In practice, cold work die steel refers to the heat treatment of die parts. There are many kinds of cold working dies, mainly including cold blanking die, cold heading die, cold extrusion die, cold drawing die, etc. Due to the great differences in shape and structure, the operating conditions and functional requirements are also different. In addition to selecting appropriate data, a good heat treatment process should also be selected to meet the functional requirements of the die and improve the service life of the die.

冷加工模具一定在锻后进行球化退火,锻坯的铸造应力,改进显微安排,下降硬度,以便于机械加工,为热处理做准备。

The cold working die must be spheroidized and annealed after forging to eliminate the casting stress of the forging blank, improve the microstructure arrangement and reduce the hardness, so as to facilitate machining and prepare for heat treatment.

淬火是冷加工模具热处理中的一项重要操作。它对模具的使用功能有很大的影响,应特别注意。应注意以下几点:

Quenching is an important operation in the heat treatment of cold working die. It has a great impact on the use function of the die, which should be paid special attention to. The following points should be noted:

冷作模具钢材

Cold working die steel

1)应承认模具资料,并查看模具表面是否有划痕和裂纹等缺点。

1) Acknowledge the mold data and check whether the mold surface has defects such as scratches and cracks.

2)根据模具的形状,估计模具的文学和武术的趋势,并使各种各样的堵塞,绑定或绑定,以使均匀的加热和冷却。

2) According to the shape of the mold, estimate the trend of mold literature and martial arts, and make a variety of blocking, binding or binding to make uniform heating and cooling.

3)淬火加热温度的合理挑选奥氏体不只必须与某些合远素和碳固溶,以保证模具的淬透性、硬化才能、强度和热硬度,并且必须有恰当的过量碳化物来细化晶粒,进步模具的耐磨性,并保证模具具有必定的耐性。同时,应考虑模具温度对加热过程中变形和预热的影响。

3) Reasonable selection of quenching heating temperature austenite must not only be solid solution with some alloying elements and carbon to ensure the hardenability, hardening ability, strength and thermal hardness of the die, but also have appropriate excess carbide to refine the grain, improve the wear resistance of the die and ensure that the die has certain resistance. At the same time, the influence of die temperature on deformation and preheating during heating should be considered.

4)淬火、加热和保温时刻的合理挑选对于-般模具的淬火和加热,保温时刻可根据加热设备选用的经历公式计算。然而,在实践热处理操作中,应考虑模具零件的具体条件。特别是对于复杂的模具,应综合考虑各种影响因素,经过试验确认好的淬火和保温时刻。

4) Reasonable selection of quenching, heating and heat preservation time for the quenching and heating of general molds, the heat preservation time can be calculated according to the experience formula selected by the heating equipment. However, in the practical heat treatment operation, the specific conditions of die parts should be considered. Especially for complex molds, various influencing factors shall be comprehensively considered, and the good quenching and holding time shall be confirmed through tests.