吉林大学学报(工学版) ›› 2024, Vol. 54 ›› Issue (11): 3184-3191.doi: 10.13229/j.cnki.jdxbgxb.20230054
• 材料科学与工程 • 上一篇
2024铝合金双轴肩搅拌摩擦焊接头热循环及组织特征
冯家铖1,2(
),宫文彪1,2,3(),鞠川4,李于朋1,2,孙雨萌1,2,朱芮1,2
- 1.长春工业大学 先进结构材料教育部重点实验室，长春 130012
2.长春工业大学 材料科学与工程学院，长春 130012
3.吉林省泰浩轨道客车装备有限公司，长春 130500
4.枣庄学院，山东 枣庄 277000
Thermal cycle and microstructures characteristic of bobbin tool friction stir welded 2024 aluminum alloy
Jia-cheng FENG1,2(),Wen-biao GONG1,2,3(),Chuan JU4,Yu-peng LI1,2,Yu-meng SUN1,2,Rui ZHU1,2
- 1.Key Laboratory of Advanced Structural Materials，Ministry of Education，Changchun University of Technology，Changchun 130012，China
2.School of Materials Science and Engineering，Changchun University of Technology，Changchun 130012，China
3.Jilin Province Taihao Railway Vehicles Facilities Co. ，Ltd. ，Changchun 130500，China
4.Zaozhuang University，Zaozhuang 277000，China
摘要：
采用双轴肩搅拌摩擦焊（Bobbin tool friction stir welding， BT-FSW）对4 mm厚2024铝合金进行焊接，研究了焊接热循环温度对焊缝组织与性能的影响。结果表明：后退侧峰值温度高于前进侧，温度差约为20 ℃；焊核区平均晶粒尺寸为10.1 μm，后退侧各区域平均晶粒尺寸大于前进侧，小角度晶界占比小于前进侧；焊核区形成了细小的沉淀相S相，热影响区沉淀相数量减少和尺寸的增加导致力学性能下降；接头显微硬度呈“W”型分布，后退侧热机影响区与热影响区交界处硬度值最小，约为72.3 HV。
中图分类号:
- TG453
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