JPS55115922A - Production of high tensile steel of over 50kg/mm2 class of superior weldability - Google Patents
Production of high tensile steel of over 50kg/mm2 class of superior weldabilityInfo
- Publication number
- JPS55115922A JPS55115922A JP2313979A JP2313979A JPS55115922A JP S55115922 A JPS55115922 A JP S55115922A JP 2313979 A JP2313979 A JP 2313979A JP 2313979 A JP2313979 A JP 2313979A JP S55115922 A JPS55115922 A JP S55115922A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- class
- high tensile
- weldability
- over
- 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
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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To produce the high tensile steel of over 50kg/mm<2> class of superior weldability by quenching the steel plate, which has been improved of its weldability through the reduction in the addition amount of strength-intensifying-alloy components and the reduction of carbon equivalent, right after rolling thereby compensating the decrease in strength owing to the decrease in the alloy components. CONSTITUTION:The steel which contains C; 0.03-0.09%, Si; 0.05-0.40%, Mn; 0.07-1.80%, Al<0.10% and further, if necessary, contains one or two or more kinds of Cu<0.50%, Ni<0.50%, Cr<0.30%, Mo<0.30%, V<0.10%, Ti<0.10% and whose carbon equivalent expressed by formula I is 0.32 or less. After this steel is hot rolled, it is immediately quenched from the temperature above 770 deg.C down to the temperature below 600 deg.C. At this time, the mean cooling rate between 770- 600 deg.C is made rapid cooling of more than (28Mn%-17) deg.C/sec. This yields the high tensile structural steel of not less than 50kg/mm<2> class of superior weldability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2313979A JPS55115922A (en) | 1979-02-27 | 1979-02-27 | Production of high tensile steel of over 50kg/mm2 class of superior weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2313979A JPS55115922A (en) | 1979-02-27 | 1979-02-27 | Production of high tensile steel of over 50kg/mm2 class of superior weldability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55115922A true JPS55115922A (en) | 1980-09-06 |
Family
ID=12102213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2313979A Pending JPS55115922A (en) | 1979-02-27 | 1979-02-27 | Production of high tensile steel of over 50kg/mm2 class of superior weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55115922A (en) |
-
1979
- 1979-02-27 JP JP2313979A patent/JPS55115922A/en active Pending
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