最近,我读了王成家先生的《冷旋压封头在压力容器中的应用》(1997年第1期)一文,感到有些观点值得商讨。下面就简单地谈一谈本人的一点浅见。文章首先举了该公司外加工冷旋封头的出现网状裂纹而报废的事例,进而进行分析,认为这种裂纹属于时效裂纹,从工艺上讲封头存在残余应力,最后,认为必须热处理,必须选择合适的热处理规范。冷加工使封头内部存在残余应力,但是否一定要 Recently, I read Mr. Wang Chengji’s article “Application of Cold Spinning Heads in Pressure Vessels” (No. 1, 1997) and felt that some ideas were worth discussing. Here’s a brief talk about my point. First of all, the article cited the case of net-shaped cracks and discarding of the outer head of the company’s cold-rolling head, and then analyzed that the crack belongs to the aging crack, and there is residual stress in the head from the craft. Finally, it is considered that the crack must be heat-treated, Must choose the appropriate heat treatment specification. Cold working leaves a residual stress inside the head, but it is not absolutely necessary