ER5356铝合金焊丝力学性能与PLC效应分析  

Portevin-Le Chatelier effect and mechanical properties of 5356 aluminum alloy welding wires

作　　者：路全彬[1] 龙伟民[1] 钟素娟[1] 杜全斌[1] 

机构地区：[1]郑州机械研究所新型钎焊材料与技术国家重点实验室,450001

出　　处：《焊接》2016年第9期40-42,共3页Welding & Joining

摘　　要：对冷变形态ER5356铝合金焊丝进行不同的退火工艺处理,采用室温拉伸试验研究了退火工艺对铝合金焊丝力学性能和PLC效应的影响。结果表明,中间退火时间为1 h时,退火温度由300℃升高到400℃,铝合金焊丝PLC效应减弱,当经过350℃×1 h退火时,冷拔铝合金焊丝抗拉强度为316 MPa,断后伸长率为22%,PLC效应相对较弱;低温退火温度大于200℃时,成品焊丝会出现反常PLC效应,造成塑性变形不均匀,当经（100~200）℃×1 h的低温退火时,成品焊丝残余应力降低,强度塑性匹配良好。Tensile test at room temperature was used to study the Portevin-Le Chatelier effect and mechanical properties of ER5356 aluminum alloy welding wires under different heat treatment for cold deformation state.The results show that with increasing the intermediate annealing temperature from 300 ℃ to 400 ℃,the PLC effect of the alloy for 1h is weakened.When the intermediate annealing process is 350 ℃ × 1 h,tensile strength and elongation strain of the alloy is 316 MPa and 22%.With increasing the low temperature annealing temperature over 200℃,the phenomenon of inverse PLC appears for the finished alloy wires.When the low temperature annealing process is(100 ~ 200) ℃ × 1 h,tensile strength and elongation strain of the alloy wires matches well and residual stress of the alloy wires is reduced.

关 键 词：PLC效应 铝合金焊丝 中间退火 低温退火 

分 类 号：TG422[金属学及工艺—焊接]