摘要
针对低碳镀锌钢板与6061铝合金CMT熔钎焊接头熔合面积对其抗剪强度和破坏模式的影响进行研究。结果表明:熔钎焊过程中,随着焊枪相对于搭接接头中心线偏移量的增大,接头的熔合面积逐渐减小,润湿角增大,进而导致接头的抗剪强度逐渐减小,接头的断裂位置由铝熔合区破坏向钢/铝界面层破坏转变。根据实验结果,考虑界面层的失效判据,建立CMT接头拉剪过程的数值模型,讨论熔合面积影响接头抗剪强度及破坏模式的原因。
Effect of bonded area on shear strength and failure mode of galvanized low carbon steel/6061 Al alloy CMT brazed joint was studied.The results show that,with the increasing welding torch offset the bonded area of CMT joint decreases and the wetting angle increases.That leds to the decreasing of shear strength,and the joint failure position transferring from fused Al area to steel/aluminum interface layer.Based on the experimental results,a numerical model of lap-shear process of CMT joint considering the failure criterion of interface layer is established.The reason of bonded area influencing shear strength and failure mode of CMT joint is discussed.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2014年第4期34-39,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51005004,51275006)
北京市自然科学基金资助项目(3132006)
高等学校博士学科点专项科研基金资助项目(20101103120023)
关键词
熔合面积
抗剪强度
钢
铝接头
焊枪偏移量
冷金属过渡焊
bonded area
shear strength
steel/Al joint
torch offset
cold metal transfer welding
