High pressure die cast (HPDC) aluminum alloy heat treatment for improved rivetability

The invention provides a high pressure die cast (HPDC) aluminum alloy heat treatment for improved rivetability. A method of treating a high pressure die cast (HPDC) material to improve rivetability isprovided. The method includes exposing the HPDC material to a temperature between 300 DEG C. and 450 DEG C. for a time period between 10 minutes and 5 hours in a heat treatment step. In this method,the heat treatment results in eutectic silicon spheroidization of the HPDC material such that the HPDC material does not crack after rivet installation. The method further includes the step of exposing the HPDC material to a subsequent heat treatment step at about 180 DEG C. for about 30 minutes after quenching. Moreover, the quenching may be a forced air quench for a period of 6 DEG C./s. 本公开提供了"用于实现改善的铆接能力的高压模铸(HPDC)铝合金热处理"。提供了一种处理高压模铸(HPDC)材料以改善铆接能力的方法。所述方法包括在热处理步骤中将所述HPDC材料暴露于在300℃与450℃之间的温度达在10分钟与5小时之间的时间段。在该方法中，所述热处理导致所述HPDC材料的共晶硅球化，使得所述HPDC材料在铆钉安装后不会破裂。所述方法还包括在淬火后将所述HPDC材料暴露于约180℃的后续热处理步骤约30分钟的步骤。此外，所述淬火可以是以6℃/s