CN101892450B - Nitrocarburizing treatment method of pin shaft of engine toothed chain - Google Patents
Nitrocarburizing treatment method of pin shaft of engine toothed chain Download PDFInfo
- Publication number
- CN101892450B CN101892450B CN2010101684397A CN201010168439A CN101892450B CN 101892450 B CN101892450 B CN 101892450B CN 2010101684397 A CN2010101684397 A CN 2010101684397A CN 201010168439 A CN201010168439 A CN 201010168439A CN 101892450 B CN101892450 B CN 101892450B
- Authority
- CN
- China
- Prior art keywords
- carbonitriding
- pin shaft
- bearing pin
- treatment method
- stove
- 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.)
- Active
Links
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a nitrocarburizing treatment method of a pin shaft of an engine toothed chain, comprising the following steps of: firstly, coarse grinding treatment, wherein the surface roughness is not greater than Rz 0.8; secondly, nitrocarburizing treatment; and thirdly, fine grinding treatment, wherein the surface roughness is not greater than Rz0.6. By adopting the treatment method, the pin shaft has high surface hardness, good stability, high surface roughness, high wear resistance and corrosion resistance and high temperature resistance and can completely meet the requirement of high performance of the chain.
Description
Technical field
The invention belongs to the engine chain production technique, be specifically related to a kind of nitrocarburizing treatment method of pin shaft of engine toothed chain.
Background technology
Silent chain is a kind of widely used important mechanical basic part; Particularly under the operating mode of high speed, heavy duty, lower noise, big width between centers; Its transmission performance is superior to cog belt transmission, geartransmission and roller chain drives, has become one of first-selected type of belt drive of numerous industries.The transmission in correct time of motor car engine in recent years, lubricating oil pump, common rail pump, HPP, balancing shaft etc.; Variator, transfer case, motorcycle, fork truck, turbine, aircraft, boats and ships, lathe, industrial pump; And in other high speed transmissions, various forms of silent chains have been used more and more widely.
Demand for development along with motor car engine high-performance, high life; Engine toothed chain develops towards the direction of HS, high-wearing feature, high resistance to fatigue, high work-ing life, low operation noise; Satisfy above-mentioned demand for development, each component quality of chain is extremely important, so each chain manufacturer; All in the raising of chain component quality, increase input, make the quality of chain steadily improve.
With the motor car engine is example, in lot of domestic and foreign brand automobile mover and wheel box, the transfer case, has all adopted the silent chain series product of different structure form, different mesh mechanisms, and has had much the development trend that replaces the cog belt transmission gradually in recent years.In order to satisfy the growth requirement of motor car engine, the heat treatment hardness of silent chain bearing pin and surface quality are particularly important.In order to produce a desired effect, generally adopt carbonitriding or nitrogen-carbon cocementing process, the silent chain bearing pin is handled.General carbonitriding technology can only guarantee the surface hardness of bearing pin greater than 700HV, and general nitrogen-carbon cocementing process can guarantee the surface hardness of bearing pin greater than 850HV, but the too low requirement that can not satisfy its intensity of centre hardness, and the process time is oversize, and cost is too high.
Summary of the invention
In order to overcome the above-mentioned defective that the prior art field exists; The objective of the invention is to; A kind of nitrocarburizing treatment method of pin shaft of engine toothed chain is provided; Improve engine toothed chain bearing pin surface hardness, surfaceness, stability, reach high abrasion, corrosion-resistant, resistant to elevated temperatures high performance requirements.
The nitrocarburizing treatment method of pin shaft of engine toothed chain provided by the invention, the technical scheme of employing comprises the steps:
The first step: the bearing pin blank that cuts off is not carried out coarse grinding treatment through being in the mood for petty bed, reach surfaceness :≤Rz0.8.
Second step: carbonitriding is handled: 1. shove charge: the part that coarse grinding treatment is good, in the carbonitriding electric furnace of packing into; 2. nitriding: heat temperature raising is to 680-780 ℃, and insulation 30-40min adds penetration enhancer in stove in the time of heating, and ammonia is according to 3-5l/min, and methyl alcohol is according to 3-5ml/min; 3. carbonitriding: then continue heat temperature raising to 840-870 ℃, insulation 50-60min adds penetration enhancer in stove in the time of heating; Ammonia is according to 3-51/min, and methyl alcohol is according to 3-5ml/min, and propane is according to 5-7 liter/min; 4. quench: oil cooling, oily temperature control is at 20-80 ℃; 5. tempering: under temperature 180-200 ℃ condition, insulation 120-180min; 6. the cooling of coming out of the stove: in air, be cooled to normal temperature.
The 3rd step: be not in the mood for petty bed correct grinding to the good bearing pin of thermal treatment through high precision and handle, reach surfaceness :≤Rz0.6.
The nitrocarburizing treatment method of pin shaft of engine toothed chain provided by the invention; Its beneficial effect is, adopts this treatment process, bearing pin surface hardness height and good stability, surfaceness height; Have high abrasion, corrosion-resistant, resistance to elevated temperatures, can satisfy the high performance requirement of chain fully.
Embodiment
Below in conjunction with an embodiment, the nitrocarburizing treatment method of pin shaft of engine toothed chain provided by the invention is carried out detailed explanation.
Embodiment
The nitrocarburizing treatment method of pin shaft of the engine toothed chain of present embodiment is following:
A kind of material of silent chain bearing pin is 38CrMoAl, handles as follows:
The first step: the bearing pin blank that cuts off is not carried out coarse grinding treatment through being in the mood for petty bed, reach surfaceness :≤Rz0.8.
Second step: carbonitriding is handled: 1. shove charge: the part that coarse grinding treatment is good, in the carbonitriding electric furnace of packing into; 2. nitriding: heat temperature raising to 720 ℃, insulation 30min adds penetration enhancer in stove in the time of heating, and ammonia is according to 5 liters/min, and methyl alcohol is according to 3-5ml/min; 3. carbonitriding: then continue heat temperature raising to 860 ℃, insulation 50min adds penetration enhancer in stove in the time of heating, and ammonia is according to 5 liters/min, and methyl alcohol is according to 3-5ml/min, and 4. propane quench according to 5-7 liter/min: oil cooling, and oily temperature control is at 20-80 ℃; 5. tempering: under temperature 180-200 ℃ condition, insulation 180min; 6. the cooling of coming out of the stove: in air, be cooled to normal temperature.
The 3rd step: be not in the mood for petty bed correct grinding to the good bearing pin of thermal treatment through high precision and handle, reach surfaceness :≤Rz0.6.
Nitrocarburizing treatment method of pin shaft through engine toothed chain provided by the invention; The bearing pin surface hardness is greater than 870HV, and centre hardness is greater than 550HV, and depth of penetration is 0.3mm; Through bench testing and mover installation test, its wear resisting property and work-ing life etc. have all improved more than 2 times.
Claims (1)
1. the nitrocarburizing treatment method of pin shaft of an engine toothed chain; Before bearing pin being carried out the carbonitriding processing; Earlier bearing pin is carried out coarse grinding treatment, the bearing pin blank that cuts off is not carried out coarse grinding treatment through being in the mood for petty bed, reach surfaceness≤Rz0.8; It is characterized in that: the carbonitriding processed steps is: 1. shove charge: the part that coarse grinding treatment is good, in the carbonitriding electric furnace of packing into; 2. nitriding: heat temperature raising is to 680-780 ℃, and insulation 30-40min adds penetration enhancer in stove in the time of heating, and ammonia is according to 3-5l/min, and methyl alcohol is according to 3-5ml/min; 3. carbonitriding: then continue heat temperature raising to 840-870 ℃, insulation 50-60min adds penetration enhancer in stove in the time of heating; Ammonia is according to 3-5l/min, and methyl alcohol is according to 3-5ml/min, and propane is according to 5-7 liter/min; 4. quench: oil cooling, oily temperature control is at 20-80 ℃; 5. tempering: under temperature 180-200 ℃ condition, insulation 120-180min; 6. the cooling of coming out of the stove: in air, be cooled to normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101684397A CN101892450B (en) | 2010-05-11 | 2010-05-11 | Nitrocarburizing treatment method of pin shaft of engine toothed chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101684397A CN101892450B (en) | 2010-05-11 | 2010-05-11 | Nitrocarburizing treatment method of pin shaft of engine toothed chain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101892450A CN101892450A (en) | 2010-11-24 |
| CN101892450B true CN101892450B (en) | 2012-07-04 |
Family
ID=43101793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101684397A Active CN101892450B (en) | 2010-05-11 | 2010-05-11 | Nitrocarburizing treatment method of pin shaft of engine toothed chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101892450B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021588A (en) * | 2010-12-04 | 2011-04-20 | 江苏飞船股份有限公司 | 20Cr2Ni4A steel carburizing and nitrocarburizing multiplex heat treatment process |
| CN103556108A (en) * | 2013-11-07 | 2014-02-05 | 山东新金发汽车零部件有限公司 | Method for improving hardness of low-carbon steel nitride product |
| CN104372294B (en) * | 2014-11-19 | 2017-06-13 | 杭州持正科技有限公司 | The special bearing pin of engine chain and vacuum ionic depositing process |
| CN105401120A (en) * | 2015-11-02 | 2016-03-16 | 杭州持正科技股份有限公司 | Engine timing chain pin shaft and low-temperature stepped carbonitriding process |
| 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 |
| CN105689633B (en) * | 2016-01-29 | 2019-02-01 | 湖州求精汽车链传动有限公司 | Nonstandard silent chain processing method and nonstandard silent chain |
| CN106086771B (en) * | 2016-08-10 | 2018-08-14 | 奇瑞汽车股份有限公司 | Gas carburizing heat treatment process for gasoline engine timing chain axis pin |
| 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 |
| CN113999953B (en) * | 2021-10-08 | 2022-09-20 | 清华大学 | Chemical heat treatment method of high-hardness 38CrMoAl nitrided steel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2765890B1 (en) * | 1997-07-10 | 1999-08-20 | Ascometal Sa | PROCESS FOR MANUFACTURING A MECHANICAL PART IN CEMENTED OR CARBONITRIDE STEEL AND STEEL FOR THE MANUFACTURE OF SUCH A PART |
| FR2777910B1 (en) * | 1998-04-27 | 2000-08-25 | Air Liquide | METHOD FOR REGULATING THE CARBON POTENTIAL OF A HEAT TREATMENT ATMOSPHERE AND METHOD FOR HEAT TREATMENT IMPLEMENTING SUCH REGULATION |
| US8414710B2 (en) * | 2004-02-04 | 2013-04-09 | Honda Motor Co., Ltd. | Method for surface treatment of metal material |
| CN101353801A (en) * | 2008-09-12 | 2009-01-28 | 余煌 | Anti-corrosion and heat tinting composite surface treating method for steel |
-
2010
- 2010-05-11 CN CN2010101684397A patent/CN101892450B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101892450A (en) | 2010-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101892450B (en) | Nitrocarburizing treatment method of pin shaft of engine toothed chain | |
| JP5432451B2 (en) | Steel member, heat treatment method thereof, and production method thereof | |
| CN104357796B (en) | The carburizing quenching process of automobile gear | |
| CN105177492A (en) | Carburizing and quenching heat treatment process of driven reverse gear used for transmissions | |
| CN102091921A (en) | Method for manufacturing bevel gear of axle gear box for diesel locomotives | |
| CN105643218A (en) | Machining method of gear parts of gearbox | |
| CN105643219A (en) | Machining technology for gear shaft | |
| CN102877073A (en) | Technology for processing CrNiMo series steel material | |
| CN104762629A (en) | Processing technology for gearbox gear | |
| CN103635717B (en) | Drive plate and manufacture method thereof | |
| CN110306012A (en) | A kind of ring gear surface induction hardening processing method | |
| CN1831303A (en) | Rolling bearing | |
| CN102943168B (en) | Rolling bearing manufactured by special heat treatment process | |
| CN104831048A (en) | Heat treatment process for hull steel crankshaft | |
| CN1131338C (en) | Two-stage carbonitriding technology for gear | |
| CN101724808B (en) | Surface carburization processing method for steel bearing ring of high-carbon chromium bearing | |
| KR100793702B1 (en) | Heat treatment method for gear and shaft of auto transmission | |
| CN109530819A (en) | The manufacturing method of harmonic wave speed reducing machine firm gear | |
| CN102618701A (en) | Treatment method for replacing quenching and tempering through high-temperature tempering after 2Cr13 steel controlled rolling and cooling | |
| CN101892369B (en) | Method for strengthening engine chain | |
| EP2134879B1 (en) | Method for producing a crankshaft, in particular for diesel engines | |
| CN109055668A (en) | A kind of quenching technical of long-term unidirectional out of balance load dedicated gear | |
| KR100737602B1 (en) | A constant velocity join cage of a vehicle and the method thereof | |
| CN109022689A (en) | A kind of quenching of gear teeth unilateral side or non-uniform hardening technique of the dedicated heavy-duty gear of fork truck | |
| JP6160054B2 (en) | High surface pressure resistant parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266705, 112, Hongkong Road, Qingdao overseas Chinese science and Technology Park, Pingdu City, Shandong Province Patentee after: Qingdao Choho Industrial Co., Ltd. Address before: 266705, 112, Hongkong Road, Qingdao overseas Chinese science and Technology Park, Pingdu City, Shandong Province Patentee before: Qingdao Choho Industrial Co., Ltd. |