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发明公开
CN107937671A 一种动车组用摇臂的热处理方法 无效 - 驳回

一种动车组用摇臂的热处理方法
摘要：
本发明公开了一种动车组用摇臂的热处理方法，包括1)淬火：以加热速度50-100℃/h加热至温度850-880℃，在该温度段保温3-8h，出炉空冷预冷到800℃左右；2)PAG冷却介质中整体淬火：3)循环搅拌冷却；4)回火：以加热速度50-100℃/h加热至温度520-580℃，在该温度段保温4-10h，然后水冷至室温。动车组用摇臂通过本发明热处理后抗拉强度满足900-1100MPa，屈服强度≥850MPa，一次热材料合格率95％以上，无一开裂。
摘要（英）：

The invention discloses a heat treatment method of a rocker arm for a motor train unit. The heat treatment method comprises the following steps of 1) quenching, wherein the rocker arm is heated to 850-880 DEG C at the heating speed of 50-100 DEG C per hour, heat preservation is carried out for 3-8 hours in the temperature period, and the rocker arm is taken out from a furnace for air cooling and is pre-cooled to about 800 DEG C; 2) integral quenching, wherein integral quenching is carried out in a PAG cooling medium; 3) circularly stirring and cooling; and 4) tempering, wherein the rocker armis heated to 520-580 DEG C at the heating speed of 50-100 DEG C, heat preservation is carried out for 4-10 hours in the temperature period, and then the rocker arm is water-cooled to the room temperature. According to the heat treatment method, the tensile strength of the rocker arm for the motor train unit can reach 900-1100MPa, the yield strength of the rocker arm is more than or equal to 850MPa, the pass percent of the rocker arm is more than 95% after the heat treatment, and no cracking is caused.

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