火箭推进2017，Vol.43Issue(3)：53-58,6.
K4202镍基高温合金激光选区熔化成形室温拉伸性能研究
Mechanical properties of selective laser melted and shaped K4202 nickel-based superalloy at room temperature
左蔚 1张权明 1雷玥 1彭东剑1
作者信息
- 1. 西安航天发动机厂, 陕西西安710100
- 折叠
摘要
Abstract
In order to promote selective laser melting (SLM) to shaping of superalloy complicated structural components of liquid rocket, and meet its requirement, the mechanical property and strength mechanism of K4202 superalloy formed by SLM are analysed. The tensile tests were executed in the deposited state at room temperature. The mechanical performance index got from the tests shows a very strong anisotropy, even is close to or exceeds the standard value of GH4202 alloy forgings. Physical and chemical analysis means of optical micrographs (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy(EDS), X-ray diffraction(XRD) etc. revealed its main strength mechanism, which is fine-grain strengthening , strain hardening and supersaturation solution strengthening. Three heat treatments of solution, solution aging and direct aging were studied in order to evaluate the influence on the mechanical properties of K4202 superalloy. The research result shows that the mechanical properties of the superalloy after direct aging heat treatment are the best.关键词
K4202高温合金/激光选区熔化/力学性能试验/热处理Key words
K4202 nickel-based superalloy/selective laser melting/mechanical property tests/heat treatment分类
航空航天引用本文复制引用
左蔚,张权明,雷玥,彭东剑..K4202镍基高温合金激光选区熔化成形室温拉伸性能研究[J].火箭推进,2017,43(3):53-58,6.
