JPS5565324A - Manufacture of low alloy steel excellent in cold workability - Google Patents
Manufacture of low alloy steel excellent in cold workabilityInfo
- Publication number
- JPS5565324A JPS5565324A JP13720178A JP13720178A JPS5565324A JP S5565324 A JPS5565324 A JP S5565324A JP 13720178 A JP13720178 A JP 13720178A JP 13720178 A JP13720178 A JP 13720178A JP S5565324 A JPS5565324 A JP S5565324A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- low alloy
- hot rolled
- alloy steel
- cold workability
- 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 Steel (AREA)
Abstract
PURPOSE: To give to a steel bar as it is hot rolled excellent mechanical properties and cold workability equal to those of the steel material normalized after hot rolling, by subjecting the steel bar of low alloy steel to a specific heat treatment.
CONSTITUTION: A low alloy steel of medium or low carbon comprising 0.13W 0.25% C, 0.30W1.80% Mn, <1.50% Cr, <0.30% Mo, <0.025% S, <0.025% P, <0.10% sol. Al, or further contg. <0.10% V and/or <0.05% Nb. The steel material is soaked at a temp. 950W1,200°C, then it is hot rolled at a draft 15, and is finished at a temp. 800W950°C. The structure of the steel as it is hot rolled is composed of pro-eutectoid ferrite and a fine granular ferrite-pearlite structure. Control of the cooling rate after hot rolling at 0.3W3.0°C/sec. prevents the increase in bainite structure. The steel has excellent yield ratio, ductility, toughness equal to, or more than, those of a normalized low alloy, without being subjected to normalizing.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13720178A JPS5565324A (en) | 1978-11-07 | 1978-11-07 | Manufacture of low alloy steel excellent in cold workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13720178A JPS5565324A (en) | 1978-11-07 | 1978-11-07 | Manufacture of low alloy steel excellent in cold workability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5565324A true JPS5565324A (en) | 1980-05-16 |
| JPS6137334B2 JPS6137334B2 (en) | 1986-08-23 |
Family
ID=15193146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13720178A Granted JPS5565324A (en) | 1978-11-07 | 1978-11-07 | Manufacture of low alloy steel excellent in cold workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5565324A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735623A (en) * | 1980-08-08 | 1982-02-26 | Sumitomo Metal Ind Ltd | Manufacture of high strength alloy steel for high temperature use |
| JPS5773123A (en) * | 1980-10-22 | 1982-05-07 | Sumitomo Metal Ind Ltd | Producton of low alloy steel of superior cold workability |
| JPS5789429A (en) * | 1980-11-20 | 1982-06-03 | Sumitomo Metal Ind Ltd | Production of low-alloy steel with excellent workability in cold drawing and cold extrusion |
| JPS5858235A (en) * | 1981-09-30 | 1983-04-06 | Kawasaki Steel Corp | Heat treatment for direct softening of steel wire and steel bar for structure |
| JPS59100216A (en) * | 1982-11-29 | 1984-06-09 | Kawasaki Steel Corp | Manufacture of structural alloy steel for cold forging and for cutting |
| JPS60152624A (en) * | 1984-01-23 | 1985-08-10 | Daido Steel Co Ltd | Manufacture of machine structural parts |
| JPH03253514A (en) * | 1990-03-02 | 1991-11-12 | Nippon Steel Corp | Production of high-strength alloy steel having excellent cold workability |
| US20180251876A1 (en) * | 2015-08-25 | 2018-09-06 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Mechanical structure steel for cold-working and manufacturing method therefor |
| CN110184526A (en) * | 2018-04-26 | 2019-08-30 | 江阴兴澄特种钢铁有限公司 | The normalizing type low yield strength ratio bridge steel plate and its manufacturing method of a kind of yield strength 370MPa and following grade of steel |
-
1978
- 1978-11-07 JP JP13720178A patent/JPS5565324A/en active Granted
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735623A (en) * | 1980-08-08 | 1982-02-26 | Sumitomo Metal Ind Ltd | Manufacture of high strength alloy steel for high temperature use |
| JPS5773123A (en) * | 1980-10-22 | 1982-05-07 | Sumitomo Metal Ind Ltd | Producton of low alloy steel of superior cold workability |
| JPH0112815B2 (en) * | 1980-10-22 | 1989-03-02 | Sumitomo Metal Ind | |
| JPS5789429A (en) * | 1980-11-20 | 1982-06-03 | Sumitomo Metal Ind Ltd | Production of low-alloy steel with excellent workability in cold drawing and cold extrusion |
| JPS5939483B2 (en) * | 1980-11-20 | 1984-09-25 | 住友金属工業株式会社 | Manufacturing method of low alloy steel with excellent cold drawing and cold extrusion processability |
| JPH0213004B2 (en) * | 1981-09-30 | 1990-04-03 | Kawasaki Steel Co | |
| JPS5858235A (en) * | 1981-09-30 | 1983-04-06 | Kawasaki Steel Corp | Heat treatment for direct softening of steel wire and steel bar for structure |
| JPS59100216A (en) * | 1982-11-29 | 1984-06-09 | Kawasaki Steel Corp | Manufacture of structural alloy steel for cold forging and for cutting |
| JPS60152624A (en) * | 1984-01-23 | 1985-08-10 | Daido Steel Co Ltd | Manufacture of machine structural parts |
| JPH0563524B2 (en) * | 1984-01-23 | 1993-09-10 | Daido Steel Co Ltd | |
| JPH03253514A (en) * | 1990-03-02 | 1991-11-12 | Nippon Steel Corp | Production of high-strength alloy steel having excellent cold workability |
| US20180251876A1 (en) * | 2015-08-25 | 2018-09-06 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Mechanical structure steel for cold-working and manufacturing method therefor |
| CN110184526A (en) * | 2018-04-26 | 2019-08-30 | 江阴兴澄特种钢铁有限公司 | The normalizing type low yield strength ratio bridge steel plate and its manufacturing method of a kind of yield strength 370MPa and following grade of steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6137334B2 (en) | 1986-08-23 |
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