火箭发射台大尺寸薄壁支撑部件铸造工艺实践  

Casting Process for Large Dimension Thin-wall Supporting Component of Rocket Launch Pad

作　　者：何冠杰[1] 黎定仕[1] 任晓伟[1] 

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《铸造技术》2015年第7期1890-1892,共3页Foundry Technology

摘　　要：为满足火箭发射台恶劣的使用环境要求,对发射台上大尺寸薄壁支撑部件提出了严格铸造质量要求。通过采用电弧炉+AOD精炼、树脂砂造型工艺,制造了大尺寸、均匀壁厚、复杂结构铸件,采用860℃正火+860℃水淬+620℃回火的热处理工艺,材料力学性能达到屈服强度:745MPa;抗拉强度870MPa;断后伸长率17.5%;断面收缩率68%;冲击功100 J.部件内部品质达到GB5677-2009射线2级,达到了QJ910订货标准。To meet the severe use environment requirements of the rocket launch pad, strict casting quality of the lamina supporting component was required. The large dimension, equal wall thickness, complicate structure casting was produced by using arc furnace ＋ AOD refinement with colophony sand shaping process. By applying the heat treatment process 860℃ normalizing ＋ 860℃ water hardening ＋ 620℃ backfire heat treatment process, the mechanical performance reaches Rp0.2：745 MPa; Rm：870 MPa; A：17.5% ; Z：68% ; Akv：100 J. The internal quality of the component reaches GB5677-2009 radial class 2, QJ910 indent standard.

关 键 词：发射台 射线探伤 热处理 

分 类 号：V55[航空宇航科学与技术—人机与环境工程] TG24[金属学及工艺—铸造]