CN105755476A - Heat treatment process for gear steel - Google Patents
Heat treatment process for gear steel Download PDFInfo
- Publication number
- CN105755476A CN105755476A CN201410775671.5A CN201410775671A CN105755476A CN 105755476 A CN105755476 A CN 105755476A CN 201410775671 A CN201410775671 A CN 201410775671A CN 105755476 A CN105755476 A CN 105755476A
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- CN
- China
- Prior art keywords
- heat treatment
- treatment process
- gear
- heating processing
- carburizing
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- 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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- Heat Treatment Of Articles (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a heat treatment process for gear steel. The heat treatment process comprises the following steps: A, surface hardening; B, carburizing and quenching; C, surface nitriding and chemical heat treatment; D, hardening and tempering; and E, normalization. The heat treatment process enables the performance of surface structure of the gear steel to be greatly improved and the phenomenon of gear breakage to be prevented.
Description
Technical field
The present invention relates to a kind of pinion steel Technology for Heating Processing.
Background technology
In prior art, in pinion steel heat treatment process, gear can increase the intensity of hardened layer through carbo-nitriding, but due to misoperation, may result in surface layer excessive concentration, be that the carbide precipitated out precipitates out with horn shape or netted form, can cause that tissue surface structure property seriously reduces, easily produce tooth to collapse, and easily stress is concentrated.
Summary of the invention
It is an object of the invention to provide a kind of pinion steel Technology for Heating Processing.
The present invention be the technical scheme is that a kind of pinion steel Technology for Heating Processing for achieving the above object, comprises the following steps: A, carries out surface hardening；B, carburizing and quenching；C, surface carburization thermo-chemical treatment；D, carry out modified；E, normalized treatment.
In described step A, after surface hardening, tooth face hardness is generally 40～55HRC.
In described step B, after carburizing and quenching, tooth face hardness is up to 56～62HRC.
One pinion steel Technology for Heating Processing of the present invention, can make tissue surface structure property significantly be improved, will not produce tooth disintegration phenomenon.
Detailed description of the invention
Pinion steel Technology for Heating Processing, comprises the following steps: A, carry out surface hardening, and after surface hardening, tooth face hardness is generally 40～55HRC, is characterized as being resisting fatigue spot corrosion, antiscuffing capacity high, and wearability is good；Owing to hardening in end, tooth heart portion, gear still has enough toughness, can bear little shock loading；B, carburizing and quenching, after carburizing and quenching, tooth face hardness is up to 56～62HRC, and tooth heart portion still keeps higher toughness, the gear teeth to hold curved intensity and contact strength of tooth surface high, wearability is better, the important gear drive of the load that is usually used in being hit, and gear is after carburizing and quenching, gear tooth deformation is relatively big, should carry out roll flute；C, surface carburization thermo-chemical treatment, other heat treatments it are made without after nitriding, tooth face hardness is up to 700～900HV, owing to the gear hardness after Nitrizing Treatment is high, technological temperature is low, deforms little, therefore is applicable to internal gear and is difficult to the gear of grinding, it is usually used in the nitrided steel containing alloying elements such as chromium, copper, lead, such as 38CrMoAlA；D, carrying out modified, after modifier treatment, tooth face hardness is generally 220～280HBS, and because hardness is not high, gear teeth polish can carry out after heat treatment；E, normalized treatment, normalizing can eliminate internal stress, crystal grain thinning, improves mechanical property and cutting ability.The pinion steel Technology for Heating Processing of the present invention, can make tissue surface structure property significantly be improved, will not produce tooth disintegration phenomenon.
Claims (3)
1. a pinion steel Technology for Heating Processing, it is characterised in that: comprise the following steps:
A, carry out surface hardening；B, carburizing and quenching；C, surface carburization thermo-chemical treatment；D, carry out modified；E, normalized treatment.
2. a kind of pinion steel Technology for Heating Processing according to claim 1, it is characterised in that: in described step A, after surface hardening, tooth face hardness is generally 40～55HRC.
3. a kind of pinion steel Technology for Heating Processing according to claim 1, it is characterised in that: in described step B, after carburizing and quenching, tooth face hardness is up to 56～62HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410775671.5A CN105755476A (en) | 2014-12-13 | 2014-12-13 | Heat treatment process for gear steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410775671.5A CN105755476A (en) | 2014-12-13 | 2014-12-13 | Heat treatment process for gear steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105755476A true CN105755476A (en) | 2016-07-13 |
Family
ID=56336584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410775671.5A Pending CN105755476A (en) | 2014-12-13 | 2014-12-13 | Heat treatment process for gear steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105755476A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861936A (en) * | 2016-05-10 | 2016-08-17 | 杜树芳 | Heat treatment method for age hardening type nitriding gear steel |
| CN107794532A (en) * | 2017-11-10 | 2018-03-13 | 徐州华瑞机械锻造有限公司 | A kind of heat treatment method of gear |
-
2014
- 2014-12-13 CN CN201410775671.5A patent/CN105755476A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861936A (en) * | 2016-05-10 | 2016-08-17 | 杜树芳 | Heat treatment method for age hardening type nitriding gear steel |
| CN107794532A (en) * | 2017-11-10 | 2018-03-13 | 徐州华瑞机械锻造有限公司 | A kind of heat treatment method of gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |
|
| WD01 | Invention patent application deemed withdrawn after publication |