摘要
采用手工钨极氩弧焊对SLM增材制造方法打印的Al Si10Mg试板进行焊接,焊接后采用光学显微镜、扫描电镜、能谱分析仪对焊接接头进行组织观察和成分分析,并测试试板力学性能。结果表明:SLM成型的A1Si10Mg焊后退火态下横向(x-y)和纵向(z)的抗拉强度、伸长率分布较均匀,纵向的抗拉强度、伸长率略高于横向,而且优于ZL104(A1Si9Mg)铸造铝合金的力学性能。SLM成型的A1Si10Mg焊接后断裂于热影响区和母材区交界处,且沿此界面扩展并呈现韧窝+准解理形貌。
AlSi10Mg made by selective laser melting(SLM) additive manufacturing were welded using manual tungsten argon arc welding. Microstructure observation and composition analysis of welded joint were carried out by optical microscope(OM), scaning electron microscope(SEM) and energy dispersive sperctrometer(EDS), then the mechanical properties of specimens were tested. The results show that the tensile strength and elongation of AlSi10Mg made by selective laser melting after welding in x-y direction(transverse) and z direction(longitudinal) in annealing state were uniform. The longitudinal tensile strength and elongation is better than transverse ones, the mechanical properties of specimen made by SLM is better than that of ZL104(A1Si9Mg). AlSi10Mg made by selective laser melting after welding fractures in the region between HAZ and base metal.The fracture expands along this interface, showing the dimple+ cleavage characteristic.
作者
马龙
倪家强
张英伟
刘艳梅
张利
MA Long;NI Jiaqiang;ZHANG Yingwei;LIU Yanmei;ZHANG Li(Shenyang Aircraft Corporation,Shenyang 110850,China;Shanyang Aerospace University,Shenyang 110136,China)
出处
《热加工工艺》
北大核心
2020年第3期63-66,共4页
Hot Working Technology
基金
国家重点研发计划(2017YFB1104000).
