CN115533079A - Preparation method of replaceable metal ceramic composite lining plate - Google Patents

Preparation method of replaceable metal ceramic composite lining plate Download PDF

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Publication number
CN115533079A
CN115533079A CN202211083302.0A CN202211083302A CN115533079A CN 115533079 A CN115533079 A CN 115533079A CN 202211083302 A CN202211083302 A CN 202211083302A CN 115533079 A CN115533079 A CN 115533079A
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CN
China
Prior art keywords
metal
metal ceramic
ceramic
prefabricated body
lining plate
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CN202211083302.0A
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Chinese (zh)
Inventor
王大亮
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Jiangsu Shuangfa Machinery Co ltd
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Jiangsu Shuangfa Machinery Co ltd
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Priority to CN202211083302.0A priority Critical patent/CN115533079A/en
Publication of CN115533079A publication Critical patent/CN115533079A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/04—Casting by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/22—Lining for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F3/26—Impregnating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Food Science & Technology (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a preparation method of a replaceable metal ceramic composite lining plate, which comprises the steps of placing a group of metal ceramic prefabricated bodies in a cavity corresponding to a reinforcing surface of the lining plate, pouring molten metal into a casting mold, cooling and solidifying to obtain a reinforced metal matrix composite containing the metal ceramic prefabricated bodies, and preparing the metal ceramic composite lining plate. The wear resistance of the service surface is enhanced by the obtained metal ceramic composite lining plate, the service life is prolonged, and the lining plate is replaceable, so that the lining plate can be replaced and maintained quickly after being worn, the cost of replacing the body is reduced, and the maintenance time is shortened.

Description

Preparation method of replaceable metal ceramic composite lining plate
Technical Field
The invention relates to the field of mining equipment, in particular to a preparation method of a replaceable metal ceramic composite lining plate.
Background
Wear-resisting welt is often used for conveyer welt, coal feeder bottom plate, cyclone back taper, roll squeezer side shield and welt, wear-resisting blade etc. among the current mounting structure, the welt uses monolithic mounting structure as the main more, to being connected with the body, needs to install piece by piece. The abrasion-resistant lining plate is directly impacted and abraded by the abrasive body and the materials, however, the abrasion of the abrasion-resistant lining plate is very quick, the abrasion resistance of the body cannot support the impact of the materials for a long time, the abrasion-resistant lining plate needs to be replaced at intervals, and the labor intensity and the cost are increased.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a manufacturing method of a replaceable metal ceramic composite lining plate, the obtained metal ceramic composite lining plate enhances the wear resistance of a use surface and prolongs the service life, and the replaceable lining plate can be quickly replaced and maintained after being worn, so that the cost of replacing a body is reduced, and the time required for maintenance is shortened.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a replaceable metal ceramic composite material lining plate is characterized by comprising the following steps: placing a group of metal ceramic preforms at a cavity corresponding to the reinforcing surface of the lining plate, pouring molten metal into a casting mold, cooling and solidifying to obtain a reinforced metal matrix composite material containing the metal ceramic preforms, and preparing the metal ceramic composite material lining plate;
the method comprises the following specific steps:
1) Determining a casting process: adopting a lost foam insert casting process;
2) Preparing a matched sand box, a dried mould and a metal ceramic prefabricated body;
3) And landfill modeling: welding steel nails on the surface of the metal ceramic prefabricated body to prevent the metal ceramic prefabricated body from being washed and shifted by molten steel during pouring, sequentially embedding the metal ceramic prefabricated body into the die body in a clearance arrangement mode, and exposing the steel nails outside the die body for positioning the prefabricated body; the prefabricated body is recessed by 2 to 5mm from the surface of the mold and is sealed by a mold cover plate; the mould is immersed in the coating for three times and dried for three times, so that the coating is uniformly and compactly covered, and the water in the mould and the coating is completely removed; when the mould is immersed in the coating for three times, the viscosity of the coating is respectively prepared according to the thickness, the normal thickness and the thin thickness;
a bottom pouring type pouring system is selected to ensure that the mold is liquefied in order and molten steel is stably filled; in order: bottom sand, molding, sand adding, secondary sand adding 9 to full, vibration, negative pressure evacuation, film covering and floating sand adding; in the landfill process, once the paint on the surface of the mould is damaged, the mould is immediately pasted and repaired by an adhesive tape and the paint is replenished, and then the mould is dried by electric blowing; and vacuumizing under negative pressure to compact the sand and position the metal ceramic prefabricated body welded with the steel nails.
4) Smelting and pouring: smelting production by adopting an intermediate frequency electric furnace, discharging from the furnace and pouring after final deoxidation; controlling the tapping temperature at 1430-1480 ℃, and casting after the molten steel is calmed for several minutes, wherein the casting temperature is controlled at 1350-1420 ℃;
when molten steel is poured, the sand box is vacuumized to form a certain negative pressure, the mold is quickly gasified, the molten steel slowly occupies the position of the mold, and the metal ceramic prefabricated body is tightly wrapped; under the thermal action of high-temperature molten steel, the surface metal of the prefabricated part reacts with the molten steel; after the molten steel is solidified and cooled, the molten steel is compounded and molded with the prefabricated body to obtain a reinforced metal matrix composite material containing the metal ceramic prefabricated body;
5) A liner plate is made from a reinforced metal matrix composite material containing a cermet preform.
In the invention, the metal ceramic composite material lining plate comprises a lining plate provided with bolt holes; the lining plate is made of reinforced metal matrix composite material containing a metal ceramic preform; the metal ceramic preform is prepared by uniformly stirring and mixing a binder, metal powder and ceramic particles according to the mass ratio of (0.4).
The metal ceramic prefabricated body is obtained by the following steps: uniformly mixing a binder, ceramic particles and metal powder by a stirrer according to the mass ratio of the binder to the metal powder to the ceramic particles being 0.4; filling the obtained mixed material into a die, taking out the shaped material after stamping and shaping, and drying to obtain a metal ceramic preform, wherein the drying conditions are as follows: the temperature is increased to 200 to 250 ℃, wherein the heating rate is 80 to 150 ℃/h, and the temperature is cooled to the normal temperature along with the furnace after being increased to the set temperature.
The ceramic particles have a particle size of 10-20 meshes, and the ceramic material is: zirconia corundum, black corundum, silicon carbide, boron carbide or titanium carbide;
the adhesive is as follows: one or more than two of water glass and silica sol inorganic binder are mixed according to any proportion;
the metal powder is FeCrC self-fluxing alloy powder, the addition amount of the metal powder is 25-35% of the mass of the ceramic particles, and the powder granularity is 0.5-30um.
The metal ceramic prefabricated body is of a honeycomb structure, honeycomb holes are round or regular polygons, the wall thickness among the honeycomb holes is 4-30mm, and the thickness of the metal ceramic prefabricated body is 5-110mm.
And the group of metal ceramic prefabricated bodies are uniformly distributed along the axial direction and the radial direction.
The existing wear-resistant lining plate is formed by overlaying an alloy wear-resistant layer which mainly comprises Cr7C3 carbide with the volume fraction of more than 50 percent on a common steel plate or a heat-resistant steel plate, the hardness of the alloy wear-resistant layer is about HRC55, and in order to enhance the hardness and the wear resistance, a ceramic preform is pre-embedded during casting and is made of a reinforced metal matrix composite material containing the metal ceramic preform. The invention is suitable for easily-worn parts of mining equipment.
The invention has the beneficial effects that:
according to the method, the bonding strength of the ceramic particles and the metal matrix is enhanced through the organic combination of the metal liquid and the honeycomb-shaped metal ceramic, the wear resistance is improved, the workload and the cost of frequent replacement are reduced, and the method is energy-saving and environment-friendly.
The method of the invention has the following adjustability for wear-resistant parts: the ceramic prefabricated body is provided with the concrete size of the prefabricated body according to different workpiece requirements, and the surface of the workpiece is positioned and enhanced, so that the service performance of the workpiece is improved.
Drawings
FIG. 1 is a schematic drawing of a casting process for a cermet composite liner plate of the present invention.
FIG. 2-1 is a schematic front view of the cermet composite backing plate of the present invention.
Fig. 2-2 is a schematic cross-sectional view of the cermet composite backing plate of the present invention.
FIG. 3 is a schematic structural diagram of porous cermet preforms with different pore-type structures.
FIG. 4 is a schematic view of the assembly of the metal ceramic composite liner plate and the body of the present invention.
The labels in the figure are: 1-a metal ceramic prefabricated body, 2-a reinforced metal matrix composite material containing the metal ceramic prefabricated body, 3-a steel nail, 4-a mould body, 5-a mould cover plate, 6-a bolt hole and 7-an equipment body.
Detailed Description
Fig. 1 is a schematic drawing of a casting process of a replaceable metal ceramic composite lining plate according to the present invention. FIG. 2-1 is a schematic front view of the cermet composite backing plate of the present invention. Fig. 2-2 is a schematic cross-sectional view of the cermet composite backing plate of the present invention. Placing a group of metal ceramic preforms 1 at a cavity corresponding to the reinforcing surface of the lining plate, pouring molten metal into a casting mold, cooling and solidifying to obtain a reinforced metal matrix composite material 2 containing the metal ceramic preforms, and preparing the metal ceramic composite material lining plate;
the method comprises the following specific steps:
1) Determining a casting process: adopting a lost foam insert casting process;
2) Preparing a matched sand box, a dried mould and a metal ceramic prefabricated body;
3) And landfill modeling: the steel nails 3 are welded on the surface of the metal ceramic prefabricated body, so as to prevent the metal ceramic prefabricated body from being washed and displaced by molten steel during pouring, and are sequentially embedded into the die body in a clearance arrangement mode, and the steel nails are exposed outside the die body 4 and used for positioning the prefabricated body; the prefabricated body is recessed 2 to 5mm from the surface of the mold and is sealed by a mold cover plate 5; the mould is immersed in the coating for three times and dried for three times, so that the coating is uniformly and compactly covered, and the water in the mould and the coating is completely removed; when the mould is immersed in the coating for three times, the viscosity of the coating is respectively prepared according to the thickness, the normal thickness and the thin thickness;
a bottom pouring type pouring system is selected to ensure that the mold is liquefied in order and molten steel is stably filled; in order: bottom sand, molding, sand adding, secondary sand adding 9 to full, vibration, negative pressure evacuation, film covering and floating sand adding; in the landfill process, once the paint on the surface of the die is found to be damaged, the adhesive tape is used for adhering and repairing and paint is applied, and then the electric blower is used for drying; and vacuumizing under negative pressure to compact the sand and position the metal ceramic prefabricated body welded with the steel nails.
4) Smelting and pouring: smelting production by adopting an intermediate frequency electric furnace, and discharging and pouring after final deoxidation; controlling the tapping temperature at 1430-1480 ℃, and after calming molten steel for several minutes, pouring, wherein the pouring temperature is controlled at 1350-1420 ℃;
when molten steel is poured, the sand box is vacuumized to form a certain negative pressure, the mold is quickly gasified, the molten steel slowly occupies the position of the mold, and the metal ceramic prefabricated body is tightly wrapped; under the thermal action of high-temperature molten steel, the surface metal of the prefabricated part reacts with the molten steel; after the molten steel is solidified and cooled, the molten steel is compounded and molded with the prefabricated body to obtain a reinforced metal matrix composite material containing the metal ceramic prefabricated body;
5) A liner plate is made of a reinforced metal matrix composite material containing a cermet preform.
The metal ceramic composite material lining plate comprises a lining plate which is provided with a bolt hole 6; the lining plate is made of reinforced metal matrix composite material containing a metal ceramic preform; the metal ceramic preform is prepared by uniformly stirring and mixing a binder, metal powder and ceramic particles according to the mass ratio of 0.4.
The metal ceramic prefabricated body is obtained by the following method: uniformly mixing a binder, ceramic particles and metal powder by a stirrer according to the mass ratio of the binder to the metal powder to the ceramic particles being 0.4 to 7 to 0.5, uniformly adhering the metal powder to the surfaces of the ceramic particles by using the binder to obtain the metal ceramic particles coated by the binder, and forming coating layers with good wettability with molten metal on the surfaces of the ceramic particles; filling the obtained mixed material into a die, taking out the shaped material after stamping and shaping, and drying to obtain a metal ceramic preform, wherein the drying conditions are as follows: and raising the temperature to 200-250 ℃, wherein the heating rate is 80-150 ℃/h, raising the temperature to a set temperature, and then cooling to the normal temperature along with the furnace.
The ceramic particles have a particle size of 10-20 meshes, and the ceramic material is: zirconia corundum, black corundum, silicon carbide, boron carbide or titanium carbide;
the adhesive is as follows: one or more than two of water glass and silica sol inorganic binder are mixed according to any proportion;
the metal powder is FeCrC self-fluxing alloy powder, the addition amount of the metal powder is 25-35% of the mass of the ceramic particles, and the powder granularity is 0.5-30um.
The metal ceramic prefabricated body is of a honeycomb structure, the honeycomb hole pattern is circular or regular polygon, the wall thickness among all the honeycomb holes ranges from 4 to 30mm, and the thickness of the metal ceramic prefabricated body ranges from 5 to 110mm. FIG. 3 is a schematic structural diagram of porous cermet preforms with different pore-type structures. And the group of metal ceramic prefabricated bodies are uniformly distributed along the axial direction and the radial direction.
Fig. 4 is a schematic view of the assembly of the metal ceramic composite lining plate and the device body 7 in the present invention. The metal ceramic composite material lining plate is connected with the body through a bolt. The bolt hole of the lining plate and the bolt hole of the equipment body are fastened by bolts. By adopting the structure, the replaceable lining plate is arranged at the position easy to wear, and the impact force generated by the solid material to the body in work is borne by the replaceable lining plate, so that the service life of the body is prolonged. When this removable welt damaged, the operator can loosen the change welt with the bolt of welt connection, has avoided the maintenance work of dismantling the body, has saved manpower and materials.
According to the method, the bonding strength of the ceramic particles and the metal matrix is enhanced through the organic combination of the molten metal and the honeycomb metal ceramic, the wear resistance is improved, the workload and the cost of frequent replacement are reduced, and the method is energy-saving and environment-friendly. The invention is suitable for easily-worn parts of mining equipment.

Claims (6)

1. A preparation method of a replaceable metal ceramic composite material lining plate is characterized by comprising the following steps: placing a group of metal ceramic preforms at a cavity corresponding to the reinforcing surface of the lining plate, pouring molten metal into a casting mold, cooling and solidifying to obtain a reinforced metal matrix composite material containing the metal ceramic preforms, and preparing the metal ceramic composite material lining plate;
the method comprises the following specific steps:
1) Determining a casting process: adopting a lost foam insert casting process;
2) Preparing a matched sand box, a dried mould and a metal ceramic prefabricated body;
3) And landfill modeling: welding steel nails on the surface of the metal ceramic prefabricated body to prevent the metal ceramic prefabricated body from being washed and shifted by molten steel during pouring, sequentially embedding the metal ceramic prefabricated body into the die body in a clearance arrangement mode, and exposing the steel nails outside the die body for positioning the prefabricated body; the prefabricated body is recessed by 2 to 5mm from the surface of the mold and is sealed by a mold cover plate; the mould is immersed in the coating for three times and dried and aired for three times, so that the coating is uniformly and compactly covered, and meanwhile, the water in the mould and the coating is completely removed; when the mould is immersed in the coating for three times, the viscosity of the coating is respectively prepared according to the thickness, the normal thickness and the thin thickness;
a bottom pouring type pouring system is selected to ensure that the molds are liquefied in sequence and molten steel is stably filled; in order: bottom sand, molding, sand adding, secondary sand adding 9 to full, vibration, negative pressure evacuation, film covering and floating sand adding; in the landfill process, once the paint on the surface of the die is found to be damaged, the adhesive tape is used for adhering and repairing and paint is applied, and then the electric blower is used for drying; vacuumizing under negative pressure to compact the sand and position the metal ceramic prefabricated body welded with the steel nails;
4) Smelting and pouring: smelting production by adopting an intermediate frequency electric furnace, and discharging and pouring after final deoxidation; controlling the tapping temperature at 1430-1480 ℃, and casting after the molten steel is calmed for several minutes, wherein the casting temperature is controlled at 1350-1420 ℃;
when molten steel is poured, the sand box is vacuumized to form a certain negative pressure, the mold is quickly gasified, the molten steel slowly occupies the position of the mold, and the metal ceramic prefabricated body is tightly wrapped; under the thermal action of high-temperature molten steel, the surface metal of the prefabricated part reacts with the molten steel; after the molten steel is solidified and cooled, the molten steel is compounded and molded with the prefabricated body to obtain a reinforced metal matrix composite material containing the metal ceramic prefabricated body;
5) A liner plate is made from a reinforced metal matrix composite material containing a cermet preform.
2. The method of making a replaceable cermet composite liner plate as set forth in claim 1 wherein: the metal ceramic preform is prepared by uniformly stirring and mixing a binder, metal powder and ceramic particles according to the mass ratio of (0.4).
3. The method of making a replaceable cermet composite liner plate as set forth in claim 1 or 2 wherein: the metal ceramic prefabricated body is obtained by the following steps: uniformly mixing a binder, ceramic particles and metal powder by a stirrer according to the mass ratio of the binder to the metal powder to the ceramic particles being 0.4 to 7 to 0.5, uniformly adhering the metal powder to the surfaces of the ceramic particles by using the binder to obtain the metal ceramic particles coated by the binder, and forming coating layers with good wettability with molten metal on the surfaces of the ceramic particles; filling the obtained mixed material into a die, taking out the shaped material after stamping and shaping, and drying to obtain a metal ceramic preform, wherein the drying conditions are as follows: and raising the temperature to 200-250 ℃, wherein the heating rate is 80-150 ℃/h, raising the temperature to a set temperature, and then cooling to the normal temperature along with the furnace.
4. The method of making a replaceable cermet composite liner plate as set forth in claim 3 wherein: the ceramic particles have a particle size of 10-20 meshes, and are made of the following materials: zirconia corundum, black corundum, silicon carbide, boron carbide or titanium carbide;
the adhesive is as follows: one or more than two of water glass and silica sol inorganic binder are mixed according to any proportion;
the metal powder is FeCrC self-fluxing alloy powder, the addition amount of the metal powder is 25-35% of the mass of the ceramic particles, and the powder granularity is 0.5-30um.
5. The method of making a replaceable cermet composite liner plate as set forth in claim 1 wherein: the metal ceramic prefabricated body is of a honeycomb structure, honeycomb holes are round or regular polygons, the wall thickness among the honeycomb holes is 4-30mm, and the thickness of the metal ceramic prefabricated body is 5-110mm.
6. The method of making a replaceable cermet composite liner plate as set forth in claim 1 wherein: the metal component in the molten metal is high manganese steel, common carbon steel, cast iron, high chromium steel or heat-resistant steel.
CN202211083302.0A 2022-09-06 2022-09-06 Preparation method of replaceable metal ceramic composite lining plate Pending CN115533079A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211083302.0A CN115533079A (en) 2022-09-06 2022-09-06 Preparation method of replaceable metal ceramic composite lining plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211083302.0A CN115533079A (en) 2022-09-06 2022-09-06 Preparation method of replaceable metal ceramic composite lining plate

Publications (1)

Publication Number Publication Date
CN115533079A true CN115533079A (en) 2022-12-30

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Application Number Title Priority Date Filing Date
CN202211083302.0A Pending CN115533079A (en) 2022-09-06 2022-09-06 Preparation method of replaceable metal ceramic composite lining plate

Country Status (1)

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