JPS5655552A - 12% chromium-nickel alloy steel - Google Patents
12% chromium-nickel alloy steelInfo
- Publication number
- JPS5655552A JPS5655552A JP13131579A JP13131579A JPS5655552A JP S5655552 A JPS5655552 A JP S5655552A JP 13131579 A JP13131579 A JP 13131579A JP 13131579 A JP13131579 A JP 13131579A JP S5655552 A JPS5655552 A JP S5655552A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- alloy steel
- toughness
- tensile strength
- chromium
- 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
Abstract
PURPOSE: To enhance the tensile strength and toughness of a 12Cr-Ni steel for the rotor of a steam turbine of large capacity by adding a specifically minute amount of Nb or Ta to the steel.
CONSTITUTION: This alloy steel contains 0.05W0.30% C, 0.2W1.5% Mn,<0.2% Si, 8W13% Cr, 0.2W1.5% Mo, 0.05W0.3% V, 3.0W4.0% Ni and 0.01W0.05% Nb and/or Ta. The Ni content of a 12Cr-Ni steel is adjusted to 3W4% to improve the tensile strength and toughness, and by adding Nb and/or Ta, the crystal grains are refined to further enhance the toughness. A rotor made of this steel is heat treated while adjusting the cooling rate of hardening to 2°C/min and that of tempering to 20°C/hr. This alloy steel is remarkably superior to a conventional 12Cr-Ni alloy steel in tensile strength and toughness.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13131579A JPS5655552A (en) | 1979-10-13 | 1979-10-13 | 12% chromium-nickel alloy steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13131579A JPS5655552A (en) | 1979-10-13 | 1979-10-13 | 12% chromium-nickel alloy steel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5655552A true JPS5655552A (en) | 1981-05-16 |
JPS62993B2 JPS62993B2 (en) | 1987-01-10 |
Family
ID=15055074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13131579A Granted JPS5655552A (en) | 1979-10-13 | 1979-10-13 | 12% chromium-nickel alloy steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5655552A (en) |
-
1979
- 1979-10-13 JP JP13131579A patent/JPS5655552A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62993B2 (en) | 1987-01-10 |
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