JPS5457418A - Manufacture of high toughness, refined steel - Google Patents
Manufacture of high toughness, refined steelInfo
- Publication number
- JPS5457418A JPS5457418A JP12404177A JP12404177A JPS5457418A JP S5457418 A JPS5457418 A JP S5457418A JP 12404177 A JP12404177 A JP 12404177A JP 12404177 A JP12404177 A JP 12404177A JP S5457418 A JPS5457418 A JP S5457418A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- contg
- point
- refined
- zone
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To obtain a high toughness, refined steel with superior low temp. toughness by hot rolling a billet of a specific compsn. contg. C, Si, Mn and N as basic components in the recrystallization and unrecrystallized austenite zone, followed by rapid cooling and rolling in the ferrite zone below Ar1 transformation point. CONSTITUTION:A billet or ingot consisting of C; 0.01-0.20%, Si; 0.005-0.50%, Mn; 0.30-6.0%, N; 0.001-0.015% and the balance iron as basic components, contg. sol. Al; 0.001-0.015% or Nb, V or Ti; 0.005-0.10%, and optionally contg. Cu<=2%, Ni<=10%, Cr<=1%, Mo<=1%, etc. is heated to a temp. above 1000 deg.C to dissolve carbonitride well and hot rolled at a temp. of 1000-800 deg.C and a total reduction ratio more than 60% to let coarse austenite disappear. The hot rolled material is then rapidly cooled to a temp. below Ar1 point at a cooling rate over air cooling, rolled at a total reduction ratio more than 10% in the ferrite zone, heated to a temp. above Ac1 point, quench hardned, and tempered to give a refined, high tensile steel of super fine austenite grain size for low temp. use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12404177A JPS5457418A (en) | 1977-10-18 | 1977-10-18 | Manufacture of high toughness, refined steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12404177A JPS5457418A (en) | 1977-10-18 | 1977-10-18 | Manufacture of high toughness, refined steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5457418A true JPS5457418A (en) | 1979-05-09 |
| JPS571570B2 JPS571570B2 (en) | 1982-01-12 |
Family
ID=14875539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12404177A Granted JPS5457418A (en) | 1977-10-18 | 1977-10-18 | Manufacture of high toughness, refined steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5457418A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690921A (en) * | 1979-12-22 | 1981-07-23 | Kawasaki Steel Corp | Production of low temperature steel having superior toughness and hydrogen induced crack resistance characteristic |
| JPS5693852A (en) * | 1979-12-28 | 1981-07-29 | Nippon Steel Corp | Steel pipe for oil well with excellent compression strength |
| JPS5741323A (en) * | 1980-08-26 | 1982-03-08 | Kawasaki Steel Corp | Manufacture of refined thick steel products with superior characteristic stopping brittle rupture propagation |
| JPS58217629A (en) * | 1982-06-12 | 1983-12-17 | Kobe Steel Ltd | Preparation of low temperature steel for welding joint part excellent in toughness |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6137918A (en) * | 1984-07-30 | 1986-02-22 | Nippon Steel Corp | Manufacture of high strength steel having >=70kgf/mm2 tensile strength |
-
1977
- 1977-10-18 JP JP12404177A patent/JPS5457418A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690921A (en) * | 1979-12-22 | 1981-07-23 | Kawasaki Steel Corp | Production of low temperature steel having superior toughness and hydrogen induced crack resistance characteristic |
| JPS6334205B2 (en) * | 1979-12-22 | 1988-07-08 | Kawasaki Steel Co | |
| JPS5693852A (en) * | 1979-12-28 | 1981-07-29 | Nippon Steel Corp | Steel pipe for oil well with excellent compression strength |
| JPS5741323A (en) * | 1980-08-26 | 1982-03-08 | Kawasaki Steel Corp | Manufacture of refined thick steel products with superior characteristic stopping brittle rupture propagation |
| JPS58217629A (en) * | 1982-06-12 | 1983-12-17 | Kobe Steel Ltd | Preparation of low temperature steel for welding joint part excellent in toughness |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS571570B2 (en) | 1982-01-12 |
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