CN105755237A - Bearing steel isothermal rolling technology - Google Patents
Bearing steel isothermal rolling technology Download PDFInfo
- Publication number
- CN105755237A CN105755237A CN201410761375.XA CN201410761375A CN105755237A CN 105755237 A CN105755237 A CN 105755237A CN 201410761375 A CN201410761375 A CN 201410761375A CN 105755237 A CN105755237 A CN 105755237A
- Authority
- CN
- China
- Prior art keywords
- cooling
- temperature
- conducting
- bearing steel
- isothermal
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a bearing steel isothermal rolling technology, which consists of the processes of: employing GCr15 bearing steel, conducting multi-pass rolling at a heating temperature of 1150-1200DEG C, and keeping the finish rolling temperature not lower than 1000DEG C to obtain a uniform and fine completely recrystallized austenite structure with no precipitation of secondary carbide; then adopting primary cooling and secondary cooling process; during primary cooling, conducting rapid cooling to a bar surface temperature of 450-500DEG C and a highest self-tempering temperature of 550-600DEG C; during secondary cooling, conducting isothermal phase change at 600DEG C, controlling the phase change speed, then performing heating to a spheroidizing annealing temperature, conducting heat preservation for certain period of time, and conducting cooling at a cooling speed of 130DEG C/h to 650DEG C, and then performing air cooling, or conducting air cooling after isothermal transformation, and then carrying out spheroidizing annealing. The technology provided by the invention is easy to operate, and has low experience requirement for operators.
Description
Technical field
The present invention relates to a kind of bearing steel ausrolling technique.
Background technology
The adjustment in processing step and device parameter etc. of the existing bearing steel ausrolling technique there is also certain empirical and technical, for the operator newly started with, also need to carry out substantial amounts of exercise and could grasp operation skill, produce the good product of quality.
Summary of the invention
In order to realize the purpose of the present invention, the present invention provides the bearing steel ausrolling technique of a kind of easy to operate, quick, easy left-hand seat.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of bearing steel ausrolling technique, including following operation:
Adopting GCr15 bearing steel, adopt the heating-up temperature of 1150-1200 DEG C, through multi-pass rolling, finishing temperature is not less than 1000 DEG C, can obtain uniformly tiny perfect recrystallization austenite structure after rolling, and proeutectoid carbide does not still start to precipitate out；
The technique adopting once cooling and cooling twice after rolling；Once cooling down and be as cold as Surface of Rod Bar temperature 450-500 DEG C soon, the highest red temperature is 550-600 DEG C；
Cooling twice carries out isothermal at 600 DEG C and spends mutually, controls phase velocity, and isothermal post-heating is to spheroidizing temperature, held for some time, is cooled to 650 DEG C with the rate of cooling of 130 DEG C/h, then air cooling, can also air cooling after isothermal transformation again, reheat and carry out spheroidizing.
The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of bearing steel ausrolling technique, including following operation:
Adopting GCr15 bearing steel, adopt the heating-up temperature of 1150-1200 DEG C, through multi-pass rolling, finishing temperature is not less than 1000 DEG C, can obtain uniformly tiny perfect recrystallization austenite structure after rolling, and proeutectoid carbide does not still start to precipitate out；
The technique adopting once cooling and cooling twice after rolling；Once cooling down and be as cold as Surface of Rod Bar temperature 450-500 DEG C soon, the highest red temperature is 550-600 DEG C；
Cooling twice carries out isothermal at 600 DEG C and spends mutually, controls phase velocity, and isothermal post-heating is to spheroidizing temperature, held for some time, is cooled to 650 DEG C with the rate of cooling of 130 DEG C/h, then air cooling, can also air cooling after isothermal transformation again, reheat and carry out spheroidizing；
Research shows, chromium starting temperature 780-840 DEG C, rapid cooling 5-25 DEG C/s of bearing steel rapid cooling, rapid cooling final temperature 500-600 DEG C are to obtain the optimum range of required tissue and performance.
Claims (1)
1. a bearing steel ausrolling technique, is characterized in that: include following operation:
Adopting GCr15 bearing steel, adopt the heating-up temperature of 1150-1200 DEG C, through multi-pass rolling, finishing temperature is not less than 1000 DEG C, can obtain uniformly tiny perfect recrystallization austenite structure after rolling, and proeutectoid carbide does not still start to precipitate out；
The technique adopting once cooling and cooling twice after rolling；Once cooling down and be as cold as Surface of Rod Bar temperature 450-500 DEG C soon, the highest red temperature is 550-600 DEG C；
Cooling twice carries out isothermal at 600 DEG C and spends mutually, controls phase velocity, and isothermal post-heating is to spheroidizing temperature, held for some time, is cooled to 650 DEG C with the rate of cooling of 130 DEG C/h, then air cooling, can also air cooling after isothermal transformation again, reheat and carry out spheroidizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761375.XA CN105755237A (en) | 2014-12-13 | 2014-12-13 | Bearing steel isothermal rolling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761375.XA CN105755237A (en) | 2014-12-13 | 2014-12-13 | Bearing steel isothermal rolling technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105755237A true CN105755237A (en) | 2016-07-13 |
Family
ID=56335835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410761375.XA Pending CN105755237A (en) | 2014-12-13 | 2014-12-13 | Bearing steel isothermal rolling technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105755237A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746932A (en) * | 2017-12-06 | 2018-03-02 | 东北大学 | A kind of preparation method of GCr15 bearing steels |
| CN111876563A (en) * | 2020-08-07 | 2020-11-03 | 江苏联峰实业有限公司 | Rolling process of carbon-chromium bearing steel |
-
2014
- 2014-12-13 CN CN201410761375.XA patent/CN105755237A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746932A (en) * | 2017-12-06 | 2018-03-02 | 东北大学 | A kind of preparation method of GCr15 bearing steels |
| CN107746932B (en) * | 2017-12-06 | 2019-10-01 | 东北大学 | A kind of preparation method of GCr15 bearing steel |
| CN111876563A (en) * | 2020-08-07 | 2020-11-03 | 江苏联峰实业有限公司 | Rolling process of carbon-chromium bearing steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2015128019A (en) | GROUP OF EQUIPMENT FOR THERMAL TREATMENT OF SEAMLESS STEEL PIPE OR PIPELINE AND METHOD FOR PRODUCING PIPE OR PIPELINE FROM HIGH STRENGTH STAINLESS STEEL | |
| CN105855299B (en) | A kind of milling method of steel and the steel obtained using this method | |
| CN105779716A (en) | Heat treatment process for bearing steel | |
| JP2017526823A5 (en) | ||
| CN204490952U (en) | For the protection of quickly cooling device in the isothermal annealed stove of rod iron steel pipe under atmosphere | |
| CN105755237A (en) | Bearing steel isothermal rolling technology | |
| WO2013036166A4 (en) | Method and apparatus for heat treating rails | |
| CN101906518B (en) | Post-forging heat treatment process for nickeliferous dilute alloy round steel | |
| CN106086360A (en) | A kind of heat treatment method of Industrial Steam Turbine Rotors Aided forging | |
| CN102443691B (en) | Steel pipe, method and apparatus for processing steel pipe | |
| CN104789748A (en) | Bearing steel tube spheroidizing annealing method | |
| CN105331794B (en) | A kind of heat-treatment technology method for high-carbon half steel material collars | |
| US20150144234A1 (en) | Microtreatment of carbide containing iron-based alloy and articles resulting therefrom | |
| CN104532139A (en) | High-strength and high-toughness steel ball and production method thereof | |
| CN105755266A (en) | Gear quenching technology | |
| CN105506248B (en) | A kind of medium and high carbon steel crystal grain refinement heat treatment method | |
| RU2008120627A (en) | METHOD AND INSTALLATION FOR CARRYING OUT THE PROCESS OF STRUCTURAL TRANSFORMATION IN THE MATERIAL OF PROCESSES BY DRY METHOD | |
| CN109097547A (en) | A kind of forging of railway bearing seal receptacle and rta technique | |
| CN107988479A (en) | A kind of quasi- differential temperature heat treatment method of large scale roll | |
| CN105755213A (en) | Quenching process of 38CrMoAlA | |
| CN109161647A (en) | The heat treatment method of the middle quenched manganese steel steel-casting of carbon | |
| CN105734592A (en) | Heat treatment technology for 45-steel gear | |
| CN104017952A (en) | Saving-type tempering-free strengthening toughening method for low-alloy high-strength steel products | |
| CN203304294U (en) | Seamless steel tube efficient rolling control water cooling device | |
| CN105734253A (en) | 38 CrMoAlA gear thermal treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |