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固体火箭发动机燃烧室属于薄壁筒形件,热处理很易变形,而且由于焊缝较多,采用盐浴加热淬火存在残盐腐蚀问题。为了根除腐蚀问题,确保产品经长期贮存之后的使用安全,我们对燃烧室作了真空淬火、回火试验。试验结果表明,真空淬火、回火无氧化,无脱碳,完全避免了残盐腐蚀问题,产品的机械性能符合质量要求。变形量虽比盐浴等温淬火的大,但比气体保护加热淬火的变形小,符合产品质量要求,可以取代盐浴加热淬火。
Solid rocket engine combustion chamber is a thin-walled cylinder, heat treatment is very easy to deformation, and because of the weld more, the use of salt bath quenching residual salt corrosion problems. In order to eradicate the problem of corrosion, to ensure the safety of the product after long-term storage, we made a vacuum quenching and tempering test on the combustion chamber. The test results show that vacuum quenching, tempering without oxidation, no decarburization, completely avoid the residual salt corrosion problems, the mechanical properties of products meet the quality requirements. Although the amount of deformation than the salt bath isothermal quenching, but less than the deformation of the gas protection heating quenching, in line with product quality requirements, can replace the salt bath heating quenching.