论文部分内容阅读
对新装备材料7A53铝合金采用先进的专家系统控制的脉冲MIG焊工艺,得到焊接接头,研究了不同时效方法对其焊接接头力学性能的影响并分析了原因。结果表明,人工时效后,抗拉强度(σb)约为母材的83%,屈服强度(σ0.2)约为78%;自然时效后,σb为母材的78%,σ0.2达75%;两种时效工艺获得强度均超过产品相关标准指标。人工时效最佳的时效温度为150℃;自然时效当超过35d后性能趋于稳定。
The new material 7A53 aluminum alloy using advanced expert system controlled pulsed MIG welding process to obtain the welded joints, the effect of different aging methods on the mechanical properties of welded joints and analysis of the reasons. The results showed that after artificial aging, the tensile strength (σb) was about 83% of the base metal and the yield strength (σ0.2) was about 78%. After natural aging, σb was 78% of the base metal and σ0.2 was 75 %; Two kinds of aging process have exceeded the strength of the relevant standard indicators. Artificial aging the best aging temperature of 150 ℃; natural aging when more than 35d performance tends to be stable.