发明名称 |
Method of producing steel pipe material for oil well |
摘要 |
The method of producing steel pipe material for an oil well is characterized in that, as for the chemical composition of steel, B contained steel is adopted avoiding the addition of Ti which increases the values of non-metallic inclusions to decrease machinability, the value of N is limited to not more than 0.003% to be decreased in content of nitrides, coarse crystal grains due to the decreased content of N are prevented through austenizing of steel under rapid heating, so that such a steel pipe material for an oil well can be obtained that which has resistance to sulfide stress corrosion in addition to satisfactory strength and machinability.
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申请公布号 |
US4282047(A) |
申请公布日期 |
1981.08.04 |
申请号 |
US19790070905 |
申请日期 |
1979.08.29 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
YAMAGATA, MITSUKUNI;TAKITANI, KEIICHIRO;HASUNO, SADAO;MOTODA, KUNIAKI |
分类号 |
C21D9/14;(IPC1-7):C21D1/18 |
主分类号 |
C21D9/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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