JPS6473021A - Production of fine grain steel - Google Patents
Production of fine grain steelInfo
- Publication number
- JPS6473021A JPS6473021A JP22889187A JP22889187A JPS6473021A JP S6473021 A JPS6473021 A JP S6473021A JP 22889187 A JP22889187 A JP 22889187A JP 22889187 A JP22889187 A JP 22889187A JP S6473021 A JPS6473021 A JP S6473021A
- Authority
- JP
- Japan
- Prior art keywords
- finish rolling
- steel
- fine
- billet
- production
- 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 produce a steel bar having a fine ferrite/pearlite structure uniform over the section by cooling the billet of a low-and middle-carbon low-alloy steel having a specific compsn. down to a specific range prior to finish rolling and specifying the end temp. of the finish rolling. CONSTITUTION:The billet consisting, by weight %, 0.10-0.60% C, 0.10-0.35% Si, 0.30-1.80% Mn, 0.010-0.045% Al, and the balance Fe and inevitable impurities is heated to 750-950 deg.C and is hot rolled. The billet is cooled from 850-1,000 deg.C down to the temp. below 850 deg.C and higher than the M3 point prior to the finish rolling at this time. The end temp. of the finish rolling is specified to 700-850 deg.C. 0.015-0.100% Nb is incorporated at need into this steel compsn. and further, >=1 kinds among <=1.5% Cr, <=0.3% Mo, and 0.050-0.300% V are incorporated therein. The fine-grained steel having the ferrite/pearlite structure which is uniform and fine in both the front layer part and the inside is thereby obtd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22889187A JPS6473021A (en) | 1987-09-11 | 1987-09-11 | Production of fine grain steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22889187A JPS6473021A (en) | 1987-09-11 | 1987-09-11 | Production of fine grain steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473021A true JPS6473021A (en) | 1989-03-17 |
Family
ID=16883472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22889187A Pending JPS6473021A (en) | 1987-09-11 | 1987-09-11 | Production of fine grain steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473021A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011092985A (en) * | 2009-10-30 | 2011-05-12 | Jfe Steel Corp | Bar steel rolling method |
| CN103205628A (en) * | 2013-04-26 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Production method of HRB400 (Rockwell Hardness) deformed steel bar |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121220A (en) * | 1983-12-02 | 1985-06-28 | Kobe Steel Ltd | Production of hot rolled steel wire rod and bar having excellent cold forgeability |
| JPS61153230A (en) * | 1984-12-26 | 1986-07-11 | Kawasaki Steel Corp | Production of low-alloy steel wire rod which permits quick spheroidization |
| JPS6250411A (en) * | 1985-08-30 | 1987-03-05 | Kobe Steel Ltd | Production of rolled steel material having excellent homogeneity |
-
1987
- 1987-09-11 JP JP22889187A patent/JPS6473021A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121220A (en) * | 1983-12-02 | 1985-06-28 | Kobe Steel Ltd | Production of hot rolled steel wire rod and bar having excellent cold forgeability |
| JPS61153230A (en) * | 1984-12-26 | 1986-07-11 | Kawasaki Steel Corp | Production of low-alloy steel wire rod which permits quick spheroidization |
| JPS6250411A (en) * | 1985-08-30 | 1987-03-05 | Kobe Steel Ltd | Production of rolled steel material having excellent homogeneity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011092985A (en) * | 2009-10-30 | 2011-05-12 | Jfe Steel Corp | Bar steel rolling method |
| CN103205628A (en) * | 2013-04-26 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Production method of HRB400 (Rockwell Hardness) deformed steel bar |
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