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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。
A liquid rocket engine integrated storage tank using 07Cr17Ni7Al precipitation hardened stainless steel as the shell material, due to the overall weight loss, the design of theoretical calculations of mechanical properties of materials beyond the conventional national standards, under the existing conditions, conventional welding and heat treatment process Can not meet the development requirements, in order to break through the bottleneck of the tank research, through the trial of its own performance and welding performance of the material for many rounds of trials, comprehensive literature research and material properties choose three kinds of heat treatment temperature range and two kinds of heat treatment timing Precipitation hardening stainless steel technology research, in order to find suitable products to meet the mechanical properties of the appropriate process parameters. After analysis of test data, comprehensive performance indicators, screening out the appropriate process parameters to meet the design requirements. Hydraulic blasting test is conducted on the tank products processed with this process parameter. The blasting data proves that the mechanical performance of the integrated tank manufactured with the improved process parameters meets the design requirements.