一、前言GCr15的网状碳化物是轴承钢碳化物不均匀性的表现形式之一。钢材中的网状碳化物增加轴承零件的淬火开裂倾向,保留在轴承零件中的网状碳化物又明显地增加脆性,降低韧性,从而缩短轴承的使用寿命。为了解决这个问题,根据我车间生产任务重、轧件速度快的特点,在力求产量高、对终轧温度不加控制的情况下,采用冷床喷雾和轧后穿水的方法,分别对中等规格的轧材—φ38mm直条和φ12mm 盘圆进行了轧后快冷的初步 I. Introduction GCr15 mesh carbide is one of the manifestations of bearing steel carbide heterogeneity. The reticular carbides in the steel increase the tendency of quenching and cracking of the bearing parts. The retained carbides in the bearing parts obviously increase the brittleness and reduce the toughness, thereby shortening the service life of the bearing. In order to solve this problem, according to my workshop production tasks heavy, fast rolling characteristics, in the pursuit of high output, the rolling temperature is not controlled under the circumstances, the use of cold bed spray and water after rolling method, respectively, for medium Specifications of the rolled-φ38mm straight and φ12mm round plate after the initial rapid cooling after rolling