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轴承钢的球化组织如何直接与奥氏体化残留碳化物的形状有关?为此,研究了奥氏体化温度,加热速度,保温时间对奥氏体化残留碳化物的大小和数量的影响。综合考虑奥氏体化温度和加热速度的影响,对控制球状碳化物组织是非常重要的。要获得粗大的球状碳化物,就需要缓慢加热,高温固溶。加热速度之所以影响大,是由于在加热到Ac1相变点之前,就发生了碳向晶界的移动和渗碳体片的分离。
How does the ball structure of bearing steel directly relate to the shape of austenitizing residual carbides? To this end, the effects of austenitizing temperature, heating rate and holding time on the size and amount of austenitizing residual carbides . Considering the influence of the austenitizing temperature and the heating rate, it is very important to control the spherical carbide structure. To obtain coarse spherical carbides, you need to slowly heat, high temperature solution. The reason why the heating rate is large is that the movement of carbon to the grain boundary and the separation of the cementite sheet occur before heating to the Ac1 transformation point.