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此文主要讨论了焊前预热、焊后冷却方式、焊后热处理工艺对１２Ｃｒ１ＭｏＶ钢焊缝组织和硬度的影响，并用表差法和联立方程式法确定了该钢焊缝硬度变化率与热处理温度的关系。
This paper mainly discusses the influence of preheating, post-weld cooling and post-weld heat treatment on the microstructure and hardness of 12Cr1MoV steel. The variation of hardness and heat treatment of the weld are determined by surface difference method and simultaneous equations The relationship between temperature.