Combined with the current processing technology to analyze, in the processing of GCr15 stainless steel ball, the main process route can be summarized as: ball billet forming, boring, soft grinding, heat treatment, hard grinding, fine grinding, lapping, or polishing, and finally super Lapping. Among them, the GCr15 stainless steel ball blank forming process is mainly used for punching out qualified ball blanks, and at the same time, the composition of the steel during the forming process can be more uniform.
Not only that, it is also beneficial to reduce the content of poor tissue, making the impact of GCr15 stainless steel sphere defects to a minimum, and to prepare the shape and structure for subsequent processing steps. The boring process design is mainly to remove the ring belt and the poles of the ball blank, and to correct the deviation of the pressure of the ball, so that the diameter tolerance of the steel ball is more uniform.
In addition, the reason for soft grinding is mainly because it can eliminate the tooth marks left by the previous machining process, boring fatigue and the decarburized layer of the material, which helps to improve the accuracy of the GCr15 stainless steel ball before heat treatment. Make the size of the sphere closer to the required size, but also for the subsequent process to leave a good margin.
It is also followed by heat treatment. Heat treatment is a very critical process. This process will enable the GCr15 stainless steel sphere to obtain a more suitable internal structure with a certain hardness to ensure that it has a certain strength and wear resistance.
The subsequent hard-grinding step can further eliminate the dimensional error of the GCr15 stainless steel ball, reduce the dimensional deformation, make it meet the technical requirements, and can improve the mechanical properties. In addition, the fine-grained process allows the GCr15 stainless steel ball to meet the required accuracy and reduce the surface roughness of the ball.