CN1102179C - Alloyed cast iron for cam axle - Google Patents
Alloyed cast iron for cam axle Download PDFInfo
- Publication number
- CN1102179C CN1102179C CN 99117690 CN99117690A CN1102179C CN 1102179 C CN1102179 C CN 1102179C CN 99117690 CN99117690 CN 99117690 CN 99117690 A CN99117690 A CN 99117690A CN 1102179 C CN1102179 C CN 1102179C
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- camshaft
- cast alloy
- alloy iron
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- cam
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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The present invention discloses alloy cast iron for a camshaft. The chemical components comprise 3.3 to 3.75% of C, 1.9 to 2.4% of Si, 0.6 to 0.9% of Mn, 1.0 to 1.4% of Cr, 1.0 to 1.5% of Mo, 0.2 to 0.4% of Cu, at most 0.04% of P, at most 0.1% of S, and Fe and inevitable impurities as the rest. The surface hardening treatment can be carried out for a camshaft made of the alloy cast iron on the basis of cold quenching, and the chill hardness can reach HRC 60 to 62. Thereby, the wear resistance performance of a cam is raised further, and the service life is extended.
Description
The present invention relates to be used to make the cast alloy iron of camshaft, especially the cast alloy iron used of internal combustion (IC) engine camshaft.
Camshaft is the strength member that opens and closes the cylinder valve in the oil engine, and the wear resistance at its cam position directly influences the performance of oil engine.During work, the cam working face of camshaft closely contacts with the valve tappet end face, forms a pair of friction pair.When the camshaft high speed rotating, the working face of cam, especially to bear repeatedly surge pressure and frictional force between the working face in the Tao Jian district of cam and the tappet end face, under the effect of this high speed repeated load, fatigue wear can take place in the working face of cam, when abrasion loss surpassed a certain value, the performance of oil engine significantly descended.Because wear rate and wear surface hardness are inversely proportional to, therefore the material that camshaft is used not only higher intensity, toughness will be arranged, and cam working face also should have the passive hardness of the repeated stock of being subjected to.According to the structure of camshaft, factory generally adopts cast alloy iron inexpensive, good rigidity to make camshaft in the recent period both at home and abroad.Publish China Machine Press in September, 1991 " mechanical processing technique handbook the 1st volume 2-92 page table 2.2-61 has introduced a kind of chemical ingredients that is used to make the chilled cast iron alloy of camshaft, the spoken parts in traditional operas hardness of this chilled cast iron alloy reaches HRC45, heart portion tensile strength sigma
bBe 260MPa; But also introduced the Chemical Composition and the mechanical property of the other four kinds of hardenable alloys cast irons that are used for camshaft in this handbook 2-78 page table 2.2-29, spoken parts in traditional operas hardness is up to HB321, the anti-intensity σ that leans on of heart portion
b=247MPa.
Modern oil engine for energy-saving material-saving, improves performance, significantly improving power simultaneously, take the measure of reduced volume, not only the volume of camshaft is reduced, improved the specific mass of engine, and alternating impulse load and frequency that cam working face bears have improved also.This has mechanical property preferably, higher spoken parts in traditional operas hardness with regard to the material that requires to make camshaft.Yet five kinds of cast alloy irons that above-mentioned handbook is introduced can't reach this type of high requirement.
For this reason, but produce spoken parts in traditional operas after the objective of the invention is to seek a kind of both cold shocks, the cast alloy iron that can quench to cold shock portion again, and make the ash mouth of this cast alloy iron have better comprehensive performance.
The chilled cast iron alloy that the present invention's employing can be hardened solves above-mentioned purpose, and the chemical component weight per-cent of its constituent is:
C 3.3～3.75 Si 1.9～2.4 Mn 0.6～0.9
Cr 1.0～1.4 Mo 1.0～1.5 Cu 0.2～0.4
All the other are Fe and unavoidable impurities for maximum 0.04 S of P maximum 0.1.
Optimum chemical composition weight percent of the present invention is:
C 3.4～3.6 Si 2.1～2.3 Mn 0.8～0.9
Cr?1.2～1.4 Mo 1.2～1.5 Cu 0.2～0.4
All the other are Fe and unavoidable impurities for maximum 0.04 S of P maximum 0.1.
Owing to contain Cr, Mo, Cu in the cast alloy iron of the present invention, and strengthened the proportioning of Cr, Mo, reduced the content of P and S, not only help preventing or reduce deleterious MoP in the cast alloy iron
4Generation, the physical strength of cast alloy iron is improved, but also can improve the hardenability energy of this cast alloy iron, thereby after to the cold shock of nose district, also can carry out quench treatment to its surface, fine pearlite+ledeburite+needle-like the cementite of the standard weave that makes cam cold shock district after by cold shock is converted into the lower bainite+sorbite+alloy carbide after the hard surfacing, the hardness in cam cold shock district can reach HRC60～62, chill depth surpasses 6mm, the wear resisting property and the fatigue strength of cam working face are further enhanced, both prolonged the work-ing life of camshaft, that can satisfy the high performance internal combustion engine camshaft again uses the material problem; In addition, this cast alloy iron adopts inexpensive element material, and cost performance is further improved.
Below in conjunction with embodiment, further describe the present invention.
The cast alloy iron that camshaft of the present invention is used is mainly formed through mixing, melting by the inexpensive element materials such as Fe, C, Si, Mn, Cr, Mo, Cu that contain, and the weight percent of its chemical ingredients is:
C 3.3～3.75 Si 1.9～2.4 Mn 0.6～0.9
Cr 1.0～1.4 Mo 1.0～1.5 Cu 0.2～0.4
All the other are Fe and unavoidable impurities for maximum 0.04 S of P maximum 0.1.
The cast alloy iron that constitutes with above-mentioned chemical ingredients with the cold shock district fast cold-forming of chill to cam, carries out hard surfacing again to the cold shock district of cam then and handles in casting camshaft process.In the cold shock district of cam, the matrix of material is lower bainite+sorbite+alloy carbide, and surface hardness can be brought up to HRC60～62; Heart portion and be ferrite+be not more than 15% the cementite, the tensile strength sigma of material of thin flaky perlite+be not more than 5% away from the matrix at position, cam cold shock district
b〉=260MPa; Matrix in zone of transition is fiber crops mouthful tissues, and the carburizing scale of construction is more, and hardness is higher.
Embodiment 1: the chemical component weight per-cent of the cast alloy iron that camshaft is used is:
C 3.6～3.7 Si 2.3～2.4 Mn 0.7～0.8
Cr?1.1～1.2 Mo 1.4～1.5 Cu 0.2～0.3
All the other are Fe and unavoidable impurities for P 0.04 S 0.05.The spoken parts in traditional operas hardness of this cast alloy iron can reach HRC60.Embodiment 2: the weight percent of the chemical ingredients of the cast alloy iron that camshaft is used is: all the other are Fe and unavoidable impurities for maximum 0.04 S of C 3.3～3.4 Si 1.9～2.0 Mn 0.6～0.7Cr 1.3～1.4 Mo 1.1～1.2 Cu 0.3～0.4P maximum 0.1.The spoken parts in traditional operas hardness of this cast alloy iron can reach HRC60.Embodiment 3: the weight percent of the chemical ingredients of the cast alloy iron that camshaft is used is: all the other are Fe and unavoidable impurities for maximum 0.04 S of C 3.4～3.6 Si 2.1～2.3 Mn 0.8～0.9Cr 1.2～1.4 Mo 1.2～1.4 Cu 0.2～0.4P maximum 0.1.The spoken parts in traditional operas hardness of this cast alloy iron can reach HRC62.Embodiment 4: the weight percent of the chemical ingredients of the cast alloy iron that camshaft is used is: all the other are Fe and unavoidable impurities for maximum 0.04 S of C 3.6～3.75 Si 1.9～2.1 Mn 0.6～0.8Cr 1.2～1.3 Mo 1.4～1.5 Cu 0.2～0.3P maximum 0.1.The spoken parts in traditional operas hardness of this a kind of cast alloy iron reaches HRC62.
Claims (2)
1, the cast alloy iron used of a kind of camshaft is characterized in that the chemical component weight per-cent of this cast alloy iron is:
C 3.3～3.75 Si 1.9～2.4 Mn?0.6～0.9
Cr?1.0～1.4 Mo 1.0～1.5 Cu?0.2～0.4
The maximum 0.04 S maximum 0.1 of P
All the other are Fe and unavoidable impurities.
2, the cast alloy iron used of camshaft according to claim 1 is characterized in that the optimum chemical composition weight percent of this cast alloy iron is:
C 3.4～3.6 Si 2.1～2.3 Mn?0.8～0.9
Cr?1.2～1.4 Mo 1.2～1.5 Cu?0.2～0.4
The maximum 0.04 S maximum 0.1 of P
All the other are Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117690 CN1102179C (en) | 1999-08-17 | 1999-08-17 | Alloyed cast iron for cam axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99117690 CN1102179C (en) | 1999-08-17 | 1999-08-17 | Alloyed cast iron for cam axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1243886A CN1243886A (en) | 2000-02-09 |
| CN1102179C true CN1102179C (en) | 2003-02-26 |
Family
ID=5280220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99117690 Expired - Fee Related CN1102179C (en) | 1999-08-17 | 1999-08-17 | Alloyed cast iron for cam axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1102179C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899610B (en) * | 2010-08-31 | 2012-03-28 | 卫辉熔金高温材料有限责任公司 | Wet pan gear and manufacturing 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 |
| CN105525193A (en) * | 2015-12-18 | 2016-04-27 | 张淑芬 | Novel cast iron alloy material for crankshaft |
-
1999
- 1999-08-17 CN CN 99117690 patent/CN1102179C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1243886A (en) | 2000-02-09 |
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