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产生热处理变形的基本条件是零件有较大的内应力和较好的塑性。采用相应的热处理方法,调整上述两个基本条件,即可使零件取得预期的变形效果,使零件尺寸复原。其方法可分为三类。一.孔形、饼形零件内孔和外形尺寸的收缩处理零件的内孔或外形尺寸因加工超差或使用中磨损,可用下列收缩处理方法复原。 1 在Ac_1温度下加热急冷法 (1)工艺方法零件加热至Ac_1温
The basic conditions of heat treatment deformation is the part has greater internal stress and better plasticity. Adopt the corresponding heat treatment method, adjust the above two basic conditions, can make the expected deformation effect of the part, make the parts size recovery. The method can be divided into three categories. A hole-shaped, pie-shaped parts of the hole and the shrinkage of the overall dimensions of the parts bore or external dimensions due to processing or poor wear and tear, the following shrinkage treatment can be used to recover. 1 Acceleration at Ac_1 Temperature Quenching (1) Process Method Parts are heated to Ac_1 temperature