Heat Treatment of Modified 6005A Alloy for Vehicles

摘要

Modified 6005A alloy was reported and its mechanical properties were studied by tensile test, hardness measurement and TEM analysis. Results show that the favorable aging condition for 6005A is 175℃for 8h, and the nose temperature of its TTP (Time-temperature-properties) curves is about 370℃. In a moderate temperature zone (270℃ < T < 390℃), the alloy has much high quench sensitivity. Therefore, in on-line extrusion, water spray quench and moderate temperature should be taken to enhance quench rate, then 6005A alloy can be quench hardened and its quenching distortion can be reduced.