焊接速度对2219铝合金搅拌摩擦焊根部塑性流动的影响  

The Effect of Welding Speed on the Root Flow of Plastically Metal by Friction Stir Weld of 2219 Aluminum Alloy

作　　者：王道[1] 黄春平[1] 李建萍[1] 柯黎明[1] 

机构地区：[1]南昌航空大学,南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2013年第3期65-68,共4页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家自然科学基金(51265043/50875119);航空科学基金(20111156004);江西省优势科技创新团队项目(20113BCB24010);江西省高校科技落地计划项目(KJLD13055/KILD12074)

摘　　要：采用不同焊接速度对2219铝合金进行搅拌摩擦焊接,焊后通过标示材料观察焊缝根部塑性金属的流动特征。结果表明:在其他条件一定时,随着焊接速度的增加,焊缝根部前进边侧容易产生孔洞缺陷,焊接速度为75 mm/min时,无孔洞缺陷产生;随着焊接速度的增加,搅拌针所形成的"抽吸挤压"效应减弱,根部塑性金属流动的驱动力减小,而其做塑性迁移的阻力增大,导致塑性金属流动范围随之减小。The butt joining of 2219 Aluminum was carried out by using friction stir welding with different welding speed. The pattern of root flow of friction stir welding was analyzed under different conditions through labeling material. The results show that, when other conditions are constant, it is easy to produce cavities on the advance side of root weld with the increase of weld speed. There is no cavity when the weld speed is 75 ram/rain. With the increase of weld speed, the sucking-extruding effect weakened and the drive force of root plastic metal flow decreased. However, the resistance of plastic flow increased which leading to the range of plastic metal flow decreased.

关 键 词：铝合金 搅拌摩擦焊 焊缝根部 塑性流动 

分 类 号：TB331[一般工业技术—材料科学与工程]