CN103436773A - Preparation method of wear-resistant high-chromium cast iron - Google Patents

Preparation method of wear-resistant high-chromium cast iron Download PDF

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CN103436773A
CN103436773A CN2013103673390A CN201310367339A CN103436773A CN 103436773 A CN103436773 A CN 103436773A CN 2013103673390 A CN2013103673390 A CN 2013103673390A CN 201310367339 A CN201310367339 A CN 201310367339A CN 103436773 A CN103436773 A CN 103436773A
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iron
cast iron
chromium cast
molten
alloy
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CN103436773B (en
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符寒光
智小慧
雷永平
林健
吴中伟
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北京工业大学
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Abstract

The invention discloses a preparation method of wear-resistant high-chromium cast iron and belongs to the technical field of metal materials. According to the preparation method, common scrap steel, carburant, ferrochromium, ferromolybdenum, copper plates, ferrochromium nitride, ferrosilicon, ferromanganese, ferroboron and aluminum are smelted in an electric furnace so as to form the wear-resistant high-chromium cast iron. The molten wear-resistant high-chromium cast iron comprises the following chemical components in percentage by mass: 3.0-3.5% of C, 18-25% of Cr, 0.3-0.5% of Mn, 0.3-0.5% of Si, 0.18-0.25% of N, 0.5-0.8% of Mo, 0.2-0.4% of B, 0.08-0.12% of Al, 0.5-1.0% of Cu, less than 0.05% of S, less than 0.05% P and the balance of Fe. Molten iron is treated with an inoculator when taken out from the electric furnace, and is treated with a suspending agent when poured, so as to obtain fine solidification structures. Therefore, the wear-resistant high-chromium cast iron has excellent properties.

Description

A kind of antiwear high-chromium cast iron preparation method

Technical field

The present invention is a kind of rich chromium cast iron preparation method, and particularly a kind of employing Suspension Foundry and current-following inoculation are processed abrasion-resistant cast rich chromium cast iron method, belong to the metallic substance technical field.

Background technology

High-chromium white cast iron is described as the best abrasive wear resistant weld deposit material in the present age, along with the development of producing, presses chromium content span of control, usually adopts Cr15, Cr20, tri-series of Cr25.For meeting different working condition requirements, except adjusting carbon content, also be aided with other alloying element, as nickel, tungsten, molybdenum etc., form the multicomponent alloy rich chromium cast iron.In order to improve the rich chromium cast iron performance, Chinese invention patent CN102220541A discloses a kind of rich chromium cast iron of the SiC of containing powder, the preparation method of this cast iron and manufacture the method for wear resistance castings with this kind of cast iron materials, the technical scheme adopted is: a kind of rich chromium cast iron containing the SiC powder, it is characterized in that: described SiC powder is 99.9%SiC, mean particle size is the 20-40 nanometer, the SiC powder accounts for the 3-6% of described rich chromium cast iron gross weight, described rich chromium cast iron also comprises 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si, 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni, 0.04-0.09%V, 0.011-0.031%S, 0.018-0.030%P.Beneficial effect is: 1) the SiC powder improves the wear resistance of foundry goods greatly.2) utilize the SiC powder to strengthen high chromium cast iron material, can form the wear-resisting shot blasting device blades of rich chromium cast iron of anti-HI high impact frictional wear.Therefore, utilize the SiC nano-powder both can change rich chromium cast iron crystal growth morphology, change martensitic growthhabit, greatly improve the hardness of material; Can improve the friction and wear behavior under material at high temperature again, obviously play the effect of opposing high temperature friction and wear.Chinese invention patent CN101012526 also discloses a kind of rare earth multicomponent micro-alloying high-chromium cast iron and uses thereof.It is undesirable with wear resistance and the work-ing life of steel that it has solved current domestic extrusion roll, can not meet need of production, and the problems such as import equipment high cost, have and obviously improve in higher thermohardening, hot strength, thermal fatigue strength, wear resistance and work-ing life, the advantages such as machining property is good, can meet the needs of extrusion roll.The chemical composition of this cast iron contains by weight, carbon 1.0-3.5 part, chromium 8.0-26.0 part, nickel 0.5-4.5 part, molybdenum 0.15-2.0 part, copper 0.5-2.0 part, aluminium 0.05-2.0 part, vanadium 0.03-0.3 part, rare earth 0.005-0.20 part, silicon≤0.5 part, manganese≤0.7 part, sulphur≤0.05 part, phosphorus≤0.05 part, surplus is iron.Chinese invention patent CN102212740A also discloses containing VN, TiN powder rich chromium cast iron, this cast iron preparation method and wearing piece, the technical scheme adopted is: a kind of containing VN, TiN powder rich chromium cast iron, it is characterized in that: described VN, the TiN powder is the TiN that the purity VN that is 99.5% and purity are 99.3%, it is the VN of 2-4% and the TiN of 2-4% that described powder accounts for the rich chromium cast iron weight percentage, described rich chromium cast iron also comprises 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si, 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni, 0.04-0.09%V, 0.011-0.031%S, 0.018-0.030%P, the body material that surplus is iron.Beneficial effect is: this beneficial effect of the invention is: VN and TiN powder can be used as the forming core core that rich chromium cast iron molten metal matrix and carbide solidify, and greatly improve the wear resistance of foundry goods; Utilize VN and TiN powder to strengthen high chromium cast iron material, can form the wear-resisting shot blasting device blades of anti-HI high impact frictional wear rich chromium cast iron; VN and TiN powder adopt addition method in stove, and the nano particle added has on the one hand played strengthening effect, and what in stove, add on the other hand is argon gas, has protected molten metal.Chinese invention patent CN1769508 also discloses a kind of hypereutectic high chromium cast iron and manufacture method thereof, the main component of hypereutectic high chromium cast iron is: C:3.5~4.5%, Mn:1.0~3.0%, Cr:17~30%, Si:0.5~1.5%, Cu:1.0~2.0%, P :≤0.06%, S :≤0.06%, Ni :≤1%, surplus is iron.Its preparation method is to adopt the rotten method refinement primary carbide of processing of late inoculation, and the particles such as TiN, NbN that in bag, the master alloy of nucleating agent contains, as the matrix that promotes the primary carbide forming core, increase the number of nuclei of primary carbide.Rare earth, magnesium and potassium etc. are enriched in the surface of primary carbide, make its refinement, group's nodularization.The effect of random inoculant is greatly to accelerate solidifying of alloy, makes primary carbide have little time to grow up, thereby reaches the purpose of refinement primary carbide.The Wet Parts of slurry pump of manufacturing with hypereutectic high chromium cast iron, production technique is easy, cost is low, and castibility is good, has good wear resistance and high work-ing life.Chinese invention patent CN101173340 also discloses a kind of as cast condition high carbon and high chromium cast iron and preparation method thereof, and the high carbon and high chromium cast iron chemical composition is (% by weight): 4.5-5.5C, 22.5-30.8Cr, 3.0-5.0V, 0.7-1.2Mn, 0.2-0.5Nb, 0.5-1.0Ti, 0.08-0.20Mg, 0.05-0.20Na, 0.05-0.20RE, Si<1.0, all the other are Fe and inevitable trace impurity, and 5.0≤chromium carbon ratio (Cr/C)≤5.6.But this invention as cast condition high carbon and high chromium cast iron electric furnace production, cast iron tapping temperature 1440-1480 ℃, breed with the vanadium iron particle while coming out of the stove, and carry out the composite inoculating processing with magnesium-rare earth and sodium salt, and the molten iron pouring temperature is 1350-1380 ℃.This invention high carbon and high chromium cast iron carries out can directly using after the stress relief annealing processing under 200-280 ℃, does not need high-temperature heat treatment, and energy consumption is low, with short production cycle, and good casting property, also has high rigidity and excellent wear resistance.Chinese invention patent CN101580913 also discloses high-chromium cast iron composite inoculant and its preparation method and application and has related to the cast iron alloy containing chromium, this high-chromium cast iron composite inoculant is a kind of high-chromium cast iron composite inoculant of nanocrystalline rare earth ferrosilicon+ferro-boron, by Fe-Ce-Si-Ca master alloy and Fe-B master alloy, formed, its weight ratio is the Fe-Ce-Si-Ca master alloy: Fe-B master alloy=1:0.07~0.13, the nanocrystalline crystal grain of this nucleating agent is less than 100nm, to be that raw material carries out the laminar nucleating agent that the melt-spun processing obtains by being purchased rare earth ferrosilicon+be purchased ferro-boron, with it, engineering machinery is carried out to crystal grain and structure refinement processing with the high-chromium cast iron alloy tissue of rich chromium cast iron wearing piece, treatment process is the metal melting casting, overcome the casting flaw of existing high-chromium cast iron alloy foundry engieering, matrix grain is able to remarkable refinement mutually with cementite, thereby improved significantly the comprehensive mechanical property of high-chromium cast iron alloy.Chinese invention patent CN101503013 also discloses a kind of high-chromium cast iron composite wear-resistant material and has consisted of basic unit, transition layer, wearing layer, and described basic unit is soft steel; Transition layer is copper alloy; Wearing layer is rich chromium cast iron, and its production technique is: basic unit, transition layer, wearing layer sectional area is identical, that thickness is different are stacked and placed in special atmosphere oven and are heated to 1100~1300 ℃ successively, insulation, and control is cooled to 100 ℃ and comes out of the stove; Then the gained material is heated to 800~1050 ℃, low-temperaturetempering after quenching.This invention production technique is simple, reasonable in design, different layer thickness combination by high hard formation, transition layer, high-ductility layer and corresponding High temperature diffusion, thermal treatment process are processed, realize high-abrasive material high rigidity, good wear resistance and the combination of toughness, can be widely used in the industries such as mine, cement, brickmaking, electric power, metallurgy, be applicable to the wear-resisting requirement under various bad working environments conditions.Chinese invention patent CN101892417A also discloses the hypereutectic high chromium cast iron that a kind of as cast condition is used, the chemical composition of the hypereutectic high chromium cast iron that this as cast condition is used is by weight percentage: C:3.5~4.5%, Mn:1.0~3.0%, Cr:16.0~28.0%, Si:0.5~1.5%, Ti:2.1~3.0%, P :≤0.06%, S :≤0.06%, surplus is iron.1500~1650 ℃ of the hypereutectic high chromium cast iron tapping temperatures that this as cast condition is used, 1350~1400 ℃ of teeming temperatures, the content of noble metal is few, in as cast condition, directly use, energy consumption is low, with short production cycle, and good casting property, also have higher hardness and good wear resistance.But current succeeded in developing various high-chromium abrasion-proof cast iron ubiquity fragility are large, and precious alloy element add-on is many, the high deficiency of production cost.

Summary of the invention

The objective of the invention is to smelt in later stage and casting process at rich chromium cast iron, add nucleating agent and suspension agent, reach and improve the rich chromium cast iron tissue, improve the purpose of its performance.

Purpose of the present invention can realize by following processing step:

(1) adopt ordinary scrap steel, carburelant, ferrochrome, molybdenum-iron, copper coin, nitrided ferro-chromium, ferrosilicon, ferromanganese, ferro-boron and metallic aluminium melting antiwear high-chromium cast iron in electric furnace, the chemical constitution of antiwear high-chromium cast iron molten iron and massfraction are controlled at: 3.0~3.5%C, 18~25%Cr, 0.3~0.5%Mn, 0.3~0.5%Si, 0.18~0.25%N, 0.5~0.8%Mo, 0.2~0.4%B, 0.08~0.12%Al, 0.5~1.0%Cu, S<0.05%, P<0.05%, surplus is Fe.When rising to 1530~1560 ℃, molten iron temperature comes out of the stove;

(2) when molten iron is come out of the stove, add the master alloy that accounts for molten steel quality mark 1.5~2.5% as nucleating agent, current-following inoculation is processed molten iron, molten iron is after standing and the processing of skimming, when temperature is 1400~1430 ℃, directly pour into casting mold, in molten steel pouring course, with molten iron, add the iron alloy ball that accounts for molten steel quality mark 0.8~1.5% as suspension agent;

(3) foundry goods is quenched and temper after sand removal and grinding process, 950~1000 ℃ of quenching temperatures, and soaking time 2~4h, the type of cooling adopts air-cooled, 230~260 ℃ of tempering temperatures, soaking time 8~12h, air cooling after tempering.

Wherein said iron alloy ball is is 2.5~3.0%C by massfraction, 0.3~0.5%Bi, 0.8~1.0%B, 0.6~1.0%Mn, 1.5~3.0%Si, P<0.05%, S<0.05%, the iron alloy of surplus Fe is broken into the iron alloy ball that granularity is 0.5~1.0mm, master alloy is is 2.0~2.5%C by massfraction, 3~5%Ca, 3~5%Ba, 2.5~5.0%Ti, 12.0~15.0%Si, 0.5~1.0%Mn, P<0.04%, S<0.04%, the master alloy of Fe surplus is crushed to the fritter that granularity is 2~5mm, then iron alloy ball and master alloy are after 200~250 ℃ dry 3~4h, be respectively used to Suspension Foundry and inoculation.

When the present invention comes out of the stove at molten iron, add the master alloy that accounts for molten steel quality mark 1.5~2.5% as nucleating agent, current-following inoculation is processed molten iron, and the chemical constitution of master alloy and massfraction are: 2.0~2.5%C, 3~5%Ca, 3~5%Ba, 2.5~5.0%Ti, 12.0~15.0%Si, 0.5~1.0%Mn, P<0.04%, S<0.04%, Fe surplus.After nucleating agent adds molten iron, can increase and solidify core, refinement rich chromium cast iron microstructure.In addition, adding of nucleating agent can reduce the amount of inclusions in molten iron, and improves inclusion morphology and distribution, is conducive to improve the rich chromium cast iron mechanical property, particularly promotes the raising of rich chromium cast iron obdurability.

In addition, the present invention is in casting process, add the iron alloy ball that accounts for molten steel quality mark 0.8~1.5% as suspension agent, chemical constitution and the massfraction of iron alloy ball are: 2.5~3.0%C, 0.3~0.5%Bi, 0.8~1.0%B, 0.6~1.0%Mn, 1.5~3.0%Si, P<0.05%, S<0.05%, surplus Fe.After suspension agent adds molten iron, further thinning solidification structure, improve rich chromium cast iron mechanical property and wear resistance.Fig. 1 is abrasion-resistant cast rich chromium cast iron suspension treatment process schematic diagram.

Effect of the present invention:

1) expensive alloy element such as not nickeliferous in antiwear high-chromium cast iron of the present invention, vanadium, niobium, have lower production cost.

2) antiwear high-chromium cast iron of the present invention is because adopting inoculation and the cast that suspends, and solidified structure is tiny, and mechanical property is good, and wherein macrohardness reaches 63~65HRC, and bending strength reaches 1850~1960MPa, and impelling strength reaches 10J/cm 2above.

3) in antiwear high-chromium cast iron microstructure of the present invention, the high rigidity M that contains volume fraction 35~40% 7c 3the type carbide, have excellent wear resistance, and under identical wearing and tearing (ML-10 pin on disk test) condition, the wear resistance of antiwear high-chromium cast iron of the present invention improves more than 30% than Cr15Mo3 rich chromium cast iron.Both production costs are suitable.

The accompanying drawing explanation

Fig. 1 abrasion-resistant cast rich chromium cast iron suspension treatment process schematic diagram;

The 1-sprue cup, 2-loading hopper, 3-liquid collecting bag, 4-sprue, 5-die cavity.

Embodiment

The invention will be further described for the embodiment provided below in conjunction with accompanying drawing and contriver, but the present invention is not limited to following examples.Fig. 1 is shown in by abrasion-resistant cast rich chromium cast iron suspension treatment process schematic diagram, and die cavity 5 is provided with the sprue 4 communicated, and sprue 4 is provided with the liquid collecting bag 3 communicated, and liquid collecting bag 3 directly is connected with loading hopper 2, and the bag of liquid collecting simultaneously 3 also is connected with sprue cup.

Embodiment 1:

250 kilograms of medium-frequency induction furnace meltings for abrasion-resistant cast rich chromium cast iron of the present invention, its manufacturing technology steps is:

(1) by massfraction, be 2.53%C, 0.48%Bi, 0.81%B, 0.65%Mn, 1.51%Si, 0.039%P, 0.033%S, the iron alloy of surplus Fe is broken into the iron alloy ball that granularity is 0.5~1.0mm, by massfraction, is 2.01%C, 3.12%Ca, 4.85%Ba, 2.62%Ti, 12.07%Si, 0.51%Mn, 0.036%P, 0.021%S, the master alloy of Fe surplus is crushed to the fritter that granularity is 2~5mm, iron alloy ball and master alloy, after 200 ℃ dry 4h, are respectively used to Suspension Foundry and inoculation.

(2) adopt ordinary scrap steel, carburelant, ferrochrome, molybdenum-iron, copper coin, nitrided ferro-chromium, ferrosilicon, ferromanganese, ferro-boron and metallic aluminium melting antiwear high-chromium cast iron in electric furnace, the chemical constitution of antiwear high-chromium cast iron molten iron and massfraction are controlled at: 3.03%C, 18.17%Cr, 0.49%Mn, 0.32%Si, 0.19%N, 0.77%Mo, 0.39%B, 0.09%Al, 0.50%Cu, 0.038%S, 0.044%P, surplus is Fe.When rising to 1532 ℃, molten iron temperature comes out of the stove.

(3) when molten iron is come out of the stove, add the master alloy that accounts for molten steel quality mark 1.5% as nucleating agent, current-following inoculation is processed molten iron, and molten iron, after standing and the processing of skimming, when temperature is 1405 ℃, directly pours into casting mold from sprue cup 1.In molten steel pouring course, from loading hopper 2, add the iron alloy ball that accounts for molten steel quality mark 1.5% as suspension agent, molten iron and suspension agent react in liquid collecting bag 3, then through sprue 4, inject die cavity 5.

(4) foundry goods is quenched and temper after sand removal and grinding process, 950 ℃ of quenching temperatures, and soaking time 4h, the type of cooling adopts air-cooled, 260 ℃ of tempering temperatures, soaking time 8h, air cooling after tempering.

The antiwear high-chromium cast iron performance is in Table 1.

Embodiment 2:

250 kilograms of medium-frequency induction furnace meltings for abrasion-resistant cast rich chromium cast iron of the present invention, its manufacturing technology steps is:

(1) by massfraction, be 2.99%C respectively, 0.33%Bi, 0.98%B, 0.97%Mn, 2.90%Si, 0.036%P, 0.038%S, the iron alloy of surplus Fe is crushed to the iron alloy ball of granularity 0.5~1.0mm, by massfraction, is 2.48%C, 4.92%Ca, 3.01%Ba, 4.80%Ti, 14.99%Si, 0.98%Mn, 0.033%P, 0.017%S, the master alloy of Fe surplus is crushed to the fritter that granularity is 2~5mm, iron alloy ball and master alloy, after 250 ℃ dry 3h, are respectively used to Suspension Foundry and inoculation.

(2) adopt ordinary scrap steel, carburelant, ferrochrome, molybdenum-iron, copper coin, nitrided ferro-chromium, ferrosilicon, ferromanganese, ferro-boron and metallic aluminium melting antiwear high-chromium cast iron in electric furnace, the chemical constitution of antiwear high-chromium cast iron molten iron and massfraction are controlled at: 3.49%C, 24.88%Cr, 0.31%Mn, 0.48%Si, 0.25%N, 0.51%Mo, 0.22%B, 0.11%Al, 0.97%Cu, 0.040%S, 0.043%P, surplus is Fe.When rising to 1559 ℃, molten iron temperature comes out of the stove.

(3) when molten iron is come out of the stove, add the master alloy that accounts for molten steel quality mark 2.5% as nucleating agent, current-following inoculation is processed molten iron, and molten iron, after standing and the processing of skimming, when temperature is 1428 ℃, directly pours into casting mold from sprue cup 1.In molten steel pouring course, from loading hopper 2, add the iron alloy ball that accounts for molten steel quality mark 0.8% as suspension agent, molten iron and suspension agent react in liquid collecting bag 3, then through sprue 4, inject die cavity 5.

(4) foundry goods is quenched and temper after sand removal and grinding process, 980 ℃ of quenching temperatures, and soaking time 3h, the type of cooling adopts air-cooled, 240 ℃ of tempering temperatures, soaking time 10h, air cooling after tempering.The antiwear high-chromium cast iron performance is in Table 1.

Embodiment 3:

250 kilograms of medium-frequency induction furnace meltings for abrasion-resistant cast rich chromium cast iron of the present invention, its manufacturing technology steps is:

(1) by massfraction, be 2.82%C respectively, 0.43%Bi, 0.91%B, 0.73%Mn, 2.36%Si, 0.041%P, 0.035%S, the iron alloy of surplus Fe is crushed to the iron alloy ball of granularity 0.5~1.0mm, by massfraction, is 2.33%C, 4.14%Ca, 3.78%Ba, 3.95%Ti, 14.02%Si, 0.83%Mn, 0.038%P, 0.022%S, the master alloy of Fe surplus is crushed to the fritter that granularity is 2~5mm, iron alloy ball and master alloy, after 230 ℃ dry 4h, are respectively used to Suspension Foundry and inoculation.

(2) adopt ordinary scrap steel, carburelant, ferrochrome, molybdenum-iron, copper coin, nitrided ferro-chromium, ferrosilicon, ferromanganese, ferro-boron and metallic aluminium melting antiwear high-chromium cast iron in electric furnace, the chemical constitution of antiwear high-chromium cast iron molten iron and massfraction are controlled at: 3.30%C, 23.05%Cr, 0.42%Mn, 0.39%Si, 0.21%N, 0.65%Mo, 0.28%B, 0.09%Al, 0.74%Cu, 0.037%S, 0.040%P, surplus is Fe.When rising to 1546 ℃, molten iron temperature comes out of the stove.

(3) when molten iron is come out of the stove, add the master alloy that accounts for molten steel quality mark 2.0% as nucleating agent, current-following inoculation is processed molten iron, and molten iron, after standing and the processing of skimming, when temperature is 1415 ℃, directly pours into casting mold from sprue cup 1.In molten steel pouring course, from loading hopper 2, add the iron alloy ball that accounts for molten steel quality mark 1.2% as suspension agent, molten iron and suspension agent react in liquid collecting bag 3, then through sprue 4, inject die cavity 5.

(4) foundry goods is quenched and temper after sand removal and grinding process, 1000 ℃ of quenching temperatures, and soaking time 2h, the type of cooling adopts air-cooled, 230 ℃ of tempering temperatures, soaking time 12h, air cooling after tempering.The antiwear high-chromium cast iron performance is in Table 1.

Table 1 antiwear high-chromium cast iron performance

Mechanical property Macrohardness/HRC Bending strength/MPa Impelling strength/J.cm -2 Embodiment 1 63.4 1935 10.9 Embodiment 2 64.0 1905 10.5 Embodiment 3 64.5 1870 10.6

Antiwear high-chromium cast iron of the present invention is because adopting inoculation and the cast that suspends, and solidified structure is tiny, and mechanical property is good, and wherein macrohardness reaches 63~65HRC, and bending strength reaches 1850~1960MPa, and impelling strength reaches 10J/cm 2above.In antiwear high-chromium cast iron microstructure of the present invention, the high rigidity M that contains volume fraction 35~40% 7c 3the type carbide, there is excellent wear resistance, (ML-10 two body pin on disk tests under identical abrasive conditions, during wearing and tearing with No. 120 quartz water sand paper and sample to mill, wearing and tearing specimen size φ 6mm * 25mm, mill journey 10.409m, load is 7.84N), the wear resistance of antiwear high-chromium cast iron of the present invention improves more than 30% than Cr15Mo3 rich chromium cast iron, and both production costs are suitable.Antiwear high-chromium cast iron of the present invention has good popularizing application prospect in wear-resisting field.

Claims (2)

1. an antiwear high-chromium cast iron preparation method, is characterized in that, comprises the following steps:
(1) adopt ordinary scrap steel, carburelant, ferrochrome, molybdenum-iron, copper coin, nitrided ferro-chromium, ferrosilicon, ferromanganese, ferro-boron and metallic aluminium melting antiwear high-chromium cast iron in electric furnace, the chemical constitution of antiwear high-chromium cast iron molten iron and massfraction are controlled at: 3.0~3.5%C, 18~25%Cr, 0.3~0.5%Mn, 0.3~0.5%Si, 0.18~0.25%N, 0.5~0.8%Mo, 0.2~0.4%B, 0.08~0.12%Al, 0.5~1.0%Cu, S<0.05%, P<0.05%, surplus is Fe.When rising to 1530~1560 ℃, molten iron temperature comes out of the stove;
(2) when molten iron is come out of the stove, add the master alloy that accounts for molten steel quality mark 1.5~2.5% as nucleating agent, current-following inoculation is processed molten iron, molten iron is after standing and the processing of skimming, when temperature is 1400~1430 ℃, directly pour into casting mold, in molten steel pouring course, with molten iron, add the iron alloy ball that accounts for molten steel quality mark 0.8~1.5% as suspension agent;
(3) foundry goods is quenched and temper after sand removal and grinding process, 950~1000 ℃ of quenching temperatures, and soaking time 2~4h, the type of cooling adopts air-cooled, 230~260 ℃ of tempering temperatures, soaking time 8~12h, air cooling after tempering;
Wherein said iron alloy ball is is 2.5~3.0%C by massfraction, 0.3~0.5%Bi, 0.8~1.0%B, 0.6~1.0%Mn, 1.5~3.0%Si, P<0.05%, S<0.05%, the iron alloy of surplus Fe is broken into the iron alloy ball that granularity is 0.5~1.0mm, master alloy is is 2.0~2.5%C by massfraction, 3~5%Ca, 3~5%Ba, 2.5~5.0%Ti, 12.0~15.0%Si, 0.5~1.0%Mn, P<0.04%, S<0.04%, the master alloy of Fe surplus is crushed to the fritter that granularity is 2~5mm, then iron alloy ball and master alloy are dried 3~4h through 200~250 ℃.
2. a kind of antiwear high-chromium cast iron prepared according to the method for claim 1.
CN201310367339.0A 2013-08-21 2013-08-21 Preparation method of wear-resistant high-chromium cast iron CN103436773B (en)

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CN103789600A (en) * 2014-01-24 2014-05-14 北京工业大学 Hypereutectic high-chromium iron preparation method
CN104087811A (en) * 2013-12-25 2014-10-08 长沙迈科轴承有限公司 Wear-resistant sleeve and preparation and heat treatment process thereof
CN104131217A (en) * 2014-07-24 2014-11-05 宁国市开源电力耐磨材料有限公司 High-chromium alloy cast ball
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CN109261925A (en) * 2018-06-25 2019-01-25 湖北金标通用轧辊有限公司 A kind of high-chromium iron-cast roller and preparation method thereof
CN109295382A (en) * 2018-10-22 2019-02-01 河南科技大学 A kind of high nitrogen antifriction anticorrosion alloy and preparation method thereof
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CN109457168A (en) * 2018-12-24 2019-03-12 宁波颂杰电器有限公司 Household gas range fuel gas conduit alloy and preparation method thereof and fuel gas conduit
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