CN103484613B - Quenching method for steel NO. 50 - Google Patents
Quenching method for steel NO. 50 Download PDFInfo
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- CN103484613B CN103484613B CN201310441154.XA CN201310441154A CN103484613B CN 103484613 B CN103484613 B CN 103484613B CN 201310441154 A CN201310441154 A CN 201310441154A CN 103484613 B CN103484613 B CN 103484613B
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Abstract
The invention discloses a quenching method for steel NO. 50. The method comprises the following steps: a workpiece of steel NO. 50 is kept warm at 830 to 870 DEG C, and quenching the workpiece of steel NO. 50 in a mixed solution of sodium fluoride and ammonium persulfate under the temperature of minus 15 DEG C to minus 10 DEG C, staying for 30 to 45 minutes and then taking out the workpiece. After the method is adopted, the mechanical strength and the tenacity of the steel NO. 50 can be improved, and the service life of the workpiece can be prolonged.
Description
Technical field
The present invention relates to a kind of quenching method of No. 50 steel.
Background technology
No. 50 steel (S50C steel) are a kind of industrial application medium carbon steel widely, carbon content >=0.4wt%, requires high machined piece and spring part for the manufacture of wear resistance, as forging gear, pull bar, axle etc., but its hardening capacity is poor, hinder the further improvement of its mechanical property.
Summary of the invention
The object of this invention is to provide a kind of quenching method of No. 50 steel, to improve the mechanical property of No. 50 steel.
To achieve these goals, the invention provides following technical scheme:
A quenching method for No. 50 steel, comprising: No. 50 steel workpieces are after 830 ~ 870 DEG C of insulations, and temperature of being quenched by No. 50 steel workpieces is in the mixed aqueous solution of the Sodium Fluoride of-15 DEG C ~-10 DEG C and ammonium persulphate, keeps taking-up after 30 ~ 45 minutes.
Further, in the mixed aqueous solution of described Sodium Fluoride and ammonium persulphate, the concentration of Sodium Fluoride is 1 ~ 2wt%, and the concentration of ammonium persulphate is 1 ~ 1.5wt%.
Further, described No. 50 steel workpieces are at 830 ~ 870 DEG C of insulation 20 ~ 40min.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1
No. 50 steel workpieces are loaded in stove, rise to 830 DEG C, insulation 40min, again No. 50 steel workpieces are taken out in stove, temperature of quenching is in the mixed aqueous solution of the Sodium Fluoride of-15 DEG C and ammonium persulphate (concentration of sodium fluoride is 2wt%+ ammonium persulfate concentrations is 1.5wt%), keep taking out after 30 minutes, solution carries out circulating cooling.After quenching, workpiece is indeformable, do not ftracture.
Comparative example 1: the Sodium Fluoride in the sodium chloride aqueous solution alternate embodiment 1 of use 3.5wt% and the mixed aqueous solution of ammonium persulphate, other processing condition are identical with embodiment 1.
Embodiment 2
No. 50 steel workpieces are loaded in stove, rise to 840 DEG C, insulation 40min, again No. 50 steel workpieces are taken out in stove, temperature of quenching is in the mixed aqueous solution of the Sodium Fluoride of-15 DEG C and ammonium persulphate (concentration of sodium fluoride is 1wt%+ ammonium persulfate concentrations is 1.5wt%), keep taking out after 35 minutes, solution carries out circulating cooling.After quenching, workpiece is indeformable, do not ftracture.
Comparative example 2: the Sodium Fluoride in the sodium chloride aqueous solution alternate embodiment 2 of use 2.5wt% and the mixed aqueous solution of ammonium persulphate, other processing condition are identical with embodiment 2.
Embodiment 3
No. 50 steel workpieces are loaded in stove, rise to 870 DEG C, insulation 20min, again No. 50 steel workpieces are taken out in stove, temperature of quenching is in the mixed aqueous solution of the Sodium Fluoride of-10 DEG C and ammonium persulphate (concentration of sodium fluoride is 1wt%+ ammonium persulfate concentrations is 1wt%), keep taking out after 45 minutes, solution carries out circulating cooling.After quenching, workpiece is indeformable, do not ftracture.
Comparative example 3: the Sodium Fluoride in the sodium chloride aqueous solution alternate embodiment 3 of use 2wt% and the mixed aqueous solution of ammonium persulphate, other processing condition are identical with embodiment 3.
。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the quenching method of No. 50 steel, it is characterized in that, step comprises: No. 50 steel workpieces are after 830 ~ 870 DEG C of insulations, and temperature of being quenched by No. 50 steel workpieces is in the mixed aqueous solution of the Sodium Fluoride of-15 DEG C ~-10 DEG C and ammonium persulphate, keeps taking-up after 30 ~ 45 minutes;
In the mixed aqueous solution of described Sodium Fluoride and ammonium persulphate, the concentration of Sodium Fluoride is 1 ~ 2wt%, and the concentration of ammonium persulphate is 1 ~ 1.5wt%.
2. quenching method according to claim 1, is characterized in that, described No. 50 steel workpieces are at 830 ~ 870 DEG C of insulation 20 ~ 40min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441154.XA CN103484613B (en) | 2013-09-26 | 2013-09-26 | Quenching method for steel NO. 50 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441154.XA CN103484613B (en) | 2013-09-26 | 2013-09-26 | Quenching method for steel NO. 50 |
Publications (2)
| Publication Number | Publication Date |
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| CN103484613A CN103484613A (en) | 2014-01-01 |
| CN103484613B true CN103484613B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310441154.XA Active CN103484613B (en) | 2013-09-26 | 2013-09-26 | Quenching method for steel NO. 50 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940001140B1 (en) * | 1991-11-27 | 1994-02-14 | 한국종합기계 주식회사 | Heat treatment method of bearing |
| CN1053224C (en) * | 1997-02-28 | 2000-06-07 | 刘祥清 | Quenching agent for steel wire |
| CN101053936A (en) * | 2006-04-14 | 2007-10-17 | 沈大东 | Medium-carbon micro titanium alloy steel tooth cover and its producing technology method |
| CN101560591B (en) * | 2009-05-21 | 2013-07-31 | 上海市机械制造工艺研究所有限公司 | Composite temperature cold treatment process |
| CN102345002A (en) * | 2011-09-28 | 2012-02-08 | 芜湖三联锻造有限公司 | Quenching method of medium carbon steel |
| CN102747199A (en) * | 2012-07-16 | 2012-10-24 | 鑫光热处理工业(昆山)有限公司 | Continuous isothermal quenching method for C50E4 steel workpieces |
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Effective date of registration: 20161226 Address after: The shuttle village of Fangcheng District Nasuo town Fangchenggang city the Guangxi Zhuang Autonomous Region 538000 to the group Patentee after: Fangchenggang Fangcheng District Nasuo Perfume Factory Address before: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan Spring Road No. 588 Patentee before: Wuxi Yanggong Machinery Manufacturing Co., Ltd. |
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Effective date of registration: 20170911 Address after: South glass and economic and Technological Development Zone of Haian County in Jiangsu province Nantong City No. 10 226601 Patentee after: Jiangsu Fawkes Machinery Group Co., Ltd. Address before: The shuttle village of Fangcheng District Nasuo town Fangchenggang city the Guangxi Zhuang Autonomous Region 538000 to the group Patentee before: Fangchenggang Fangcheng District Nasuo Perfume Factory |