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本文介绍了27M_nM_oVB钢的基本性能和地质钻管的试制工艺要点及其钻进使用情况。并着重介绍了该钢冷拔过程中间软化处理工艺。
This paper introduces the basic performance of 27M_nM_oVB steel and the key points of the trial production of geological drilling pipe and its drilling use. The process of middle softening of the steel during cold drawing is also introduced emphatically.