焊接电流和焊接速度对CMT成型铜合金组织和力学性能的影响

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英文篇名：Effect of Welding Current and Welding Speed on Microstructure and Mechanical Properties of Copper Alloy Formed by CMT 作者：高东强 ; 杨新妮 ; 赵阳 英文作者：GAO Dongqiang;YANG Xinni;ZHAO Yang;Faculty of Mechanical and Electrical Engineering, Shanxi University of Science and Technology;Key Laboratory of Remanufacturing Equipment for National Defense Science and Technology, Army Armored Forces Academy; 关键词：冷金属过渡技术 ; 铜合金 ; 组织和性能 英文关键词：cold metal transfer technology;;copper alloy;;microstructure and properties 中文刊名：SJGY 英文刊名：Hot Working Technology 机构：陕西科技大学机电工程学院;陆军装甲兵学院装备再制造技术国防科技重点实验室; 出版日期：2019-03-19 09:23 出版单位：热加工工艺 年：2019 期：v.48;No.507 基金：国家重点研发计划项目(SQ2018YFB110130) 语种：中文; 页：SJGY201905006 页数：5 CN：05 ISSN：61-1133/TG 分类号：32-36

摘要

采用铜合金焊丝进行CMT成型,分析焊接电流和焊接速度对成型件组织和力学性能的影响。结果表明,焊丝可在304不锈钢基材上不断逐层累积,形成薄壁墙体。组织内有较为明显的分层现象,和焊接速度相比,焊接电流对显微组织的影响较为显著。随着焊接电流的增加,硬度先减小后增加,平行于增材方向的抗拉强度减小,伸长率增大;垂直于增材方向上的抗拉强度没有显著变化。随着焊接速度的增加,硬度先增加后减小。对于平行于增材方向,试样抗拉强度先减小后增加,而伸长率先增加后减小;对于垂直于增材方向,试样抗拉强度和伸长率均先增加后减小。
        CMT forming was carried out by using copper alloy welding wire. The effect of welding current and welding speed on the microstructure and mechanical property of the forming part was analyzed. The results show that the welding wire could be accumulated layer by layer on the 304 stainless steel base material to form thin wall part. There is obvious lamination phenomenon in the microstructure. Compared with that of the welding speed, the effect of welding current on the microstructure is more significant. With the increase of welding current, the hardness decreases firstly and then increases. The tensile strength decreases and elongation increases in direction parallel to surfacing direction. The tensile strength has no significant change in direction vertical to surfacing direction. With the increase of welding speed, the hardness increases firstly and then decreases. For the direction parallel to surfacing direction, the tensile strength decreases first and then increases,while the elongation increases first and then decreases. For the direction vertical to surfacing direction, the tensile strength and elongation of the specimens increase first and then decrease.

引文

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