JPS57149421A - Manufacture of surface decarburized steel excellent in resistance to stress corrosion cracking by sulfide and ammonium - Google Patents
Manufacture of surface decarburized steel excellent in resistance to stress corrosion cracking by sulfide and ammoniumInfo
- Publication number
- JPS57149421A JPS57149421A JP3312681A JP3312681A JPS57149421A JP S57149421 A JPS57149421 A JP S57149421A JP 3312681 A JP3312681 A JP 3312681A JP 3312681 A JP3312681 A JP 3312681A JP S57149421 A JPS57149421 A JP S57149421A
- Authority
- JP
- Japan
- Prior art keywords
- steel slab
- manufacture
- stress corrosion
- controlled
- steel
- 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 manufacture a surface decarburized steel at low cost by a method in which oxygen concentration and dew point in the atmosphere of heating furnace are controlled and also steel slab stayed in the furnace for a specific period of time in the heating of the steel slab prior to hot rolling.
CONSTITUTION: In the heating of a steel slab prior to hot rolling, the concentration of oxygen in the atmosphere is controlled to 0.1W3%, and also dew point is controlled to ≤25°C. Also, the residence time of the steel slab in the furnace is regulated to the period to the period of time, represented by the formula I(where x is draft). Under the condition, steel slab is heated for subjecting its surface to a decarburizing treatment, and a surface-decarburized steel having excellent sulfide-caused stress corrosion cracking resistance can be obtained. Also, if the treatment is combined with a surface softening treatment, its ammonia-caused cracking characteristic can be raised.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3312681A JPS57149421A (en) | 1981-03-10 | 1981-03-10 | Manufacture of surface decarburized steel excellent in resistance to stress corrosion cracking by sulfide and ammonium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3312681A JPS57149421A (en) | 1981-03-10 | 1981-03-10 | Manufacture of surface decarburized steel excellent in resistance to stress corrosion cracking by sulfide and ammonium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57149421A true JPS57149421A (en) | 1982-09-16 |
Family
ID=12377921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3312681A Pending JPS57149421A (en) | 1981-03-10 | 1981-03-10 | Manufacture of surface decarburized steel excellent in resistance to stress corrosion cracking by sulfide and ammonium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57149421A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61279631A (en) * | 1985-06-03 | 1986-12-10 | Kobe Steel Ltd | Manufacture of tempered 60kgf/mm2 class high tension steel plate superior in sulfide and ammonia stress corrosion cracking resistance |
| JP2008116224A (en) * | 2006-11-01 | 2008-05-22 | A & D Co Ltd | Electronic weighing instrument |
| JP2008116223A (en) * | 2006-11-01 | 2008-05-22 | A & D Co Ltd | Electronic weighing instrument |
| WO2021100336A1 (en) * | 2019-11-22 | 2021-05-27 | Ｊｆｅスチール株式会社 | Steel material for liquid ammonia transport and storage, and manufacturing method for steel material for liquid ammonia transport and storage |
-
1981
- 1981-03-10 JP JP3312681A patent/JPS57149421A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61279631A (en) * | 1985-06-03 | 1986-12-10 | Kobe Steel Ltd | Manufacture of tempered 60kgf/mm2 class high tension steel plate superior in sulfide and ammonia stress corrosion cracking resistance |
| JP2008116224A (en) * | 2006-11-01 | 2008-05-22 | A & D Co Ltd | Electronic weighing instrument |
| JP2008116223A (en) * | 2006-11-01 | 2008-05-22 | A & D Co Ltd | Electronic weighing instrument |
| WO2021100336A1 (en) * | 2019-11-22 | 2021-05-27 | Ｊｆｅスチール株式会社 | Steel material for liquid ammonia transport and storage, and manufacturing method for steel material for liquid ammonia transport and storage |
| JPWO2021100336A1 (en) * | 2019-11-22 | 2021-05-27 |
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