| 发明名称 |
High-temperature steel for boiler making |
| 摘要 |
A high-temperature steel for boiler making having improved creep strength and low tendency to hardening in welded condition, having the following melt analysis (wt. %): C 0.050 to 0.100% Si 0.15 to 0.45% Mn 0.30 to 0.70% P </=0.020% S </=0.010% Al </=0.020% Cr 2.20 to 2.60% Mo 0.90 to 1.10% V 0.20 to 0.30% Ti 0.05 to 0.10% B 0.0015 to 0.0070% N </=0.01% The balance of the steel is comprised of iron and ordinary impurities. The steel is annealed for a period of about 30 to about 60 minutes at about 980 DEG C. to about 1040 DEG C., thereupon cooled in air, and then tempered for at least one hour at about 730 DEG C. to about 760 DEG C.
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| 申请公布号 |
US5573605(A) |
申请公布日期 |
1996.11.12 |
| 申请号 |
US19950399857 |
申请日期 |
1995.03.07 |
| 申请人 |
MANNESMANN AKTIENGESELLSCHAFT |
发明人 |
BENDICK, WALTER;HAARMANN, KLAUS;VON HAGEN, INGO |
| 分类号 |
C22C38/22;C22C38/24;C22C38/28;C22C38/32;(IPC1-7):C22C38/22 |
主分类号 |
C22C38/22 |
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