首页>
外国专利>
Oil country tubular goods excellent in collapse characteristics after expansion and method of production thereof
Oil country tubular goods excellent in collapse characteristics after expansion and method of production thereof
展开▼
机译:膨胀后的塌陷特性优异的油井管状产品及其生产方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present invention provides a method of production of oil country tubular goods having a small drop in collapse pressure after expansion and having a collapse pressure recovering by low temperature ageing at about 100° C. and oil country tubular goods obtained by this method of production.;This method of production comprises hot rolling a steel slab having amounts of addition of C, Mn, P, S, Nb, Ti, Al, and N in specific ranges and having a balance of iron and unavoidable impurities and shaping the steel strip coiled at a temperature of not more than 300° C. as it is into a tube. Alternatively, it comprises heating steel pipe having amounts of addition of C, Mn, P, S, Nb, Ti, Al, and N in specific ranges and having a balance of iron and unavoidable impurities to a temperature of the Ac3 [° C.] to 1150° C., then cooling it in a range of 400 to 800° C. at a rate of 5 to 50° C./second.
展开▼