Only through proper heat treatment process can the cold working die meet the performance requirements. The basic heat treatment processes commonly used in cold working dies include normalizing, annealing, quenching and tempering, quenching, tempering, carburizing, nitriding, etc.

(1)正火；改*模具毛坯料的各種組織缺陷，獲得利于切削加工的組織與硬度，改*組織，細化晶粒，為后續熱處理作好組織準備。

(1) Normalizing; Change the various structural defects of the die blank, obtain the structure and hardness conducive to cutting, change the structure, refine the grain, and prepare for the subsequent heat treatment.

(2)退火；冷作模具鋼常用的退火工藝主要有以下三種：完全退火、球化退火、去應力退火。

(2) Annealing; There are three common annealing processes for cold working die steel: complete annealing, spheroidizing annealing and stress relief annealing.

(3)調質；’對于形狀復雜、尺寸精度要求高的模具，以及模具表面需要進行強化處理（氮化）的模具，調質應安排在粗加工之后精加工之前，以減小模具淬火變形和降低精加工的表面粗糙度值。

(3) Conditioning; ' For the mold with complex shape and high dimensional accuracy requirements, as well as the mold whose surface needs strengthening treatment (nitriding), the quenching and tempering shall be arranged after rough machining and before finish machining, so as to reduce the quenching deformation of the mold and reduce the surface roughness value of finish machining.

(4)淬火；使模具獲得所需的使用性能。淬火是模具制造過程中很重要的一個工序。

(4) Quenching; Make the mold obtain the required performance. Quenching is a very important process in die manufacturing.

(5)回火；冷作模具淬火后都應盡快進行回火，以免在淬火應力的作用下造成開裂的危險。

(5) Tempering; The cold working die should be tempered as soon as possible after quenching to avoid the risk of cracking under the action of quenching stress.

(6)滲碳；在模具制造中滲碳常用于導柱、導套等零件。

(6) Carburizing; Carburizing is often used for parts such as guide post and guide sleeve in die manufacturing.

(7)氮化；常用于工作載荷不大，但要求高耐磨、抗耐蝕的冷成形凹模、奧氏體不銹鋼用拉伸模具等。

(7) Nitriding; It is commonly used in cold forming concave dies with small working load but requiring high wear resistance and corrosion resistance, drawing dies for austenitic stainless steel, etc.

(8)冷處理；適宜于復雜的冷作模具或高合金鋼制造的模具。冷處理后馬氏體轉變量增多，鋼的硬度增加，但模具的尺寸也略大。

(8) Cold treatment; It is suitable for complex cold working molds or molds made of high alloy steel. After cold treatment, the martensite transformation increases and the hardness of steel increases, but the size of die is also slightly larger.

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