CN104862611A - Cast material for casting wear-resisting centrifugal cylinder and casting technology thereof - Google Patents
Cast material for casting wear-resisting centrifugal cylinder and casting technology thereof Download PDFInfo
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- CN104862611A CN104862611A CN201510237777.4A CN201510237777A CN104862611A CN 104862611 A CN104862611 A CN 104862611A CN 201510237777 A CN201510237777 A CN 201510237777A CN 104862611 A CN104862611 A CN 104862611A
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Abstract
The invention discloses a cast material for casting a wear-resisting centrifugal cylinder and a casting technology thereof. The technology comprises the steps that casting forming and casting sand drying are carried out; casting ingredients are selected; the casting ingredients are loaded into an intermediate-frequency vacuum induction furnace for smelting to form original iron liquid; pretreating agents with Cr as the main material and Ni as the auxiliary material are added, so that casting molten iron meets the requirements of cast material chemical components; first-time inoculation is carried out, and then second-time inoculation is carried out; casting is carried out, and casting temperature is 1350-1450 DEG C; after temperature preservation and cooling, a cast is taken out, then a casting head is removed, and quenching and annealing treatment is carried out; finally, the cast is subjected to shot blasting clearing and machining, a centrifugal cylinder finished product is obtained, and warehouse-in inspection is carried out. The manufactured centrifugal cylinder meets the technical requirement in plasticity and intensity; the wear-resisting performance of the centrifugal cylinder is greatly improved; accordingly, the comprehensive mechanical performance of the centrifugal cylinder is improved, and the service life of the centrifugal cylinder is prolonged.
Description
Technical field
The present invention relates to metal casting technique field, relate in particular to a kind of cast material for casting wear-resistant centrifugal cylinder and casting technique thereof.
Background technology
Centrifugal cylinder is a kind of circular thin-wall porous member, because environment for use is severe, it proposes more special requirement to the material for casting centrifugal cylinder, not only require that it has higher plasticity and higher intensity, and require that it has higher wear resistance, but the comprehensive mechanical performance of the centrifugal cylinder cast with conventional cast material is at present poor, plasticity and intensity poor, wear resisting property is not enough, at present, the work-ing life of the centrifugal cylinder using conventional cast material to cast is 1 ~ 2 day, its collapse mode mainly weares and teares, show that the centrifugal cylinder wear resisting property that common cast material is cast is not enough.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, kind of a kind of cast material for casting wear-resistant centrifugal cylinder and casting technique thereof are provided.Not only in plasticity and intensity, reach technical requirements, and substantially increase the wear resisting property of centrifugal cylinder, thus improve the comprehensive mechanical performance of centrifugal cylinder, extend the work-ing life of centrifugal cylinder.
For achieving the above object, present invention employs following technical scheme:
A kind of cast material for casting wear-resistant centrifugal cylinder, be main raw material with iron, and be equipped with carbon, silicon, manganese, sulphur, phosphorus, chromium, molybdenum, nickel, copper is auxiliary material, after preparation, melting and casting forms, it is characterized in that, in liquation, each chemical component weight percentage ratio is specially: C 0.32 ~ 0.4%; Si 0.6 ~ 0.8%, Mn 1.7 ~ 2.0%, S<0.010%, P<0.02%, Cr 1.4 ~ 1.7%, Ni 0.9 ~ 1.1%, Mo 0.6 ~ 0.8%, Cu 2.0 ~ 3.0%, surplus is Fe.
As the improvement to technique scheme, in the above-mentioned cast material for casting wear-resistant centrifugal cylinder, each chemical component weight percentage ratio is specially C 0.36%; Si 0.7%, Mn 1.8%, S<0.010%, P<0.02%, Cr 1.5%, Ni 1.0%, Mo 0.7%, Cu 2.5%, surplus is Fe.
The present invention provides the casting technique using cast material casting wear-resistant centrifugal cylinder of the present invention in the lump, and the step of this casting technique is:
(1), with molding sand and core sand for molding material makes casting mold, before making casting mold, first the molding sand in molding material is placed in baker and dries;
(2), select casting batching, comprise foundry return, iron filings and steel scrap, and casting batching is carried out flame baking, described steel scrap is carbon steel or soft steel, and described iron filings are cast iron waste material;
(3), foundry return, iron filings and the steel scrap in the casting batching after flame baking being loaded melting in intermediate frequency vacuum induction furnace is successively original iron melt, successively add in electric furnace according to the principle of lower tight upper pine when loading casting batching, smelting temperature is 1450 DEG C, and copper is added in original iron melt, make the chemical component weight percentage ratio of copper be 2.0 ~ 3.0%; Progressively increasing circuit power in fusion process, and often carry out smashing material operation;
(4) original iron melt, in step (3) come out of the stove in forward direction electric furnace add based on Cr, Ni is auxiliary pretreating agent, make it to meet molten casting iron chemical component weight percentage ratio to be: C 0.32 ~ 0.4%; Si 0.6 ~ 0.8%, Mn 1.7 ~ 2.0%, S<0.010%, P<0.02%, Cr 1.4 ~ 1.7%, Ni 0.9 ~ 1.1%, Mo 0.6 ~ 0.8%; Cu 2.0 ~ 3.0%;
(5) add nucleating agent in the original iron melt after, skimming in step (4) and carry out first time inoculation, subsequently original iron melt is poured in sprue cup, and in sprue cup, add sulphur oxygen nucleating agent carry out second time inoculation, after twice inoculation terminates again on original iron melt the slag making of spreading perlite to purify original iron melt and to skim at once;
(6) pour into a mould in the casting mold, by the original iron melt after skimming in step (5) made in step (1) after standing for some time in sprue cup, teeming temperature is 1350 ~ 1450 DEG C;
(7), foundry goods is taken out after insulation cooling, then dead head is removed, obtained foundry goods is carried out successively 650 DEG C of quenchings, be incubated 3 hours, temperature is raised to 1020 DEG C of insulations 2 hours, temperature drops to 980 DEG C of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 DEG C of insulations, and its temperature rise rate is all 50 DEG C/h;
(8), by the foundry goods after process in step (7) centrifugal cylinder finished product is obtained through shot blasting and mechanical workout, and inspection warehouse-in.
Compared with prior art, the invention has the beneficial effects as follows:
Choose the cast material for casting wear-resistant centrifugal cylinder of the present invention and coordinate casting technique provided by the present invention, the work-ing life of obtained centrifugal cylinder brought up to 4 ~ 5 days from original 1 ~ 2 day, centrifugal cylinder not only reaches technical requirements in plasticity and intensity, and substantially increase the wear resisting property of centrifugal cylinder, thus improve the comprehensive mechanical performance of centrifugal cylinder, extend the work-ing life of centrifugal cylinder.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with specific embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and be not used in restriction invention.
Embodiment one
(1), with molding sand and core sand for molding material makes casting mold, before making casting mold, first the molding sand in molding material is placed in baker and dries;
(2), select casting batching, comprise foundry return, iron filings and steel scrap, and casting batching is carried out flame baking, described steel scrap is carbon steel or soft steel, and described iron filings are cast iron waste material;
(3), foundry return, iron filings and the steel scrap in the casting batching after flame baking being loaded melting in intermediate frequency vacuum induction furnace is successively original iron melt, successively add in electric furnace according to the principle of lower tight upper pine when loading casting batching, smelting temperature is 1450 DEG C, and copper is added in original iron melt, make the chemical component weight percentage ratio of copper be 2.0%; Progressively increasing circuit power in fusion process, and often carry out smashing material operation;
(4) original iron melt, in step (3) come out of the stove in forward direction electric furnace add based on Cr, Ni is auxiliary pretreating agent, make it to meet molten casting iron chemical component weight percentage ratio to be: C 0.32%; Si 0.6%, Mn 1.7 ~ 2.0%, S<0.010%, P<0.02%, Cr 1.4%, Ni 0.9%, Mo 0.6%; Cu 2.0%;
(5) add nucleating agent in the original iron melt after, skimming in step (4) and carry out first time inoculation, subsequently original iron melt is poured in sprue cup, and in sprue cup, add sulphur oxygen nucleating agent carry out second time inoculation, after twice inoculation terminates again on original iron melt the slag making of spreading perlite to purify original iron melt and to skim at once;
(6) pour into a mould in the casting mold, by the original iron melt after skimming in step (5) made in step (1) after standing for some time in sprue cup, teeming temperature is 1350 DEG C;
(7), foundry goods is taken out after insulation cooling, then dead head is removed, obtained foundry goods is carried out successively 650 DEG C of quenchings, be incubated 3 hours, temperature is raised to 1020 DEG C of insulations 2 hours, temperature drops to 980 DEG C of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 DEG C of insulations, and its temperature rise rate is all 50 DEG C/h;
(8), by the foundry goods after process in step (7) centrifugal cylinder finished product is obtained through shot blasting and mechanical workout, and inspection warehouse-in.
Embodiment two:
(1), with molding sand and core sand for molding material makes casting mold, before making casting mold, first the molding sand in molding material is placed in baker and dries;
(2), select casting batching, comprise foundry return, iron filings and steel scrap, and casting batching is carried out flame baking, described steel scrap is carbon steel or soft steel, and described iron filings are cast iron waste material;
(3), foundry return, iron filings and the steel scrap in the casting batching after flame baking being loaded melting in intermediate frequency vacuum induction furnace is successively original iron melt, successively add in electric furnace according to the principle of lower tight upper pine when loading casting batching, smelting temperature is 1450 DEG C, and copper is added in original iron melt, make the chemical component weight percentage ratio of copper be 3.0%; Progressively increasing circuit power in fusion process, and often carry out smashing material operation;
(4) original iron melt, in step (3) come out of the stove in forward direction electric furnace add based on Cr, Ni is auxiliary pretreating agent, make it to meet molten casting iron chemical component weight percentage ratio to be: C 0.4%; Si 0.8%, Mn 2.0%, S<0.010%, P<0.02%, Cr 1.7%, Ni 1.1%, Mo 0.8%; Cu 3.0%;
(5) add nucleating agent in the original iron melt after, skimming in step (4) and carry out first time inoculation, subsequently original iron melt is poured in sprue cup, and in sprue cup, add sulphur oxygen nucleating agent carry out second time inoculation, after twice inoculation terminates again on original iron melt the slag making of spreading perlite to purify original iron melt and to skim at once;
(6) pour into a mould in the casting mold, by the original iron melt after skimming in step (5) made in step (1) after standing for some time in sprue cup, teeming temperature is 1450 DEG C;
(7), foundry goods is taken out after insulation cooling, then dead head is removed, obtained foundry goods is carried out successively 650 DEG C of quenchings, be incubated 3 hours, temperature is raised to 1020 DEG C of insulations 2 hours, temperature drops to 980 DEG C of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 DEG C of insulations, and its temperature rise rate is all 50 DEG C/h;
(8), by the foundry goods after process in step (7) centrifugal cylinder finished product is obtained through shot blasting and mechanical workout, and inspection warehouse-in.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the cast material for casting wear-resistant centrifugal cylinder, be main raw material with iron, and be equipped with carbon, silicon, manganese, sulphur, phosphorus, chromium, molybdenum, nickel, copper is auxiliary material, after preparation, melting and casting forms, it is characterized in that, in liquation, each chemical component weight percentage ratio is specially: C 0.32 ~ 0.4%; Si 0.6 ~ 0.8%, Mn 1.7 ~ 2.0%, S<0.010%, P<0.02%, Cr 1.4 ~ 1.7%, Ni 0.9 ~ 1.1%, Mo 0.6 ~ 0.8%, Cu 2.0 ~ 3.0%, surplus is Fe.
2. the cast material for casting wear-resistant centrifugal cylinder according to claim 1, is characterized in that: in the above-mentioned cast material for casting wear-resistant centrifugal cylinder, and each chemical component weight percentage ratio is specially C 0.36%; Si 0.7%, Mn 1.8%, S<0.010%, P<0.02%, Cr 1.5%, Ni 1.0%, Mo 0.7%, Cu 2.5%, surplus is Fe.
3. use a casting technique for the cast material casting wear-resistant centrifugal cylinder for casting wear-resistant centrifugal cylinder described in described claim 1 or 2, it is characterized in that: the step of this casting technique is:
(1), with molding sand and core sand for molding material makes casting mold, before making casting mold, first the molding sand in molding material is placed in baker and dries;
(2), select casting batching, comprise foundry return, iron filings and steel scrap, and casting batching is carried out flame baking, described steel scrap is carbon steel or soft steel, and described iron filings are cast iron waste material;
(3), foundry return, iron filings and the steel scrap in the casting batching after flame baking being loaded melting in intermediate frequency vacuum induction furnace is successively original iron melt, successively add in electric furnace according to the principle of lower tight upper pine when loading casting batching, smelting temperature is 1450 DEG C, and copper is added in original iron melt, make the chemical component weight percentage ratio of copper be 2.0 ~ 3.0%; Progressively increasing circuit power in fusion process, and often carry out smashing material operation;
(4) original iron melt, in step (3) come out of the stove in forward direction electric furnace add based on Cr, Ni is auxiliary pretreating agent, make it to meet molten casting iron chemical component weight percentage ratio to be: C 0.32 ~ 0.4%; Si 0.6 ~ 0.8%, Mn 1.7 ~ 2.0%, S<0.010%, P<0.02%, Cr 1.4 ~ 1.7%, Ni 0.9 ~ 1.1%, Mo 0.6 ~ 0.8%; Cu 2.0 ~ 3.0%;
(5) add nucleating agent in the original iron melt after, skimming in step (4) and carry out first time inoculation, subsequently original iron melt is poured in sprue cup, and in sprue cup, add sulphur oxygen nucleating agent carry out second time inoculation, after twice inoculation terminates again on original iron melt the slag making of spreading perlite to purify original iron melt and to skim at once;
(6) pour into a mould in the casting mold, by the original iron melt after skimming in step (5) made in step (1) after standing for some time in sprue cup, teeming temperature is 1350 ~ 1450 DEG C;
(7), foundry goods is taken out after insulation cooling, then dead head is removed, obtained foundry goods is carried out successively 650 DEG C of quenchings, be incubated 3 hours, temperature is raised to 1020 DEG C of insulations 2 hours, temperature drops to 980 DEG C of insulations, and after 8 hours, air cooling is to room temperature, and then after 10 hours, air cooling is to room temperature in tempered 480 DEG C of insulations, and its temperature rise rate is all 50 DEG C/h;
(8), by the foundry goods after process in step (7) centrifugal cylinder finished product is obtained through shot blasting and mechanical workout, and inspection warehouse-in.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803301A (en) * | 2016-03-25 | 2016-07-27 | 福建省神悦铸造股份有限公司 | Shell mold casting process |
| CN106734895A (en) * | 2016-12-21 | 2017-05-31 | 重庆市合川区银窝铸造厂 | Casting technique for casting motorcycle wearing piece |
| CN107716854A (en) * | 2017-09-01 | 2018-02-23 | 东风精密铸造安徽有限公司 | A kind of metal craft dry sand mold casting operation technique |
| CN111215577A (en) * | 2019-11-26 | 2020-06-02 | 山西晋武能源有限公司 | Production process of stirring pot before molding of cast briquette |
| CN112536420A (en) * | 2020-11-19 | 2021-03-23 | 湖北恩腾机械有限公司 | Preparation process of eccentric casting wear-resistant bent pipe |
| CN115255281A (en) * | 2022-07-19 | 2022-11-01 | 石家庄市宏森熔炼铸造有限公司 | Casting process of high-precision casting and casting |
| CN116511423A (en) * | 2023-04-26 | 2023-08-01 | 盐城东皇铸造有限公司 | Casting process for casting wear-resistant centrifugal cylinder |
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| CN1175980A (en) * | 1995-01-20 | 1998-03-11 | 英国钢铁公司 | Improvements in and relating to cartide-free bainitic steels and method of producing such steels |
| CN1361306A (en) * | 2000-12-29 | 2002-07-31 | 天津钢管公司 | Petroleum casing resisting stress corrosion of H2S and its production process |
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| JPS59129724A (en) * | 1983-01-14 | 1984-07-26 | Nippon Steel Corp | Production of thick walled ultra high tension steel |
| CN1175980A (en) * | 1995-01-20 | 1998-03-11 | 英国钢铁公司 | Improvements in and relating to cartide-free bainitic steels and method of producing such steels |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803301A (en) * | 2016-03-25 | 2016-07-27 | 福建省神悦铸造股份有限公司 | Shell mold casting process |
| CN106734895A (en) * | 2016-12-21 | 2017-05-31 | 重庆市合川区银窝铸造厂 | Casting technique for casting motorcycle wearing piece |
| CN107716854A (en) * | 2017-09-01 | 2018-02-23 | 东风精密铸造安徽有限公司 | A kind of metal craft dry sand mold casting operation technique |
| CN111215577A (en) * | 2019-11-26 | 2020-06-02 | 山西晋武能源有限公司 | Production process of stirring pot before molding of cast briquette |
| CN112536420A (en) * | 2020-11-19 | 2021-03-23 | 湖北恩腾机械有限公司 | Preparation process of eccentric casting wear-resistant bent pipe |
| CN115255281A (en) * | 2022-07-19 | 2022-11-01 | 石家庄市宏森熔炼铸造有限公司 | Casting process of high-precision casting and casting |
| CN115255281B (en) * | 2022-07-19 | 2024-04-09 | 石家庄市宏森熔炼铸造有限公司 | Casting process of high-precision casting and casting |
| CN116511423A (en) * | 2023-04-26 | 2023-08-01 | 盐城东皇铸造有限公司 | Casting process for casting wear-resistant centrifugal cylinder |
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