CN102220541B - High chromium cast iron containing SiC powder, preparation method thereof and wear resistant casting - Google Patents
High chromium cast iron containing SiC powder, preparation method thereof and wear resistant casting Download PDFInfo
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- CN102220541B CN102220541B CN201110137775XA CN201110137775A CN102220541B CN 102220541 B CN102220541 B CN 102220541B CN 201110137775X A CN201110137775X A CN 201110137775XA CN 201110137775 A CN201110137775 A CN 201110137775A CN 102220541 B CN102220541 B CN 102220541B
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Abstract
The invention discloses a high chromium cast iron containing SiC powder, a preparation method thereof and a wear resistant casting manufacturing method utilizing the same. A technical scheme is that a high chromium cast iron containing SiC powder is characterized in that the SiC powder is 99.9% SiC and with an average granularity of 20-40 nm, and accounts for 3-6% of a gross weight of the high chromium cast iron. The high chromium cast iron also comprises 3.1-3.9% of C, 18-22% of Cr, 0.5-1.0% of Si, 0.6-1.6% of Mo, 0.6-1.2% of Mn, 0.1-0.4% of Ni, 0.04-0.09% of V, 0.011-0.031% of S, and 0.018-0.030% of P. The beneficial effects are that :1) wear resistance of the casting id substantially raised by the SiC powder; 2) the SiC powder is used to enhance the high chromium cast iron material to form a high impact-resistant, friction-resistant, wearing- resistant high chromium cast iron wear-resistant blast blade. Therefore, the SiC nano powder can not only change growth morphology of high chromium cast iron crystal and growthform of a martensite to substantially enhance material hardness, but also improve material friction and wearing performance at a high temperature to obviously play a role of friction and wearing resistance at a high temperature.
Description
Technical field
The present invention relates to a kind of cast iron materials, especially relate to a kind of SiC of containing powder rich chromium cast iron, this cast iron the preparation method and make the method for wear resistance castings with this kind cast iron materials.
Background technology
In the prior art, rich chromium cast iron has good wear resisting property, therefore, as the shot-blasting machine upper-part that wear resistance is had relatively high expectations, all adopts high chromium cast iron material to be processed into.But there is following disadvantage in this kind rich chromium cast iron in use: bear frictional wear especially under impact frictional wear situation at it, foundry goods is prone to the phenomenon that peel off layer by layer on the surface, thereby causes the foundry goods wear out failure.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, the method that provides a kind of rich chromium cast iron, this cast iron Preparation Method and this cast iron to make abrasion-resistant blade, it is nano level SiC powder that this method adopts granularity, is used for changing M
7C
3The pattern of carbide, thereby the wear resistance of enhancing rich chromium cast iron, the technical scheme of employing is: a kind of rich chromium cast iron of the SiC of containing powder is characterized in that: said SiC powder is 99.9%SiC; Mean particle size is the 20-40 nanometer, and the SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight, and said 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.
Technical scheme of the present invention also has: said preparation method may further comprise the steps:
1) getting purity is 99.9% SiC powder, and said SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) press 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, surplus is the composition of Fe; Carry out charge composition, adopt 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1480-1550 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour said casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, obtain containing the rich chromium cast iron solution of SiC powder;
5) the rich chromium cast iron solution that contains the SiC powder is built after coagulation, obtains containing the rich chromium cast iron of SiC powder.
Technical scheme of the present invention also has: the mean particle size of said SiC powder is the 20-40 nanometer.
Technical scheme of the present invention also has: said wearing piece preparation method comprises the steps:
1) getting purity is 99.9% SiC powder, and said SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) press 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, surplus is the composition of Fe; Carry out charge composition, adopt 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1480-1550 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour said casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, upper berth plant ash, leave standstill 10 minutes after, waiting for pouring;
5) shift to an earlier date in the ready-made investment casting shell pouring into through the finishing metal liquid of sneaking into the SiC powder in the step 4), teeming temperature is 1340-1450 ℃;
6) foundry goods that step 5) is obtained is cooled to 150-200 ℃, broken shell, cool to room temperature;
7) foundry goods that step 6) is obtained is put into the Q326 shot-blasting machine and is carried out impeller blasting behind the excision cast gate;
8) insulation was taken out air cooling to room temperature after 30 minutes the foundry goods of the step 7) process being cleared up is heated to 920-960 ℃ in box heat treatment furnace after;
9) the step 8) medium casting is reheated 220-260 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
Technical scheme of the present invention also has: said wearing piece is the blade on the shot-blasting machine.
Technical scheme of the present invention also has: said blade will can use after the compensation through dynamic balancing measurement.
Technical scheme of the present invention also has: said wearing piece is shot wheel and the orienting cover on the shot-blasting machine.
The beneficial effect of this programme is: 1) the SiC powder can be used as the forming core core that rich chromium cast iron molten metal matrix and carbide solidify; Suppressing crystalline grows up; Obtain evenly tiny equi-axed crystal; Can change the growth morphology of carbide, control the direction of growth of carbide, thereby improve the wear resistance of foundry goods greatly.
2) utilize the SiC powder to strengthen high chromium cast iron material, can form the wear-resisting impeller head blade 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 pattern, change martensitic growthhabit, improve the hardness of material greatly; Can improve the friction and wear behavior under the material at high temperature again, obviously play the effect of opposing high temperature friction and wear.General using SiC powder strengthens the blade of rich chromium cast iron, and its friction resistant polishing machine can reach 5 times of common rich chromium cast iron blade.This shows that the present invention compared with prior art has outstanding substantive distinguishing features and obvious improvement.
Embodiment
For clearly demonstrating the technical characterstic of this programme, through embodiment, the present technique scheme is elaborated below.
The invention discloses a kind of rich chromium cast iron of the SiC of containing powder, wherein, the SiC powder is 99.9%SiC, and mean particle size is the 20-40 nanometer; The SiC powder accounts for the 3-6% of rich chromium cast iron gross weight, and 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 invention also discloses the method that contains the rich chromium cast iron processing wear resistance castings of SiC powder with this kind.
Embodiment one:
1) getting purity is 99.9% SiC powder, and the mean particle size of SiC powder is 40 nanometers, and the SiC powder accounts for 6% of said rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) press 3.9%C, 22%Cr, 1.0%Si, 1.6%Mo, 1.2%Mn, 0.4%Ni, 0.09%V, 0.031%S, 0.030%P, surplus is the composition of Fe, carries out charge composition, adopts 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1250 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, upper berth plant ash, leave standstill 10 minutes after, waiting for pouring;
5) shift to an earlier date in the ready-made investment casting shell pouring into through the finishing metal liquid of sneaking into the SiC powder in the step 4), teeming temperature is 1350 ℃;
6) foundry goods that step 5) is obtained is cooled to 180 ℃, broken shell, cool to room temperature;
7) foundry goods that step 6) is obtained is put into the Q326 shot-blasting machine and is carried out impeller blasting behind the excision cast gate;
8) insulation was taken out air cooling to room temperature after 30 minutes the foundry goods of the step 7) process being cleared up is heated to 960 ℃ in box heat treatment furnace after;
9) the step 8) medium casting is reheated 240 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
The wearing piece that adopts this kind method to make may be made in the blade on the shot-blasting machine, shot wheel and orienting cover, and wherein, blade will pass through and will can be installed on the shot-blasting machine after the compensation and use through dynamic balancing measurement.
Embodiment two:
1) getting purity is 99.9% SiC powder, and the mean particle size of SiC powder is 20 nanometers, and the SiC powder accounts for 3% of rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) press 3.1%C, 18%Cr, 0.5%Si, 0.6%Mo, 0.6%Mn, 0.1%Ni, 0.04%V, 0.011%S, 0.018%P, surplus is the composition of Fe, carries out charge composition, adopts 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1550 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, upper berth plant ash, leave standstill 10 minutes after, waiting for pouring;
5) shift to an earlier date in the ready-made investment casting shell pouring into through the finishing metal liquid of sneaking into the SiC powder in the step 4), teeming temperature is 1350 ℃;
6) foundry goods that step 5) is obtained is cooled to 150 ℃, broken shell, cool to room temperature;
7) foundry goods that step 6) is obtained is put into the Q326 shot-blasting machine and is carried out impeller blasting behind the excision cast gate;
8) insulation was taken out air cooling to room temperature after 30 minutes the foundry goods of the step 7) process being cleared up is heated to 950 ℃ in box heat treatment furnace after;
9) the step 8) medium casting is reheated 240 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
The wearing piece that adopts this kind method to make may be made in the blade on the shot-blasting machine, shot wheel and orienting cover, and wherein, blade will pass through and will can on shot-blasting machine, use after the compensation through dynamic balancing measurement.
Certainly, above-mentioned explanation is not a limitation of the present invention, and the present invention also is not limited only to above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also belong to protection scope of the present invention.
Claims (5)
1. preparation method who contains the rich chromium cast iron of SiC powder, said SiC powder is 99.9%SiC, and mean particle size is the 20-40 nanometer, and the SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight; Said 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 is characterized in that: said preparation method may further comprise the steps:
1) getting purity is 99.9% SiC powder, and said SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) by said 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, surplus is the composition of Fe; Carry out charge composition, adopt 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1480-1550 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour said casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, obtain containing the rich chromium cast iron solution of SiC powder;
5) contain the rich chromium cast iron solution casting after coagulation of SiC powder, obtain containing the rich chromium cast iron of SiC powder.
2. wearing piece that contains the rich chromium cast iron of SiC powder, said SiC powder is 99.9%SiC, and mean particle size is the 20-40 nanometer, and the SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight; Said 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 is characterized in that: the preparation method of said wearing piece comprises the steps:
1) getting purity is 99.9% SiC powder, and said SiC powder accounts for the 3-6% of said rich chromium cast iron gross weight, puts into casting ladle in advance, on use mean diameter to cover as the iron filings of 2-3mm;
2) by said 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, surplus is the composition of Fe; Carry out charge composition, adopt 250 kg medium-frequency induction furnaces to carry out melting, smelting temperature is 1480-1550 ℃;
3) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, obtains finishing metal liquid after the slagging-off of glass collection slag;
4) pour said casting ladle into after finishing metal liquid is left standstill, stirred 2 minutes, make SiC powder and finishing metal liquid thorough mixing, upper berth plant ash, leave standstill 10 minutes after, waiting for pouring;
5) shift to an earlier date in the ready-made investment casting shell pouring into through the finishing metal liquid of sneaking into the SiC powder in the step 4), teeming temperature is 1340-1450 ℃;
6) foundry goods that step 5) is obtained is cooled to 150-200 ℃, broken shell, cool to room temperature;
7) foundry goods that step 6) is obtained is put into the Q326 shot-blasting machine and is carried out impeller blasting behind the excision cast gate;
8) insulation is 30 minutes the foundry goods of the step 7) process being cleared up is heated to 920-960 ℃ in box heat treatment furnace after, takes out air cooling to room temperature;
9) the step 8) medium casting is reheated 220-260 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
3. according to the described wearing piece of claim 2, it is characterized in that: said wearing piece is the blade on the shot-blasting machine.
4. according to the described wearing piece of claim 3, it is characterized in that: said blade will can use after the compensation through dynamic balancing measurement.
5. according to the described wearing piece of claim 2, it is characterized in that: said wearing piece is shot wheel and the orienting cover on the shot-blasting machine.
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| CN103451558B (en) * | 2013-09-16 | 2015-05-13 | 苏州金仓合金新材料有限公司 | Nanoscale silicon carbide cast iron alloy material as well as preparation method as well as application thereof |
| CN103937925B (en) * | 2014-04-30 | 2015-06-24 | 芜湖市和蓄机械股份有限公司 | Preparation method for nano-modified casting |
| CN104002112B (en) * | 2014-05-20 | 2017-01-11 | 滁州迪蒙德模具制造有限公司 | Method for machining die |
| CN104073709A (en) * | 2014-06-19 | 2014-10-01 | 汨罗市源峰耐磨材料有限公司 | High-chromium cast iron and carbide composite wear-resistant ball and preparation process thereof |
| CN105671418A (en) * | 2016-03-29 | 2016-06-15 | 宁国市开源电力耐磨材料有限公司 | Novel preparation method for high-chromium cast iron |
| CN105950934A (en) * | 2016-05-30 | 2016-09-21 | 安徽国成顺风风力发电有限公司 | Alloy material for wind driven generator and preparing method for alloy material |
| CN105908067A (en) * | 2016-05-30 | 2016-08-31 | 安徽普瑞普勒传热技术有限公司 | Oxidation and corrosion resisting material for plate evaporator and preparing method of oxidation and corrosion resisting material |
| CN107557654A (en) * | 2017-08-14 | 2018-01-09 | 宁国市华丰耐磨材料有限公司 | A kind of boron-containing high-chromium cast-iron grinding ball preparation method through nanometer Metamorphism treatment |
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| US487093A (en) * | 1892-11-29 | Electric-current indicator |
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| JP3894373B2 (en) * | 1995-10-05 | 2007-03-22 | 日立金属株式会社 | High hardness and corrosion resistant steel for blades |
| CN100560743C (en) * | 2006-12-07 | 2009-11-18 | 首钢总公司 | The method of producing ultra-low phosphoretic steel by molten steel dephosphorising outside furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US487093A (en) * | 1892-11-29 | Electric-current indicator |
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| Title |
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| JP特开平9-104954A 1997.04.22 |
| 李建卫等.改性纳米SiC粉体强化灰铸铁耐磨性能的研究.《铸造》.2007,第56卷(第1期),第68页. * |
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Owner name: SHANDONG KAITAI ABRATOR MACHINERY CO., LTD. Free format text: FORMER NAME: SHANDONG KAITAI SHOT-BLASTING MACHINERY CO., LTD. |
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Address after: 256217 Zouping City, Shandong province Qingyang town resident Patentee after: Safe ball blast machinery incorporated company is opened in Shandong Address before: 256217 Zouping City, Shandong province Qingyang town resident Patentee before: Shandong Kaitai Shot-Blasting Machinery Co., Ltd. |