大直径薄壁燃烧室壳体热处理变形研究

Research on Heat Treatment Deformation of Big Diameter Thin Wall Combustion Chamber Case

对30CrMnSiA钢大直径薄壁燃烧室壳体热处理变形规律进行了研究。结果表明:燃烧室壳体的直径和长度变化主要受热应力和组织应力影响,且组织应力的作用大于热应力,导致热处理后直径缩小,长度在一定范围变化。燃烧室壳体椭圆度及母线直线度主要受吊装方式、壳体焊接质量、油冷时壳体入油速度等工艺方法影响,采取专用工装,可以校正燃烧室壳体椭圆度及母线直线度。

This article discusses on deformation law of big diameter thin wall combustion chamber case of 30CrMnSiA steel after heat treatment. The results show that the deformation of diameter and length of combustion chamber case is affected by structure stress and heat stress. The structure stress larger than heat stress leads to deformation of diameter and length. The ovality and generatrix straightness of combustion chamber case are mainly affected by the technological methods such as lifting way, wilding quality and quenching speed during oil cooling. Special toolings can be used to correct the ovality and generatrix straightness of chamber case.