CN104745789A - Novel isothermal rolling process for bearing steel - Google Patents
Novel isothermal rolling process for bearing steel Download PDFInfo
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- CN104745789A CN104745789A CN201310727665.8A CN201310727665A CN104745789A CN 104745789 A CN104745789 A CN 104745789A CN 201310727665 A CN201310727665 A CN 201310727665A CN 104745789 A CN104745789 A CN 104745789A
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- bearing steel
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- rolling process
- steel
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Abstract
The invention discloses a novel isothermal rolling process for bearing steel, and relates to theory production process lines or production procedures of controlled rolling, controlled cooling and on-line spheroidizing annealing of the bearing steel. According to the proposed novel process and theory, an existing steel-rolling workshop can be appropriately transformed to establish novel production process lines or production procedures. The novel process is of great significance to improvement of the quality of the bearing steel, prolonging of the fatigue life of the bearing steel and energy conservation.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of bearing steel ausrolling novel process.
Background technology
Improve the quality of bearing steel, improve the fatigue lifetime of bearing part, Simplified flowsheet, saving the energy is the key subjects that smelting, rolling and thermal treatment worker carry out studying always.It is enough after deliberation on the impact of its structure and properties for the smelting technology of bearing during the last ten years.Also more work has been carried out at the carbide annealing process of bearing steel and the nodularization process of carbide.In the last few years, the recrystallization behavior in bearing steel course of hot rolling, the phase transformation under texturizing condition and roll rear controlled cooling model and be studied, obtained many achievements.But to the new process development of rolling bearings steel then study fewer.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, a kind of bearing steel ausrolling novel process is provided, improve the fatigue lifetime of bearing steel, save the energy.
Bearing steel ausrolling novel process provided by the invention, comprises the following steps:
(1) on 400 milling trains, the bearing steel bar of middle φ 28 ~ 42 has been shut out
(2) by blank heating to 900 ~ 1100 DEG C;
(3) be cooled to 720 ~ 800 DEG C of ausrollings, deflection reaches 100% ~ 160%;
(4) half an hour more than is incubated at 780 DEG C;
(5) about 650 DEG C are cooled to 10 ~ 60 DEG C/h speed;
(6) adopt air cooling, satisfactory spherodized structure and hardness can be reached.
Bearing steel ausrolling novel process provided by the invention, its beneficial effect is, can obtain tiny spheroidized carbide, and existing mill, on tiny ferrite matrix, is carried out appropriate reconstruction by disperse, to set up new line of production technology or Production Flow Chart.To the quality improving bearing steel, improve the fatigue lifetime of bearing steel, save the energy all significant.
Embodiment
Below in conjunction with an embodiment, bearing steel ausrolling novel process provided by the invention is described in detail.
Embodiment
The bearing steel ausrolling novel process of the present embodiment, comprises the following steps:
(1) on 400 milling trains, the bearing steel bar of middle φ 28 ~ 42 has been shut out
(2) by blank heating to 1000 DEG C;
(3) be cooled to 750 DEG C of ausrollings, deflection reaches 150%;
(4) half an hour is incubated at 780 DEG C;
(5) 650 DEG C are cooled to 20 DEG C/h speed;
(6) adopt air cooling, satisfactory spherodized structure and hardness can be reached.
Claims (1)
1. a bearing steel ausrolling novel process, is characterized in that: said method comprising the steps of:
400 milling trains have shut out the bearing steel bar of middle φ 28 ~ 42;
By blank heating to 900 ~ 1100 DEG C;
Be cooled to 720 ~ 800 DEG C of ausrollings, deflection reaches 100% ~ 160%;
Half an hour more than is incubated at 780 DEG C;
About 650 DEG C are cooled to 10 ~ 60 DEG C/h speed;
Adopt air cooling, satisfactory spherodized structure and hardness can be reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727665.8A CN104745789A (en) | 2013-12-26 | 2013-12-26 | Novel isothermal rolling process for bearing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727665.8A CN104745789A (en) | 2013-12-26 | 2013-12-26 | Novel isothermal rolling process for bearing steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104745789A true CN104745789A (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310727665.8A Pending CN104745789A (en) | 2013-12-26 | 2013-12-26 | Novel isothermal rolling process for bearing steel |
Country Status (1)
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| CN (1) | CN104745789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138660A (en) * | 2017-06-28 | 2017-09-08 | 武汉理工大学 | A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization |
| CN108277326A (en) * | 2018-04-11 | 2018-07-13 | 东北大学 | A kind of Quick spheroidizing annealing technology method of GCr15 bearing steels |
| CN109759447A (en) * | 2019-01-08 | 2019-05-17 | 邯郸钢铁集团有限责任公司 | Bearing steel milling method based on walking beam furnace |
-
2013
- 2013-12-26 CN CN201310727665.8A patent/CN104745789A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138660A (en) * | 2017-06-28 | 2017-09-08 | 武汉理工大学 | A kind of high-carbon-chromium bearing steel warm-rolling loop forming method for realizing tissue nodularization |
| WO2019001262A1 (en) * | 2017-06-28 | 2019-01-03 | 武汉理工大学 | Process for forming, by means of warm ring rolling, high-carbon chromium bearing steel capable of structure spheroidization |
| CN108277326A (en) * | 2018-04-11 | 2018-07-13 | 东北大学 | A kind of Quick spheroidizing annealing technology method of GCr15 bearing steels |
| CN109759447A (en) * | 2019-01-08 | 2019-05-17 | 邯郸钢铁集团有限责任公司 | Bearing steel milling method based on walking beam furnace |
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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: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |