铸造技术2025，Vol.46Issue(11)：1107-1118,12.DOI:10.16410/j.issn1000-8365.2025.5057
2B06/7B04异种铝合金回填式搅拌摩擦点焊工艺及接头断裂模式研究
Investigation of Process and Joint Fracture Modes in Refill Friction Stir Spot Welding of Dissimilar 2B06/7B04 Aluminium Alloys
摘要
Abstract
Refill friction stir spot welding(RFSSW)has demonstrated broad application prospects in the field of lightweight,high-strength aluminium alloys because of its advantages of high efficiency and superior quality.However,studies on RFSSW for dissimilar materials have not been sufficiently conducted,and a comprehensive evaluation system for joint quality is still lacking.This study focused on the dissimilar combination of 2B06/7B04 high-strength aluminium alloys.Through systematic RFSSW process experiments,relationships between the welding parameters and joint morphology characteristics,microhardness distribution,and tensile-shear properties were established,ultimately achieving process optimization.The optimal process parameters obtained by fitting the regression equation are as follows:rotational speed,1 600 r/min;press volume,1.47 mm;press rate,60 mm/min;and refill rate,60 mm/min.The corresponding joint tensile-shear failure load is 5.22 kN.The analysis of tensile-shear fracture morphology reveals that the joints exhibit two fracture modes,plug-type fracture and mixed-mode fracture,whereby the failure load of plug-type fracture was lower than that of mixed-mode fracture.关键词
铝合金/异种材料/回填式搅拌摩擦点焊/焊接工艺/断裂模式Key words
aluminium alloy/dissimilar materials/refill friction stir spot welding/welding process/fracture mode分类
矿业与冶金引用本文复制引用
曹翰墨,祖韵迪,熊江涛,张达,郭伟,李京龙..2B06/7B04异种铝合金回填式搅拌摩擦点焊工艺及接头断裂模式研究[J].铸造技术,2025,46(11):1107-1118,12.基金项目
国家自然科学基金面上项目(52475404) （52475404）
陕西省稀有金属装备制造共性技术研发平台(2024ZG-GXPT-02) （2024ZG-GXPT-02）
