江周明,毛育青,陈玉华,等.焊接速度对Mg/Cu异种合金搅拌摩擦焊接接头成形的影响[J].精密成形工程,2018,10(5):45-49.
JIANG Zhou-ming,MAO Yu-qing,CHEN Yu-hua,et al.Effects of Welding Speed on Forming of Friction Stir Welded Mg/Cu Dissimilar Metal Alloy Joints[J].Journal of Netshape Forming Engineering,2018,10(5):45-49. |
| 焊接速度对Mg/Cu异种合金搅拌摩擦焊接接头成形的影响 |
| Effects of Welding Speed on Forming of Friction Stir Welded Mg/Cu Dissimilar Metal Alloy Joints |
| 投稿时间：2018-07-09 修订日期：2018-09-10 |
| DOI：10.3969/j.issn.1674-6457.2018.05.007 |
| 中文关键词: Mg/Cu异种合金 搅拌摩擦焊 焊接速度 接头成形 |
| 英文关键词: Mg/Cu dissimilar alloys friction stir welding welding speed joint formation |
| 基金项目:江西省教育厅科技项目(DA201803145)；轻合金加工科学与技术国防重点学科实验室开放基金(EG201703503)；无损检测技术教育部重点实验室开放基金(EW201703508)；江西省优势科技创新团队建设专项计划（20171BCB24007） |
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| 中文摘要: |
| 目的 研究不同焊接速度条件下镁铜异种合金搅拌摩擦焊接接头的成形规律。方法 在保证其他焊接工艺相同的条件下，通过改变焊接速度，比较分析了焊接速度对接头的表面成形、横截面形貌特征、微观结构及力学性能的影响规律。结果 随着焊接速度从118 mm/min减小至95 mm/min时，焊缝表面成形变得更光滑，飞边显著减少，内部孔洞缺陷消失，焊缝成形质量显著提高；但继续减小焊接速度至75 mm/min时，焊缝内部却再次出现孔洞缺陷。结论 采用工艺参数为950 r/min的旋转速度、95 mm/min的焊接速度焊接时，焊缝成形质量最高；中心混合区主要由层片状铜合金、颗粒状镁合金和金属间化合物Mg2Cu组成；接头抗拉强度最大，达81.5 MPa。 |
| 英文摘要: |
| The paper aims to study the formation rule of friction stir welded Mg/Cu dissimilar metal alloy joints produced at different welding speeds. Under the condition of keeping the same welding process, effects of welding speed on surface formation, cross section, microstructure and mechanical properties of the joints were compared and analyzed by changing welding speed. The results showed that, when the welding speed was decreased from 118 mm/min to 95 mm/min, the weld surface became smoother, the flash reduced significantly and the hole-defect in the weld disappeared, which significantly improved the joint quality. However, the hole-defect formed again in the weld when the welding speed was continuously reduced to 75 mm/min. Meanwhile, the quality of the weld made at rotation speed of 950 r/min and welding speed of 95 mm/min is the best. The middle mixed area is comprised of layered copper alloy, granular magnesium alloy and intermetallic compound of Mg2Cu. Also, the tensile strength of the joint is the highest, and which can reach 81.5 MPa. |
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