JPS5582749A - Heat treatment omitting type high tensile steel bar for hot forging - Google Patents
Heat treatment omitting type high tensile steel bar for hot forgingInfo
- Publication number
- JPS5582749A JPS5582749A JP15496878A JP15496878A JPS5582749A JP S5582749 A JPS5582749 A JP S5582749A JP 15496878 A JP15496878 A JP 15496878A JP 15496878 A JP15496878 A JP 15496878A JP S5582749 A JPS5582749 A JP S5582749A
- Authority
- JP
- Japan
- Prior art keywords
- steel bar
- heat treatment
- steel
- toughness
- hot forging
- 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
PURPOSE: To enhance the toughness of a mechanical structural steel of a predetermined compsn. without deteriorating the strength as hot forged without carrying out heat treatment by raising the Mn content of the steel and adding a little V.
CONSTITUTION: Steel having a carbon equivalent (Ceq%=C%+1/7Si%+1/ 5Mn%+1/2V%) of 0.53% or more and contg. C 0.20W0.60%, Si 0.15W0.35%, Mn 1.0W2.0%, V 0.01W0.08%, Al 0.005W0.05% and S≤0.04% is refined and rolled into a steel bar. By this steel bar compsn. V carbonitride is completely dissolved at the heating temp. of hot forging, and square ferrite precipitates in the grains during cooling after the forging to enhance the toughness of the matrix. In case of a use esp. setting importance on machinability, S 0.04W0.12% may be added without deteriorating the strength and toughness of the steel bar as hot forged.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15496878A JPS5582749A (en) | 1978-12-18 | 1978-12-18 | Heat treatment omitting type high tensile steel bar for hot forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15496878A JPS5582749A (en) | 1978-12-18 | 1978-12-18 | Heat treatment omitting type high tensile steel bar for hot forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5582749A true JPS5582749A (en) | 1980-06-21 |
Family
ID=15595823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15496878A Pending JPS5582749A (en) | 1978-12-18 | 1978-12-18 | Heat treatment omitting type high tensile steel bar for hot forging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5582749A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830262U (en) * | 1981-08-25 | 1983-02-26 | 三菱電機株式会社 | circuit break |
| JPS6050148A (en) * | 1983-08-30 | 1985-03-19 | Aichi Steel Works Ltd | High toughness steel saving refining |
| US4806178A (en) * | 1984-07-04 | 1989-02-21 | Nippon Steel Corporation | Non-heat refined steel bar having improved toughness |
| 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 |
-
1978
- 1978-12-18 JP JP15496878A patent/JPS5582749A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830262U (en) * | 1981-08-25 | 1983-02-26 | 三菱電機株式会社 | circuit break |
| JPS6050148A (en) * | 1983-08-30 | 1985-03-19 | Aichi Steel Works Ltd | High toughness steel saving refining |
| JPH0351779B2 (en) * | 1983-08-30 | 1991-08-07 | Aichi Steel Works Ltd | |
| US4806178A (en) * | 1984-07-04 | 1989-02-21 | Nippon Steel Corporation | Non-heat refined steel bar having improved toughness |
| 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 |
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