淬火条件及停放时间对B93пч铝合金性能的影响

Influences of Quenching Condition and Delay Time on Properties of B93пч Aluminum Alloy

研究了不同固溶温度和时间、淬火水温、淬火转移时间及淬火后停放时间对B93пч铝合金力学性能和电学性能的影响。结果表明,该合金最佳的固溶处理制度为470℃保温40 min;淬火水温为40℃时,合金锻件能获得较好的强度和塑性配合,且电导率较高;即时淬火效果最好,因淬火转移时间越长,合金性能下降越明显;在室温条件下随着停放时间的延长,合金性能总体呈下降趋势,若停放时间控制在2 h以内或者24 h以上,合金性能稳定,下降不明显。

Effects of various conditions of solution and quench treatment on mechanical properties and conductivity of B93пчaluminum alloys were investigated, which including solution time and temperature, water temperature and transfer time during quench, as well as delay time after quench. It reveals that optimal treatment condition of the alloy is heating at 470 ℃ for 40 minutes. Quenching in water of 40 ℃ brings the alloy good combination of strength and plasticity, and also high conductivity. Though the best quenching effect, properties of alloy will decrease with the increase of transfer time. Moreover, at room temperature the strength of alloy is on a downward trend with the increase of delay time after quench expands, and the properties is relatively stable when aging treatment is carried out within 2 hours or more than 24 hours after quench.