CN107345268A - A kind of heat treatment method of low-carbon alloy steel chain hinge pin - Google Patents
A kind of heat treatment method of low-carbon alloy steel chain hinge pin Download PDFInfo
- Publication number
- CN107345268A CN107345268A CN201710164298.3A CN201710164298A CN107345268A CN 107345268 A CN107345268 A CN 107345268A CN 201710164298 A CN201710164298 A CN 201710164298A CN 107345268 A CN107345268 A CN 107345268A
- Authority
- CN
- China
- Prior art keywords
- hinge pin
- chain hinge
- heat treatment
- treatment method
- round
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of heat treatment method of low-carbon alloy steel chain hinge pin, solves in the prior art the problem of bearing pin diffusion layer organization is uneven, and hardness gradient is big.The heat treatment method includes step：Round as a ball angle, chain hinge pin to be processed is poured into behind the round as a ball angle of roller and cleans, dry；Carbo-nitriding air cooling, the chain hinge pin behind round as a ball angle is fitted into tilting converter, and at a temperature of 860 DEG C~900 DEG C, is passed through appropriate C3H8、NH3And CH3OH, keep 2~3h, after cool down in atmosphere；Quench tempering, the chain hinge pin after carbo-nitriding air cooling is heated in meshbeltfurnace, heating-up temperature is 840 DEG C~860 DEG C, and atmosphere carbon potential Cp is 1.0 ± 0.1%, NH3Intake is 350 400L/h, CH3OH intakes are 2.4~3.6L/h, and the heat time is 50~70min, and temperature is 160 DEG C~200 DEG C, and tempering time is 120~150min.Chain hinge pin its surface diffusion layer organization that heat treatment method through the present invention is processed is uniform, the hardness gradient mitigation on surface to matrix, substantially increases the anti-wear performance of chain hinge pin.
Description
Technical field
At chain hinge pin technical field of hot working, more particularly to a kind of heat of low-carbon alloy steel chain hinge pin
Reason method.
Background technology
The normal service life stove of low-carbon alloy steel chain hinge pin or continuous furnace at present, are directly quenched using carbo-nitriding
Fire, tempering heat treatment process processing, bearing pin surface obtain acicular martensitic structure, and center portion is low-carbon martensite, such tissue
Bearing pin can be kept to have preferable anti-wear performance, have certain toughness concurrently.It is disadvantageous in that, bearing pin diffusion layer organization is not easy
Even, the hardness gradient on surface to matrix is big, may wear to certain phase rear chain can extend it is too fast.
The content of the invention
To solve the defects of above-mentioned technology is present, the invention provides a kind of wearability for improving chain hinge pin, extends
The heat treatment method of the low-carbon alloy steel chain hinge pin of chain service life.
Technical scheme is used by the present invention realizes above-mentioned technique effect：
A kind of heat treatment method of low-carbon alloy steel chain hinge pin, including step：
1) round as a ball angle, chain hinge pin to be processed is poured into behind the round as a ball angle of roller and cleans, dry；
2) carbo-nitriding air cooling, the chain hinge pin behind round as a ball angle is fitted into tilting converter, and 860 DEG C~900
At a temperature of DEG C, appropriate C is passed through3H8、NH3And CH3OH, keep 2~3h, after cool down in atmosphere；
3) to quench tempering, the chain hinge pin after carbo-nitriding air cooling is heated in meshbeltfurnace, heating-up temperature is 840 DEG C~
860 DEG C, atmosphere carbon potential Cp is 1.0 ± 0.1%, NH3Intake is 350-400L/h, CH3OH intakes are 2.4~3.6L/h, are added
The hot time is 50~70min, and temperature is 160 DEG C~200 DEG C, and tempering time is 120~150min.
The present invention compared with prior art, has advantages below and effect：The chain that heat treatment method through the present invention is processed
Its surface diffusion layer organization of bar bearing pin is uniform, and the hardness gradient on surface to matrix relaxes, and substantially increases the wearability of chain hinge pin
Energy, extend the service life of chain.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the carbo-nitriding air cooling process curve figure of the present invention；
Fig. 2 is the tempering process curve map of quenching of the present invention；
Fig. 3 is the nitrided layer hardness gradient map of chain hinge pin produced by the present invention；
Fig. 4 is the depth of penetration figure of chain hinge pin produced by the present invention；
Fig. 5 is the diffusion layer organization figure of chain hinge pin produced by the present invention.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The specific embodiment of the present invention.
The invention discloses a kind of heat treatment method of low-carbon alloy steel chain hinge pin, the heat treatment method includes step：
S1, round as a ball angle, chain hinge pin to be processed is poured into behind the round as a ball angle of roller and cleans, dry；
S2, carbo-nitriding air cooling, the chain hinge pin behind round as a ball angle is fitted into tilting converter, and 860 DEG C~900
At a temperature of DEG C, appropriate C is passed through3H8、NH3And CH3OH, keep 2~3h, after cool down in atmosphere；
S3, tempering of quenching, the chain hinge pin after carbo-nitriding air cooling is heated in meshbeltfurnace, heating-up temperature be 840 DEG C~
860 DEG C, atmosphere carbon potential Cp is 1.0 ± 0.1%, NH3Intake is 350-400L/h, CH3OH intakes are 2.4~3.6L/h, are added
The hot time is 50~70min, and temperature is 160 DEG C~200 DEG C, and tempering time is 120~150min.
As shown in Figures 1 to 5, the correlogram for heat treatment and the depth of penetration of chain hinge pin that is thermally treated resulting in and
Diffusion layer organization figure.Wherein, Fig. 4 is that the infiltration layer of heat treatment rear chain bearing pin amplifies 100 times of development figure, figure under an optical microscope
5 be that the infiltration layer of heat treatment rear chain bearing pin amplifies 400 times of development figure under an optical microscope.In the rank for tempering step of quenching
Section, carbo-nitriding temperature is relatively low, carbon potential can be adjusted flexibly according to the depth of infiltration layer after air cooling, carry out benefit and ooze or expand
Dissipate, thicken infiltration layer, gentle carbon profile, the hardness transition on surface to matrix relaxes, and bond strength is high, and can effectively reduce block
The appearance of shape and net carbide tissue.Chain hinge pin its surface diffusion layer organization that heat treatment method through the present invention is processed is equal
Even, the hardness gradient on surface to matrix relaxes, and substantially increases the anti-wear performance of chain hinge pin, and extend chain uses the longevity
Life.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that described in above-described embodiment and specification is the present invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention, the protection domains of application claims by appended claims and its
Equivalent defines.
Claims (1)
1. a kind of heat treatment method of low-carbon alloy steel chain hinge pin, it is characterised in that including step：
1）Round as a ball angle, chain hinge pin to be processed is poured into behind the round as a ball angle of roller and cleans, dry；
2）Carbo-nitriding air cooling, the chain hinge pin behind round as a ball angle is fitted into tilting converter, and
At a temperature of 860 DEG C~900 DEG C, be passed through the appropriate H 8 of C 3, NH 3 and the OH of CH 3, keep 2~3h, after in sky
Gas
Middle cooling；
3）Quench tempering, the chain hinge pin after carbo-nitriding air cooling is heated in meshbeltfurnace, heating-up temperature is
840 DEG C~860 DEG C, atmosphere carbon potential Cp is that the intakes of 1.0 ± 0.1%, NH 3 are 350-400L/h, the OH of CH 3
Intake is 2.4~3.6L/h, and the heat time is 50~70min, and temperature is 160 DEG C~200 DEG C,
Tempering time is 120~150min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164298.3A CN107345268A (en) | 2017-03-20 | 2017-03-20 | A kind of heat treatment method of low-carbon alloy steel chain hinge pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164298.3A CN107345268A (en) | 2017-03-20 | 2017-03-20 | A kind of heat treatment method of low-carbon alloy steel chain hinge pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107345268A true CN107345268A (en) | 2017-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164298.3A Pending CN107345268A (en) | 2017-03-20 | 2017-03-20 | A kind of heat treatment method of low-carbon alloy steel chain hinge pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107345268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220541A (en) * | 2018-01-17 | 2018-06-29 | 杭州自强链传动有限公司 | A kind of heat treatment method of medium carbon alloy steel chain hinge pin |
| CN110144546A (en) * | 2019-03-15 | 2019-08-20 | 博格华纳汽车零部件(宁波)有限公司 | A kind of engine timing chain pin shaft carbonitriding technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1393303A (en) * | 2001-06-29 | 2003-01-29 | 宣碧华 | Method for manufacturing chain |
| CN103008648A (en) * | 2012-12-28 | 2013-04-03 | 杭州东华链条集团有限公司 | Novel manufacturing method of maintenance-free chain |
| CN105274289A (en) * | 2015-11-02 | 2016-01-27 | 杭州持正科技股份有限公司 | Special process for bearing steel pin roll |
| CN105886739A (en) * | 2016-05-03 | 2016-08-24 | 成都亨通兆业精密机械有限公司 | Processing technology for hinge shaft for low temperature environment |
-
2017
- 2017-03-20 CN CN201710164298.3A patent/CN107345268A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1393303A (en) * | 2001-06-29 | 2003-01-29 | 宣碧华 | Method for manufacturing chain |
| CN103008648A (en) * | 2012-12-28 | 2013-04-03 | 杭州东华链条集团有限公司 | Novel manufacturing method of maintenance-free chain |
| CN105274289A (en) * | 2015-11-02 | 2016-01-27 | 杭州持正科技股份有限公司 | Special process for bearing steel pin roll |
| CN105886739A (en) * | 2016-05-03 | 2016-08-24 | 成都亨通兆业精密机械有限公司 | Processing technology for hinge shaft for low temperature environment |
Non-Patent Citations (3)
| Title |
|---|
| 中国机械工程学会热处理学会: "《热处理手册 第3卷 热处理设备和工辅材料 第4版修订本》", 31 August 2013, 机械工业出版社 * |
| 吴元徽: "《热处理工技师鉴定培训教材》", 31 May 2014, 机械工业出版社 * |
| 廖诚等: "石油链销轴强韧化处理及其对性能的影响", 《热处理技术与装备》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220541A (en) * | 2018-01-17 | 2018-06-29 | 杭州自强链传动有限公司 | A kind of heat treatment method of medium carbon alloy steel chain hinge pin |
| CN110144546A (en) * | 2019-03-15 | 2019-08-20 | 博格华纳汽车零部件(宁波)有限公司 | A kind of engine timing chain pin shaft carbonitriding technology |
| CN110144546B (en) * | 2019-03-15 | 2021-07-06 | 博格华纳汽车零部件(宁波)有限公司 | Carbonitriding process for pin shaft of timing chain of engine |
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