How to prevent heat treatment deformation of precision stamping parts mold 'hardware'

In the heat treatment process, the precision stamping part mold often deforms. In order to prevent this bad phenomenon, as long as the deformation law is grasped, the cause is analyzed, and the deformation of the mold can be reduced by using different methods to prevent it. Can be controlled. Generally speaking, the following methods can be used to prevent heat treatment deformation of precision and complex molds. (1) Precision stamping parts molds are selected according to fairness. For precision and complex molds, micro-deformed mold steels with good materials (such as air-quenched steels) should be selected. For mold steels with severe carbide segregation, fair casting should be carried out. For larger and uncastable mold steels, solution double-refining heat treatment can be carried out. . (2) The mold structure design of precision stamping parts should be fair, the thickness should not be too large, and the shape should be symmetrical. For large deformed molds, the deformation law should be grasped and the machining allowance should be reserved. For large, precise and complex molds, a combined structure can be used. (3) The complex molds of precision stamping parts should be pre-heated to remove the residual stress generated during the machining process. (4) Choose the heating temperature reasonably and control the heating speed. For precision and complex molds, slow heating, preheating and other balanced heating methods can be adopted to reduce the heat treatment deformation of the mold. (5) Under the condition of ensuring the hardness of the mold, try to use the pre-cooling, hierarchical cooling quenching or warm quenching process. (6) For precision and complex molds, if the premise permits, try to use vacuum heating and quenching and cryogenic treatment after quenching.