以纯铝和氧化铜粉末为原料,运用热等静压原位合成技术,制备了粉末冶金铝铜合金(Al-4.5%Cu).研究了固溶和时效工艺对其组织和性能的影响,并分析讨论其作用机理.结果表明,粉末冶金法制备的铝铜合金组织均匀、致密,固溶+时效处理使合金硬度、强度明显提高,塑性和韧性略有下降.经过550℃×11 h固溶+150℃×46 h时效处理,合金的维氏硬度HV为1300MPa,抗拉强度σb为328 MPa,冲击韧性αk为72.85 kJ·m-2,伸长率δ为6.63%.
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