JPS5585627A - Manufacture of nickel base normalized steel excellent in low temperature toughness - Google Patents
Manufacture of nickel base normalized steel excellent in low temperature toughnessInfo
- Publication number
- JPS5585627A JPS5585627A JP15817078A JP15817078A JPS5585627A JP S5585627 A JPS5585627 A JP S5585627A JP 15817078 A JP15817078 A JP 15817078A JP 15817078 A JP15817078 A JP 15817078A JP S5585627 A JPS5585627 A JP S5585627A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- steel
- manufacture
- low temperature
- soln
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
PURPOSE:To make the distribution of AlN in Ni base normalized steel even and fine to improve low-temp. toughness remarkably, by adjusting Al and N contents of the steel, by continuing heat treatment of the steel after it is cooled to a temp. not higher than that at which Al and N forms supersaturated solid soln. CONSTITUTION:A low-alloy steel composed of 0.05-0.30% C, 0.02-0.60% Si, 0.02-2.00% Mn, 0.02-2.50% Cr, 1.0-10.0% Ni, Mo>=(Ni+Cr+Mn)/50, or in addn., one or more members selected from the group consisting of Cu, V, Nb, Co, B. The steel contains 20-300ppm N, and 0.01-0.02 excess Al defined by sol. Al-2(N-0.3Ti). The slab is subjected to soln. treatment by heating it to a temp. not lower than that at which Al-N forms solid soln., then it is forged or rolled. It is cooled to a temp. 500-600 deg.C at which Al, N form supersaturated solid soln. Finally it is subjected to annealing, hardening, and tempering at a temp. not lower than 650-710 deg.C, i.e., high-temp. ferritic zone. Hereby low-temp. toughness of the steel is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15817078A JPS609568B2 (en) | 1978-12-23 | 1978-12-23 | Method for producing Ni-based tempered steel with excellent low-temperature toughness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15817078A JPS609568B2 (en) | 1978-12-23 | 1978-12-23 | Method for producing Ni-based tempered steel with excellent low-temperature toughness |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5585627A true JPS5585627A (en) | 1980-06-27 |
JPS609568B2 JPS609568B2 (en) | 1985-03-11 |
Family
ID=15665798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15817078A Expired JPS609568B2 (en) | 1978-12-23 | 1978-12-23 | Method for producing Ni-based tempered steel with excellent low-temperature toughness |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS609568B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110592470A (en) * | 2019-08-22 | 2019-12-20 | 江阴兴澄特种钢铁有限公司 | Large-thickness SA302GrC steel plate with low-temperature toughness and preparation method thereof |
CN113549746A (en) * | 2021-07-29 | 2021-10-26 | 江苏联峰能源装备有限公司 | Forging and heat treatment process of steel for 20MnMo tube plate |
-
1978
- 1978-12-23 JP JP15817078A patent/JPS609568B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110592470A (en) * | 2019-08-22 | 2019-12-20 | 江阴兴澄特种钢铁有限公司 | Large-thickness SA302GrC steel plate with low-temperature toughness and preparation method thereof |
CN113549746A (en) * | 2021-07-29 | 2021-10-26 | 江苏联峰能源装备有限公司 | Forging and heat treatment process of steel for 20MnMo tube plate |
Also Published As
Publication number | Publication date |
---|---|
JPS609568B2 (en) | 1985-03-11 |
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