JPS56169723A - Treatment of reheating-omit type hot forging bar steel - Google Patents
Treatment of reheating-omit type hot forging bar steelInfo
- Publication number
- JPS56169723A JPS56169723A JP7108880A JP7108880A JPS56169723A JP S56169723 A JPS56169723 A JP S56169723A JP 7108880 A JP7108880 A JP 7108880A JP 7108880 A JP7108880 A JP 7108880A JP S56169723 A JPS56169723 A JP S56169723A
- Authority
- JP
- Japan
- Prior art keywords
- hot forging
- bar steel
- steel
- treatment
- reheating
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE: To raise the toughness and fatigue characteristic of structural bar steel subjected to only hot forging without reheat treatment by subjecting a steel containing specific amounts of C, Si, Mn, V, S, and Al and having a specific carbon equivalent to a hot forging and then to a specifically designated cooling process.
CONSTITUTION: A steel containing 0.30W0.60% C, 0.15W0.35% Si, 0.60W2.0% Mn, 0.03W0.20% V, 0.02W0.12% S, 0.005W0.05% Al, and Fe and having a carbon equivalent of 0.53% or more, as shown by the formula, is cast into ingots. The cast ingots are hot-forged into a desired bar steel and then cooled at a cooling rate of 0.7°C or less/sec in the temperature range of 1,000W500°C, during which V present in the steel composition separates out in the form of the carbo-nitride of V to cause strength to rise, and also combines with C and N in the matrix to lower the amounts of the adjoining C and N, thus permitting the next ferrite-transformation to be easily formed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55071088A JPS6045250B2 (en) | 1980-05-28 | 1980-05-28 | Manufacturing method for non-thermal forged parts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55071088A JPS6045250B2 (en) | 1980-05-28 | 1980-05-28 | Manufacturing method for non-thermal forged parts |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56169723A true JPS56169723A (en) | 1981-12-26 |
JPS6045250B2 JPS6045250B2 (en) | 1985-10-08 |
Family
ID=13450418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55071088A Expired JPS6045250B2 (en) | 1980-05-28 | 1980-05-28 | Manufacturing method for non-thermal forged parts |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6045250B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4478652A (en) * | 1982-07-09 | 1984-10-23 | Woodings Robert T | Class D sucker rods |
JPS59226114A (en) * | 1983-06-02 | 1984-12-19 | Caterpillar Mitsubishi Ltd | Production of high strength cast steel product used for mechine structure |
JP2007204798A (en) * | 2006-01-31 | 2007-08-16 | Jfe Steel Kk | Method for manufacturing parts excellent in hardening crack resistance |
WO2009057731A1 (en) | 2007-10-29 | 2009-05-07 | Nippon Steel Corporation | Martensitic non-heat-treated steel for hot forging and non-heat-treated steel hot forgings |
US7824508B2 (en) | 2006-07-28 | 2010-11-02 | Nippon Steel Corporation | Fine grain surface layer steel part and method of production of same |
CN104959498A (en) * | 2015-04-30 | 2015-10-07 | 南京迪威尔高端制造股份有限公司 | Forging raw material production mode selection method |
JP2016035093A (en) * | 2014-08-04 | 2016-03-17 | 新日鐵住金株式会社 | High strength hot-rolled steel sheet excellent in hole-expandability and method for manufacturing the same, and hole-expandability evaluation method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS626165U (en) * | 1985-06-28 | 1987-01-14 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54121225A (en) * | 1978-03-14 | 1979-09-20 | Sumitomo Metal Ind Ltd | Production of nonrefined forged steel products |
JPS582243A (en) * | 1981-06-23 | 1983-01-07 | Nippon Sheet Glass Co Ltd | Surface protective treatment of glass article |
JPS60248867A (en) * | 1984-09-17 | 1985-12-09 | Nippon Steel Corp | Chain having >=70kg/mm2 tensile strength and excellent toughness and its production |
-
1980
- 1980-05-28 JP JP55071088A patent/JPS6045250B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54121225A (en) * | 1978-03-14 | 1979-09-20 | Sumitomo Metal Ind Ltd | Production of nonrefined forged steel products |
JPS582243A (en) * | 1981-06-23 | 1983-01-07 | Nippon Sheet Glass Co Ltd | Surface protective treatment of glass article |
JPS60248867A (en) * | 1984-09-17 | 1985-12-09 | Nippon Steel Corp | Chain having >=70kg/mm2 tensile strength and excellent toughness and its production |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4478652A (en) * | 1982-07-09 | 1984-10-23 | Woodings Robert T | Class D sucker rods |
JPS59226114A (en) * | 1983-06-02 | 1984-12-19 | Caterpillar Mitsubishi Ltd | Production of high strength cast steel product used for mechine structure |
JPH0355539B2 (en) * | 1983-06-02 | 1991-08-23 | ||
JP2007204798A (en) * | 2006-01-31 | 2007-08-16 | Jfe Steel Kk | Method for manufacturing parts excellent in hardening crack resistance |
US7824508B2 (en) | 2006-07-28 | 2010-11-02 | Nippon Steel Corporation | Fine grain surface layer steel part and method of production of same |
WO2009057731A1 (en) | 2007-10-29 | 2009-05-07 | Nippon Steel Corporation | Martensitic non-heat-treated steel for hot forging and non-heat-treated steel hot forgings |
US9376738B2 (en) | 2007-10-29 | 2016-06-28 | Nippon Steel & Sumitomo Metal Corporation | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part |
US9487848B2 (en) | 2007-10-29 | 2016-11-08 | Nippon Steel & Sumitomo Metal Corporation | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part |
JP2016035093A (en) * | 2014-08-04 | 2016-03-17 | 新日鐵住金株式会社 | High strength hot-rolled steel sheet excellent in hole-expandability and method for manufacturing the same, and hole-expandability evaluation method |
CN104959498A (en) * | 2015-04-30 | 2015-10-07 | 南京迪威尔高端制造股份有限公司 | Forging raw material production mode selection method |
Also Published As
Publication number | Publication date |
---|---|
JPS6045250B2 (en) | 1985-10-08 |
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