挤压态AZ31镁合金恒温超塑性固态焊接研究
发布时间：2019-02-13 05:19
【摘要】：对AZ31镁合金进行了恒温超塑性压缩和恒温超塑性固态焊接试验,研究了AZ31镁合金在大气环境下恒温超塑性固态焊接可行的工艺参数。结果表明:温度对恒温超塑性固态焊接接头强度影响较大,时间的影响其次,应变速率的影响相对较小。恒温超塑性固态焊接过程中组织发生了动态再结晶,并能在更省能源、省时间的条件下,达到与扩散焊相当的接头剪切强度。在预压应力30 MPa、焊接温度450℃、应变速率为1×10~(-4) s~(-1)的条件下,经13 min压接,可实现AZ31镁合金的超塑性连接,剪切强度达到42.08 MPa。
[Abstract]:Constant temperature superplastic compression and constant temperature superplastic solid state welding experiments were carried out on AZ31 magnesium alloy. The feasible process parameters of AZ31 magnesium alloy in atmospheric environment were studied. The results show that the influence of temperature on the strength of superplastic solid-state welded joints at constant temperature is greater than that of time and the effect of strain rate is relatively small. Dynamic recrystallization occurs in the process of superplastic solid-state welding at constant temperature, and the shear strength of the joint can reach the equivalent of diffusion welding under the condition of saving energy and time. Under the condition of pre-compression stress 30 MPa, welding temperature 450 鈩，
本文编号：2421218
[Abstract]:Constant temperature superplastic compression and constant temperature superplastic solid state welding experiments were carried out on AZ31 magnesium alloy. The feasible process parameters of AZ31 magnesium alloy in atmospheric environment were studied. The results show that the influence of temperature on the strength of superplastic solid-state welded joints at constant temperature is greater than that of time and the effect of strain rate is relatively small. Dynamic recrystallization occurs in the process of superplastic solid-state welding at constant temperature, and the shear strength of the joint can reach the equivalent of diffusion welding under the condition of saving energy and time. Under the condition of pre-compression stress 30 MPa, welding temperature 450 鈩，
本文编号：2421218
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