摘要
某液体火箭发动机一体化贮箱采用07Cr17Ni7Al沉淀硬化不锈钢作为壳体材料,由于总体减重需要,设计理论计算材料的机械性能指标超出常规国家标准值,在现有条件下,常规焊接及强化热处理工艺不能满足研制要求,为突破贮箱研制瓶颈,通过对材料自身性能及焊接性能进行多轮次的试验摸索,综合文献研究及材料自身性能选择3种强化热处理温度区间和2种热处理时机进行此种沉淀硬化不锈钢的工艺技术研究,以期寻找满足产品机械性能要求的合适工艺参数。经过分析试验数据,综合性能指标,筛选出满足设计要求的合适工艺参数。对用此工艺参数加工的贮箱产品进行液压爆破试验,爆破数据证明采用改进后的工艺参数制造出的一体化贮箱机械性能达到了设计指标要求。
07Crl 7Ni7Al precipitation-hardening stainless steel is used as the shell material of the integrative tank in a liquid rocket engine. For the indexes of the mechanical properties exceed the design requirements of the national standard, and the existing welding and strengthening heat-treatment process can not meet the requirements of the development, three strengthening heat-treatment temperature intervals and two heat-treatment systems were selected for the technology research of the precipitation-hardening stainless steel according to the material properties and welding performance tests to seek the process parameters suitable for the product requirement. The appropriate process parameters were selected by means of analysis of the experimental data and performance indexes. The hydraulic blasting test data of the tank proves that the improved process parameters in manufacturing of the integrative tank meet the design requirement, and support the application of precipitation-hardening stainless steel in high performance liquid rocket engine tank containers.
出处
《火箭推进》
CAS
2016年第6期62-67,共6页
Journal of Rocket Propulsion
基金
中国航天科技集团重大工艺专项资助项目(ZDGY2013-19)
关键词
沉淀硬化不锈钢
一体化贮箱
强化热处理
precipitation-hardening stainless steel
integrative tank
strengthening heat-treatment
