JPS5741354A - Superhigh strength steel - Google Patents
Superhigh strength steelInfo
- Publication number
- JPS5741354A JPS5741354A JP11698380A JP11698380A JPS5741354A JP S5741354 A JPS5741354 A JP S5741354A JP 11698380 A JP11698380 A JP 11698380A JP 11698380 A JP11698380 A JP 11698380A JP S5741354 A JPS5741354 A JP S5741354A
- Authority
- JP
- Japan
- Prior art keywords
- ductility
- toughness
- amount
- remelting
- inclusions
- 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
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE: To provide sufficient toughness and ductility as well as high strength to a steel by adjusting the S content to a very small amount to reduce the amount of unfavorable inclusions and by adding Ca to form a spheroidal composite inclusion of oxide and sulfide.
CONSTITUTION: This superhigh strength steel consists of, by wt., 0.25W0.55% C, 0.15W3.00% Si, 0.35W1.00% Mn, ≤0.005% S, 0.60W1.20% Cr, 0.15W1.20% Mo, 0.001W0.01% Ca and the balance Fe with inevitable impurities. When the S content exceeds the upper limit, no sufficient effect is produced by Ca for improving the toughness and ductility. Ca forms oxysulfide, the oxysulfide floats and separates during casting and remelting preferably in a vacuum, and the residual inclusion is spheroidized after the remelting. Below the lower limit of Ca produces no effect, and above the upper limit of Ca increases the amount of inclusions and deteriorates the toughness and ductility. To said basic components may be suitably added one or more among Ni, B, Ti, Nb and V.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11698380A JPS5741354A (en) | 1980-08-27 | 1980-08-27 | Superhigh strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11698380A JPS5741354A (en) | 1980-08-27 | 1980-08-27 | Superhigh strength steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5741354A true JPS5741354A (en) | 1982-03-08 |
Family
ID=14700579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11698380A Pending JPS5741354A (en) | 1980-08-27 | 1980-08-27 | Superhigh strength steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5741354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59177317A (en) * | 1983-03-29 | 1984-10-08 | Daido Steel Co Ltd | Manufacture of supertough steel |
| US7074283B2 (en) * | 2002-03-29 | 2006-07-11 | Sumitomo Metal Industries, Ltd. | Low alloy steel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52101624A (en) * | 1976-02-23 | 1977-08-25 | Nippon Steel Corp | Rail whose tumbling fatigue life is prolonged |
| JPS52127426A (en) * | 1976-04-19 | 1977-10-26 | Daido Steel Co Ltd | Precipitation haredning hot working tool steel |
| JPS52135819A (en) * | 1976-05-10 | 1977-11-14 | Daido Steel Co Ltd | Gear |
| JPS5354118A (en) * | 1976-10-28 | 1978-05-17 | Nippon Steel Corp | Production of high tensile steel sheet with excellent brittleness crackpropagation stopping properties |
| JPS5375114A (en) * | 1976-12-17 | 1978-07-04 | Nippon Steel Corp | Manufacture of structural steel |
| JPS5389815A (en) * | 1977-01-17 | 1978-08-08 | Sumitomo Metal Ind Ltd | Steel bar for low temperature |
| JPS55107727A (en) * | 1979-02-15 | 1980-08-19 | Nippon Steel Corp | Production of tough bar steel material of less anisotropy |
| JPS5658952A (en) * | 1979-10-17 | 1981-05-22 | Nippon Steel Corp | Low alloy steel with superior temper brittleness resistance |
-
1980
- 1980-08-27 JP JP11698380A patent/JPS5741354A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52101624A (en) * | 1976-02-23 | 1977-08-25 | Nippon Steel Corp | Rail whose tumbling fatigue life is prolonged |
| JPS52127426A (en) * | 1976-04-19 | 1977-10-26 | Daido Steel Co Ltd | Precipitation haredning hot working tool steel |
| JPS52135819A (en) * | 1976-05-10 | 1977-11-14 | Daido Steel Co Ltd | Gear |
| JPS5354118A (en) * | 1976-10-28 | 1978-05-17 | Nippon Steel Corp | Production of high tensile steel sheet with excellent brittleness crackpropagation stopping properties |
| JPS5375114A (en) * | 1976-12-17 | 1978-07-04 | Nippon Steel Corp | Manufacture of structural steel |
| JPS5389815A (en) * | 1977-01-17 | 1978-08-08 | Sumitomo Metal Ind Ltd | Steel bar for low temperature |
| JPS55107727A (en) * | 1979-02-15 | 1980-08-19 | Nippon Steel Corp | Production of tough bar steel material of less anisotropy |
| JPS5658952A (en) * | 1979-10-17 | 1981-05-22 | Nippon Steel Corp | Low alloy steel with superior temper brittleness resistance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59177317A (en) * | 1983-03-29 | 1984-10-08 | Daido Steel Co Ltd | Manufacture of supertough steel |
| JPH0454724B2 (en) * | 1983-03-29 | 1992-09-01 | Daido Steel Co Ltd | |
| US7074283B2 (en) * | 2002-03-29 | 2006-07-11 | Sumitomo Metal Industries, Ltd. | Low alloy steel |
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