.
Brazing with 1450 ° C ± 50 ° C melting heat of Hi-Cr cast iron, or Cu as a cast iron brazing -1083 ° C (Ni simple substance -1455 ° C is impossible, Ni + P: 950 ° C ± 50 ° C Ni + B-1000 ℃ ± 50 ℃)
The semi-solid state of Hi-Cr cast iron is brazed at around 1200 ° C, and in the case of silver cast iron, it is necessary to take measures at 1200 ° C if the small item (max 5kg) is 10kg or more.
The liquid flux is obtained by dissolving a general glazed flux in alcohol in a strong magnetic field of 30% to 40%, boric acid (H ₃ BO ₃ -180 ° C. to 800 ° C.), borax (Na ₂ B ₄ O ₇ · 10H _2). O-740 ° C to 1000 ° C) Potassium fluoride (KF-800 ° C to 1000 ° C) Sodium fluoride (NaF-650 ° C to 750 ° C) Potassium borofluoride (KBF ₄ -450 ° C to 600 ° C) Boride and fluoride Since it was aimed at 450 ° C. to 1000 ° C. with a combination of chemical compounds, exposure to Hi-Cr cast iron at 1450 ° C. ± 50 ° C. for 20 seconds burns, so only an instantaneous effect can be expected. Considering that it can endure even at a moment of max 1600 ° C., Al ₂ O ₃ -0.5 mol and SiO ₂ 5 mol are stabilized from the correlation diagram 1 of alumina (Al ₂ O ₃ ) and silica (SiO ₂ ). Table 2 shows the molecular weight of each component.

Table 3 shows a component table of main glaze raw materials.

When 100% of these glazes are added at a calculated molar ratio, the potash feldspar-K ₂ O.O. Al ₂ O ₃ . 6H ₂ O soda feldspar _-Na 2 O. Al ₂ O ₃ . The two types of 2H ₂ O are only the addition of Al ₂ O ₃ to the ratio of K and NA, but refer to FIG. Change freely.
And since the elements K and Na as flux are contained, the heat resistance can be increased only by adding these two, but it does not dissolve 100% in the liquid flux.
While the liquid flux was adhering these glazes up to a maximum of 1000 ° C., these glazes made a heat-resistant seal, so that casting was possible.

  Table 4 shows a general pottery as a glaze on the surface of the soil. As an example, Fukushima feldspar (80 g), synthetic earth ash (20 g) and kaolin (10 g) are shown in Table 4.

Table 5 shows a composition table of main glaze raw materials.

The results of determining the number of moles of each component are shown in Table 6.

The glaze with the above blending ratio of 110 g is 1.52 mol. 10 g is a burning consumption amount.

The calculated number of moles of each component is grouped by the group of [alkali] [alumina] [silica], the number of moles of alkali is added, and other components (alkali and silica) so that the total number becomes 1. Table 7 shows the result of aligning the numerical values.

Table 8 shows the results obtained by dividing each component by the total number of alkali components (0.3 mol) and aligning the numerical values so that the total alkali component is 1.

FIG. 4 shows an experiential value replaced with a calculated value as a glaze for confirming the melting method in the correlation diagram of alumina and silica.
The point V at which alumina-0.6 becomes silica-3.5 is the optimum condition for stability as a glaze.

There are many common elements to combine drug glaze and liquid flux, but liquid flux is saturated with about 30% of flux forcibly dissolved in a strong magnetic field. Can not. The liquid flux is stuck to each glaze particle 360 °, which exerts a force on the wettability of the chip surface, and a slurry of 30% glaze liquid flux 70% on the segment incorporating the entire chip. Immerse it in a glazing solution, check the coating with [Wettability] and turn on the fire to burn 100% of the alcohol.
This is the completion of the segment with the flux + glaze.
The whole white-baked segment is put in a sand mold, and the whole is further baked at 450 ° C. ± 50 ° C. to remove moisture in the sand in the mold.
The glaze particles temporarily baked in the flux are now swollen mainly due to the semi-dissolution of boric acid (H ₃ BO ₃ ) in the flux and fixed in the tick.
Since the volume is increased by about 30%, the flux is porous. When melted Hi-Cr cast iron at 1450 ° C ± 50 ° C flows here, the instantaneous elongation of the cermet TiC chip due to thermal stress leads to cracking, but this 30% foamy flux + glaze gives thermal shock. Absorbs and produces a glass-like [wetting property].
The flux stuck in the glass liquid state protects the plating metal on the surface of the cermet TiC chip from oxidation and removes the surface tension, thereby brazing the Hi-Cr cast iron and the cermet TiC chip.

The conventional liquid flux was achieved by entering ceramic glaze freely from 1450 ° C to 1600 ° C with respect to max 1000 ° C.
It is a flux that is very similar to a spider. The conventional soot is also raised to a maximum of 1000 ° C. by adding several percent of zirconia oxide, alumina oxide and silicon oxide.
Although there are no major changes from the Meiji era to the home pan, frying pan, and bathtub, it is a good place for the cocoon, but it is gradually declining.
Although there are no heat-resistant irons for heat exchangers that are heat-resistant up for the purpose of stainless steel + α with respect to the base iron and castings, there is no such thing as 1450 ° C to 1600 ° C.
When it becomes a 1 million KW-class thermal power plant as a heat storage plate of a heat exchanger, SUS304 is burned with cobalt oxide coated soot as a primary low-temperature heat storage plate of 50t to 60t, which is dilute nitric acid. As a countermeasure, the combustion air is warmed from the exhaust heat as an air heater at 400 ° C. to 500 ° C. Porous is prevented and corrosion resistance and heat resistance are increased.
This liquid flux + glaze combination also serves as a substitute for acupuncture.

Inventor Tetsuo Harada et al. In the invention introduced in Japanese Patent Publication No. 2013-035017 [Coating Material and Casting Method] apply liquid flux in a sand mold in advance and bake the mold at 450 ° C. to 550 ° C. for moisture. Unsaturated oleic acid (outside furan), chlorinated organic material (anilic acid), etc. that hardens sand as a method to prevent reabsorption of hydrogen gas by sealing each sand particle with liquid flux when skipping the minute Suppresses absorption when re-disassembles.
The mold is preliminarily fired at 450 ° C. to 550 ° C. The flux is applied to the entire floor surface in advance, ignited, the sand mold is reinforced and the sealing properties are increased, and the segments are incorporated.
A Nurikatachizai For 100% sand mold for casting the main component is graphite + boric acid used _(H 3 _BO 3) + borax _{(Na 2 B 4 O 7 ·} 10H 2 O), 1000 ℃ nearby heat resistance It is a boric acid-based work that binds sand.
Conventionally, there were very few measures against hydrogen gas generated. Since our coating agent has sufficient countermeasures against dehydrogenation, the method of eliminating the hydrogen generated in the casting is almost complete, so that the TiC chip casting can be 100% possible.
In order to assemble a cermet TiC chip in a complicated manner, Hi-Cr hot water is always raised to + 50 ° C. Therefore, a heat-resistant upflux is further required. Because of various combinations such as Iseki, heat resistance, surface tension removal, and flow damage, computational casting techniques are required up to the thermal energy of hot water. The casting cost increases as more hot water is used, so the maximum product weight is about 20%. However, if the amount is too small, a heating agent is required as a cooling inhibitor on the surface of the hot water as a countermeasure against shrinkage. The cost of casting is up. In order to make a 100% product with a small amount of hot water, casting requires the design of the runner of the hot water flow, measures against cooling effects due to the difference in wall thickness, technology and experience. Therefore, experience is necessary for many years and it is becoming a declining industry.

The graph shown in FIG. 5 is an example of the high temperature hardness of various weld metals.
From this graph, the hardness drops abruptly at 500 ° C. Even with the same workpiece chip, the WC carbide chip shows the highest hardness up to 200 ° C, but drops nearly 20% compared to the cermet TiC chip, and is about 1/3 of TiC at 800 ° C.
The use of the recovery cermet TiC chip can be recovered close to zero because it is expensive. It is the most suitable material for high temperature wear where heat is applied to recycle resources. The high temperature hardness of Hi-Cr cast iron as the same main metal is shown.
Since this Hi-Cr cast iron is used to cast a cermet TiC chip, the life can be extended 3 to 5 times by using a water-cooled structure so that it is used within a maximum of 450 ° C.
Examples of application of the cermet cermet TiC chip of the present invention will be introduced below.

Application example 1

The figure which shows the side surface outline of the sintered ore crushing equipment of the sintering factory of a steelworks in FIG.
It is a facility that sinters iron ore with quick lime and coke, sinters on a pallet truck at around 1000 ° C., crushes this, cools it, and enters the blast furnace.
Briefly describe the equipment.
01 is baked with iron ore, quicklime and coke on the trolley while running on the pallet trolley. 02 is a sintered ore that falls from the pallet truck, pooled in the stone box 03 in a cool manner, and uniformly falls on the public distribution surface.
04 is a rotating demon that crushes sintered ore. It is a water-cooled structure, and 05 is a blade of a demon tooth. Of course, it is water-cooled with a white iron-cast iron overlay. However, because of the build-up, there are many cracks, reaching 600 ° C. ± 30 ° C. even with calorie calculation or without cracks.
06 is a hardened structure with a water-cooled structure, which is a receiving tooth, but because of the buildup, there are many cracks, so the place at 550 ° C. ± 50 ° C. is full.
07 is a sintered ore crushed by the demon teeth and the receiving teeth and flows on the top surface of the stone box 03 near 1000 ° C. The pool holding surface which should be called Izeki is also a place where heat and friction resistance is applied, and Hi-Cr cast iron is used.

The optimum grain size is selected for the blast furnace using the vibration sieve 08. The large sintered ore is pulverized again with another pulverized material (W roll method).
The above is the main of the sintering equipment, but all are exposed to high temperature wear.
Only 04, 05 and 06 are water-cooled, but the tooth receiving 06 is reversed for about 2 years, and it is only 2 years.
Casting a TiC cermet chip in Hi-Cr cast iron has a lifespan more than twice as long.
Further, if the cast-in surface can be maintained at 450 ° C. or lower, the life can be expected to be further extended.
It has been water-cooled and has not been used for about 30 years. The inventor has developed a cast flux for long-life toothing for sinter ore crushing by the Japanese Patent Application Laid-Open No. 2001-96182 in the past. Cermet TiC chips were also expensive.
Moreover, the cost of removing the vacuum thin film on the surface of the cermet TiC chip was also a cause of the cost up.
Since the cermet TiC chip is weak in compression application, only 20% of the top surface that cracks and rises is used. In the invention of Japanese Patent Application Laid-Open No. 2003-71556, a challenge was given to casting a cermet TiC chip, but at this time it was difficult to remove the vacuum thin film because it was 100% plated.
We have developed a technology to impregnate the liquid flux into the porous surface of the arc sprayed surface without thick plating.

Application Example 1 is a tooth receiving 100 of the sintered ore crushing equipment shown in FIG. 7, a longitudinal sectional view of one tooth receiving 100 is shown in FIG. 7 (1), and the main part of the tooth receiving is Hi. -(2) of FIG. 7 shows a structure casted with Cr-cast iron, and a cross-sectional view showing the main part of the receiving teeth cast with Hi-Cr cast iron of the cermet TiC chip shown in FIG. 1 of the present invention. 7 (3).

In (1) to (3) of FIG. 7, this tooth receiving 100 is a water-cooled structure in which rough pulverization is performed while shearing a sintered ore that has been sintered and hardened by a demon that enters between the adjacent tooth receiving. It is a denture.
The incoming water on the left side of (1) in FIG. 7 flows through the chamber divided into the upper part through the lower part.
Reference numeral 101 denotes a divided tooth receiving segment 101 of a Hi-Cr cast iron cast divided into three equal parts in the central three ridges. This is a place where the falling impact and expansion and contraction are severe, always falling and crushing. It is not a one-body structure, it is divided and about 30% higher than the front and rear divided tooth receiving segments 106. Is a feature. 107 is a tooth receiving that is lowered in the center so that the fall of the sintered ore does not go to the inverted tooth receiving, and the cermet TiC chip is not included.

The Hi-Cr cast iron 103 for casting the cermet TiC chip 102 arranged at the tip of the divided tooth receiving segment 101 is Cr ₂ C ₇ (chromium carbide) NbC ₂ (niobium carbide) WC (tungsten carbide) MoC (molybdenum car). Bite) VC (Vanadium Carbide) Designed to produce 5 types of carbides, as shown in Fig. 7 (2), the amount of carbon is 3.5% max. Designed with high. Refer to the special high-temperature hardness Hi-Cr cast iron in Fig. 5.
104 is a copper fin bolt for cooling Hi-Cr cast iron, and it is possible to cool it to 430 ° C. or lower, and it is a feature that ^three divided tooth receiving segments are put in about 150 cm ³ . Designed to hold HV-900 ± 20, it is a structure that uses three copper bolts of M30 × P = 2 in calorie calculation and always immerses and cools in a water cooling chamber.

105 is a cast main body plate that serves both as a Hi-Cr cast iron prevention and water cooling chamber, and anchors the Hi-Cr cast iron to the 40 m / m plate thickness of SS400 with two trapezoidal grooves 111 as a preventive measure.
Reference numeral 108 denotes a side plate for securing a water channel in the case of reversing the water and draining change side plates 105 and 106.
Reference numeral 109 denotes an H-steel side plate also serving as a water-cooling chamber, which has an H-shaped cross section and forms and holds both side surfaces of the entire tooth receiving portion, and a curing liner for protecting 109 is arranged on the side surface.
A copper plate 110 serves as a cushion for expanding and contracting due to the overall thermal stress.
The linear expansion coefficient between Hi-Cr cast iron and iron covers a difference of about 20% between 9.5 × 10 ⁻⁶ and 11.7 × 10 ⁻⁶ with 17.7 × 10 ⁻⁶ of copper. (The copper plate plays the role of a kind of shock absorber.) If it is not cooled with sintered ore close to 1000 ° C, it will reach 700 ° C ± 100 ° C, so the conventional water cooling is 627 ° C ± 30 ° (meat Because of the prime method, there were many cracks and water cooling efficiency was bad.) And the high temperature hardness table reference in FIG. 5 (HV-300 to 450).
This is a segmented tooth receiving with a cermet TiC chip in a special Hi-Cr cast iron that retains twice the hardness of the conventional one, and from which five types of composite carbides come out. In addition, the water channel is designed to secure 15 liters of water even if the water stops temporarily like a water storage line, and always secures 30 liters of water up and down.

In FIG. 7 (3), the cross section of Hi-Cr cast iron cast 103 of the tooth receiving split tooth receiving segment 101 system, the arrangement of the cooling bolt 112 and the cermet TiC chip 102 are shown.
The Hi-Cr cast iron fillet 103 is cast iron from which a special composite carbide is produced. The lower trapezoidal groove 111 is prevented from coming off. The cermet TiC chip 102 has a structure in which the cooling fin 113 is fastened with bolts and bolt nuts. The cooling fin 113 is welded and assembled to clad steel and welded to a copper bolt case 114. The cermet TiC chip 102 is plated with electroless Ni-B on the cured film in advance using a special liquid flux without removing the vacuum thin film which is the cured film on the surface.

Reference numeral 115 denotes a main plate in which a trapezoidal retaining groove 111 is dug in a 40 m / m thick plate serving as a cast-in frame. 116 is an SS400 pipe for welding with 105 crut steel 105, and is cast with 45% to 35% plaster of silver paste mixed with flux and φ10x15l powder silver iron on top surface 104P of copper bolt 104 And brazing at a temperature of 1500 ° C. to 1550 ° C. Therefore, 104 and 104P are united and there is no change in the cooling effect. The copper bolt 104 had a P = 2 thread at M30, and the fin area was 20% up. The clad steel No. 105 is made of SS400 on both sides and a copper plate on the center, tightened with 6-M6 bolts, and silver-plated from the outside.

Reference numeral 112 denotes a bolt nut that holds the cermet TiC chip 102 to the cooling fin 113.
Since the cermet TiC chip 102 is stopped by the cooling fin 113 that produces the holding plate anaerobic cooling effect, the close contact portion has a cooling effect. And after the assembly is completed, the Ni + B plating is plated at 1200 ° C. ± 50 ° C. by the cast-in heat and the special flux application effect in order to electroplate the whole with the chip 102 attached.
Due to the double effect of cermet TiC chip 102 and HV900 ± 30 compared to HV550 ± 30 of special Hi-Cr cast iron, the life is nearly three times longer. In addition, as a countermeasure against slime attached to the water cooling chamber, since a magnet is contained in the copper bolt 104, an ionic current flows from iron to copper, so that the slime adhesion prevention effect is great.
In (2) of FIG. 7, 117 is Iseki, and since the special Hi-Cr cast iron of the feeder is directly hit, the holding of the cermet TiC chip 102 welds SS400 9m / m to SS400 3.2m / m. Stop at this Iseki and raise it by convection.
The hot water is surely entered into the pouring gate 118 serving as the top of the sand mold at the two Iseki 117, and the hot water is solidified after 20 seconds without being cooled to the end with the help of the heat generating agent. Hot water is supplied to the extent that the volume at the time of contraction shrinks.
The sprue / push spout 118 is connected to the trapezoidal groove 111 through the runners 119 and 120 divided into two, and stops at the Iseki 117, so that it rises and then descends and is forced flow.

Application example 2

The application example 2 is also a tooth receiving, and a detailed view is shown in (1) to (3) of FIG.
In (1) to (3) of FIG. 8, since the trapezoidal groove 202 is cut in the base 201 which is a cast-in bone, the water cooling chambers 204 and 205 formed of the H steel 203 as shown in the cross section BB are as follows. Copper bolts 206 for cooling with a design in which 15 l of water accumulates in the water channel as a measure to prevent the water cooling effect and temporary heating at the time of water stop by maximizing the water channel of the upper water cooling chamber 204 by making the areas of the upper and lower stages different Are contained in one divided tooth receiving segment 200.
The three copper bolts 206 (M30 × P = 2) each contain 14 pieces of 3000G neodymium magnets 207, and the magnetic field lines of the demagnetizing field come out at right angles to the copper bolts 206. When water flows through the magnetic field according to the above law, a minute current is generated. Therefore, the minute current flows from the SS of the side plate to the copper bolt 206 as an ionization current, thereby preventing slime from adhering to the inner walls of the water cooling chambers 204 and 205. On the top surface of the copper bolt 206, a chamber containing 35 to 45% plague silver jar is formed to form a storage chamber. Hi-Cr hot water 1500 ° C to 1550 ° C, and the flux in the plague silver tub works with the mounting case (207, 208) and the brazing that is integrated into one body, and the hot water enters and completes in about 20 seconds.

A cermet TiC chip 210 is attached to the tip of the copper bolt 206 via a copper plate 208 between the clad steels 207 with a copper bolt nut 212.
Since the clad steel 207 has a copper plate 208 in the center and 13 holes 209 of φ20 are opened, hot water is introduced into the holes 209 so as to prevent the removal and the cooling effect of the Hi-Cr cast iron hot water. It is.
Hardened build-up liner 211 (HV-900) is bonded to both sides of the H steel forming the water cooling chambers 204 and 205 to protect the water cooling chambers 204 and 205 of the H steel.
The Hi-Cr cast iron casts a cermet TiC chip 210 with the entire coating according to the present invention. That is, Ni / plating of 5/100 ± 1 / 100mm is applied on the fired film of liquid flux, and the surface is coated with special liquid flux containing glaze, so it does not burn up to 1200 ° C for about 20 seconds, In order to protect the plating flaw, it is brazed when it solidifies near 1200 ° C., but is fixed by two trapezoidal grooves 202 and a hole 209 of φ20-13 that prevent it from coming off.
In the past, the inventor has carried out experiences related to casting with various patents, but the flux developed by the present inventors in the past was not a true flux that can be brazed at 1000 ° C.
That is, the Hi-Cr cast iron stuffed flu is a flu that exhibits an excellent function only when it is cast, not a glaze, not a glaze, and not a heat-resistant brazed flux.
The present inventors finally succeeded by adding research and achievements of long-standing mochi flux.

Application example 3

Application Example 3 is a demon tooth 04 of the water-cooled sinter crusher crusher, and the cutting edge of the disassembly / replacement demon tooth is enlarged and displayed in FIG. .
Normally, in the demon tooth, water flows from three / one water channel on the surface of the shaft 301 to the three water channels in the demon tooth, and the Hi-Cr cast iron of the three devil arm 302 and the crushing portion 303 at the tip thereof. The casting fill 314 is cooled.
Each devil arm 302 has a cooling water channel 311 in the devil tooth base material 312. The demon tooth arm 302 has conventionally used a 100% birch Hi-Cr cast iron rod (welding rod φ12 to φ20) as a cast iron for the crushing portion 303 formed at the tip of the devil tooth base material 312. Heat is injected into the Iseki Seki (SS grid) of SS400 for the method of building up the high hardness of Hs80 ± 5 by putting carbon in the buildup part. It is closer to casting rather than to be built up.
For this reason, the surface of the white birch is cracked in a turtle shell shape and barely held at Iseki.
The cooling effect of [400] SS400 is good, but the casting part is cracked, so the cooling effect is less expected than expected, rotating between 550 ° C. and 650 ° C.
Unlike the denture, the demon teeth rotate, so there is very little slime attachment.
It is because rotation vibration and striking force are added that it is impossible to say that the demon teeth are one year for one year due to the reversal of both teeth. Devil's tooth has a total weight of 40t ± 5t when one set is installed, and replacement once a year is high, so disassembly and assembly costs are high as maintenance costs.
If only the cutting edge can be replaced, the division cost ends at 1/4.
Long life and easy replacement can lead to cost reduction at each steelworks.

In (1) to (3) of FIG. 9, the cast cermet TiC chip 304 is inserted from the top to the bottom along the trapezoidal groove 306 of the cooling copper plate 305 supported by the receiving groove of the base material 312 via the support arm 313. When the placement base is inserted, it is fixed by two M16 bolts 307 and 308 from the rear of the demon tooth base material 312 and the top surface is also pressed and attached to the base material 310 by M16 bolts 309 and 310. . Since the back of the water cooling chamber 311 is machined at the start, it is surely assembled and assembled, but since it always adds to the striking force back, the trapezoidal groove 306 is loose.
Therefore, the heat transfer cement (graphite + water glass) is pressed into the female screw of the bolts 307 and 308 by the pump method (the same principle as grease injection), and leaks from both side tops of the heat transfer cement Tighten the bolt after the appearance. Since water glass blows above 450 ° C, its volume is increased and it adheres at that pressure. Therefore, the exchange method was made possible on site.

Application example 4

Application example 4 is a liner 401 of a swirl chute 400 of a blast furnace ore loaded bellless shown in FIG. 10, and a schematic diagram is shown in (1) to (6) of FIG.
In (1) to (6) of FIG. 10, the turning chute 400 has a U-shaped width of about 1000 m / m, a length of 400 mm, and a height of 1600 mm on the outer periphery of the blast furnace in the order of iron ore, coke, and raw apatite. In addition, it is an apparatus that disperses these 360 ° to a uniform thickness in the blast furnace volume by computer control of the inclination angle. In order to prevent the wear of the liner 401, it has already been placed in the Hi-Cr cast iron 402 on a plurality of surfaces in cross section from the center. Carbide CW403 is cast.
This is a cemented carbide casting method described in the patent No. 5013349 of the inventor, and is 50-52 kg per sheet from a carbide specific gravity of 19.3. Humans do this in exchange. It is very heavy, and it is 20-25kg according to the Industrial Safety and Health Law.
When the liner 401 of the cermet TiC chip 404 cast-in 404 is used, the weight is reduced by 35 to 37 kg (30 to 35%).

The swivel chute 400 is a bell-less main body casing, 405 is a Hi-Cr holding plate, and a cermet TiC chip 404 and a support fin 406 are cast on a Hi-Cr cast iron 402 on the holding plate 405. A long hole 407 is formed in the support fin 406, and hot water flows to the next fin through the long hole 407. This support fin 406 is electroplated with Ni after electroless plating as a whole, and is coated with a heat-resistant flux similar to a cocoon mixed with special flux + glaze, and sand mold 450 ° C. to 500 ° C. The liquid flux boride borofluoride fixes the glaze particles one by one when overheating, covering the thermal shock and heat resistance of Hi-Cr cast iron bath at 1500 ℃ ± 50 ℃, When Hi-Cr cast iron is semi-solidified at a temperature of 1200 ° C. ± 50 ° C.

On the lower surface of the holding plate 405, a countersunk hole 408 of φ22 to φ20 is formed, which prevents the Hi-Cr cast iron 402 from coming off. Because it is a stepped surface that follows the flow of ore, there is no biting of the laminated surface. When the ore is charged, the tip of the chute inlet is balanced at around 476 ° C. in order to receive heat radiation in the blast furnace at 1200 ° C. to 1300 ° C. Although cemented carbide has an indie that it is vulnerable to high-temperature oxidation, it differs from the cemented carbide chip holding HV550 even at 800 ° C. from the high temperature hardness table of FIG. 6 of the cermet TiC chip 404. High wear liner that is light and has high temperature hardness can be made. It is only this flux that can be said to be 100% cast-glued.
The inventor's conventional flux brazing is max. 1000 ° C., and the flux for max. 1550 ° C. is impossible with conventional inorganic borides and borofluorides.

Application example 5

Application Example 5 is a drilling piercer 501 and a die 502 for a special pipe of 13Cr-1Ni for oil drilling shown in FIG. Since the piercer 501 is subjected to high-temperature wear resistance due to the bright holes in the round billet (martinsite steel) of max 1450 ° C, carbides such as TiC, WC, Cr ₂ , C ₇ , VC, Mc, NbC, etc. are formed on the piercer surface by powder plasma. Is piled up with stellite powder as a binder.
Since the oxidation of WC-type and NbC-type starts abruptly when the temperature exceeds 400 ° C., this oxide film serves as a high-temperature lubricant and serves as a piercer.
Conventionally, 4 m / m on one side was the limit due to powder plasma build-up. Therefore, 30 holes per hole was the limit.

In the chemical composition of Hi-Cr cast iron, W → 0.5-1% → W1.5-2%, Nb0.5-1% → Nb → 2.5% -3% and first, the chemical composition is adjusted, Composite carbides are easily made by increasing the carbon from 2.5 to 2.8% to 3 to 3.5%.
Conventionally, it is composed of a combination of a piercer body in which 5 to 6 types of carbide layers are formed on the surface layer with powder plasma of SCM-440 and a special high lead screw that stops the push rod.
The push of the martensitic round bar and the conventional piercer have a water vapor passage hole.
By accelerating the forming of the oxide film by spraying these water vapors during the press-fitting of martensite steel, the oxide film of the carbide oxide film could be quickly formed as a lubricant.
Since the die receives strong impact and friction at the 1400 ° C. ± 50 ° C. round steel extrusion inlet, it is a cast alloy of Ni-Cr high alloy steel even if it is a kind of heat-resistant steel.
When the plasma build-up part is worn at a maximum of 10 m / m, it is turned into a rough die, and the finishing die is always new. For this reason, it is a die that is collected and recast for casting.

FIG. 11 shows a piercer 501 and a dice 502 according to the fifth application example.
The special Hi-Cr cast iron 503 of the piercer 501 of this application example 5 is made up of carbon, W, and Nb in the cast iron, so the amount of WC and NbC is more than twice that of the conventional Hi-Cr cast iron. Yes.
The core metal body 504 for casting the special Hi-Cr cast iron 503 and holding the special Hi-Cr cast iron 503 is a conical structure, and 6 to 8 spiral fins 505 are wound around this core. Carbide tips 506 and cermet TiC tips 507 are alternately assembled on the fin and welded in a spiral shape.
A trapezoidal groove 508 is formed in the lowermost stage of the main body 504, which has a spiral shape to release the compressive stress applied to the cermet TiC chip 507. The entire surface including the core metal body 504 is plated with Ni, coated with a special flux, and the sand mold is heated at 450 ° C. to 500 ° C., and then a special Hi—Cr cast iron 503 is cast. Although not shown, a hole is secured as a water vapor passage hole. With a cermet TiC chip of 15 m / m, the wear resistance is nearly four times that of the conventional piercer with a maximum of 4 m / m for the powder plasma. It can be used as a finishing piercer at the start and can be used as the number 1 or 2 in terms of wear. Therefore, the lifetime is three times longer than that of the conventional piercer.

Thus, by casting the lower WC carbide chip 506 and the upper cermet TiC chip 507 on the surface layer of the piercer body 504, the conventional oxidation resistant films NiO ₂ and CrO ₂ were weak, but the oxidation of WC Since the film and the TiC oxide film become a high lubricant, they have a long life.
Since the cermet TiC chip 507 is completely dissolved at 1500 ° C. ± 50 ° C. and floats as a deoxidizer, the bone fin 504 is SS400, so that the pierced body 504 is recovered and recast. An increase of 1-2% iron results in remelting of the WC cemented carbide tip 506, thus increasing the WC lubricant function. Each time redissolving, W increases to a maximum of 5%.
Since water vapor (H ₂ O ↑) always enters from the lower stage of the die, the surface of the die is forcibly oxidized, and this oxide film acts as a high-temperature lubricant between the pipe and the die, so that wear is kept low. .
Speaking of lubricant, it is oil, but in the world of 1400 ° C ± 50 ° C, it is a solid lubricant, and it is graphite, serpentine (Mg ₃ Si ₂ O (OH) ₄ ), mica (Si ₄ O ₁₀ (OH)) ice. Crystallite (Na ₃ AlF ₆ ) boric acid (H ₃ BO ₃ ) is often used, but because of its low melting point of 1400 ° C ± 50 ° C, it sticks to the outside like a glass or in the case of SUS, graphite has a carburizing action. Therefore, the corrosion resistance may be impaired. A refractory metal oxide film is used as a lubricant.
It became possible to make it at a reduced cost with the recovery chip.

Similarly, the lower die WC carbide tip 521 and the upper cermet TiC tip 522 are alternately arranged on the surface layer of the die 502 and cast with Hi-Cr cast iron 503.
Reference numeral 510 denotes a pipe formed into a pipe shape by the piercer 501 and the die 502.
Since the die 502 is subjected to strong impact and friction at the 1400 ° C. ± 50 ° C. round steel extrusion inlet, it is conventionally a cast alloy of Ni—Cr high alloy steel even though it is a kind of heat resistant steel.
When the surface layer part is worn at a maximum of 10 m / m, it is turned into a rough die, and the finishing die is always new.
Therefore, it is recovered and recast die for castings.
By casting the WC carbide tip 521 and the cermet TiC tip 522 on the surface layer, the conventional oxidation resistant films NiO ₂ and CrO ₂ were weak, but the WC oxide film and the TiC oxide film were made of a high lubricant. Therefore, it has a long life.

Application Example 6

Application Example 6 is a blade of a kneading machine extrusion screw. FIG. 12 shows a cross-sectional view (1) and a longitudinal cross-sectional view (2) of the screw blade 600, and FIG. 13 shows paddle blades 601-1 and 601-. A cross-sectional view (1) and a longitudinal cross-sectional view (2) of a two-part cast-in structure are shown.
The blade 600 of the kneading machine extrusion screw is a kneading machine for collecting dust collected by each electric dust collecting material of each factory such as sintering factory, converter factory, blast furnace factory, topped car dephosphorization silicon decarburization factory, coke factory, etc. Extruded agglomerated.
The blade 600 of the screw shown in FIG. 12 is welded and attached to both ends of the rotating shaft 610 by separating the cast-in portions of the paddle blades 601-1 and 601-2 shown in FIG.
The paddle blades 601-1 and 601-2 are connected in the axial direction of the rotary shaft 610, kneaded with EP ash mixed with tar, and extruded into a φ20 to φ22 die hole at the tip, φ20 to 221 = 25 Make ~ 30 billets. This recovered EP billet is placed on the upper surface of the converter, and helps to prevent hot metal oxidation and smelting, and iron oxide containing 40 to 50% and wrought iron is formed on the upper surface of the converter with the help of Si, Mn, Ca, etc. . It consists of 40 to 50,000 tons of iron per year.
The screw blade 600 is conventionally a Hi-Cr cast iron fillet only at the tip, but it is a SUS cast cast with a precipitation self-hardening of SUS ± ^# 630 because it is difficult to have a wear step.
In this application example, a fin 603 is welded to a metal core 602, and a cermet TiC chip 604 is fixed to a tip of the fin 603 with a bolt 605. After this entire assembly, electrolytic copper plating (1083 ° C. and lower melting point than Ni) is performed. Then, with a small amount of hot water (SUS ± ^# 630), it is cast with a cast iron.
At this time, the special cast flu flux is required. After that, casting with Hi-Cr cast iron 606 is performed.
Since SUS is SUS ± ^# 630 and Hs50 ± 5 with respect to Hi-Cr cast iron Hs65 ± 5, a step is produced between the TiC chip 601 and cast iron cast iron. This step is suitable for screw feeding and enables extrusion with a uniform compression force.
As a result, the life is 4 to 5 times longer than the conventional WC-based buildup.
In addition, the uniform feed leads to prevention of pulsating flow and a long life of 1 year.

Application example 7

Application example 7 is a chute tip hardware 701 shown in FIG. 14 and attached to the head of the stone box 03 of FIG. In order to serve as a natural pool and a temporary pool for the falling sintered ore 900 ° C. ± 100 ° C., the chute tip metal fitting 701 is conventionally M32 bolted with a general Hi-Cr cast iron attached to the head 702, The life of 20 to 30 m / m that wears to the head of the bolt was 0.7 to 1 year.
The worn part of the chute tip metal fitting 701 has a life of 0.7 to 1 year without any hardening on the head of the presser bolt.
FIG. 14 shows an application example 7, in which the head of the bolt 703 is cast with Hi-Cr special cast iron 704 having a head of 20 m / m, and a cermet TiC chip 705 is cast on the L-type head 702 for 2.5 years. Long life of 3 years.

If the L-type head 702 is pressed with the M32 bolt 703 and the stellite casting is made of CW-up Hi-Cr cast iron 704, the service life is certainly tripled.
Prolonging the life of regular repairs is hot in the field, and it is difficult to secure the number of people in the case of regular repairs under the worst conditions and severely crushed scaffolds.
It is the place where the longevity is the best, and the cermet TiC chip 705 retains hardness of HV600 or higher even at 800 ° C. three times that of the Hi-Cr cast iron single structure.

  In order to exhibit the above-described excellent operational effects and application effects, the present invention contributes greatly, such as making it possible to realize a significant increase in the life of heat-resistant and / or wear-resistant means in the industrial industry such as iron-related businesses and industrial equipment. There is something.

102, 210, 304, 404, 601, 522, 507, 705: Cermet TiC chip 100 subjected to surface coating treatment of the present invention 100: Tooth receiving of a water-cooled sintered ore crusher 200: Tooth-receiving segment 302: Water-cooled sintering Demon tooth arm 401 of pulverizing crusher 401: turning chute 400 liner 502: die 504: piercer body 601-1, 601-2: paddle blade 701: chute tip hardware

The present invention relates to a high chromium cast iron cast-in method for cermet TIC chips.

Cermet TIC chips as well as carbide chips (WC) are also collected by machining manufacturers as machining tools, but about half are cermet chips, but 100% are discarded due to the higher cost of regeneration. .
Carbide tips are mainly reused because they are mainly expensive W, Co, and Ni. However, even if the cermet TIC chip is disassembled, it is still Ti and C. Very expensive. Because there are a lot on the earth, it is cheaper and has less merit for reproduction. It is not utilized because of the disposal cost of chip makers.

There are various methods of using a combination of cemented carbide in high chrome, ceramics on high chrome casting, or combination with brazing or stat fastening, but most are extensions of wear countermeasures, and there are also various construction methods. All of these construction processes are complicated and complicated, and are all expensive. The use of a cermet TIC chip is a material close to zero.

The biggest drawback was that the cermet TiC chip cast was weak against the shrinkage stress when the high chromium cast iron was cooled and hardened. This is due to the fact that the cast cermet TIC chip is disjointed and the specific gravity is light, so that it breaks and rises.
The cermet TIC tip has a square shape as a cutting tip, and if it can be cast in a place where it is necessary for high chrome cast iron , it is resistant to high temperature oxidation, which is a weak point of carbide and gold, so it wears at high temperature. It is the most suitable material for demon teeth and dentures of sintering equipment.

It is impossible to make a cermet TIC chip that can withstand shrinkage stress. The countermeasure is to reduce the shrinkage stress on the cermet TIC chip by reducing the cast-in stress.
The possible combination of cast flux and ten clay is a kind of firewood.
High chromium cast iron has a limit of 1500 ° C. ± 50 ° C., and conventional liquid flux has a limit of 1000 ° C. ± 100 ° C. In this case, Ni plating at 1455 ° C would not be a flaw, so the flux could not be tolerated.

So, the role of flux as a traditional mochi is
1. It has the effect of removing and cleaning the oxide on the surface of the material.
2. Have activity in the brazing temperature range.
3. To have the effect of promoting the fluidity and spreadability of cocoons.
This is the condition of the date that is visible with the atmosphere.
Cast walnuts are swallowed by high- chrome cast iron hot water at 1450 ° C ± 50 ° C in an instant, close to a kind of rigging, and exposed to high heat that is not good enough. This rapid heating and overheating causes cracks in the TiC, and when the high chromium cast iron is gradually cooled, it cracks and rises before 1450 ° C → 1200 ° C ± 50 ° C shrinkage stress.
This is a traditional flux, and this extreme temperature range is about 20 seconds.

Although the rapid heat load is not visible, it has been until now that the cermet TIC chip has been cracked and crushed when cooled and hardened or polished. As a measure to absorb this stress, it was the development of a flux that sticks in a foam state up to 1200 ° C.琺 瑯 is max1000 ℃. The pottery is 1200 ℃ ~ 1500 ℃.
This is the development of flux with both temperature conditions.
It was a mixture of feldspar and meteorite that acted as a flux in porcelain clay.
Calorie calculation is calculated as 20 seconds to cool from 1550 ° C to 1200 ° C, so if you make a pot that can withstand 1200 ° C, it will contain lithium carbonate and barium carbonate that absorb temperature up and elongation in flux In this way, the foamy flux absorbs explosive impact and heat up to 1200 ℃, and the flux itself becomes liquid glass at high temperature, and can withstand the heat and shrinkage stress by sticking to the surface of the cermet TIC chip. Proved.

Conventional high- chromium cast iron has been used mainly in places with normal temperature wear. It was a 100% anti-wear liner with a maximum human weight of 20kg. If you want to extend your life, increase the wall thickness. Thicken becomes heavier. Because it exceeds the 20kg wall, the cemented carbide will become heavier.
The cermet TIC chip has a low specific gravity and can be easily made as a standard liner. However, it was not marketable. This is because there was no optimal flux in the cast.

Japanese Patent Laid-Open No. 2001-96182 "Long-life toothing for sinter ore crushing by cast-iron brazing method" Japanese Patent Application Laid-Open No. 2003-71556 “Method for manufacturing working member for high-temperature treatment” Japanese Laid-Open Patent Publication No. 2012-86225 “Cemented carbide casting method” Japanese Patent Application Laid-Open No. 2010-100441 “Liquid flux and its manufacturing apparatus” Japanese Patent Application Laid-Open Publication No. 2015-30451 “Casting method with cast iron and silver iron”

Next, problems of the invention introduced in each of the above patent documents will be described.
1. Problems of the cast-in brazing method introduced in Patent Document-1 Assembling by alternately sandwiching the cemented carbide chip WC and the cermet TIC chip, relieving the cast-in shrinkage stress, and flux is an application of solid flux, 400 ° C The module is assembled by temporary baking at ˜500 ° C., but the biggest point is that after removing the vacuum thin film on the surface of the WC and cermet TIC chip, electroless copper plating is used to make a brazed ridge.
The maximum flux is 1000 ° C and 100% brazing cannot be expected, but it has been somewhat successful in extending the life of sinter ore grinding teeth and teeth.
Stress support by WC and TiC alternate castings has been successful.

2. Problem of manufacturing method of working member for high-temperature material treatment introduced in Patent Document-2 By impregnating the thermal spray surface with liquid flux, it grows in the form of foam and flux and relieves cast-up shrinkage stress. The vacuum thin film removal of the cermet TIC chip is difficult.
Since the liquid flux is inorganic (boric acid H3BO3), (borax NA ₂ B ₄ O ₇ · 1OH ₂ O), (KF), (NaF), (KBF ₄ ), etc. , it is up to 1000 ° C.
The question remains whether it can withstand high- chromium cast iron water at 1450 ℃ ± 50 ℃ for 20 seconds.
Since the brazing material is thermally sprayed, an oxide film may be stretched, and the mixed material of brazing material and oxide cannot be said to be 100% brazing material.

3. Problems of the cast-in-metal method of cemented carbide introduced in Patent Document-3 A liquid flux that can be applied to electroless plating without removing the vacuum thin film on the surface of the cemented carbide chip (WC) and cermet TIC chip. . The principle of the Calval battery is applied to the metal ions by etching the thin film layer on the surface of the cermet TIC chip with a strong PH-1 fluoride containing metal ions such as copper borofluoride (CuBF ₄ ) in a conventional liquid flux. However, max1000 ° C is the limit, and it is difficult to cast only a single cermet TIC chip, so it is a combined assembly casting of WC and cermet TIC chip.

4). Problems of liquid flux and its manufacturing apparatus introduced in Patent Document-4 The inorganic substances (boric acid H ₃ BO ₃ ), (borax NA ₂ B ₄ O ₇ · 1OH ₂ O), (KF), (NaF), (KBF ₄ ) etc.) is a liquid flux in which over 30% is dissolved in methanol in a strong magnetic field. This liquid flux is limited to max1000 ℃.

5. The problem of the method of soldering with a silver-plated silver brazing method introduced in Patent Document-5 By laminating a single plating Zn, Ag, Cu one after another, the porous surface of the three-layer plating layer is impregnated with liquid flux. Make a silver candy with cast-in heat, and braze it with little cast-in heat. This is a cast-in method.

The flux developments of the above-mentioned patent documents 1 to 5 were all developed by the present inventor Tetsuo Harada, and were also researched and developed after knowing the advantages and disadvantages of cast-in.
Thus, it is pulverized where it is surely eaten, such as a pump casing other than high chrome cast iron , and cast into a SUS cast as Ni-B plating on particles of cermet TIC chip as composite plating. At this time, it is necessary to coat each TiC particle 50-100 mesh particle with flux, and the conventional liquid flux contains nickel borofluoride (NiBF ₄ ). I think it was because of 100% spherical coating for one.
Also, because it is light, it used the property of floating and gathering in one place. However, as a cermet TIC chip having one angle, the flux amount is small, so it floats first with heat resistance. A particle of 3g or more is impossible.

Thus, conventionally, in order to join the cermet TIC chip and the high chrome cast iron, the surface of the cermet TIC chip is coated with the brazing material. For this purpose, the vacuum coating thin film is previously removed from the cermet TIC chip surface. In addition, a complicated process such as re-plating or spraying after removing the thin film is necessary.

The present invention provides a high chromium cast iron cast-out method for a cermet TiC chip that realizes brazing joining by the Kirkendell effect without removing the vacuum coating thin film between the cermet TIC chip and the high chrome cast iron .

Means to solve the problem

The present invention fulfills the above-mentioned problems, and features of technical means characterized by the features are as follows 1) to 3).
1) The surface of the cermet TIC chip whose surface is coated with vacuum thin film is degreased and pickled and washed, then electroless copper plating or electroless Ni plating, and further electric Ni-B plating, and then the clay. Contains liquid fluoride produced by dissolving all of potassium fluoride, acidic potassium fluoride, boric acid, borax and potassium borofluoride in all solvents of alcohol, acetone, glycerin and ethylene glycol, followed by heating. Then, a surface treatment is completed by forming a fired film of the plating and flux, and thereafter casting with high chromium cast iron.

2) The high chrome cast iron cast-in method for a cermet TIC chip according to 1) above, wherein the immersion time in the liquid flux is 10 to 15 seconds.

3) The thickness of the electroless copper plating and the electric Ni-B plating or the thickness of the electroless Ni plating and the electric Ni-B plating is 1/100 to 3/100 mm. A high chrome cast iron cast-out method for a cermet TIC chip according to claim 1 .

Invention effect

The present invention as described above is a simple and inexpensive means, for example, a pulverized coal injection pipe, a blast furnace bell-less raw material charging / distributing chute arm, a sinter ore crushing equipment demon tooth and a receiver. Applicable to all high chrome cast iron cast structures that require wear resistance and / or heat resistance, such as teeth, pistons and dies of kneading vacuum extrusion molding machines, hot-pipe piercers and dies for steel pipes, etc. It is advantageously realized that the extension is ten times the conventional one.

The technical conditions and the operational effects (: technical significance) resulting from the above-described features of the present invention will be described in detail below.
Conventionally, the vacuum-cured film TiN.TiCr.TiCrN etc. attached to the surface of the cermet TiC chip has been forcibly removed by a strong alkali reaction because no electroless plating is attached. It is heated with a loadable soda solution (NaOH-PH-12) at a maximum of 100 ° C for 30 to 40 minutes, and then hydrogen peroxide (H ₂ O ₂ ) is dispersed at a maximum of 20% 3-4 times and charged. It was removed with foam (2H ↑). 100% could not be removed at one time, and this operation was performed 2-3 times to remove the 100% vacuum film. It is a time, expense and risky work. As the next step, it was immersed in liquid flux without being affected by this process, and then removed from the liquid flux and ignited and baked copper borofluoride (CuBF ₄ ), enabling electroless copper plating.

The conventional liquid flux is 70-80% , 20-30% of inorganic material is used as glaze, copper borofluoride (CuBF ₄ ) or nickel borofluoride (NiBF ₄ ) is used, and glaze is added. Lithium oxide (Li ₂ O), which is an adhesive to be joined, is dissolved in liquid flux by max5%.
Conventionally, the electroless plating has not been considered to be an alloy mainly composed of two elements of Ni + P or Ni + B of a single copper plating or Kanizen plating. When the liquid flux is injected into the surface of the porous plating in combination of three elements of zinc (Zu) + copper (Cu) + silver (Ag) and heated, the melting point drops. This makes it possible to make a ternary silver candy at 650 ° C to 850 ° C. In addition, copper + nickel → silver silver (900 ° C) can be made.
It is suitable for low temperature brazing by reducing the hot water of high chrome cast iron because it can make quaternary silver bars such as Cu + Mu + Ag + Ni →.

It becomes a 1200 ℃ ± 50 ℃ flux which is similar to a kind of glaze that combines the advantages of liquid flux with the glaze that puts 30% porcelain into 70% of traditional liquid flux.
Potassium as china clay feldspar _{(K 2 O.Al 2 O 3 .6H} 2 O-1400 ℃ ± 50 ℃) kaolinite glass with improved heat resistance _{(Al 2 O 3 .SiO 2 ·} 2H2O-1600 ℃) that enters Quality flux is born.
Therefore, the conventional heat flux of max1000 ° C improved to 1200 ° C-1300 ° C and became a preferred cast-in flux with a high chromium cast iron casting temperature of 1450 ° C ± 50 ° C.
Heat resistance refers to about 20 seconds up to 1200 ° C where high- chromium cast iron water at 1450 ° C ± 50 ° C becomes semi- solid . In this 20-second period, flux can be brazed with brazing material and high- chrome cast iron only when it is first made into 100% liquid glass that turns into a liquid glass from a foamed and semi-jelly foam.
When the cermet TIC chip is brazed in high chrome cast iron , the melting point can be lowered by the alkali metal or alkaline earth metal entering the glass.
The purpose of the glaze is to seal against the soil, and it has been designed to form a water tank at 1220 ° C or higher, sticking to the soil and vitrifying it, but instead of the soil, the cermet TIC chip is a heat-resistant soil. The purpose is the same.
It is flux if the cermet surface is cleaned and the surface tension is removed.
This idea was the fusion of liquid flux and glaze.

The cermet TIC chip is mainly formed by combining small objects when a machined cutting chip is reused to form one segment (structure).
The cermet TIC chip has holes of φ3 ~ φ5 for mounting on the cutting table.
The electroless copper-plated or electroless Ni-plated material having a thickness of 1/100 to 5/100 mm on the entire surface of the cermet TIC chip is fixed to a mounting plate with bolts M3 to M5 by using nuts M3 to M5. Thereafter, the segments Toritsui the cermet TiC tip turn, the electrical Ni-B plating of 5 / 100~10 / 100 mm.
As a feature of the electric Ni-B plating, since the electric density is concentrated on the corner surface, the four corner surfaces of the cermet TIC chip are plated with a thickness of 10/100 to 15/100 mm . This plating is used as a brazing material.
Because you have electroless plating of advance the cermet TiC chip, the electroplating is closely 100%. As a result, high chrome cast iron can be cast into a segment in which a variety of cermet TIC chips are incorporated, so that special shaped demon teeth, tooth receiving, pipe opening piercers, blast furnace bellless liners, large bell liners, It has made it possible to extend the service life of conventional large-size blower lift blades, etc.

The brazing material for the high chrome cast iron gurgurumi hot water is made of a material that is close to the linear expansion coefficient and the melting point is lowered, and the brazing is performed with a laminated plating.
Mn → 22 × 10-6 Ag → 19.7 × 10-6 Cu → 16.5 × 10-6 Ni → 13.3 × 10-6
Fe → 11.7 × 10-6 Zu → 39.7 × 10-6 Cd → 29.8 × 10-6 Pb → 29.3 × 10-6
Al → 23.9 × 10-6 Ir → 33 × 10-6 Sn → 23 × 10-6
The white type has a low melting point and a large linear expansion coefficient, but the elements that can be used as cast high chrome cast iron are up to Mn.Ag.Cu.Ni.Zn.
The present invention is a technique for producing a eutectic alloy with a multilayer plating for the purpose of alloying and using it as a brazing material. Because it is porous even if it is called multi-layer plating, it removes the surface tension of the brazing that dissolves in hot water of 1450 ° C ± 50 ° C by pooling in the porous surface when impregnated with liquid flux, Make the appendix successful.

The maximum stress of high chromium cast iron is generated for about 20 seconds when the temperature drops from 1450 ° C ± 50 ° C to 1200 ° C. High chrome cast iron is poured from the gate, and the hot water rises up to the hot water combined use gate until the surface is wrinkled with an oxide film.
The calculation is 19 seconds, but if the 20 seconds are withstood, the cermet TIC chip is not broken and the brazing is completed. Therefore, it is a condition that it can be applied uniformly with a flux that can withstand up to max 1200 ℃.
A simple idea is to burn the flux thickly. In that sense, firewood can be baked thicker than 1m / m. Seto and pottery [glaze]. In addition, it has a function of preventing oxidation and removing surface tension against the base brazing material (Ni + B) (Ni + Cu) (Cu + Ag) (Cu + Mu).
The crab bites the base and does not flow and is close to the flax flux, but it is max1000 ° C, which is one step now.
There is currently no 1200 ° C salmon in Japan. In consideration of the other party's distortion prevention, the maximum limit is 800 ° C, and there are few signs, containers, and heat storage plates (for air heaters). Patent documents 1-5 are also max1000 degreeC, and have only improved only 200 degreeC.

秞 The starting point of drug formulation is feldspar and porcelain, which can be blended up to max 1600 ° C, but usually as a heat source at 1200 ° C to 1300 ° C, matsutake mushroom, coal, heavy oil, kerosene, This is a good temperature for gas and electricity.
Although it is the temperature of cast flux, baked goods contain charcoal to lower the melting point and have properties other than ash, but are not necessary for flux.
Representative of clay, potassium feldspar _{(K 2 O, Al 2 O} 3 · 1OH 2 O), kaolinite _{(Al 2 O 3, SiO 2} · 2H 2 O) is. These two are made 70-80%, and the remaining 20% is made of limestone, magsite (MgO ₂ ) petalite (lithium feldspar) barium carbonate, ash 秞
Liquid flux 70% + 秞 30% drug fusion to make cast flux.
These feldspars, meteorites, coal stones, and magsites are common ceramics that do not dissolve in 100% alcohol 秞 the role of the drug water is the liquid flux, and the drug is in the individual 秞 What remains is a pottery of general pottery, a liquid flux of the same principle.

Potassium feldspar _{(K 2 O, Al 2 O} 3, 6SiO 2) → 1220 ℃ soda feldspar _{(NaO 2, Al 2 O 3} , 6SiO 2) → 1100 ℃ lithium feldspar _{(Li 2 O, Al 2 O} 3, 2H 2 O) → 1350 ℃
Dolomite (CaMg (CO ₃ ) 2) → 1010 ℃ Barium carbonate (BaCO ₃ ) → 1740 ℃
Lithium carbonate (Li ₂ Co ₃ ) → 1500 ℃ Kaolinite (Al ₂ Si ₂ O ₅ (OH) 4) → 950 ℃
Cryolite (Na ₃ AlF ₆ ) → 1020 ℃
It is a mineral that seems to be usable in flux. In any case, 1200 ° C is blended in the calculation. Table 1 shows the formulation examples.

Potassium feldspar is suitable for flux because of its wide firing temperature and high glassy viscosity, but sodium feldspar is as low as 1100 ° C. Use as raw material.
Lithium carbonate is necessary to contain the max 5% of barium carbonate because it suppresses the sudden swelling of the medicine.

The glaze containing K.Na has a large expansion rate, so it is easy to break, so it is hard to break into lithium and barium. This is because a large amount of Na is contained in the liquid flux. Therefore, 2 liquids of max5% are put in 1 liquid main component.
Bubbles are generated by adding an alkaline earth metal to the carbonate compound of the gas generant as carbon dioxide gas as strontium carbonate (SrCO ₃ ), barium carbonate (BaCO ₃ ), calcium carbonate (CaCO ₃ ), lithium carbonate (LiCO ₃ ) But it prevents the flux from falling off.
It has a flux-like role with a mixture of 30% glaze to 70% liquid flux as a flux, and it rises greatly in a sticky shape by heating by removing moisture in the sand mold by temporarily heating the mold (sand mold) at 400 ° C to 500 ° C. By suppressing the growth of bubbles in the glassy flux, the bubbles absorb the thermal shock of high- chromium cast iron at a temperature of 1450 ° C ± 50 ° C, and the bubbles themselves become glassy at 1200 ° C ± 50 ° C. In this way, the plating flaws on the surface of the cermet TIC chip are protected from oxidation, the surface tension of the hot water is removed, and the role of brazing flux is played, which helps the casting of high chromium cast iron .

As a liquid flux used in the present invention, chemical components in a liquid flux of max. 1000 ° C. produced by “Liquid flux and its manufacturing apparatus” introduced in Japanese Patent Application Laid-Open No. 2010-10041 are shown as an example below.
Each inorganic reagent is a ratio (weight WT%) shown in 100%.
1) Potassium fluoride (KF): 20WT%
2) Acidic potassium fluoride (KHF ₂ ): 20 WT%
3) Boric acid (H ₃ BO ₃ ): 40 WT%
4) Borax (Na ₂ B ₄ O ₇ · 1OH ₂ O): 10 WT%
5) Potassium borofluoride (KBF ₄ ): 10 WT%
However, the liquid flux is the Haikuromu cast iron water 1450 ° C. ± 50 ° C. is impossible alone. Therefore it is a flux with 30% pottery glaze in 70% liquid flux. The inventors have completed the development of flux in a carburizing furnace at 1000 ° C. or higher according to Japanese Patent Laid-Open No. 2012-055921 (carburizing brazing method).

It is easy to simply raise the temperature, but the role of flux is as described above, but no flux containing glaze has been made so far.
Lithium silicate (SiO ₂ / Li ₂ O) is a kind of water glass, but it also acts as a flux. It doesn't decompose or dissolve up to 1000 ° C, and it becomes a glaze adhesive even if it is made of lithia glass and self-dissolves in liquid flux.
The thermal reaction between liquid flux and glaze creates a kind of soda glass + α.
The components of this soda glass + α are SiO ₂ : 70-73%, Na ₂ O · K ₂ O: 10-15%, CaO: 5-8%, B ₂ O ₃ : 2-3%, Al ₂ O ₃ : 0.5-2%, LiO: 0.5-1%, CaF: 0.5-1%.
These multi-component glassy functions cause the formation of a network oxide, and vitrification causes a temperature drop in the vicinity of 1200 ° C to 1300 ° C.
When a material near CaO (calcium oxide: 1550 ° C) Al ₂ O ₃ (aluminum oxide: 1600 ° C) is vitrified in the same way as metal alloying, it falls to 1200 ° C to 1300 ° C.
By combining with SiO ₂ , B ₂ O ₃ , P ₂ O _5, etc., when combined with Na ₂ O · K ₂ O, the following equation (1) is obtained.

Such ion separation leads to vitrification that lowers the melting point.
The addition of these glazes into the liquid flux creates a multi-functional glass. When the fluorine in the fluoride enters the glass and changes to calcium fluoride, it performs a cleaning action. Lithium oxide Li ₂ O is forced to decompose and jump out as Li ions to improve the flow.

Inventors have also in Japanese Patent Application No. 2004-245836 blast furnace溶滓trough,硼弗copper (CuBF ₄ -30%) Katsura sodium fluoride (NaSiF ₆ -5%) borax (Na ₂ B ₄ O ₇ .1OH ₂ O-15%) Sodium bromide (NaBr-5%) Boric acid (H ₃ BO ₃ -13%) Cesium carbonate (CsCO ₃ -2%) Boron oxide (B ₂ O ₃ -30%) in blast furnace toys There is a track record of brazing pipes in casting water at 1450 ° C ± 50 ° C of FCD-450 with this water-cooled pipe casting.
Copper borofluoride (CuBF ₄ -30%), which becomes a cocoon, is made into a copper cocoon as a copper cocoon at around 1100 ° C with 1450 ° C heat.
Since cermet TIC chips are pre-plated in small quantities, there is a risk of burning in an instant. For example, each segment that holds the whole cermet is pre-plated, and the liquid flux containing the porcelain clay is dipped and adhered to it before heating. As a result, the high- chrome cast iron water was heat-resistant to 1450 ℃ ± 50 ℃ and the copper rod was joined.

Next, the significance of the main technical conditions of the present invention will be described.
The recovered cermet TiC chip as Guru No method cast in Haikuromu cast iron, conventionally, plating not to remove the vacuum thin cermet TiC chip surface was required coating film removing step for difficulties, the as electroless plating and After the electroplating , the metal body in the flux is baked on the vacuum thin film by immersing it in a liquid flux developed by the present inventor (Tetsuo Harada) and igniting it and burning it.

Since the electroless plating is a brazing material, copper, nickel boron, silver, etc. are suitable for temperature, but it is an alloy brazing by combining two or more of zinc and copper, copper and silver, and copper and nickel. It is also possible to make a metal bowl with a low melting point.
Reducing the amount of hot water can cover the lack of heat of melting cast iron water.
The cast-in brazing is completed at 700 ° C to 1000 ° C.

Thus, the liquid flux is obtained by dissolving 30% of the next inorganic substance in 70% methanol. Boric acid (H ₃ BO _3), borax _{(Na 2 B 4 O 7 .1OH} 2 O), potassium borofluoride (KBF _4), all borofluoride sodium fluoride (NaF), potassium fluoride (KF) It contains copper (CuCBF ₄ ) or borofluoride nickel (NiCBF ₄ ), and contains a fluoride ion metal in a liquid flux.

The liquid flux covering after electroless plating and electroplating, said the clay close further enamel in the liquid flux components flux70% + 30% China clay (potassium feldspar _{K 2 O.Al 2 O 3 .6H 2} O) ( Kaori Night Al ₂ O ₃ .SiO ₂ 2H ₂ O) is placed in a 100% solution, soaked in the cast-in segment with the cermet TIC chip attached, and fired to expel 100% alcohol and moisture to temporarily put the clay. Bake.

Temporarily baked cermet TIC chips are placed in a sand mold and reheated at 450 ° C. to 500 ° C. in the form of a mold to secondarily bake liquid flux.
In this secondary baking, K.Na.Li.B or the like in the liquid flux is formed into a low-temperature glass and is blown up on the foam and coated on the plating layer on the surface of the cermet TIC chip segment.
It took about 20 seconds until the foam became 100% glassy, but during that time, it was possible to braze high-chromium cast iron to protect the plating as a flux from oxidation and remove the surface tension.

That is, as described above, the cermet TIC chip fixes the electroless plated object once to the attachment fin. One unit attached to the fin is called a module segment, and this module segment material is assembled by welding at SS400, which is degreased.
The electroless plating completed segment is assembled, and the liquid flux containing the porcelain clay is dipped, adhered and heated and baked on the one that has been electroplated once more , and then cast with high chromium cast iron .
As a feature of plating, the corners are thick. 1 / 100mm → 5 / 100mm thickness.
The second Ni plating is the above-mentioned electric Ni-B plating, so that the TiC plating should be thick.
In order to electro-Ni-B plating, it is 100% after assembly and needs to be conductive. This is why each single item is electroless in the pretreatment step.

For the module segment, single copper plating 1083 ° C, single nickel 1455 ° C, single silver 960 ° C, single manganese 1245 ° C, but the temperature is also high, but the plating metal Cu + Ni → cupro plating 1000 ° C ~ 1050 ° C, Cu + Ag → Binary silver solder 890 ℃ ~ 900 ℃, Cu + Mu → 1000 ℃ ~ 1100 ℃ Lowering the melting point as a binary steel, enabling alloy brazing.
As a result, the linear expansion coefficient is kept as high as possible between the high chromium cast iron side and the cast-in material side.
Iron SS400 → 11.7 × 10-6, high chrome cast iron 10 × 10-6, cermet 8.2 × 10-6, copper 17.6 × 10-6, Ni → 13.3 × 10-6, cue pro (Cu-50 vs. Ni-50) 15.4 × 10-6, Cu + Ag → 18.6 × 10-6, Cu + Mu → 19.8 × 10-6, The plating side is always high and it becomes a cushion.

Correlation diagram of alkali and silica to confirm how to burn Graph showing the refractoriness of a mixture of potassium feldspar and albite The experiential value is replaced with the calculated value as a glaze to confirm the melting method in the correlation diagram of alumina and silica. The graph which shows an example of the high temperature hardness of various weld metals. It is a figure which shows the side cross-sectional outline | summary of the sintered ore crushing equipment of the sintering factory of the iron mill introduced in the application example 1. FIG. Longitudinal sectional view (1) of a single tooth receiving of the sintered ore crushing equipment introduced in Application Example 1, and a longitudinal sectional view in which the main part of the receiving tooth is casted with high chromium cast iron with a cermet TIC ( 2) Cross-sectional view (3) of the result of casting with high- chromium cast iron by the method of the present invention. An application example 2, longitudinal section of the divided受歯segments other受歯example of the sintered ore crushing equipment (1), the state's glove do cast in Haikuromu iron cermet TiC chip according to the process of the present invention by the same example受歯FIG. 2 is a horizontal cross-sectional view (2) and a vertical cross-sectional view (3) thereof. It is the example 3 of application, and is the longitudinal cross-sectional explanatory drawing (1), the side cross-sectional explanatory drawing (2), and a cross-sectional view (3) which show the tip structure of the water-cooled demon tooth of the said sintered ore crushing equipment. Side view (1), perspective view (2), perspective view (2), cross-sectional view from arrow CC of the blast furnace bellless ore charging equipment introduced in Application Example 4 (2) ) Is a longitudinal sectional view (4) from the arrow DD, a transverse sectional view (5) and a longitudinal section (6) of the liner of the chute. It is an application example 5 and shows a longitudinal cross-sectional structure of a drilled steel pipe piercer and die for forming a special pipe of 13Cr-1Ni for oil drilling. It is the application example 6 and is the cross-sectional view (1) and the longitudinal cross-sectional view (2) of the blades of the kneading extrusion screw for the dust agglomerate collected by the electric dust collector or the like. FIG. 12 is a transverse sectional view (1) and a longitudinal sectional view (2) showing a cast-in structure of a paddle blade of a screw blade for kneading extrusion shown in FIG. It is application example 6 and is a cross-sectional explanatory view of a chute tip hardware mounted on the head of the tone box of the sintered ore crushing equipment introduced in application example 1. FIG.

Next, the form for implementing this invention and the application examples 1-7 of the cermet TIC chip | tip of this invention are demonstrated in detail.
If you are going to make a ternary silver candy with multi-layer plating, Zu (30%) Ag (40%) Cu (30%), Zu 2/100 Ag 4/100 Cu 2/100 Total 6 / 100m / m It is possible to make by electric thick plating, and the plated surface has uniform pinholes. Heating by putting liquid flux in this pinhole makes the plating layer eutectic alloy by the Kirkendle effect and can produce silver glaze. In the case of complex shape welding, the flow of wrinkles due to temperature distribution flows in the higher direction, so it is placed in advance. With this same principle, 100% plating is possible where the plating solution flows even in various complex shaped segments.
Brazing with high melting heat of 1450 ° C ± 50 ° C of high chromium cast iron , or Cu as a cast iron brazing -1083 ° C (Ni + P: 950 ° C ± 50 ° C because Ni cannot be used at 1455 ° C) Ni + B-1000 ℃ ± 50 ℃)
The high-chromium cast iron is brazed at around 1200 ° C, and in the case of silver cast walnuts, it is necessary to take measures at 1200 ° C if the small item (max 5kg) is 10kg or more.
Liquid flux is a solution of ordinary brazed flux in alcohol in a strong magnetic field of 30% to 40%. Boric acid (H ₃ BO ₃ -180 ° C to 800 ° C) Borax (Na ₂ B ₄ O ₇ · 1OH ₂ O-740 ° C to 1000 ° C) Potassium fluoride (KF-800 ° C to 1000 ° C) Sodium fluoride (NaF-650 ° C to 750 ° C) Potassium borofluoride (KBF ₄ -450 ° C to 600 ° C) Boride and fluoride Since it was aimed at 450 ° C to 1000 ° C with a combination of chemicals, exposure to high-chromium cast iron 1450 ° C ± 50 ° C for 20 seconds will burn, so you can expect only an instantaneous effect. Table 2 shows a composition table of glaze raw materials for alumina (Al ₂ O ₃ ) and silica (SiO ₂ ) considering that it can withstand max 1600 ° C for a moment .

Table 3 shows the molecular weight (formula weight) of each component.

100% This like glaze out in blending ratio calculated molar the 1180 ° C. between to 1300 ° C. is potassium feldspar _{-K 2 O.Al 2 O 3 .6H 2} O soda feldspar -Na ₂ O.Al ₂ O ₃ .2H ₂ O two but is only applied is Al ₂ O ₃ in a ratio of K and NA that reference to FIG. Change freely.
And because it contains the elements K and Na as flux, just adding these two will increase the heat resistance, but will not dissolve 100% in the liquid flux.
While the liquid flux was adhering these glazes up to a maximum of 1000 ° C, these glazes made a heat-resistant seal, allowing casting.

Table 4 shows Fukushima feldspar (80 g), synthetic earth ash (20 g) and kaolin (10 g) as an example of glaze on the surface of soil as a [wax medicine].

Table 5 shows a composition table of main glaze raw materials.

(Outside the analysis in Table 5 are components lost by heat.)
Table 6 shows the results of determining the number of moles of each component based on the correlation diagram of alumina and silica for confirming the melting method shown in FIG.

The glaze having a blending ratio of 110 g is 1.52 mol. 10g is the burning consumption.

As shown in Table 7, the calculated number of moles of each component is grouped according to [alkali] [alumina] [silica], and the number of moles of alkali is added.

Table 8 shows the results of aligning the numerical values of the other components (alkali and silica) so that the total number of alkali components is 1 by dividing each component by the total number of alkali components: 0.3.

FIG. 3 shows an empirical value replaced with a calculated value as a glaze for confirming the melting method in the correlation diagram of alumina and silica.
The point V at which alumina-0.6 becomes silica-3.5 is the optimum condition for stability as a glaze.

There are many common elements to combine drug glaze and liquid flux, but liquid flux is saturated with flux that is forcibly dissolved about 30% in a strong magnetic field. Can not. The liquid flux is stuck to each glaze particle 360 °, which exerts a force on the wettability of the chip surface, and a slurry of 30% glaze liquid flux 70% on the segment incorporating the entire chip Soaking in a chemical solution, check the coating with [Wettability] on the whole, turn on the fire, and burn 100% of the alcohol. This is the completion of the segment with flux + glaze.
The whole white-baked segment is put in a sand mold, and the whole is further baked at 450 ° C. ± 50 ° C. to remove moisture in the sand in the mold.
The glaze particles temporarily tempered by the flux are now swollen in a foam form due to the semi-dissolution of boric acid (H ₃ BO ₃ ) in the flux, and fix the glaze particles in the tick.
Because the volume increases by about 30%, the flux is porous. When melted high chromium cast iron at 1450 ° C ± 50 ° C flows here, the momentary expansion of the cermet TIC chip due to thermal stress leads to cracking. , I become glassy and [Wettability] is born
The flux stuck to the glass liquid protects the plating on the surface of the cermet TIC chip from oxidation and removes the surface tension, thereby brazing the high chromium cast iron and the cermet TIC chip.

The conventional liquid flux was achieved by placing ceramic glaze freely from 1450 ° C to 1600 ° C with respect to max1000 ° C.
It is a flux that is very similar to moth. The conventional soot is also raised to max1000 ° C by adding several percent of zirconia oxide, alumina oxide and silicon oxide.
Although there are no major changes from the Meiji era to the home pan, frying pan, and bathtub, it is a good place for the cocoon, but it is gradually declining.
For heat exchangers that have increased heat resistance for the purpose of stainless steel + α with respect to the base iron and castings, there is no one with a temperature of 1450 ° C to 1600 ° C, although heat-resistant soot is born.
When it becomes a 1 million KW-class thermal power plant as a heat storage plate of a heat exchanger, a 50t-60t primary low-temperature side heat storage plate is baked with cobalt oxide coated soot on SUS304. It is a countermeasure, and the combustion air is warmed from the exhaust heat as an air heater of 400 ℃ ~ 500 ℃. Prevents porosity and improves corrosion resistance and heat resistance.
This liquid flux + glaze combination can also be used as a substitute for acupuncture.

Inventor Tetsuo Harada et al. In the invention [Coating Material and Casting Method] introduced in Japanese Patent Publication No. 2013-035017 pre-applying liquid flux in a sand mold and baking the mold at 450 ° C to 550 ° C for moisture. Unsaturated oleic acid (outside furan) or chlorinated organic material (anilic acid) that hardens sand as a method to prevent reabsorption of hydrogen gas by sealing each sand particle with liquid flux when skipping Suppresses absorption when re-disassembles.
The mold is pre-applied with flux on the entire floor surface, ignited to improve the sand mold and improve the sealing property, and the segments are incorporated and calcined at 450 ° C to 550 ° C.
In case of 100% sand mold for casting, the main component used for the coating agent is graphite + boric acid (H ₃ BO ₃ ) + borax (Na ₂ B ₄ O ₇ · 1OH ₂ O), and heat resistance is close to 1000 ° C. It is a boric acid-based work that binds sand.
Conventionally, there were very few measures against hydrogen gas generated. Since our coating agent has sufficient countermeasures against dehydrogenation, the method of eliminating the hydrogen generated in the casting is almost complete, so that TI chip casting can be 100% possible.
In order to assemble a cermet TIC chip in a complicated manner, high chromium hot water is always raised to + 50 ° C, so a flux with improved heat resistance is further required. Because of various combinations such as Iseki, heat resistance, surface tension removal, and flow damage, computational casting techniques are required up to the thermal energy of hot water. The more casting water is used, the higher the casting cost will be, so it will be about 20% of the max product weight. Continuing to increase casting costs. In order to make a 100% product with a small amount of hot water, casting requires the design of the runway of the hot water flow, cooling effect reduction measures due to the difference in wall thickness, technology and experience. Therefore, experience is necessary for many years and it is becoming a declining industry.

The graph shown in FIG. 4 is an example of the high temperature hardness of various weld metals.
From this graph, the hardness drops drastically at 500 ° C. Even with the same workpiece chip, WC carbide inserts show the highest hardness up to 200 ° C, but drop nearly 20% compared to the cermet TIC insert.
The use of the recovery cermet TIC chip can be recovered close to zero because it is expensive. It is the most suitable material for high temperature wear where heat is applied to recycle resources. The high temperature hardness of high chromium cast iron as the same main metal is shown.
This chrome cast iron is used to cast a cermet TIC chip, so that it can be used in a water-cooled structure so that it can be used at max.
Examples of application of the cermet cermet TIC chip of the present invention will be introduced below.

<Application example 1>
The figure which shows the side surface outline | summary of the sintered ore crushing equipment of the sintering factory of a steelworks in FIG.
It is a facility that sinters iron ore with quick lime and coke, sinters on a pallet truck at around 1000 ° C, crushes this, cools it, and enters the blast furnace.
Briefly describe the equipment.
01 is baked with iron ore, quicklime and coke on the trolley while running on the pallet trolley. 02 is a sintered ore that falls from the pallet truck, pooled in the stone box 03 in a cool manner, and uniformly falls on the public distribution surface.
04 is a rotating demon that crushes sintered ore. It is a water-cooled structure, and 05 is a blade of a demon tooth. Of course, it is water-cooled with a white iron-cast iron overlay. However, because of the build-up, there are many cracks, and it reaches 600 ° C ± 30 ° even if calorific value is calculated or there is no crack.
06 is a hardened structure with a water-cooled structure, which is the receiving tooth, but because of the buildup, there are many cracks, so the place at 550 ° C ± 50 ° C is full.
07 is a sintered ore crushed by demon teeth and dentures, and flows on the top surface of Stone Box 03 near 1000 ° C. The pool holding surface, which is called Izeki, is also a place where heat and wear are applied , and high chrome cast iron is used.

The optimum grain size is selected for the blast furnace using the vibration sieve 08. The larger sinter is pulverized again with another pulverized material (W roll method).
The above is the main of the sintering equipment, but all are exposed to high temperature wear.
Only 04, 05, and 06 are water-cooled, but the tooth receiving 06 is reversed for about 2 years, and it is only 2 years.
Casting a TiC cermet chip in high chrome cast iron has a lifespan more than twice as long. In addition, if the cast-in surface can be maintained at 450 ° C or lower, the service life is expected to be extended. It has been water-cooled and has not been used for about 30 years. The inventor has developed a cast-flux for the long-life tooth receiving for sinter ore crushing by the Japanese Patent Application Laid-Open No. 2001-96182 in the past. Cermet TIC chips were also expensive.
In addition, the cost of removing the vacuum thin film on the surface of the cermet TIC chip was also the cause of the cost increase.
Since the cermet TIC chip is vulnerable to compression applications, only 20% of the top surface that cracks and rises is used. In the invention of Japanese Patent Laid-Open No. 2003-71556, the challenge was to cast a cermet TIC chip, but at this time it was difficult to remove the vacuum thin film because it was 100% plated.
We have developed a technology to impregnate the liquid flux into the porous surface of the arc sprayed surface without thick plating.

Application Example 1 shown in FIG. 6, the sinter is受歯100 of crushing equipment, a longitudinal sectional view of a single受歯100 (1) of FIG. 6, Haikuromu the main part of the受歯the glove unstructured cast of cast iron shown in (2) of FIG. 6, a cross-sectional view I glove do cast cermet TiC tip of cast iron shown in Figure 1 of the present invention the main part of the受歯in FIG. 6 (3) Shown in
In (1) to (3) in FIG. 6, this tooth receiving 100 is a water-cooled structure in which rough pulverization is performed while shearing the sintered ore that has been sintered and hardened by the adjacent tooth receiving teeth. It is a denture.
The incoming water on the left side of (1) in Fig. 6 flows through the chamber divided into the upper part through the lower part.
Reference numeral 101 denotes a divided tooth receiving segment 101 of a high chromium cast iron cast divided into three central ridges. This is a place where the falling impact and expansion and contraction are severe, always falling and crushing. It is not a one-body structure, it is divided and about 30% higher than the front and rear divided tooth segments 106. Is a feature. 107 is a receiving tooth that is lowered by one step so that the fall of the sintered ore does not go to the inverted receiving tooth in the center, and does not contain a cermet TIC chip.

The high chromium cast iron 103 for casting the cermet TIC chip 102 arranged at the tip of the split tooth receiving segment 101 is Cr2C7 (chromium carbide) NbC2 (niobium carbide) WC (tungsten carbide) MoC (molybdenum carbide) VC (vanadium car) Bite) Designed to generate 5 types of carbides, as shown in Fig. 6 (2), the carbon content is designed to be as high as 3.5% in order to improve the hot water flow and to make carbides. . Refer to the special high chrome cast iron with high temperature hardness shown in Fig. 4.
104 is a copper fin bolt for cooling high- chromium cast iron, so that it can be cooled to 430 ° C or lower, and it has a feature that three divided tooth receiving segments are included in about 150 &#13220;. Designed to maintain HV-900 ± 20, the heat quantity calculation uses M30 × P = 2 three copper bolts, and the structure is always immersed in a water cooling chamber for cooling.

105 is a casting-main plate which also serves as a prevention and water-cooled chamber exits Haikuromu cast iron, to 40 m / m thickness of SS400, anchoring the Haikuromu cast iron at two trapezoidal groove 111 of the prevention omission.
Reference numeral 108 denotes a side plate for securing a water channel in the case of reversal in which 105 and 106 are exchanged by changing the side plate for entering and discharging water.
109 is an H-steel mold side plate that also serves as a water-cooling chamber and has an H-shaped cross section that forms and holds both side surfaces of the entire tooth receiving portion. A hardened liner for protecting 109 is disposed on the side surface.
110 is a copper plate that acts as a cushion for expanding and contracting due to the overall thermal stress. The linear expansion coefficient between high- chromium cast iron and iron covers a difference of about 20% between 9.5 × 10-6 and 11.7 × 10-6 with 17.7 × 10-6 of copper. (The copper plate plays the role of a kind of shock absorber) If the water is not cooled with sintered ore close to 1000 ° C, it will reach 700 ° C ± 100 ° C. Because of the method, there were many cracks and the water cooling efficiency was bad.) And the high temperature hardness table reference in Fig. 4 (HV-300 to 450)
This is a segmented type tooth receiving with a cermet TIC chip in a special high- chromium cast iron that retains twice the hardness of the conventional and produces five types of composite carbides. And the waterway is designed to be able to secure 15 &#8467; even if the water stops temporarily like a reservoir, it always secures 30 &#8467;

FIG. 6 (3) shows a cross section of the high chromium cast iron caster 103 of the tooth receiving divided tooth receiving segment 101 type, and the arrangement of the cooling bolt 112 and the cermet TIC chip 102.
High chromium cast iron cast 103 is cast iron from which special composite carbides are produced. The lower trapezoidal groove 111 is prevented from coming off. The cermet TIC chip 102 has a structure in which the cooling fin 113 is fastened to the cooling fin 113 with bolts and bolt nuts. The cooling fin 113 is welded and assembled to the clad steel and welded to the copper bolt case 114. The cermet TIC chip 102 is formed by applying the electroless plating on the cured film without removing the vacuum thin film which is the cured film on the surface, and then dipping and adhering the liquid flux containing the above-mentioned porcelain clay.

Reference numeral 115 denotes a main plate in which a trapezoidal retaining groove 111 is dug in a 40 m / m thick plate serving as a cast-in frame. 116 is a pipe of SS400 for welding with 105 crut steel 105, and the top surface 104P of copper bolt 104 φ10 × 15 &#8467; powder silver coffin mixed with flux and silver paste 45% to 35% And brazed at a heat of 1500 ° C to 1550 ° C. Therefore, 104 and 104P are united, and the cooling effect does not change. The copper bolt 104 is M30 and P = 2 threaded, increasing the fin area by 20%. The 105 clad steel is made of SS400 on both sides and a copper plate on the center, tightened with 6-M6 bolts and silver-plated from the outside.

Reference numeral 112 denotes a bolt and nut for fixing the cermet TIC chip 102 to the cooling fin 113.
Since the cermet TIC chip 102 is stopped by the cooling fin 113 that produces a waterless cooling effect on the holding plate, the close contact portion has a cooling effect. In addition, after the assembly is completed, the entire plate 102 is electroplated with the chip 102 attached thereto, so that the Ni + B plating is plated at 1200 ° C. ± 50 ° C. by cast-in heat and special flux coating effect.
Due to the double effect of cermet TIC chip 102 and HV900 ± 30 compared to HV550 ± 30 of special high chromium cast iron, the service life is nearly three times longer. In addition, as a countermeasure against slime attached to the water cooling chamber, since a magnet is contained in the copper bolt 104, an ionic current flows from iron to copper, so that the slime attachment prevention effect is great.
In (2) of Fig. 6, 117 is Iseki, and because the special high chromium cast iron of the feeder is directly hit, the holding of the cermet TIC chip 102 welds SS400 9m / m to SS400 3.2m / m. Stop once and raise by convection.
The hot water enters the hot water gate 118 that also serves as the top of the sand mold at the two Iseki 117, and the hot water while solidifying from 20 seconds without solidifying with the help of the heat generating agent from here Hot water is supplied to the extent that the volume at the time of contraction shrinks.
The entrance and push gate 118 is a forced flow that rises and then descends because it communicates with the trapezoidal groove 111 through the runners 119 and 120 divided into two and stops at the Iseki 117.

<Application example 2>
Application Example 2 is also a tooth receiving, and detailed views are shown in (1) to (3) of FIG.
In (1) to (3) of FIG. 7, since the trapezoidal groove 202 is cut in the pedestal 201 which is a cast-in bone, the water cooling chambers 204 and 205 formed of the H steel 203 are shown in the upper and lower stages as shown in the section BB. 15 &#8467; Designed to collect water in the water channel as a countermeasure to maximize the water channel of the upper water cooling chamber 204 and prevent the water cooling effect and temporary heating at the time of water stop Three 206 are included in the one-part tooth receiving segment 200.
Each of these three copper bolts 206 (M30 × P = 2) contains 14 pieces of 3000G neodymium magnets 207, and the magnetic field lines of the demagnetizing field are perpendicular to the copper bolts 206, thereby framing. When water flows through a magnetic field according to the above law, a minute current is generated, so that the minute current flows from the SS of the side plate to the copper bolt 206 as an ionization current, thereby preventing slime from adhering to the inner walls of the water cooling chambers 204 and 205. On the top surface of the copper bolt 206, a chamber for containing 35 to 45% plague culm is formed to form a storage chamber. High chromium hot water 1500 ~ 1550 ° C with flux in plague ginger, the mounting case (207, 208) and the brazing to be integrated into one body will be completed in about 20 seconds.

A cermet TIC chip 210 is attached to a copper bolt nut 212 via a copper plate 208 between clad steels 207 at the tip of the copper bolt 206.
The clad steel 207 has a structure in which a copper plate 208 is inserted in the center and thirteen holes 209 each having φ20 are opened, so that hot water is introduced into the holes 209 to prevent slipping out and improve the cooling effect of cast iron water.
Hardened build-up liner 211 (HV-900) is bonded to both sides of the H steel forming the water cooling chambers 204 and 205 to protect the water cooling chambers 204 and 205 of the H steel.
Cast iron casts a cermet TIC chip 210 with the entire coating according to the present invention. In other words, 5/100 ± 1 / 100mm Ni plating is applied on the fired film of liquid flux, and the surface is coated with special liquid flux containing glaze, so it does not burn up to 1200 ° C for about 20 seconds, In order to protect the plating flaw, it is brazed when it solidifies near 1200 ° C, but is fixed with two trapezoidal grooves 202 and φ20-13 holes 209 that prevent it from coming off. In the past, the inventor has carried out experiences related to casting with various patents, but the flux developed by the present inventors in the past was not a real flux that can be brazed at 1000 ° C. In other words, the high- chromium cast iron stuffed flux is a flux that is close to the sword , is not a glaze, and is not a heat-resistant brazed flux, but exhibits a great function only after being cast. The present inventors finally succeeded by adding research and achievements of long-standing mochi-flux.

<Application example 3>
Application Example 3 is a demon tooth 04 of the water-cooled sinter ore crusher. FIG. 8 shows an enlargement of the blade tip of the disassembly / replacement demon tooth, and shows the cast and fixing method of the cermet TiC chip. .
Normally, in the demon teeth, water flows from the three water channels on the surface of the shaft 301 to the three water channels in the demon teeth, and the high chrome cast iron gurumi of the three demon teeth arms 302 and the crushing portion 303 at the tip thereof. 314 is cooling.
Each demon tooth 302 has a cooling water channel 311 in the devil tooth base material 312. The demon tooth 302 is a 100% white birch high chrome cast iron rod (welding rod φ12 to φ20), which is conventionally used as a cast iron for the crushing portion 303 formed at the tip of the devil tooth base material 312. Heat is injected into the Iseki area of SS400 for a build-up method with high hardness of Hs80 ± 5 by inserting carbon into the part. It is closer to casting rather than to be built up.
For this reason, the surface of the white birch is cracked in a turtle shell shape and barely held at Iseki.
The cooling effect of [400] SS400 is good, but the casting part was cracked, so the cooling effect was less than expected, rotating between 550 ° C and 650 ° C.
Unlike the denture, the demon teeth rotate, so there is very little slime attachment.
It is because rotation vibration and striking force are added that the life of a tooth is not 1 year with a reversal of both teeth. Demon teeth have a total weight of 40t ± 5t when one set is installed, and replacement once a year is high, so disassembly and assembly costs are high as maintenance costs.
When disassembling only the cutting edge can be replaced, the division cost ends at 1/4.
Long life and easy replacement can lead to cost reduction at each steelworks.

In (1) to (3) of FIG. 8, the cast cermet TIC chip 304 is attached from the top to the bottom along the trapezoidal groove 306 of the cooling copper plate 305 supported by the receiving groove of the base material 312 via the support arm 313. When the placement base is inserted, the M16 bolts 307, 308 are fixed from the rear of the devil tooth base material 312 and the top surface is also attached to the base material 310 by the M16 bolts 309, 310. Since the back of the water cooling chamber 311 is machined at the start, it can be reliably assembled and assembled, but since it always adds to the striking force back, the trapezoidal groove 306 has a backlash.
Therefore, the heat transfer cement (graphite + water glass) was pressed into the internal thread of the bolts 307 and 308 by the pump method (the same principle as grease injection), and leakage from both side tops of the heat transfer cement was observed. Tighten the rear bolt above. Since water glass blows above 450 ° C, its volume increases and adheres at that pressure. Therefore, the exchange method was made possible on site.

<Application example 4>
Application example 4 is a liner 401 of a swirl chute 400 of a bellless blast furnace ore input shown in FIG. 9, and schematic views are shown in (1) to (6) of FIG.
In (1) to (6) in FIG. 9, the swivel chute 400 has a U-shaped width of about 1000 m / m, a length of 400 mm, and a height of 1600 mm on the outer periphery of the blast furnace in the order of iron ore, coke, and raw apatite. In addition, it is a device that disperses these 360 ° to a uniform thickness in the blast furnace volume by computer control of the tilt angle. To prevent wear of the liner 401, it is already cemented in the high chrome cast iron 402 on a plurality of surfaces in cross section from the center. CW403 is cast.
This is a cemented carbide casting method described in the inventor's patent No. 5013349, and is 50 to 52 kg per sheet from a carbide specific gravity of 19.3. Humans do this in exchange. It is very heavy and it is 20-25kg according to the Industrial Safety and Health Law.
In the case of the liner 401 of the cermet TIC chip 404 cast iron 404, the weight is reduced by 35 to 37 kg (30 to 35%).

The swivel chute 400 is a bellless body casing, 405 is a high chrome holding plate, and a cermet TIC chip 404 and a support fin 406 are cast on a high chrome cast iron 402 on the holding plate 405. A long hole 407 is formed in the support fin 406, and hot water flows to the next fin through the long hole 407. This support fin 406 is electroplated Ni after electroless plating on the whole, and coated on it with a heat-resistant flux similar to cocoon mixed with special flux + glaze, sand mold 450 ℃ ~ 500 ℃ The liquid flux boride borofluoride fixes the glaze particles one by one during overheating, covering the thermal shock and heat resistance of 1500 ℃ ± 50 ℃ high chromium cast iron bath, It is plated when high- chromium cast iron semi-solidifies at 1200 ℃ ± 50 ℃.

On the lower surface of the holding plate 405, a countersunk hole 408 having a diameter of φ22 to φ20 is formed so that the high chromium cast iron 402 can be prevented from coming off. Because it is a stepped surface that follows the flow of ore, there is no biting of the laminated surface. When the ore is charged, the tip of the chute inlet is balanced at around 476 ° C because it receives the heat radiation in the blast furnace at 1200 ° C to 1300 ° C. Although there is a handicap that cemented carbide is vulnerable to high-temperature oxidation, the cermet TIC chip 404 has a large difference from the cemented carbide chip holding HV550 even at 800 ° C. from the high-temperature hardness table of FIG. High wear liner that is light and has high temperature hardness can be made. This is the only flux that can be said to be 100% cast-in-finish.
The inventor's conventional flux brazing is max 1000 ° C., and the flux for max 1550 ° C. is impossible with conventional inorganic borides and borofluorides.

<Application example 5>
Application Example 5 is a drilling piercer 501 and a die 502 for a 13Cr-1Ni special pipe for oil drilling shown in FIG. max1450 brightness for the piercer 501 holes into a round billet (Martin site steel) of ℃ is for receiving the high temperature wear-resistant, TiC at powder plasma piercer _{surface, WC, Cr 2, C 7} , VC, Mc, carbides such as NbC Is piled up with stellite powder as a binder.
Since the oxidation of WC-based and NbC-based begins to abruptly exceed 400 ° C, this oxide film becomes a high-temperature lubricant and serves as a piercer.
In the past, 4m / m on one side was the limit due to powder plasma build-up. Therefore, 30 holes per hole was the limit.

In the chemical composition of high chromium cast iron , W → 0.5-1% is changed to W1.5-2%, Nb 0.5-1% is changed to Nb → 2.5% -3%, and the chemical composition is first adjusted to make carbide 2.5 ~ Compound carbides are easily made by increasing 2.8% to 3 to 3.5%.
Conventionally, it is composed of a combination of a piercer body in which 5 to 6 types of carbide layers are formed with SCM-440 powder plasma on the surface layer and a special high lead screw that stops the push rod.
The push of the martensitic round bar and the conventional piercer have a water vapor passage hole. By accelerating the forming of the oxide film by spraying these water vapors during the press-fitting of martensite steel, the oxide film of the carbide oxide film could be quickly formed as a lubricant.
The die is subjected to strong impact and friction at the 1400 ° C ± 50 ° C round steel extrusion inlet, so it is a kind of heat-resistant steel, which is a cast product of high chromium high alloy steel.
When the plasma build-up portion wears up to 10 m / m, it turns into a rough die, and the finishing die is always new. For this reason, it is a die that is collected and recast for casting.

The special high chromium cast iron 503 of the piercer 501 of this application example 5 increases the carbon, W, and Nb in the cast iron, so the amount of WC and NbC is more than twice that of the conventional high chromium cast iron . Special metal core body 504 that holds the Haikuromu cast iron 503 insert casting and special Haikuromu cast iron 503 is a conical structure, the spiral fins 505 around it be wound present 6-8, carbide in the helical fins Chips 506 and cermet TIC chips 507 are alternately assembled and welded in a spiral shape.
A trapezoidal groove 508 is formed in the lowermost stage of the main body 504, which has a spiral shape so as to release the compressive stress applied to the cermet TIC chip 507. The entire surface including the core metal body 504 is plated with Ni, coated with a special flux, and the sand mold is heated at 450 ° C. to 500 ° C., and then a special high chromium cast iron 503 is cast. Although not shown, a hole is secured as a water vapor passage hole. With a cermet TIC chip 15m / m, the wear resistance is nearly four times that of the conventional plasma plasma max 4 m / m piercer, and it can be used as a finishing piercer at the start and as a No. 1 or 2 in terms of wear. Therefore, it has a lifetime that is more than three times that of conventional piercers.

Thus, by casting the lower WC carbide tip 506 and the upper cermet TIC chip 507 on the surface layer of the piercer body 504, the conventional oxidation resistant films NiO ₂ and CrO ₂ were weak, but the oxidation of WC Since the film and the TiC oxide film become a high lubricant, they have a long life.
The recovery and re-casting of the piercer body 504, the cermet TIC chip 507 is completely dissolved at 1500 ° C ± 50 ° C and floats as a deoxidizer, so the bone fin 504 is SS400, and as a whole chemical component An increase in iron of 1 to 2% leads to remelting of the WC carbide tip 506, thus increasing the WC lubricant function. Each time redissolving, W increases to max 5%. Since water vapor (H2O ↑) always enters from the lower stage of the die, the surface of the die is forcibly oxidized, and this oxide film acts as a high-temperature lubricant between the pipe and the die, so the wear is kept low.
Speaking of lubricants, it is oil, but in the world at 1400 ° C ± 50 ° C, it is a solid lubricant, and graphite, serpentine (Mg ₃ Si ₂ O (OH) 4), mica (Si ₄ O ₁₀ (OH)) ice Crystallite (Na ₃ AlF ₆ ) boric acid (H ₃ BO ₃ ) is often used, but because of its low melting point of 1400 ° C ± 50 ° C, it sticks to the outside in the form of glass, and in the case of SUS, graphite has a carburizing action. Therefore, the corrosion resistance may be impaired. A refractory metal oxide film is used as a lubricant.
It became possible to make it at a reduced cost with the recovery chip.

Similarly, the lower die WC carbide tip 521 and the upper cermet TIC tip 522 are alternately arranged on the surface layer of the die 502 and casted with high chromium cast iron 503.
510 is a pipe formed into a pipe shape by a piercer 501 and a die 502.
Since the die 502 receives strong impact and friction at the 1400 ° C ± 50 ° C round steel extrusion inlet, it was conventionally a cast product of high- chromium cast iron high alloy steel even though it is a kind of heat-resistant steel.
When the surface layer wears up to 10m / m, it turns into a rough die, and the finishing die is always new. Therefore, it is recovered and recast die for castings.
By casting WC carbide tip 521 and cermet TIC chip 522 on the surface layer, the conventional oxidation resistant films NiO2 and CrO2 were weak, but the WC oxide film and the TiC oxide film become high lubricants. Long life.
<Application example 6>

Application Example 6 is a blade of a kneading machine extrusion screw. FIG. 11 shows a cross-sectional view (1) and a longitudinal cross-sectional view (2) of the screw blade 600. FIG. 12 shows paddle blades 601-1 and 601-2. FIG. 2 shows a cross-sectional view (1) and a longitudinal cross-sectional view (2) of the cast-in structure.
Kneading machine Extruder screw blade 600 is a kneading machine that collects dust collected by the electric dust collector of each factory such as sintering factory, converter factory, blast furnace factory, topped car dephosphorization desiliconization decarburization factory, coke factory, etc. Extruded agglomerated.
The blade 600 of the screw shown in FIG. 11 is welded and attached to both ends of the rotating shaft 610 by separating the cast-in portions of the paddle blades 601-1 and 601-2 shown in FIG.
Paddle blades 601-1 and 601-2 are connected in the axial direction of the rotary shaft 610, and EP ash ( ash collected by an electric dust collector) is kneaded while putting tar into the die hole of φ20 to φ22 at the tip. Extrude and make billet of φ20 ~ 22 l = 25 ~ 30. This recovered EP billet is placed on the upper surface of the converter, and helps to prevent hot metal oxidation and smelting, and 40-50% iron oxide and Si, Mn, Ca, etc. are used to form smelted iron on the upper surface of the converter. . It consists of 40 to 50,000 tons of iron per year.

Conventionally, the screw blade 600 is a high chrome cast iron fillet only at the tip, but it is a SUS cast flake with precipitation self- hardening of SUS ± # 630 because it is difficult to have a wear step.
In this application example 6, a fin 603 is welded to a metal core 602, and a cermet TIC chip 604 is fixed to the tip of the fin 603 with a bolt 605. After this entire assembly, electrolytic copper plating (1083 ° C. and melting point lower than Ni) And cast with a fillet with a small amount of hot water (SUS ± # 630).
At this time, you need the help of special cast flux. After this, casting is performed with high chromium cast iron 606.
Since SUS is SUS ± # 630 and Hs50 ± 5 compared to high chrome cast iron Hs65 ± 5, a step is produced between the TI chip 601 and the cast-in cast iron is worn earlier. This step is suitable for screw feeding and enables extrusion with a uniform compression force.
As a result, the service life is 4-5 times longer than conventional WC-based buildup.
In addition, the uniform feed leads to prevention of pulsation and a long life of 1 year.

<Application example 7>
Application Example 7 is a chute tip hardware 701 shown in FIG. 13 and attached to the head of the stone box 03 of FIG. The chute tip hardware 701 is a natural chilled falling ore of 900 ° C ± 100 ° C and serves as a temporary pool. Therefore, conventional high chrome cast iron is conventionally attached to the head 702 and M32 bolt tightening. 20 to 30 m / m that wears to the head was 0.7 to 1 year as the life to replace.
The wear part of the chute tip metal fitting 701 had no hardened build-up on the head of the presser bolt, and thus had a life of 0.7 to 1 year.
In FIG. 13, a special chrome cast iron 704 with a head of 20 m / m is cast on the head of the bolt 703 and a cermet TIC chip 705 is cast on the L-type head 702, thereby extending the life of 2.5 to 3 years.

If the L-type head 702 is pressed with M32 bolts 703 and casted with stellite with high- chromium cast iron 704 with CWup, the service life will be three times longer.
Prolonging the life of regular repairs is hot in the field, and it is difficult to secure the number of people in the case of regular repairs under the worst conditions and severely crushed scaffolds.
It is the place where the longevity should be extended most, and the cermet TIC chip 705 retains the hardness of HV600 or higher even at 800 ° C, which is three times that of high chromium cast iron alone.

Since the high chrome cast iron cast-in method of the cermet TIC chip according to the present invention exhibits the above-mentioned excellent operational effects and application effects, the heat-resistant and / or wear-resistant means in the industrial industry such as iron-related businesses and industrial equipment have a significantly long life. There are a lot of things to contribute, such as making it feasible.

102, 210, 304, 404, 601, 522, 507, 705: Cermet TIC chip subjected to surface coating treatment of the present invention
100: Tooth receiving of water-cooled sinter crusher crusher
200: Denture segment
302: Demon arm of water-cooled sinter crusher crusher
401: Swivel chute 400 liner
502: Dice
504: Piercer body
601-1,601-2: Paddle feather
701: Chute tip hardware

Claims (8)

  The surface of the cermet TiC chip coated with a vacuum thin film is washed by degreasing and pickling the surface, followed by dipping and adhering the liquid flux, then heating to bake the liquid flux on the surface of the cermet TiC chip, and then the baking The surface of the flux is coated with electroless copper plating or Ni-B plating, and then a fired film of liquid flux containing porcelain is formed to complete the surface treatment, and then cast with Hi-Cr cast iron. The manufacturing method of the Hi-Cr cast iron cast-in-case structure which becomes.   The surface of the cermet TiC chip coated with a vacuum thin film is washed by degreasing and pickling the surface, followed by dipping and adhering the liquid flux, then heating to bake the liquid flux on the surface of the cermet TiC chip, and then the baking Electroless copper plating or Ni-B plating is coated on the surface of the flux, then electroplating and Ni-B plating are coated, and then a fired film of liquid flux containing porcelain is formed to complete the surface treatment. A method for manufacturing a Hi-Cr cast iron cast structure characterized by casting with Hi-Cr cast iron after this. The liquid flux contains potassium fluoride, acidic potassium fluoride, boric acid, borax, potassium borofluoride, and these are dissolved in an alcohol or acetone solvent, and the clay is a glaze for earthenware. A method for producing a Hi-Cr cast iron cast structure according to claim 1 or 2. The Hi-Cr cast iron cast structure according to claim 1 or 2, wherein the cermet TiC chip whose surface is coated with a vacuum thin film is immersed in a liquid flux for 10 to 15 seconds and covered with the liquid flux. Production method.   The method for producing a Hi-Cr cast iron cast-out structure according to claim 1 or 2, wherein a coating thickness of the electroless copper plating or Ni-B plating is 1/100 to 3/100 mm. The manufacturing method of the Hi-Cr cast iron cast structure according to claim 1 or 2, wherein the coating of the electric plating and the Ni-B plating is 1/100 to 3/100 mm.   In the cermet TiC chip (10) whose surface is coated with a vacuum thin film (1), a liquid flux fired film (2) is formed on the surface of the vacuum thin film (1) coating, and the liquid flux fired film (2) 1/100 to 3/100 mm of electroless copper plating or Ni-B plating (3) is formed on the surface, and firing of liquid flux containing porcelain clay on the electroless copper plating or Ni-B plating (3) A cermet TiC chip for a Hi-Cr cast iron cast structure characterized by forming a film (6).   In the cermet TiC chip (10) whose surface is coated with a vacuum thin film (1), a liquid flux fired film (2) is formed on the surface of the vacuum thin film (1) coating, and the liquid flux fired film (2) Electroless copper plating or Ni-B plating (3) is formed 1/100 to 3/100 mm on the surface, and electroplating (4) and / or on the electroless copper plating or Ni-B plating (3). The Ni-B plating (5) is formed to 1/100 to 3/100 mm, and a fired film (6) of liquid flux containing porcelain earth is formed on the electric plating and / or the Ni-B plating (5). A cermet TiC chip for a Hi-Cr cast iron cast structure characterized by that.