热处理对SLM成形AlSi10Mg合金组织及力学性能的影响  

Effect of Heat Treatment on the Microstructure and Mechanical Properties of AlSi10Mg Alloy Formed by SLM

作　　者：汤成龙 史建军 戚志鹏 刘中文 Tang Chenglong;Shi Jianjun;Qi Zhipeng;Liu Zhongwen(School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing Jiangsu 211167,China;Industrial Center,Nanjing Institute of Technology,Nanjing Jiangsu 211167,China)

机构地区：[1]南京工程学院机械工程学院,江苏南京211167 [2]南京工程学院工业中心,江苏南京211167

出　　处：《山西冶金》2025年第1期12-15,共4页Shanxi Metallurgy

摘　　要：基于激光选区熔化成形AlSi10Mg合金,制定了16种热处理工艺,并分析不同热处理工艺对试样组织及力学性能的影响,得到较优的热处理工艺,为激光选区熔化成形AlSi10Mg制定合适的后处理方案。结果表明:随着热处理温度从200℃升高至300℃,致密度从99.64%减少到99.19%,总体上呈现减少趋势。而在500℃时,致密度为99.54%。相同保温温度下,致密度总体上随着保温时间的增加而逐渐增加。随着热处理温度从200℃升高到500℃,硬度(HV)由187.8下降到85.7,总体上呈现下降趋势。在相同热处理温度下(除200℃外),随着保温时间的延长,硬度呈减小趋势。综合比较,在200℃下保温2 h后空冷处理,是较为合适的后处理方案。Based on laser selective melting forming of AlSi10Mg alloy,16 heat treatment processes were developed,and the effects of different heat treatment processes on the microstructure and mechanical properties of the samples were analyzed.The optimal heat treatment process was obtained to develop a suitable post-treatment plan for laser selective melting forming of AlSi10Mg.The results showed that as the heat treatment temperature increased from 200℃ to 300℃,the density decreased from 99.64% to 99.19%,showing an overall decreasing trend.At 500℃,the density is 99.54%.At the same insulation temperature,the overall density gradually increases with the increase of insulation time.As the heat treatment temperature increases from 200℃ to 500℃,the hardness decreases from(HV)187.8 to(HV)85.7,showing an overall downward trend.At the same heat treatment temperature(except for 200℃),the hardness shows a decreasing trend with the extension of insulation time.After comprehensive comparison,air cooling treatment after 2 hours of insulation at 200℃ is a more suitable post-treatment solution.

关 键 词：激光选区熔化 AlSi10Mg 热处理 致密度 微观组织 显微硬度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]