CN102465230A - Piston material for alloy cast iron - Google Patents
Piston material for alloy cast iron Download PDFInfo
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- CN102465230A CN102465230A CN2010105485941A CN201010548594A CN102465230A CN 102465230 A CN102465230 A CN 102465230A CN 2010105485941 A CN2010105485941 A CN 2010105485941A CN 201010548594 A CN201010548594 A CN 201010548594A CN 102465230 A CN102465230 A CN 102465230A
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Abstract
The invention relates to a piston material for alloy cast iron, which comprises the chemical components by weight percent: 3.15-3.55% of C, 1.9-2.4% of Si, 0.5-0.9% of Mn, less than or equal to 0.15% of S, less than or equal to 0.15% of P, 0.6-1.2% of Ni, less than or equal to 0.5% of Cr, 0.4-0.7% of Mo, 0.2-0.6% of Cu, less than or equal to 0.1% of V, and the balance of impurities and Fe. In the alloy material provided by the invention, the contents of C and Si two elements are increased and the content of Ni element is reduced, so that the scope of the components of alloy elements is more precisely controlled; the casting property, compared with the one before being improved, is promoted; the internal quality of a blank is ensured; the tissue graphite nodules of a piston body and the distribution thereof are increased by one level (according to ISO945); the material cost can be reduced by 3%-5%; the tensile strength of the piston can be increased to above 350Mpa which is increased by above 15% compared to before; the hardness of a quenching layer is increased under the condition of the optimization for the components of the piston material, and the hardness is increased to 55HRC from the original 45HRC and is increased by about 20%; and the service life of the piston is increased to 3 years which is increased by about 30% compared to before.
Description
Technical field
The present invention relates to a kind of alloy material, particularly a kind of cast alloy iron piston material.
Background technology
General two-stroke diesel engine piston material is cast alloy iron; The topmost mechanical property of this type of single-piece piston is a tensile strength; General requirement is 300Mpa (being HT300); For the basic chemical ingredients that guarantees this performance provision following: C:2.75～3.1%, Si:1.5～1.8%, Mn:0.5～1.0%, S: P≤0.15% :≤0.25%, Ni:0.8～1.55%, Cr:0.3～0.8%, Mo:0.2～0.8%, Cu:0.1～0.4%, V :≤0.1%, all the other are impurity and Fe; Under the prerequisite of mechanical property and metallographic structure requirement up to specification; Chemical ingredients allows to do a spot of adjustment, and piston ring groove quenching is handled back hardness and can only be reached about 45HRC.
Because the common failure mode of this type of two stroke diesel engine single-piece piston is that compression broadens because of long term wear gradually, up to scrapping.Therefore be the resistance to abrasion that increases piston, the life-span of improving piston, piston ring groove to be carried out high-frequency quenching handle, regulation hardness is minimum to be 55HRC, so needs further to optimize chemical ingredients, to improve annular groove quenching technology property and to organize abrasion resistance.
Summary of the invention
The object of the present invention is to provide a kind of cast alloy iron piston material that can further improve annular groove quenching technology property and organize abrasion resistance.
The technical scheme that realizes the object of the invention is: a kind of cast alloy iron piston material; It is characterized in that: chemical ingredients per-cent is: C:3.15～3.55%, Si:1.9～2.4%, Mn:0.5～0.9%, S: P≤0.15% :≤0.15%, Ni:0.6～1.2%, Cr :≤0.5%, Mo:0.4～0.7%, Cu:0.2～0.6%, V :≤0.1%, all the other are impurity and Fe.
The chemical ingredients per-cent of above-mentioned cast alloy iron piston material is: C:3.55%, Si:2.4%, Mn:0.9%, S:0.15%, P:0.15%, Ni:1.2%, Cr:0.5%, Mo:0.7%, Cu:0.6%, V:0.1%, all the other are impurity and Fe.
The chemical ingredients per-cent of above-mentioned cast alloy iron piston material is: C:3.25%, Si:2.15%, Mn:0.7%, S:0.07%, P:0.07%, Ni:0.9%, Cr:0.25%, Mo:0.55%, Cu:0.4%, V:0.05%, all the other are impurity and Fe.
The present invention has following characteristics: alloy material of the present invention is to C, and Si two big elements increase to some extent, and the Ni constituent content descends; The scope of the composition of alloying element is more accurately controlled, with improve before compare, the product after the improvement can have following advantage: a) C; The consumption of Si element increases; Improved castability, guaranteed the internal soundness of blank, the spheroidization of graphite of piston machine body tissue and the raising grade (according to ISO945) that distributes thereof; B) consumption of Ni element descends, and material cost can reduce by 3%～5%; C) performance strengthening element Cr, Mo, Cu, the accurate control of various elemental compositions, piston tensile strength can be increased to more than the 350Mpa, improves more than 15% compared with before-improvement; D) optimization and improvement of piston material composition the hardness of quenched case, be increased to 55HRC by original 45HRC, improve nearly 20%; E) owing to the raising of wear resistance, piston life can extend to 3 years, improves about 30% compared with before-improvement.
Embodiment
(embodiment 1)
The chemical ingredients per-cent of cast alloy iron piston material of the present invention is: C:3.55%, Si:2.4%, Mn:0.9%, S:0.15%, P:0.15%, Ni:1.2%, Cr:0.5%, Mo:0.7%, Cu:0.6%, V:0.1%, all the other are impurity and Fe.
(embodiment 2)
The chemical ingredients per-cent of cast alloy iron piston material of the present invention is: C:3.25%, Si:2.15%, Mn:0.7%, S:0.07%, P:0.07%, Ni:0.9%, Cr:0.25%, Mo:0.55%, Cu:0.4%, V:0.05%, all the other are impurity and Fe.
Claims (3)
1. cast alloy iron piston material; It is characterized in that: chemical ingredients per-cent is: C:3.15～3.55%, Si:1.9～2.4%, Mn:0.5～0.9%, S: P≤0.15% :≤0.15%, Ni:0.6～1.2%, Cr :≤0.5%, Mo:0.4～0.7%, Cu:0.2～0.6%, V :≤0.1%, all the other are impurity and Fe.
2. cast alloy iron piston material according to claim 1 is characterized in that: chemical ingredients per-cent is: C:3.55%, Si:2.4%, Mn:0.9%, S:0.15%, P:0.15%, Ni:1.2%, Cr:0.5%, Mo:0.7%, Cu:0.6%, V:0.1%, all the other are impurity and Fe.
3. cast alloy iron piston material according to claim 1 is characterized in that: chemical ingredients per-cent is: C:3.25%, Si:2.15%, Mn:0.7%, S:0.07%, P:0.07%, Ni:0.9%, Cr:0.25%, Mo:0.55%, Cu:0.4%, V:0.05%, all the other are impurity and Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105485941A CN102465230A (en) | 2010-11-17 | 2010-11-17 | Piston material for alloy cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105485941A CN102465230A (en) | 2010-11-17 | 2010-11-17 | Piston material for alloy cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102465230A true CN102465230A (en) | 2012-05-23 |
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ID=46069348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105485941A Pending CN102465230A (en) | 2010-11-17 | 2010-11-17 | Piston material for alloy cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102465230A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
| CN104526274A (en) * | 2014-12-02 | 2015-04-22 | 芜湖福司精密模具有限公司 | Manufacturing method of base of tamping machine |
| CN112204239A (en) * | 2018-05-31 | 2021-01-08 | 日本制铁株式会社 | Steel piston |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190441A (en) * | 1996-02-28 | 1998-08-12 | 株式会社理研 | Cast iron and piston ring |
| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
-
2010
- 2010-11-17 CN CN2010105485941A patent/CN102465230A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190441A (en) * | 1996-02-28 | 1998-08-12 | 株式会社理研 | Cast iron and piston ring |
| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
| CN104526274A (en) * | 2014-12-02 | 2015-04-22 | 芜湖福司精密模具有限公司 | Manufacturing method of base of tamping machine |
| CN112204239A (en) * | 2018-05-31 | 2021-01-08 | 日本制铁株式会社 | Steel piston |
| CN112204239B (en) * | 2018-05-31 | 2022-06-21 | 日本制铁株式会社 | Steel piston |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20120523 |