以DC53钢、Cr8Mo2SiV钢、Calmax钢等3种典型的冷作模具钢为研究对象，对比了其在典型热处理工艺处理后的残余奥氏体含量与分布、冲击韧性、尺寸稳定性，并总结出了残余奥氏体对后两者的影响规律。结果表明：DC53钢和Cr8Mo2SiV钢的残余奥氏体含量远高于Calmax钢的，400 ℃低温回火处理会大幅提升残余奥氏体含量；典型热处理后冷作模具钢的冲击韧性与残余奥氏体含量成正比，与回火温度成反比。DC53钢和Cr8Mo2SiV钢的尺寸变化均遵循直线上升的规律，但Calmax钢的的尺寸变化规律不明显。

Taking three typical cold working die steels (DC53 steel, Cr8Mo2SiV steel, Calmax steel) as research objects, the content and distribution of residual austenite, impact toughness and dimensional stability after typical heat treatment process were compared, and the influence of residual austenite on the latter two was summarized. The results show that both the residual austenite content of DC53 steel and Cr8Mo2SiV steel were much higher than that of Calmax steel, and the content of residual austenite can be greatly increased by low temperature tempering at 400 ℃. The impact toughness of the cold work die steel after typical heat treatment was directly proportional to the content of residual austenite and inversely proportional to the tempering temperature. Both the size changes of DC53 steel and Cr8Mo2SiV steel followed the law of linear rising, while the size change of Calmax steel was not obvious.