5356铝合金电弧快速成型工艺及组织性能  

Study on rapid prototyping technology and microstructure and properties of 5356 aluminum alloy

作　　者：刘俊岭 刘正文 王龙飞 陈英杰[2] 焦向东[2] 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]北京石油化工学院机械工程学院,北京102617

出　　处：《电焊机》2018年第1期43-46,共4页Electric Welding Machine

摘　　要：采用MIG焊进行5356铝合金的快速成型试验。利用万能试验机、光学显微镜、扫描电镜等设备研究5356铝合金成型件的形貌、微观组织特点及焊接电流和层间冷却时间对成型组织及力学性能的影响。结果表明,焊后成型件主要存在α(Al)、β(Mg_5Al_8)和(FeMn)Al_6相。当层间冷却时间固定时,随着焊接电流增大,成型件抗拉强度增大。当层间冷却时间为60 s时,焊接电流为90 A,达到最大抗拉强度273.57 MPa。若继续增大电流,抗拉强度降低。当焊接电流固定时,随着层间冷却时间的增加,成型件抗拉强度增大。当层间冷却时间为60 s时,成型件形貌更加美观。he 5356 ahmfinum alloy rapid prototyping test was carried out by MIG welding. The moq）hoh）gy and mierostructure characteristics of 5356 aluminum alloy moldings,eftect of welding current and interlayer cooling time on molding structure and mechanical properties were observed by universal testing maehine,optical microscope and scanning electron micrnseope,et al. The results show that there are mainly α（Al）,β（MgsAls） and （FeMn）A16 in the tbrming parts. The tensile strength of the forming pal＇ts inereases with the increase of welding current in same interlayer cooling time. The highest tensile strength of the forming parts reaches 273.57 MPa when the interlayer cooling time is 60 s,the welding eurrent is 90 A. The tensile strength get decrease when continue to increase the welding current. The tensile strength of the molded parts increases with the increase of interlayer cooling time in same welding eurrent. When the interlayer cooling time is 60 s,the shape of the forming parts is relatively beautiful.

关 键 词：快速成型 焊接电流 层间冷却时间 微观组织 力学性能 

分 类 号：TG457.14[金属学及工艺—焊接]