CN101644302A - Release shifting fork for automobile clutch - Google Patents
Release shifting fork for automobile clutch Download PDFInfo
- Publication number
- CN101644302A CN101644302A CN200910305170A CN200910305170A CN101644302A CN 101644302 A CN101644302 A CN 101644302A CN 200910305170 A CN200910305170 A CN 200910305170A CN 200910305170 A CN200910305170 A CN 200910305170A CN 101644302 A CN101644302 A CN 101644302A
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- China
- Prior art keywords
- shifting fork
- automobile clutch
- arc convex
- release
- release shifting
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Abstract
The invention discloses a release shifting fork for an automobile clutch. The release shifting fork comprises a shifting fork body (1), wherein a cambered bulge (3) is arranged on the shifting fork body (1). The invention is characterized in that the outer surface of the cambered bulge (3) is provided with an antiwear layer (2). Raw materials of the antiwear layer thereof, which comprise magnesium, silicon, carbon, titanium and rare earth, are processed by alteration treatment by alterant, thereby guaranteeing the wear resistance of the cambered bulge; and the surface hardness and the wear resistance thereof are obviously higher than matrix steel. The invention can be widely applied to gear-boxes of heavy load vehicles and tractors.
Description
Technical field
The present invention relates to a kind of release shifting fork for automobile clutch.
Background technique
Parts depreciation is unlike fracture and the same easy catastrophic harm of workpiece that causes of corrosion, but the economic loss that causes is quite surprising, according to statistics, U.S.'s annual loss quench goes out 10,000,000,000 dollars, and the wear resistance of a large amount of fundamental parts of China generally is starkly lower than the level of external advanced product.Abrasive wear is topmost a kind of wearing and tearing in all types of wearing and tearing, accounts for 50% of all wearing and tearing, and China reaches more than 200 tons because of consuming steel abrasive wear year, and is expensive above 5,000,000,000 yuan.Thereby the high-abrasive material under the research and development abrasive wear condition is of great immediate significance.
And for heavy load truck, its clutch shifter is the critical component of automobile, release shifting fork for automobile clutch was scrapped except wearing and tearing take place in the spreadable life, also rupture, adopt the clutch shifter of methods such as ESEM, Energy Disperse Spectroscopy EDS and chemical analysis to analyze, the result shows that it mainly is abrasive wear that clutch release fork is scrapped, fatigue fracture during fracture, the existence of the inclined to one side polymerization slag inclusion of defective, impurity element during its casting is the reason that forms the infant cracking source.And before the present invention, adopt No. 45 cast steels, and because size is narrow and long partially, during casting, the yielding bending of part, casting defect is many, thereby its wear-resisting property is relatively poor.
Summary of the invention
In view of the deficiency that background technique exists, the technical problem to be solved in the present invention provides the strong release shifting fork for automobile clutch of a kind of wear-resisting property.
For this reason, the present invention takes following technological scheme to realize: a kind of release shifting fork for automobile clutch, have the shift fork body, and on the shift fork body, be provided with arc convex, it is characterized in that being provided with wearing layer at the outer surface of described arc convex.
Described wearing layer is to be raw material with Mn, Si, C, Ti, Re, does rotten the processing by leavening agent at the outer surface of arc convex and forms, and wherein, described Mn, Si, C, Ti, rare earth weight percentage are Mn; 1.2-1.8%, Si; 0.4-0.6%, C; 0.4-0.52%, Ti; 0.02-0.04%, all the other are cast steel.
Described leavening agent is a kind of composite modifier that contains rare earth, titanium, silicon, iron and magnesium.
Among the present invention, the setting of its wearing layer, particularly adopt Mn, Si, C, Ti, rare earth is a raw material, by leavening agent after the first-class processing of arc convex of shift fork, the form and the distribution of its interior tissue of arc convex and carbide have obviously been improved, its arc convex surface obtains the TiC particle and strengthens composite bed, carbide mainly relatively is evenly distributed on the arc convex with granular, obviously improved wear resistance, test result shows, its hardness of wearing layer on the arc convex and wear resistance are used for automobile apparently higher than steel base with this clutch release fork, have obvious social and economic benefits.
Description of drawings
Further describe relevant details of the present invention below more in conjunction with the accompanying drawings.
Fig. 1 is the structural drawing of release shifting fork for automobile clutch of the present invention.
Embodiment
As shown in the figure, this release shifting fork for automobile clutch has shift fork body 1, is provided with arc convex 3 on shift fork body 1, is provided with wearing layer 2 at the outer surface of described arc convex 3.Described wearing layer 2 is to be raw material with Mn, Si, C, Ti, rare earth, doing rotten the processing by leavening agent at the outer surface of arc convex forms, wherein, described Mn, Si, C, Ti, rare earth part by weight are that Mn accounts for 1.2-1.8%, Si accounts for 0.4-0.6%, C accounts for 0.4-0.52%, and Ti accounts for 0.02-0.04%, and all the other are cast steel.Described leavening agent is a kind of composite modifier that contains rare earth, titanium, silicon, iron and magnesium.The present invention does the privileged site surface that synthetic medium is placed on arc convex with the Ti-Fe alloy powder, at first Mn, Si, C, Ti-Fe, rare earths material are stirred, because these raw materials all are pulverous, therefore, after stirring, be placed in the casting mold of at first ready making clutch shifter, just these material powders placed the recess of cast shift fork arc convex.Corner scrap melting after will forging then becomes molten steel (high-temperature fusant), adjusting rotten the handling well of chemical composition is poured into it in described casting mold, during solidification of molten steel, Ti, Si take the lead in forming dystectic carbide, play the effect of nucleus, crystal grain thinning improves the form and the distribution of carbide and slag inclusion, improve comprehensive mechanical performance, and casting defect reduces and wear resistance increases substantially.To be that the TiC particle of 1-3 micron is spherical in shape be embedded on the arc convex microstructure of wearing layer, and along with the raising of TiC content, particle size distribution is more even, and wearing layer is finer and close, and wearing layer is that excellent metallurgical combines with the steel base interface.Because the combination property of steel is except depending on key property, also with the hardening constituent form and distribute relevant, can obviously improve its body tissue and carbide morphology and distribution by modes such as the rotten heat treatments of alloy chemical combination, the remarkable refinement of austenite crystal after rotten, smart casting release shifting fork for automobile clutch surface obtains the composite bed that the TiC particle strengthens, carbide then mainly is evenly distributed on the arc convex position of desired design shift fork with granular, thereby obviously improves its wear resistance.Austenite crystal refinement simultaneously can not only effectively reduce casting defects such as loose and shrinkage cavity, but also can obviously reduce the intracrystalline component segregation, purifies crystal boundary relatively, reaches the key that reduces abrasive wear and fatigue fracture.Therefore on the basis of conventional cast structural steel, increase trace alloying element, fundamentally guaranteed the wear resistance of part, and guaranteed its combination property.The clutch release fork of this high abrasion is widely used in the gearbox of heavy-load automobile and tractor.
Claims (3)
1. a release shifting fork for automobile clutch has shift fork body (1), is provided with arc convex (3) on shift fork body (1), it is characterized in that being provided with wearing layer (2) at the outer surface of described arc convex (3).
2. release shifting fork for automobile clutch according to claim 1, it is characterized in that described wearing layer (2) is is raw material with Mn, Si, C, Ti, rare earth, doing rotten the processing by leavening agent at the outer surface of arc convex forms, wherein, described Mn, Si, C, Ti, rare earth weight percent content are that Mn accounts for 1.2-1.8%, and Si accounts for 0.4-0.6%, and C accounts for 0.4-0.52%, Ti accounts for 0.02-0.04%, and all the other are cast steel.
3. release shifting fork for automobile clutch according to claim 3 is characterized in that described leavening agent is a kind of composite modifier that contains rare earth, titanium, silicon, iron and magnesium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910305170A CN101644302A (en) | 2009-08-04 | 2009-08-04 | Release shifting fork for automobile clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910305170A CN101644302A (en) | 2009-08-04 | 2009-08-04 | Release shifting fork for automobile clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101644302A true CN101644302A (en) | 2010-02-10 |
Family
ID=41656305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910305170A Pending CN101644302A (en) | 2009-08-04 | 2009-08-04 | Release shifting fork for automobile clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101644302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105440636A (en) * | 2015-12-22 | 2016-03-30 | 芜湖恒坤汽车部件有限公司 | High-strength clutch shifter material and preparation method thereof |
| CN113981316A (en) * | 2021-10-27 | 2022-01-28 | 温州天和汽车部件有限公司 | High-precision sprocket cold extrusion process |
-
2009
- 2009-08-04 CN CN200910305170A patent/CN101644302A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105440636A (en) * | 2015-12-22 | 2016-03-30 | 芜湖恒坤汽车部件有限公司 | High-strength clutch shifter material and preparation method thereof |
| CN113981316A (en) * | 2021-10-27 | 2022-01-28 | 温州天和汽车部件有限公司 | High-precision sprocket cold extrusion process |
| CN113981316B (en) * | 2021-10-27 | 2022-07-19 | 温州天和汽车部件有限公司 | High-precision sprocket cold extrusion process |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100210 |