LY12 铝合金电子束焊接头组织和性能研究.PDFVIP

网络出版时间：2014-04-14 14:31 网络出版地址：/kcms/detail/61.1133.TG1431.055.html 加工工艺曳 2014 年4 月第43 卷第7 期 LY12 铝合金电子束焊接头组织和性能研究 余爱武 杨成刚 郑强 何宇 陈和 (南昌航空大学轻合金加工科学与技术国防重点学科实验室袁江西南昌330063) 摘 要院采用真空电子束焊对LY 12 铝合金进行焊接 分析了焊接速度尧电子束流对焊缝组织的影响规律 并对接 头拉伸性能进行了测试遥试验结果表明 随着焊接速度增加或电子束流降低 焊缝组织逐步 化 接头强度增加 当电子 束流 18 mA 尧焊接速度 1000 mm/min 时 焊缝组织最 小 接头 拉强度最高 373.2 MPa 遥 关键词院电子束焊曰接头强度曰微观组织 中图分类号院TG456.3 文献标识码院A 文章编号院1001-3814(2014)07-0181-02 Study on Microstructure and Properties of Welded Jo int of LY12 Aluminum Alloy by Electron Beam Welding YU Aiwu, YANG Chenggang, ZHENG Qiang HE Yu, CHEN He (National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China) Abstract 院LY 12 aluminum alloy was welded with vacuum electron beam welding, the effect of welding speed and electron beam current on the weld microstructure and mechanical properties of the welded j oint were studied. The results show that with the increase of welding speed or decrease of electron beam current, the grains in weld metal can be refined, so the j oint strength increases. When the electron beam current is 18mA, the welding speed is 1000mm/min, the grains of weld metal were finest, the tensile strength of the welded j oint is 373.2 MPa. Key words 院electron beam welding; j oint strength; microstructure LY 12 铝合金是Al-Cu-Mg 系硬铝合金 因其具 试验材料 LY 12 铝合金 尺寸 200 mm伊50 有良好的高温塑性和力学性能 常用于制造中等载 mm伊2 mm