摘要
利用选区激光熔化技术(SLM)成形AlSi10Mg合金,研究工艺参数对合金组织与性能的影响。发现随着激光功率的增大,Al(111)峰向右发生了偏移,这是因为SLM成形过程中,Si原子固溶进了Al基体中,发生了晶格畸变。而较大或较小的激光功率和扫描速度对SLM成形的AlSi10Mg合金组织和性能有显著的影响。激光功率较大或扫描速度较小使网络状Si相发生溶解、断裂和聚集,破坏细晶强化的作用,影响合金的性能;激光功率较小或扫描速度较大使得输入的激光能量不足,粉末不能充分熔化以形成未熔缺陷。较优工艺参数:激光功率为300W,扫描速度为1000mm/s,显微硬度最高可达2.21GPa。
The selective laser melting technology(SLM)has been used to form AlSi10Mg alloy,the influence of process parameters on the structure and properties of the alloy has been studied.It is found that as the laser power increases,the Al(111)peak shifts to the right.This is because during the SLM forming process,the Si atoms are solid-dissolved into the Al matrix,causing lattice distortion.The larger or smaller laser power and scanning speed have a significant effect on the structure and properties of the AlSi10Mg alloy formed by SLM.The larger laser power or small scanning speed causes the network Si phase to dissolve,fracture and agglomerate,destroy the effect of fine-grain strengthening,and influence the performance of the alloy;small laser power or large scanning speed makes the input laser energy insufficient,powder cannot melt sufficiently to form un-melted defects.The optimal process parameters:laser power is 300W,scanning speed is 1000mm/s,and the micro-hardness can reach up to 2.21GPa.
作者
邹烜
陈盛贵
陈秋丹
陈斌
陈坤
刘福生
李润霞
ZOU Xuan;CHEN Shenggui;CHEN Qiudan;CHEN Bin;CHEN Kun;LIU Fusheng;LI Runxia(Dongguan University of Technology,Dongguan 523808,Guangdong China;Shenzhen University,Shenzhen 518000,Guangdong China)
出处
《中国铸造装备与技术》
CAS
2022年第1期74-79,共6页
China Foundry Machinery & Technology
基金
广东省重点领域研发计划项目(2020B010186002)
东莞理工学院科研团队项目(TDYB2019003)。
