时效制度对GH4099合金选区激光熔化成形组织及性能的影响
Effect of aging treatment on the microstructure and properties of GH4099 alloy formed by selective laser melting
刘根 1霍俊美 1彭世清 1张熹雯 1毕中南 2张少明3
作者信息
- 1. 常州钢研极光增材制造有限公司,江苏常州 213100
- 2. 钢铁研究总院有限公司,北京 100081;北京钢研高纳科技股份有限公司,北京 100081
- 3. 钢铁研究总院有限公司,北京 100081
- 折叠
摘要
实验主要研究了选区激光熔化成形GH4099合金在不同热处理状态下的高温拉伸性能,并通过观测显微组织分析了造成其力学性能差异的原因.研究结果表明:经1150 ℃固溶1.5 h及800,850,900 ℃不同温度下时效8 h后,合金晶粒均出现了不同程度的等轴化,且随时效温度升高,GH4099合金的高温拉伸强度逐渐降低,塑性逐渐升高;观察其微观组织发现,时效温度不同时,晶粒内部形成的孪晶数量差异以及晶粒内部Y'析出相的尺寸和数量差异,造成了其高温拉伸性能的差异.
Abstract
In this study,the high temperature tensile properties of GH4099 alloy formed by selective laser melt-ing under different heat treatment conditions were studied,and the reasons for the difference in mechanical prop-erties were analyzed by observing the microstructure. The results show that after solution treatment at 1 150 ℃ for 1.5 h and aging at different temperatures at 800,850,900 ℃ for 8 h,the grains of the alloy are equiaxed to varying degrees. With the increase of aging temperature,the high temperature tensile strength of GH4099 alloy decreases gradually and the plasticity increases gradually. By observing the microstructure,it is found that the content and size of y ' phase and the content of the twin are different when the aging temperature is different,which leads to the difference of high temperature tensile properties.
关键词
选区激光熔化/GH4099/热处理/析出相/900/℃拉伸Key words
selective laser melting/GH4099/heat treatment/precipitate/tensile properties at 900 ℃引用本文复制引用
出版年
2024
NETL
NSTL
万方数据