CN1122113C - High-strength crankshaft of alloy and nodular cast iron and its production process - Google Patents
High-strength crankshaft of alloy and nodular cast iron and its production process Download PDFInfo
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- CN1122113C CN1122113C CN 00123113 CN00123113A CN1122113C CN 1122113 C CN1122113 C CN 1122113C CN 00123113 CN00123113 CN 00123113 CN 00123113 A CN00123113 A CN 00123113A CN 1122113 C CN1122113 C CN 1122113C
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- crankshaft
- cast iron
- nodular cast
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- Expired - Fee Related
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention relates to a crankshaft made of high-strength alloy nodular cast iron and a production method thereof. The crankshaft is mainly melted and smelted by a cupola furnace. Chemical elements of the product mainly comprise Fe, and the product also comprises the following other minor elements and trace elements by weight percentage: 3.6 to 3.8% of C, 1.9 to 2.3% of Si, 0.3 to 0.5% of Mn, less than 0.05% of P, less than 0.035% of S, 0.03 to 0.05% of Mg, 0.02 to 0.035% of Re, 0.4 to 0.6% of Cu and 0.1 to 0.2% of Mo. The present invention has the advantages of simple process, low cost, wear resistance and long service life. The tensile strength of the product reaches 900MPa, and an elongation rate is more than or equal to 4%, which reaches or exceeds the level of similar products produced abroad.
Description
The present invention relates to a kind of high-strength alloy ductile iron crankshaft and production method thereof.
Producing high-strength alloy ductile iron crankshaft majority at present both at home and abroad is to smelt with cupola melting earlier, improves temperature with electric furnace again, casts then.The bent axle of domestic production generally only can be up to state standards, i.e. tensile strength 700-800Mpa, and unit elongation 〉=2% is though the external bent axle of producing can surpass above-mentioned standard, production cost height, complex process.
It is simple to the objective of the invention is to study a kind of technology, and cost is low, and the bent axle tensile strength of production and unit elongation index meet or exceed the high-strength alloy ductile iron crankshaft of external like product level.
The object of the present invention is achieved like this: smelt with cupola melting, and back stove manganese addition, silicon, forehearth adds magnesium-rare earth, antimony, barium, silicon, copper, molybdenum etc., repeatedly breeds, and pouring temperature is 1370-1400 ℃; The chemical element of product is formed based on Fe, and other is followed successively by with micro-shared weight % on a small quantity: C3.6-3.8, Si1.9-2.3, Mn0.3-0.5, P＜0.05, S＜0.035, Mg0.03-0.05, Re0.02-0.035, Cu0.4-0.6, Mo0.1-0.2
Advantage of the present invention is only to smelt with cupola melting, and without electric furnace, so technology is simple, cost is low; The product tensile strength of being produced reaches 900Mpa, unit elongation 〉=4%, and tensile strength is higher by 22% than common homemade bent axle, and unit elongation exceeds one times, has met or exceeded external like product level, and is wear-resistant, long service life.
Embodiment: smelt with cupola melting, back stove manganese addition, silicon, forehearth adds magnesium-rare earth, antimony, barium, silicon, copper, molybdenum, repeatedly breeds, and pouring temperature is 1370-1400 ℃; The chemical element of product is formed based on Fe, and other is followed successively by with micro-shared weight % on a small quantity: C3.6-3.8, Si1.9-2.3, Mn0.3-0.5, P＜0.05, S＜0.035, Mg0.03-0.05, Re0.02-0.035, Cu0.4-0.6, Mo0.1-0.2.
Claims (2)
1, a kind of high-strength alloy ductile iron crankshaft, it is characterized in that: the chemical element of product is formed based on Fe, and other is followed successively by with micro-shared weight % on a small quantity: C3.6-3.8, Si1.9-2.3, Mn0.3-0.5, P＜0.05, S＜0.035, Mg0.03-0.05, Re0.02-0.035, Cu0.4-0.6, Mo0.1-0.2.
2, according to the production method of the described high-strength alloy ductile iron crankshaft of claim 1, smelt with cupola melting, back stove manganese addition, silicon is characterized in that: forehearth adds magnesium-rare earth, antimony, barium, silicon, copper, molybdenum, repeatedly breed, pouring temperature is 1370-1400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123113 CN1122113C (en) | 2000-10-23 | 2000-10-23 | High-strength crankshaft of alloy and nodular cast iron and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123113 CN1122113C (en) | 2000-10-23 | 2000-10-23 | High-strength crankshaft of alloy and nodular cast iron and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1350069A CN1350069A (en) | 2002-05-22 |
| CN1122113C true CN1122113C (en) | 2003-09-24 |
Family
ID=4589590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00123113 Expired - Fee Related CN1122113C (en) | 2000-10-23 | 2000-10-23 | High-strength crankshaft of alloy and nodular cast iron and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1122113C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893033B (en) * | 2009-05-19 | 2012-08-22 | 天润曲轴股份有限公司 | Bulb ferroalloy crankshaft |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225497B (en) * | 2007-01-16 | 2011-01-19 | 天津勤美达工业有限公司 | Ductile iron exhaust manifold, method for preparing the same and device used in preparation |
| CN101982554A (en) * | 2010-08-30 | 2011-03-02 | 浙江太阳股份有限公司 | Copper-antimony alloy spheroidal graphite cast iron material for crank shafts and preparation method thereof |
| CN102401129B (en) * | 2010-09-15 | 2015-06-17 | 上海工程机械厂有限公司 | Cast-in piston body and casting method thereof |
| CN103290302A (en) * | 2012-02-27 | 2013-09-11 | 徐驰 | High-strength alloy nodular cast iron crankshaft |
| CN103602878B (en) * | 2013-11-05 | 2015-09-09 | 北京工业大学 | High tough spheroidal graphite cast iron preparation method |
| CN105039839A (en) * | 2015-08-20 | 2015-11-11 | 合肥市田源精铸有限公司 | Manufacturing method for nodular cast iron used for crankshaft |
| CN111206182B (en) * | 2020-02-22 | 2021-06-11 | 中国第一汽车股份有限公司 | Preparation method of low-alloy nodular cast iron for mold |
-
2000
- 2000-10-23 CN CN 00123113 patent/CN1122113C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893033B (en) * | 2009-05-19 | 2012-08-22 | 天润曲轴股份有限公司 | Bulb ferroalloy crankshaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1350069A (en) | 2002-05-22 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030924 Termination date: 20091123 |