热处理温度对SLM成形316L不锈钢组织性能影响研究
Effect of Heat Treatment Temperature on Microstructure and Mechanical Properties of 316L Stainless Steel Formed by SLM
姚宇荃1
作者信息
- 1. 航空工业成都飞机设计研究所,成都 610091
- 折叠
摘要
使用选区激光熔化(SLM)技术制备 316L不锈钢试样以及残余应力样件,采用光学显微镜、扫描电子显微镜(SEM,配备电子背散射衍射探头EBSD)、显微硬度计等研究不同热处理工艺对SLM成形 316L的显微组织、显微硬度、力学性能以及残余应力的影响,得到最优热处理工艺.结果表明SLM制备制件组织致密,在最优热处理 1 000℃、保温 2h制度下,试样的性能稳定,显微硬度及拉伸性能各向异性差异小,残余应力小.此研究为SLM成形 316L不锈钢的力学性能优化及显微组织调控提供了强有力的基础.
Abstract
The different 316L samples and residual stress parts were manufactured by the selective laser melting(SLM)technology.The effect of the different heat treatment conditions on the microstructure,micro-hardness,mechanical properties and residual stress of 316L stainless steel samples formed by using SLM were investigated via optical microscope,scanning electron microscopy(SEM,equipped with electron backscatter diffraction(EBSD)probe),micro-hardness tester.The optimum heat treatment condition is obtained.The result show that the structure of316L stainless steel parts formed by SLMare very dense.Under the best heat treatment condition,which is holding at 1000℃ for 2 h,the samples have stable mechanical properties,lower residual stress.This study provides a strong basis for optimizing the mechanical properties and microstructure adjustment of 316L stainless steel formed by using SLM.
关键词
SLM/316L/热处理/残余应力Key words
SLM/316L/heat treatment/residual stress引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据