CN101851726A - Low-alloy pearlite nodular cast iron - Google Patents
Low-alloy pearlite nodular cast iron Download PDFInfo
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- CN101851726A CN101851726A CN 201010175190 CN201010175190A CN101851726A CN 101851726 A CN101851726 A CN 101851726A CN 201010175190 CN201010175190 CN 201010175190 CN 201010175190 A CN201010175190 A CN 201010175190A CN 101851726 A CN101851726 A CN 101851726A
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- nodular cast
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Abstract
The invention discloses low-alloy pearlite nodular cast iron characterized by containing the following chemical elements in weight percentage: 3.6%-3.8% of C, 2.2%-2.4% of Si, 0.5%-0.7% of Mn, 0.24%-0.4% of Cu, 0.04%-0.05% of Cr, 0.11%-0.14% of Mo, 0.03%-0.04% of Re, 0.03%-0.035% of Mg, 0-0.06% of P and 0-0.03% of S. The invention can greatly improve tensile strength and elongation to improve mechanical property and also ensure fatigue resistance and bending resistance. The low-alloy pearlite nodular cast iron obtains an obvious effect when used for producing engine crankshafts, can accord with the operational performance of engines, meets the operational requirements of users for crankshaft products by carrying out a loading 500-hour fatigue-resistant test and also has better wearing resistance and lower manufacturing cost.
Description
Technical field
The present invention relates to a kind of spheroidal graphite cast iron, particularly a kind of low-alloy pearlite nodular cast iron.
Background technology
At present, cast product in the automobile industry (for example bent axle of starting motor-driven vehicle machine part) generally adopts forged steel, make as No. 45 highquality carbon steels or 42CrMo NCC, this class foundry goods has fine antifatigue, resistant to bending performance, but the complete processing of forged steel crankshaft is comparatively complicated, and production efficiency is low, and cost is higher, and long incompatibility Multi-varieties and Small-batch Production of construction cycle, must produce in enormous quantities; Also can use pearlite ductile iron to produce bent axle, this complete processing is simpler, and cost is also lower, and the construction cycle is short, adapts to Multi-varieties and Small-batch Production, and therefore, the technician expects to use pearlite ductile iron to substitute forged steel production bent axle always.But at present common pearlite ductile iron mechanical property is lower, and tensile strength is 700MPa, and unit elongation is 2%.
Summary of the invention
The objective of the invention is to, low-alloy pearlite nodular cast iron is provided.The present invention both can improve tensile strength and unit elongation by a relatively large margin, and mechanical property is improved, and can also guarantee antifatigue and bending resistance.
Technical scheme of the present invention: low-alloy pearlite nodular cast iron is characterized in that: the chemical composition that contains is C, Si, Mn, Cu, Cr, Mo, Re and Mg, or contains P, or also contains S, and each chemical element is as follows by weight percentage:
C 3.6～3.8％ Si 2.2～2.4％
Mn 0.5～0.7％ Cu 0.24～0.4％
Cr 0.04～0.05％ Mo 0.1?1～0.1?4％
Re 0.03～0.04％ Mg 0.03～0.035％
P 0～0.06％ S 0～0.03％。
In the aforesaid low-alloy pearlite nodular cast iron, the chemical composition that contains is C, Si, Mn, Cu, Cr, Mo, Re and Mg, or contains P, or also contain S, each chemical element by weight percentage, more excellent is: C:3.8%, Si:2.3%, Mn:0.6%, P:＜0.05%, S:＜0.03%, Cu:0.4%, Cr:0.05%, Mo:0.14%, Re:0.03～0.04, Mg:0.03%.
In the aforesaid low-alloy pearlite nodular cast iron, the mechanical property of low-alloy pearlite nodular cast iron is tensile strength 〉=850MPa, unit elongation 〉=5%.
In the aforesaid low-alloy pearlite nodular cast iron, low-alloy pearlite nodular cast iron is used to make the bent axle of engine.
Compared with the prior art, the present invention adopts copper, chromium and molybdenum alloy element that pearlite ductile iron is carried out Alloying Treatment and obtains low-alloy pearlite nodular cast iron, mechanical property is improved and raising by a relatively large margin, the tensile strength of the pearlite ductile iron after the alloying 〉=850 MPa, unit elongation 〉=5%.Low-alloy pearlite nodular cast iron of the present invention is used to produce engine crankshaft, obtained obvious effects, can satisfy the engine use properties, the 500 hours antifatigues of luggage machine of going forward side by side are tested, satisfy the service requirements of user, also have wear resisting property and lower manufacturing cost preferably the bent axle product.The present invention both can improve tensile strength and unit elongation by a relatively large margin, and mechanical property is improved, and can also guarantee antifatigue and bending resistance.The mechanical property of the bent axle that the present invention makes is near the mechanical property of forged steel crankshaft, and has the distinctive wear resisting property of spheroidal graphite cast iron.
The present invention is applied to make engine crankshaft.The mechanical property that is drawn described bent axle by test-results is: tensile strength 840～860MPa, unit elongation are 4～6%.Hardness HB250～270 after the normalizing, 2 grades of nodulizing grades, graphite class 6 level.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples, but not as the foundation to the present invention's restriction.
Embodiment: low-alloy pearlite nodular cast iron, characteristics are: the chemical composition that contains is C, Si, Mn, Cu, Cr, Mo, Re and Mg, or contains P, or also contains S, each chemical element is as follows by weight percentage:
C 3.6～3.8％ Si 2.2～2.4％
Mn 0.5～0.7％ Cu 0.24～0.4％
Cr 0.04～0.05％ Mo 0.1?1～0.14％
Re 0.03～0.04％ Mg 0.03～0.035％
P 0～0.06％ S 0～0.03％。
More excellent is: C:3.8%, and Si:2.3%, Mn:0.6%, P:＜0.05%, S:＜0.03%, Cu:0.4%, Cr:0.05%, Mo:0.14%, Re:0.03～0.04, Mg:0.03%.
The mechanical property of described low-alloy pearlite nodular cast iron is tensile strength 〉=850MPa, unit elongation 〉=5%.
The mechanical property of the bent axle that the present invention makes is near the mechanical property of forged steel crankshaft, and has the distinctive wear resisting property of spheroidal graphite cast iron.The mechanical property of described bent axle is: tensile strength 840～860MPa, unit elongation are 4～6%.Hardness HB250～270 after the normalizing, 2 grades of nodulizing grades, graphite class 6 level.
Claims (4)
1. low-alloy pearlite nodular cast iron, it is characterized in that: the chemical composition that contains is C, Si, Mn, Cu, Cr, Mo, Re and Mg, or contains P, or also contains S, each chemical element is as follows by weight percentage:
C 3.6～3.8％ Si 2.2～2.4％
Mn 0.5～0.7％ Cu 0.24～0.4％
Cr 0.04～0.05％ Mo 0.11～0.14％
Re 0.03～0.04％ Mg 0.03～0.035％
P 0～0.06％ S 0～0.03％。
2. low-alloy pearlite nodular cast iron according to claim 1 is characterized in that: the chemical composition that contains is C, Si, Mn, Cu, Cr, Mo, Re and Mg, or contains P, or also contain S, each chemical element by weight percentage, more excellent is: C:3.8%, Si:2.3%, Mn:0.6%, P:＜0.05%, S:＜0.03%, Cu:0.4%, Cr:0.05%, Mo:0.14%, Re:0.03～0.04, Mg:0.03%.
3. low-alloy pearlite nodular cast iron according to claim 1 and 2 is characterized in that: the mechanical property of low-alloy pearlite nodular cast iron is tensile strength 〉=850MPa, unit elongation 〉=5%.
4. low-alloy pearlite nodular cast iron according to claim 3 is characterized in that: low-alloy pearlite nodular cast iron is used to make the bent axle of engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175190 CN101851726A (en) | 2010-05-18 | 2010-05-18 | Low-alloy pearlite nodular cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175190 CN101851726A (en) | 2010-05-18 | 2010-05-18 | Low-alloy pearlite nodular cast iron |
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| CN101851726A true CN101851726A (en) | 2010-10-06 |
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| CN 201010175190 Pending CN101851726A (en) | 2010-05-18 | 2010-05-18 | Low-alloy pearlite nodular cast iron |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540831A (en) * | 2013-11-13 | 2014-01-29 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring method of natural gas power cylinder body |
| CN103602882A (en) * | 2013-11-13 | 2014-02-26 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring molten iron and smelting process of natural gas powered cylinder |
| CN105274423A (en) * | 2014-06-13 | 2016-01-27 | 中国科学院金属研究所 | Carbide-containing austempered ductile iron and preparation method thereof |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59130667A (en) * | 1983-01-17 | 1984-07-27 | Kubota Ltd | Production of composite spherioidal graphite cast iron roll |
| JPS6036757A (en) * | 1983-08-08 | 1985-02-25 | Kubota Ltd | Composite cylinder liner |
| JPS60106946A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Spheroidal graphite cast iron and its production |
| CN1126248A (en) * | 1994-10-25 | 1996-07-10 | 曼·B及W柴油机公开股份有限公司 | Cylinder line of internal combustion engine |
| CN101338769A (en) * | 2008-08-20 | 2009-01-07 | 江苏金湖石油化工机械制造有限公司 | Pendular ring type chlorine gas pump impeller |
-
2010
- 2010-05-18 CN CN 201010175190 patent/CN101851726A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59130667A (en) * | 1983-01-17 | 1984-07-27 | Kubota Ltd | Production of composite spherioidal graphite cast iron roll |
| JPS6036757A (en) * | 1983-08-08 | 1985-02-25 | Kubota Ltd | Composite cylinder liner |
| JPS60106946A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Spheroidal graphite cast iron and its production |
| CN1126248A (en) * | 1994-10-25 | 1996-07-10 | 曼·B及W柴油机公开股份有限公司 | Cylinder line of internal combustion engine |
| CN101338769A (en) * | 2008-08-20 | 2009-01-07 | 江苏金湖石油化工机械制造有限公司 | Pendular ring type chlorine gas pump impeller |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540831A (en) * | 2013-11-13 | 2014-01-29 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring method of natural gas power cylinder body |
| CN103602882A (en) * | 2013-11-13 | 2014-02-26 | 中国石油集团济柴动力总厂成都压缩机厂 | Pouring molten iron and smelting process of natural gas powered cylinder |
| CN103540831B (en) * | 2013-11-13 | 2015-10-28 | 中国石油集团济柴动力总厂成都压缩机厂 | The pouring procedure of natural aerodynamic cylinder |
| CN105274423A (en) * | 2014-06-13 | 2016-01-27 | 中国科学院金属研究所 | Carbide-containing austempered ductile iron and preparation method thereof |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
| CN107354369B (en) * | 2017-06-20 | 2019-04-16 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum and preparation method thereof used under 500 DEG C of high temperature |
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Application publication date: 20101006 |