CN100386462C - Boron contg. multi-element low alloyed wearable cast steel and prepn. thereof - Google Patents
Boron contg. multi-element low alloyed wearable cast steel and prepn. thereof Download PDFInfo
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Abstract
The present invention discloses boron-containing multiple low-alloy wearable cast steel, which contains the following chemical components (weight %): 0.20 to 0.45 wt% of C, 1.1 to 1.8 wt% of Mn, 0.8 to 1.5 wt% of Si, 0.3 to 1.2 wt% of Cr, 0.05 to 0.20 wt% of B, 0.08 to 0.30 wt% of Ti, 0.03 to 0.20 wt% of N, 0.05 to 0.15 wt% of Ca, 0.04 to 0.15 wt% of K and Fe and inevitable trace impurities for the rest. The present invention is produced by the following steps: scrap steel, ferrosilicon, ferrochromium and ferromanganese are adopted as proportioning materials, carbon is increased by waste graphite electrodes or pig iron, and the molten steel is melted; the temperature of the molten steel is raised to 1620 to 1660 DEG C after the as-fired components are adjusted eligibly, calcium silicon, ferroboron, ferrotitanium and nitrogen-containing ferrochromium are added before tapping, yt base magnesium rare earth alloy and K-containing substance are crushed to blocks whose particle size is less than 15mm after tapping; the blocks are dried at a temperature of 130 to 180 DEG C and loaded to the bottom of a casting ladle, and a compound modification is carried out to the molten steel by a ladle-pouring method, wherein the casting temperature of the molten steel is from 1480 to 1520 DEG C; the castings are austenized at the temperature of 830 to 1050 DEG C for 0.5 to 4 hours and cooled quickly, and the castings are in furnace cooling or air cooling after the temperature is kept between 150 and 300 DEG C for 2 to 6 hours to obtain boron-containing multiple low-alloy wearable cast steel.
Description
Technical field
The invention belongs to the wear-resistant metal material technical field, relate to a kind of wearable cast steel and preparation method thereof, particularly a kind of boron-containing multi-element low alloy wear resistant cast steel that does not contain valuable alloying elements such as molybdenum, nickel and preparation method thereof.
Background technology
Wearing and tearing are many industrial sector ubiquities such as metallurgy, mine, machinery, electric power, coal, oil, traffic, aviation and military project and become a major reason that causes equipment failure or material damage, also be to cause one of maximum problem of financial loss, research and development a new generation high-abrasive material, reduce galling, national economy is had great importance.The high-abrasive material of widespread use at present mainly contains steel alloy and white cast iron, the former good toughness, but have the deficiency that intensity and hardness are low, wear no resistance, the latter has high rigidity and high-wearing feature, but exists fragility big, easily peels off in the use even the rimose deficiency.Therefore, Development and Production technology is simple, low production cost, intensity and the good iron and steel high-abrasive material of new generation of toughness height, hardening capacity and hardenability, replaces widely used common high-abrasive material at present under the abrasive wear operating mode, has crucial meaning undoubtedly.For obdurability and the wear resistance that improves material, usually all to add alloying elements such as molybdenum, nickel, chromium, tungsten, vanadium, in short supply day by day along with alloy resource, molybdenum, nickel, chromium, tungsten, vanadium etc. are becoming tight alloy supply day, price rapidly goes up, and causes common iron and steel high-abrasive material production cost constantly soaring.Japanese Patent JP8144009-A has reported that a kind of high tenacity that contains manganese, nickel, chromium, molybdenum is used to make the wearable cast steel of grinder hammerhead, and (wt.%) is as follows for its chemical constitution: C, 0.3-0.45, Si≤0.5, Mn≤1.2, Ni, 1.5-2.5, Cr, 0.7-2, Mo, 0.4-1.0, surplus Fe and unavoidable impurities, this material has excellent toughness and wear resistance, but contain more expensive nickel and molybdenum, the alloy production cost is increased.USSR (Union of Soviet Socialist Republics) patent SU1650756-A has reported a kind of carbon containing, silicon, manganese, chromium, nitrogen, rare earth, the multi-member low alloy grinding-tolerant steel of calcium in order to improve the performance of matrix, particularly improves wear resistance, the vanadium that also adds some amount, niobium and cobalt, (wt.%) is as follows for its chemical constitution: C, 0.6-0.8, Si, 0.1-0.4, Mn, 0.7-1.7, Cr, 1.3-1.6, N, 0.01-0.03, RE, 0.01-0.027, Ca, 0.001-0.003, V, 1.1-1.5, Nb, 0.6-0.9, Co, 0.3-0.7 surplus Fe and unavoidable impurities are although this alloy material has mechanical property and wear resistance preferably, but add expensive vanadium, niobium and cobalt sharply increase the alloy production cost.USSR (Union of Soviet Socialist Republics) patent SU1650759-A has also reported a kind of multi-element low alloy wear resistant cast steel with cerium and barium substitute niobium and molybdenum, and (wt.%) is as follows for its chemical constitution: C, 0.5-0.9, Si, 0.5-1.0, Mn, 1.5-2.5, Cr, 2.5-3.5, Ti, 0.05-0.15, V, 0.1-0.5, B, 0.002-0.008, Ca, 0.01-0.03, Al, 0.01-0.05, Ce, 0.05-0.20, Ba, 0.002-0.006, surplus Fe and unavoidable impurities.This alloy has higher carbon content and wear resistance preferably, but has intensity low (710-750MPa) and the low (125-138kJ/m of impelling strength
2) deficiency, use that can't be safe and reliable under the HI high impact operating mode.USSR (Union of Soviet Socialist Republics) patent SU1565915-A has also reported the wear-resisting multicomponent Alloy Cast Steel manufacture method that a kind of silicomanganese chromium content is higher, and (wt.%) is as follows for its chemical constitution: C, 0.5-0.7, Si, 2.1-3.8, Mn, 2.5-5.0, Cr, 5.0-7.0, Mo, 0.20-0.5, V, 0.05-0.5, Ca, 0.003-0.03, N, 0.005-0.06, Ti, 0.07-0.85, surplus Fe and unavoidable impurities.Its hardness reaches more than the HRC59, has excellent abrasive, and alloy adding such as this alloy material silicon, manganese, chromium are many, the manufacturing cost height, and also welding property is also relatively poor.Chinese invention patent CN1033845A has reported a kind of high-tenacity low-carbon microalloyed cast steel, and it is an alloying element with carbon, manganese, titanium, niobium, rare earth etc., and (wt.%) is as follows for its chemical constitution: C, 0.06-0.18; Mn, 1.4-1.8; Nb, 0.02～0.12; Ti, 0.01～0.10; RE, 0.002～0.06; Mo＜0.3; Al＜0.06; S＜0.035; P＜0.035, surplus Fe and unavoidable impurities.Normalizing-tempering or homo genizing annelaing-normalizing-tempering process are adopted in its thermal treatment.Cast steel of the present invention has high toughness and plasticity, but carbon content is too low, has the deficiency that intensity and hardness are low and wear no resistance, and tensile strength is less than 750MPa, and yield strength is less than 650MPa.Chinese invention patent CN1182142 provides a kind of wearable cast steel, is main alloy element with carbon, chromium, molybdenum, auxilliary a small amount of vanadium, titanium and trace rare-earth and the boron alloy element of adding.Its chemical composition content is (wt.%): C, 0.15-0.50; Si≤0.50; Mn≤1.0; Cr, 1.0-2.0; Mo, 0.2-0.5; V, 0.02-0.10; Ti, 0.02-0.10; B, 0.005-0.10; S, 0.05-0.50; P≤0.04.Surplus Fe and unavoidable impurities.This Alloy Cast Steel after heat treatment, its microstructure is that martensite adds bainite and a spot of residual austenite, has good obdurability and wear resistance, improve 1 times or more than high mangaenese steel work-ing life, but contain expensive molybdenum, will increase production cost.
Summary of the invention
The present invention seeks to provide a kind of boron-containing multi-element low alloy wear resistant cast steel that does not contain expensive alloy element such as molybdenum, nickel, silicon, manganese with cheapness are main alloy element, and add an amount of chromium, the boron, titanium and the nitrogen that add some amount on this basis, the main purpose that adds boron, titanium and nitrogen is in order to obtain tiny TiB
2And Ti (C N), improves the intensity and the wear resistance of cast steel, and part of boron and nitrogen dissolve in matrix, can obviously improve the hardening capacity of steel.Add elements such as micro-calcium, potassium, yttrium and magnesium in addition, the total add-on of alloy is controlled in 5%, obtains intensity and hardness height, toughness and wear resistance are good, production technique is simple, production cost is low and the high-strength and high ductility of good welding performance does not have molybdenum, nickel low-alloy wear-resistant steel.
In order to achieve the above object, the present invention takes following technical solution:
A kind of boron-containing multi-element low alloy wear resistant cast steel, its chemical composition are (weight %):
C, 0.20～0.45; Mn, 1.1～1.8; Si, 0.8～1.5; Cr, 0.3～1.2; B, 0.05～0.20; Ti, 0.08～0.30; N, 0.03～0.20; Ca, 0.05～0.15; K, 0.04～0.15; Y, 0.08～0.25; Mg, 0.03～0.12; All the other are Fe and unavoidable impurities.
Boron-containing multi-element low alloy wear resistant cast steel of the present invention adopts electrosmelting, its manufacturing technology steps is: at first with steel scrap, ferrosilicon, ferrochrome, ferromanganese batching, with barren rock electrode ink or pigging up, molten steel fusing, stokehold be adjusted to branch qualified after, liquid steel temperature is risen to 1620～1660 ℃, add silicocalcium, ferro-boron, ferrotianium before coming out of the stove and contain nitrogenous ferrochrome, then come out of the stove.With the Yttrium base rare earth magnesium alloy with contain the potassium material and be crushed to the fritter of granularity less than 15mm, after 130～180 ℃ of oven dry, place the casting ladle bottom, with pouring method in wrapping the molten steel composite inoculating is handled.After rotten the processing, pouring molten steel is become foundry goods, 1480～1520 ℃ of pouring molten steel temperature.Foundry goods cools off behind 830～1050 ℃ * (0.5～4) h austenitizing fast, and the cold or air cooling of stove behind 150 ℃～300 ℃ insulations (2～6) h can obtain the good boron-containing low alloy wear-resistant cast steel of intensity and hardness height, toughness and wear resistance subsequently.
Boron-containing multi-element low alloy wear resistant cast steel of the present invention compared with prior art, principal feature is as follows:
1. not containing expensive alloy element such as molybdenum, nickel, is main alloy element with manganese, silicon, adds to be no more than 1.2% chromium, and adds an amount of boron, titanium and nitrogen, has obtained tiny TiB
2And Ti (C, N) particle improve the intensity and the wear resistance of cast steel.Add elements such as micro-calcium, potassium, yttrium and magnesium in addition, the total add-on of alloy is controlled in 5%, and elements such as calcium, potassium, yttrium and magnesium purify and the tissue of refinement cast steel, obviously improves the mechanical property of cast steel.
2. matrix contains a large amount of trickle austenite films based on martensite between martensite lath, makes material keep also having good toughness under the prerequisite of high strength and high rigidity.
3. adopt method melting and the casting identical with 45 steel, thermal treatment process is simple.
4. main mechanical property is as follows:
Tensile strength sigma
b〉=1600MPa, hardness 〉=HRC52, impelling strength α
k〉=1500kJ/m
2, fracture toughness property K
1c〉=100MPa.m
1/2
5. has good welding property.
6. under the same terms, wear resistance improves 3～5 times than high mangaenese steel, than the steel alloy raising 30%～80% of nickeliferous and molybdenum.
Embodiment
The invention will be further described below in conjunction with embodiment:
Boron-containing multi-element low alloy wear resistant cast steel of the present invention, its chemical composition are (weight %): C, 0.20%～0.45%; Mn, 1.1%～1.8%; Si, 0.8%～1.5%; Cr, 0.3%～1.2%; B, 0.05%～0.20%; Ti, 0.08%～0.30%; N, 0.03%～0.20%; Ca, 0.05%～0.15%; K, 0.04%～0.15%; All the other are Fe and unavoidable impurities.
Main alloy element silicon, manganese, chromium satisfy following relation:
3.0％＜Si+Mn+Cr＜4.5％；
Main alloy element silicon, manganese, chromium and assistant alloy element boron, titanium, nitrogen, calcium, potassium, yttrium and magnesium satisfy following relation:
3.5％＜Si+Mn+Cr+B+Ti+N+Ca+K+Y+Mg＜5.0％。
The performance of alloy material is by the metallographic structure decision, and certain tissue depends on chemical ingredients and thermal treatment process, and chemical ingredients of the present invention is to determine like this:
Carbon: carbon can obviously improve the hardenability of steel, improve the intensity and the hardness of steel, improve the wear resistance of steel, carbon content is too high, can occur the big high carbon martensite of fragility in the steel, and the toughness of steel and plasticity are descended, simultaneously, the carbon content increase also can worsen the welding property of steel, takes all factors into consideration, and carbon content is controlled at 0.20%～0.45%.
Manganese: manganese is basic alloying element in wearable cast steel, but solid solution in iron, reduce γ-α transition temperature and postpone transformation time, improve the hardening capacity of steel.Manganese content too much makes steel crystal grain when high temperature austenite be easy to the alligatoring of growing up, and in addition, manganese also increases the temper brittleness of steel, therefore, among the present invention manganese content is controlled at 1.1%～1.8%.
Silicon: the remaining content of the silicon that the reductor that uses in the steelmaking process is brought into has the alloying action of strengthening matrix, and yield strength is improved.Silicon reduces the solubleness of carbon in austenite, impels carbide to go out along partial crystallization, reduces the toughness of steel, therefore, among the present invention silicone content is controlled at 0.8%～1.5%.
Chromium: chromium has the hardening capacity of solution strengthening, raising steel, the effects such as anti-temper resistance of increase steel.Chromium solubleness in austenite is very big, strengthens austenite but does not reduce toughness.Chromium stops when tempering or delays separating out and assemble of carbide, makes it keep disperseing, and helps improving intensity and hardness, and stable performance.The chromium too high levels is prone to carbide on the crystal boundary, reduce the toughness of steel, therefore, among the present invention chromium content is controlled at 0.3%～1.2%.
Boron: boron adds in the steel as trace element, can significantly improve the hardening capacity of steel, in addition, in the compound adding steel of boron and titanium, can form tiny TiB
2, improve the intensity and the wear resistance of cast steel, add-on is too much, and the fragility of steel is increased, and takes all factors into consideration its content is controlled at 0.05%～0.20%.
Titanium: add trace amount of titanium in steel, obviously refinement cast steel crystal grain reduces dendritic segregation, improves the intensity and the toughness of steel.Major cause be B, N, the C in titanium and the cast steel form high melting compound Ti (C, N) and TiB
2, these compounds help the grain refining of cast steel, make carbon and alloying elements distribution in interdendritic and the dendrite even, can also improve the intensity and the hardness of steel in addition, improve the cast steel wear resistance.Add-on is too much, and titaniferous compound quantity increases and alligatoring, causes the intensity of steel and toughness to descend on the contrary.Take all factors into consideration, titanium content is controlled at 0.08%～0.30%.
Nitrogen: in steel, add trace nitrogen, except forming high melting compound Ti (C, N), improve outside the intensity and hardness of steel, the solid solution of part nitrogen is in matrix, obviously improve the hardening capacity and the hardenability of steel, improve the wear resistance of steel, add-on is too much, is prone to pore in the foundry goods tissue, reduce cast steel characteristic on the contrary, the present invention is controlled at 0.03%～0.20% with nitrogen content.
Calcium: calcium and oxygen have very big avidity, and the deoxidizing capacity of calcium is very strong, and calcium has good degassing effect to molten steel.Calcium also has remarkable effect to inclusion in the cast steel rotten, add an amount of calcium and can change the strip sulfide inclusion in the cast steel into globular CaS or (Ca, Mn) S is mingled with, an amount of calcium also significantly reduces sulphur poly-partially at crystal boundary, and hot-cracking resistance was very useful when calcium was cast reducing cast steel fragility and improving cast steel.Add too much calcium and will make that inclusion increases in the cast steel, it is unfavorable that the cast steel flexible is improved, and the present invention is controlled at 0.05%～0.15% with calcium contents.
Potassium: potassium adds the primary crystal Tc that can reduce steel in the steel, help molten steel cold excessively at liquidus line, and the crystallization condensate depression of alloy increases, nucleation rate is increased, make the cast steel structure refinement, help improving the toughness of steel, but add-on is too much, steel inclusion will be increased, reduce the toughness of steel on the contrary, the present invention is controlled at 0.04%～0.15% with potassium content.
Yttrium: yttrium adds the effect that has desulfurization, degasification in the steel, and according to the thermodynamic condition that inclusion generates, the avidity of yttrium and oxygen and sulphur is significantly greater than manganese and aluminium etc., and the easy and oxygen of yttrium, sulphur generation chemical reaction generate globular Y
2O
2S, Y
2O
3Deng re inclusion, improved the brittle rupture that low-alloy cast steel produces along crystal boundary significantly.Excessive yttrium adds affiliation and causes inclusion to be broken chain distribution, diminishes the plasticity and the toughness of steel on the contrary.In addition, yttrium has bigger atomic radius, and solubleness is very little in iron.Owing to have very big electronegativity, so chemical property is very active, can form a series of very stable compounds in steel, becomes the non-spontaneous crystallization core, thereby plays the effect of crystal grain thinning.In addition, yttrium is a surface active element, can increase crystallization nuclei and produce speed, stops grain growing.The refinement of crystal grain helps that cast steel is moulded, flexible improves.Yttrium reduces the twin crystal martensite amount in addition in dilute-alloy martensite cast steel, increase the effect of lath martensite ratio, improves the intensity of steel and improves the toughness of steel, and the present invention is controlled at 0.08%～0.25% with yttrium content.
Magnesium: magnesium has good deoxidation, desulfurization, cleaning molten steel and improves the effect of inclusion morphology, add an amount of magnesium in the steel and created the thermodynamics and kinetics condition for forming tiny equally distributed compound near-spherical inclusion, can obviously improve the toughness of steel, the present invention is controlled at 0.03%～0.12% with Mg content.
Quenching temperature is the important factor that influences boron-containing multi-element low alloy wear resistant cast steel tissue and performance, quenching temperature is low excessively, austenitizing is incomplete, occurs the pearlitic structure of soft in the quenching structure, reduces the mechanical property and the wear resistance of boron-containing multi-element low alloy wear resistant cast steel.Quenching temperature is too high, the quenching structure alligatoring, reduce the intensity and the toughness of boron-containing multi-element low alloy wear resistant cast steel on the contrary, cooling fast behind 830～1050 ℃ of high temperature austeniteizations and insulation (0.5～4) h, can obtain tiny lath martensite tissue, behind 150～300 ℃ of insulations (2～6) h, can get tempering lath martensitic stucture subsequently, have high strength, high tenacity and excellent abrasive.
Embodiment 1:
The boron-containing multi-element low alloy wear resistant cast steel of present embodiment adopts the melting of 500kg medium-frequency induction furnace.At first, use pigging up with steel scrap, ferrosilicon, ferrochrome, ferromanganese batching, molten steel fusing, stokehold be adjusted to branchs qualified after, temperature is risen to 1630 ℃, preceding adding silicocalcium, ferro-boron, the ferrotianium and contain nitrogenous ferrochrome of coming out of the stove then come out of the stove.With the Yttrium base rare earth magnesium alloy with contain the potassium material and be crushed to the fritter of granularity less than 15mm, after 160 ℃ of oven dry, place the casting ladle bottom, with pouring method in wrapping the molten steel composite inoculating is handled.After rotten the processing, pouring molten steel is become foundry goods, 1490 ℃ of pouring molten steel temperature.Foundry goods cools off behind 960 ℃ * 1h austenitizing fast, and stove is cold behind 280 ℃ of insulation 2.5h subsequently.The cast steel composition sees Table 1, and its mechanical property sees Table 2.
Table 1 boron-containing multi-element low alloy wear resistant cast steel composition (wt%)
| C | Mn | Si | Cr | B | Ti | N | Ca | K | Y | Mg | Fe |
| 0.23 | 1.73 | 0.99 | 0.84 | 0.12 | 0.19 | 0.04 | 0.07 | 0.13 | 0.11 | 0.07 | Surplus |
Table 2 boron-containing multi-element low alloy wear resistant cast steel mechanical property
| Hardness (HRC) | Tensile strength (MPa) | Impelling strength (kJ/m 2) | Fracture toughness property (MPa.m 1/2) |
| 52.7 | 1628 | 1649 | 108.3 |
Embodiment 2:
The 1500kg arc melting of the boron-containing multi-element low alloy wear resistant cast steel of present embodiment.At first with steel scrap, ferrosilicon, ferrochrome, ferromanganese batching, with the carburetting of barren rock electrode ink, molten steel fusing, stokehold be adjusted to branchs qualified after, temperature is risen to 1655 ℃, adding silicocalcium, ferro-boron, ferrotianium and contain nitrogenous ferrochrome before coming out of the stove then come out of the stove.With the Yttrium base rare earth magnesium alloy with contain the potassium material and be crushed to the fritter of granularity less than 15mm, after 150 ℃ of oven dry, place the casting ladle bottom, with pouring method in wrapping the molten steel composite inoculating is handled.After rotten the processing, pouring molten steel is become foundry goods, 1508 ℃ of pouring molten steel temperature.Foundry goods cools off behind 880 ℃ * 3.5h austenitizing fast, subsequently air cooling behind 160 ℃ of insulation 5h.The cast steel composition sees Table 3, and its mechanical property sees Table 4.
Table 3 boron-containing multi-element low alloy wear resistant cast steel composition (wt%)
| C | Mn | Si | Cr | B | Ti | N | Ca | K | Y | Mg | Fe |
| 0.41 | 1.14 | 1.47 | 0.59 | 0.08 | 0.23 | 0.12 | 0.12 | 0.06 | 0.23 | 0.11 | Surplus |
Table 4 boron-containing multi-element low alloy wear resistant cast steel mechanical property
| Hardness (HRC) | Tensile strength (MPa) | Impelling strength (kJ/m 2) | Fracture toughness property (MPa.m 1/2) |
| 53.2 | 1673 | 1535 | 102.8 |
Get the grinder hammerhead of the boron-containing multi-element low alloy wear resistant cast steel manufacturing of the foregoing description, broken granite on hammer mill, improve 3.8 times than high mangaenese steel tup work-ing life, suitable with the rich chromium cast iron tup, and overcome the deficiency that the rich chromium cast iron tup easily peels off and ruptures, price is lower than rich chromium cast iron tup.The tup that uses boron-containing multi-element low alloy wear resistant cast steel to make can be saved servicing time, reduces and shuts down number of times, improves equipment operation rate, reduces the broken cost of building stones.
Get the ball grinding machine lining board of the boron-containing multi-element low alloy wear resistant cast steel manufacturing of the foregoing description, the grinding machine specification has φ 1.5m, φ 2.1m and φ 4.5m three classes.Found that, the boron-containing multi-element low alloy wear resistant cast steel liner plate is safe in utilization, reliable, do not occur in the use peeling off and rupturing, its work-ing life and high chrome cast iron lining plate are suitable with the ni-hard cast iron liner plate, production cost is lower more than 40% than high chrome cast iron lining plate and ni-hard cast iron liner plate, improve 3～5 times than high manganese steel lining plate work-ing life, and price and high mangaenese steel are suitable.Use the present invention to make liner plate and have good economic benefits.
Claims (2)
1. a boron-containing multi-element low alloy wear resistant cast steel is characterized in that, the boron-containing multi-element low alloy wear resistant cast steel that makes is made up of the chemical ingredients of following weight percent: C, 0.20%～0.45%; Mn, 1.1%～1.8%; Si, 0.8%～1.5%; Cr, 0.3%～1.2%; B, 0.05%～0.20%; Ti, 0.08%～0.30%; N, 0.03%～0.20%; Ca, 0.05%～0.15%; K, 0.04%～0.15%; Y, 0.08%～0.25%; Mg, 0.03%～0.12%; All the other are Fe and inevitable trace impurity;
Main alloy element silicon, manganese, chromium satisfy following relation: 3.0%＜Si+Mn+Cr＜4.5%;
Main alloy element silicon, manganese, chromium and assistant alloy element boron, titanium, nitrogen, calcium, potassium, yttrium and magnesium satisfy following relation: 3.5%＜Si+Mn+Cr+B+Ti+N+Ca+K+Y+Mg＜5.0%.
2. the preparation method of the described boron-containing multi-element low alloy wear resistant cast steel of claim 1, it is characterized in that, this method adopts electrosmelting, at first use steel scrap, ferrosilicon, ferrochrome, the ferromanganese batching, with barren rock electrode ink or pigging up, the molten steel fusing, the stokehold be adjusted to branch qualified after, liquid steel temperature is risen to 1620 ℃～1660 ℃, add silicocalcium before coming out of the stove, ferro-boron, ferrotianium and contain nitrogenous ferrochrome, then come out of the stove, with the Yttrium base rare earth magnesium alloy with contain the potassium material and be crushed to the fritter of granularity less than 15mm, after 130～180 ℃ of oven dry, place the casting ladle bottom, with pouring method in the bag molten steel composite inoculating is handled, after the processing pouring molten steel is become foundry goods, 1480 ℃～1520 ℃ of pouring molten steel temperature; After the foundry goods moulding, behind (830 ℃～1050 ℃) * (0.5～4) h austenitizing and fast cooling, the cold or air cooling of stove can obtain boron-containing multi-element low alloy wear resistant cast steel behind 150 ℃～300 ℃ insulation 2h～6h subsequently.
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| CN104651731B (en) * | 2015-02-12 | 2016-07-06 | 北京工业大学 | A kind of large-size ball mill liner plate and preparation method thereof |
| CN104975218B (en) * | 2015-05-22 | 2017-03-01 | 北京工业大学 | Casting B alloy of Fe containing chromium and preparation method thereof |
| CN109097695B (en) * | 2018-09-27 | 2020-10-02 | 宁国东方碾磨材料股份有限公司 | Alloy material for excavator bucket teeth and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032198A (en) * | 1988-10-19 | 1989-04-05 | 乐山冶金机械轧棍厂 | The vanadium and titanium containing low-manganese wear resisting steel |
-
2006
- 2006-04-13 CN CNB2006100426781A patent/CN100386462C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032198A (en) * | 1988-10-19 | 1989-04-05 | 乐山冶金机械轧棍厂 | The vanadium and titanium containing low-manganese wear resisting steel |
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