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通过对９Ｃｒ－１Ｍｏ钢模拟粗晶区回火后性能的研究，确定了该钢合适的焊后回火参数Ｐ值的范围，并通过实际焊接证明，其所确定的回火参数Ｐ值能满足接头性能的要求
Through the study on the performance of 9Cr-1Mo steel simulated after tempering in the coarse grain region, the appropriate range of P value of the post-weld tempering parameter of the steel was determined. The P value of the tempering parameter determined by the actual welding proves that Connector performance requirements