| Al-12．7Si-0．7Mg合金脉冲MIG焊接头组织与性能 |
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| 引用本文： | 何长树,王东,张朝威,赵刚,赵骧,左良.Al-12．7Si-0．7Mg合金脉冲MIG焊接头组织与性能[J].沈阳黄金学院学报,2011(4):292-295. |
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| 作者姓名： | 何长树 王东 张朝威 赵刚 赵骧 左良 |
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| 作者单位： | [1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]中国科学院金属研究所,沈阳110016 |
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| 基金项目： | 国家科技支撑计划项目（节约型高硅变形铝硅合金生产工艺开发与示范,2009BAE80B01）;国家科技支撑计划项目（高速列车关键材料及部件可靠性,2009BAG12A07-B02）;国家863计划项目（高速列车结构件用铝合金材料研制,2008AA030701）;长江学者和创新团队发展计划项目（IRT0713）. |
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| 摘 要： | 采用进口ER4047作为填充焊丝对Al-12．7Si-0．7Mg合金热挤压板材实施脉冲MIG直缝对焊．利用金相观察、显微硬度测定及拉伸性能测试等方法研究了焊接接头的显微组织与力学性能．结果表明：利用优化的焊接工艺参数，获得了外观和内部质量良好的焊缝，焊接接头平均抗拉强度为180MPa，达到基材的98％．
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| 关 键 词： | Al-12．7Si-0．7Mg合金 脉冲MIG焊 焊接接头 显微组织 力学性能 |
Microstructure and mechanical properties of Al- 12. 7Si-0. 7Mg alloy joints welded by PMIG welding |
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| Authors: | HE Chang-shu WANG Dong ZHANG Chao-wei ZHAO Gang ZHAO Xiang ZUO Liang |
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| Affiliation: | 1. Key Laboratory of Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China 2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China) |
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| Abstract: | Hot extruded Al - 12. 7Si -0. 7Mg alloy plates were welded by pulsed metal inert gas （PMIG） welding method using imported ER4047 welding wire. The microstructures and mechanical properties of welded joint were studied by optical microscopy, microhardness test and tensile test methods. The results show that weld bead with good appearance and internal quality was obtained under the optimized welding parameters. The average tensile strength of the joint welded is 180 MPa, reached 98% of the base material. |
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| Keywords: | Al- 12 7Si-0 7Mg alloy PMIG welding welded joint microstructure mechanical property |
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