CN1071463A - Bainite iron and steel parts thermal break quenching technology - Google Patents
Bainite iron and steel parts thermal break quenching technology Download PDFInfo
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- CN1071463A CN1071463A CN 92104526 CN92104526A CN1071463A CN 1071463 A CN1071463 A CN 1071463A CN 92104526 CN92104526 CN 92104526 CN 92104526 A CN92104526 A CN 92104526A CN 1071463 A CN1071463 A CN 1071463A
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Abstract
Bainite iron and steel parts thermal break quenching technology, iron and steel parts reheated the high temperature austenite humidity province or utilize the waste heat of casting, forging, hot-roll forming workpiece, in the normal quenching groove, quench, treat that with cheap quenching medium workpiece quenching to bainite transformation temperature interrupt quenches, workpiece taken out to be deposited in insert the holding furnace tempering in the air after the slow cooling or directly insert the holding furnace tempering, workpiece has good intensity, hardness, toughness and wear resistance.
Compared with the prior art the present invention has a large amount of save energy, reduces facility investment, reduces production costs, advantage such as enhance productivity.Be applicable to the thermal treatment of the products such as abrading-ball that demand is big.
Description
The present invention relates to bainite iron and steel parts quenching technology, specifically bainite iron and steel parts thermal break quenching technology.
Traditional thermal treatment process that the bainite iron and steel parts is adopted is isothermal quenching, and this technology is the production cost height not only, and it is bigger to implement difficulty, can not high-level efficiency produce in enormous quantities.The air quenching method of Chu Xianing (referring to " metal heat treatmet " 1985 the 9th phase P3～8) not only require valuable alloying elements such as Mo, Ni, Cu that higher content is arranged, and the air quenching cooling rate was slow in recent years, and hardening capacity is poor.
The objective of the invention is to, provide and can use cheap quenching medium in the normal quenching groove, simple and easy to do, the thermal break quenching technology that hardening capacity is good can be saved valuable alloying element, guarantees workpiece quality and can obtain the bainite iron and steel parts of high yield.
The invention is characterized in:
Iron and steel parts is reheated 750～950 ℃ (in high temperature austenite humidity provinces), quenching into modulus is 2.3～2.8, degree Beaume is 18～23 sodium silicate solution, treat that workpiece quenching to bainite transformation temperature interrupt quenches, workpiece taken out be deposited in the air slow cooling at least and insert in the holding furnace tempering after 30 minutes or directly insert tempering in the holding furnace, tempering temperature is 250～450 ℃, and tempering insulation time is 2～6 hours;
It is 2.3～2.8 that the iron and steel parts that the iron and steel parts of casting is cooled to 750～950 ℃ (in high temperature austenite humidity provinces) or forging, hot-roll forming is quenched into modulus, degree Beaume is 18～23 the ripples glass aqueous solution, treat that workpiece quenching to bainite transformation temperature interrupt quenches, workpiece taken out be deposited in the air slow cooling at least and insert in the holding furnace tempering after 30 minutes or directly insert tempering in the holding furnace, tempering temperature is 250～450 ℃, and tempering insulation time is 2～6 hours.
Compared with the prior art the present invention has the following advantages:
(1) hardening capacity is good, has reduced the consumption of valuable alloying elements such as Mo, Ni, Cu;
(2) Equipment for Heating Processing such as the high temperature resistance furnace that isothermal quenching is used, salt bath furnace have been saved;
(3) can utilize the hot worked waste heat of workpiece to implement to quench, save energy consumption, shorten the production cycle, can increase substantially work-piece throughput.
This technological operation is simple, production cost is low, production efficiency is high.
Be one embodiment of the present of invention below:
Chemical ingredients (weight %) through the permanent mold casting moulding is: C 3.6, and Si 3.2, and Mn 1.2, Cu 0.6, P 0.09, and S 0.02, and Mg 0.04, ∑ Re 0.03, the nodular cast iron grinding ball of Fe surplus φ 120mm, being cooled to 850 ℃, to quench into modulus be 2.5, degree Beaume is a quenching 2 minutes in 20 the sodium silicate solution, workpiece taken out be deposited in the air slow cooling after 3 hours, again workpiece is inserted the temper that 260 ± 10 ℃ holding furnace carried out 4 hours.The abrading-ball of this moment is (area %): martensite 5～30, and residual austenite 5～20, all the other are the matrix of bainite.The hardness of abrading-ball is HRC48～52, and the centre of sphere is even to the sphere radial stiffness.To the check of abrading-ball body sampling, impelling strength reaches 15J/cm
2
Claims (2)
1, bainite iron and steel parts thermal break quenching technology, workpiece is reheated the high temperature austenite humidity province to quench, the invention is characterized in, workpiece is reheated 750～950 ℃, quenching into modulus is 2.3～2.8, degree Beaume is 18～23 sodium silicate solution, treat that workpiece quenching to bainite transformation temperature interrupt quenches, workpiece taken out be deposited in the air slow cooling at least and insert in the holding furnace tempering after 30 minutes or directly insert tempering in the holding furnace, tempering temperature is 250～450 ℃, and tempering insulation time is 2～6 hours.
2, bainite iron and steel parts thermal break quenching technology, the invention is characterized in, it is 2.3～2.8 that the iron and steel parts that the iron and steel parts of casting is cooled to 750～950 ℃ or forging, hot-roll forming is quenched into modulus, degree Beaume is 18～23 sodium silicate solution, treat that workpiece quenching to bainite transformation temperature interrupt quenches, workpiece taken out be deposited in the air slow cooling at least and insert in the holding furnace tempering after 30 minutes or directly insert tempering in the holding furnace, tempering temperature is 250～450 ℃, and tempering insulation time is 2～6 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104526 CN1027652C (en) | 1992-06-09 | 1992-06-09 | Heat-cutting hardening process for bainite steel workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104526 CN1027652C (en) | 1992-06-09 | 1992-06-09 | Heat-cutting hardening process for bainite steel workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071463A true CN1071463A (en) | 1993-04-28 |
| CN1027652C CN1027652C (en) | 1995-02-15 |
Family
ID=4940852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92104526 Expired - Fee Related CN1027652C (en) | 1992-06-09 | 1992-06-09 | Heat-cutting hardening process for bainite steel workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1027652C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344774C (en) * | 2005-11-01 | 2007-10-24 | 广东工业大学 | 50 steel computer CPU fastener heat treatment process |
| CN101370947B (en) * | 2005-11-10 | 2011-07-27 | C.D.威尔斯霍尔茨有限公司 | Method and device for the continuous creation of a bainite structure in a carbon steel, especially a strip steel |
| CN103468891A (en) * | 2013-09-23 | 2013-12-25 | 无锡阳工机械制造有限公司 | Water-soluble quenching agent |
| CN105238919A (en) * | 2015-10-09 | 2016-01-13 | 湖南三特机械制造有限公司 | Thermal treatment method for thrust wheel |
-
1992
- 1992-06-09 CN CN 92104526 patent/CN1027652C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344774C (en) * | 2005-11-01 | 2007-10-24 | 广东工业大学 | 50 steel computer CPU fastener heat treatment process |
| CN101370947B (en) * | 2005-11-10 | 2011-07-27 | C.D.威尔斯霍尔茨有限公司 | Method and device for the continuous creation of a bainite structure in a carbon steel, especially a strip steel |
| CN103468891A (en) * | 2013-09-23 | 2013-12-25 | 无锡阳工机械制造有限公司 | Water-soluble quenching agent |
| CN105238919A (en) * | 2015-10-09 | 2016-01-13 | 湖南三特机械制造有限公司 | Thermal treatment method for thrust wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1027652C (en) | 1995-02-15 |
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