摘要
铝合金具有密度低、比强度高、耐腐蚀性好等特点,很好地满足航天飞行器轻量化需求。激光选区熔化技术(SLM)成形的铝合金零件综合性能良好,在航天领域应用广泛,但存在成形过程中缺陷不好控制、成形件表面质量较差、后处理工序烦琐等问题。为此,选取AlSi10Mg铝合金,针对SLM成形AlSi10Mg铝合金缺陷消除进行实体工艺优化研究,获得缺陷最少的优化工艺参数,并进一步研究表面粗糙度优化方法。结果表明,通过优化工艺参数(主要包括扫描功率、扫描速度、扫描间距),可以获得较低的孔隙率(9.2%)和较优的内部成形质量;成形件表面质量主要影响因素有表皮扫描功率、扫描速度、扫描间距等,适当提高扫描功率可以获得较好的表面质量。
Aluminum alloy has the characteristics of low density,high specific strength and good corrosion resistance,which can well meet the lightweight needs of aerospace vehicles,and the aluminum alloy parts manufactured by selective laser melting(SLM)technology have good comprehensive properties and have been widely used in the aerospace field.However,there are some problems in the forming process,such as poor defect control,poor surface quality,cumbersome post-treatment process and so on.This paper selects AlSi10Mg aluminum alloy fabricated by SLM to conduct a solid process optimization study for defect elimination,in order to obtain the optimized process parameters with the least defects and further study the surface roughness optimization method.Results show that lower porosity(9.2%)and better internal forming quality can be obtained by optimizing the process parameters(mainly including scanning power,scanning speed,scanning spacing).The main influencing factors of the surface quality of the formed parts are scanning power,scanning speed,scanning spacing,etc.It is found that appropriately increasing the scanning power can obtain better surface quality.
作者
时云
王联凤
杜洋
李坤
施祥玲
Shi Yun;Wang Lianfeng;Du Yang;Li Kun;Shi Xiangling(Shanghai Aerospace Equipments Manufacturer Co.,Ltd.,Shanghai 200245,China;Southeast University,Nanjing 210096,Jiangsu,China;Shanghai Engineering Research Center of Additive Manufacturing,Shanghai 200245,China;Shanghai Public Transport Card Co.,Ltd.,Shanghai 200002,China)
出处
《应用激光》
CSCD
北大核心
2023年第3期19-25,共7页
Applied Laser
基金
上海市科技人才项目资助(19XD1431600)
上海市财政项目资助(20YF1417600)。
关键词
激光选区熔化
铝合金
工艺参数
成形缺陷
表面粗糙度
laser selective melting
aluminium alloy
process parameter
forming defect
surface roughness
