摘要
为优化选区激光熔化Fe-10Cu合金的工艺参数,在使用ANSYS APDL模拟计算不同激光功率和扫描速度条件下单道单层温度场、分析熔池尺寸的基础上,通过实验考察了不同条件下成形的试样的致密度、硬度和凝固组织。结果表明:在铺粉厚度为40μm、扫描间距为100μm的条件下,选区激光熔化Fe-10Cu合金在激光功率345.6 W、扫描速度1 000 mm/s时成形的试样的致密度和硬度最高,分别达到99.8%和38.3HRC。选区激光熔化Fe-10Cu合金凝固组织为单一α-Fe相,选区激光熔化过程快速凝固导致铜过饱和并固溶在α-Fe中,是Fe-10Cu合金硬度得到提升的主要原因。
In order to optimize process parameters of selective laser melted of Fe-10Cu alloy,density,hardness and microstructure of fabricated samples were investigated based on the calculation of single track temperature field and analysis of melt pool size by ANSYS APDL under different conditions.The results show that the highest relative density and hardness,which are 99.8%and 38.3HRC,were achieved at a laser power of 345.6 W and a scanning speed of 1000 mm/s for the selective laser melted of Fe-10Cu alloy,under the condition of powder layer thickness of 40μm and a scanning spacing of 100μm.The solidification microstructure of the selective laser melted Fe-10Cu alloy displays a singleα-Fe phase.The main reason for enhanced hardness of Fe-10Cu alloy is copper supersaturation inα-Fe due to rapid solidification during the selective laser melted process.
作者
梁梦
黎振华
刘美红
罗心磊
解靖伟
LIANG Meng;LI Zhenhua;LIU Meihong;LUO Xinlei;XIE Jingwei(School of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China;School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《材料导报》
CSCD
北大核心
2023年第14期115-121,共7页
Materials Reports
基金
国家自然科学基金(51961017)
云南省重点研发计划(202101AS070017) 。
