The heat treatment method of die steel is closely related to the arrangement of processing procedures. During mold manufacturing, the heat treatment method shall be selected according to the material and processing process route, and the corresponding heat treatment process shall be formulated.

（1）一般冷作模具钢工作零件的热处理工序安排：筹造――退火――机械加工成型――淬火与回火―工修整。

(1) Heat treatment process arrangement of general cold working die steel working parts: preparation - annealing - machining forming - quenching and tempering - finishing.

（2）冷作模具钢采用成型磨削及电加工工艺：锻造――退火――机械粗加工――淬火或回火――精加工（磨削、电加工）。

(2) Cold working die steel adopts forming grinding and electric machining process: forging - annealing - mechanical rough machining - quenching or tempering - finish machining (grinding and electric machining).

（3）冷作模具钢复杂冲模的加工：锻造――退火――机械粗加工――高温回火或调质――机械加工成型――淬火与回火――磨削与电工加工成型。

(3) Processing of complex die of cold working die steel: forging annealing mechanical rough machining high temperature tempering or quenching and tempering machining forming quenching and tempering grinding and electrical machining forming.

大多数冷作模具钢使用状态为淬火与回火，模具硬度通常为60hrc，为了进一步提高模具表面硬度、耐磨性和使用寿命，常进行表面强化处理，如渗碳、渗氮、渗硼氮碳共渗、td法渗钒铌、化学气相村积（cvd）等作为终热处理。

Most cold working die steels are quenched and tempered, and the die hardness is usually 60HRC. In order to further improve the die surface hardness, wear resistance and service life, surface strengthening treatment is often carried out, such as carburizing, nitriding, boronizing, nitrocarburizing, TD vanadium and niobium, chemical vapor deposition (CVD) and so on.

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