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1)  Steel for Oil Well Tubing
油井管用钢
2)  C90 tubular steel
油井管钢
3)  Oil well steel tube
油井钢管
4)  N80 OCTG-purpose steel
N80油井管钢
1.
The analytical result shows that the typical structures of the domestically-used non-quenched and tempered N80 OCTG-purpose steel are P+F and B+P+F.
通过对非调质N80油井管钢的金相组织研究,分析了该钢典型组织缺陷的产生原因及其对力学性能的影响。
5)  tubular billet for oil well pipe
油井管坯钢
1.
The high quality 37Mn5 tubular billet for oil well pipe has been developed and produced in Laigang by the following short flow process: UHP EAF smelting-LF refining-continuous casting – hot charging – rolling,in which some process measures such as prepared burden,strengthening deoxidation,protective casting and so on have been adopted.
莱钢采用UHP电炉冶炼-LF精炼-连铸-热送-轧制短流程工艺路线开发生产J55级37Mn5油井管坯钢,采取了精料、精炼强化脱氧、连铸保护浇注等工艺措施,使生产出的产品成分均匀、残余元素含量低、氧含量低、夹杂物少、晶粒细小,满足了石油工业对高质量油井管的要求。
6)  37Mn5 oil well steell tube
37Mn5油井管钢
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