(1. 中南大学 粉末冶金国家重点实验室，长沙 410083；
2. 莱芜钢铁集团粉末冶金有限公司，莱芜 271105)
摘 要: 以Cu-0.15%(质量分数)Al合金粉末为原料、Cu2O为氧化剂，采用内氧化−冷轧法制备Al2O3弥散强化铜合金，研究合金的组织与性能。结果表明：由内氧化−冷轧法制备的合金的σb＞520 MPa、σ0.2/σb＞90%、电导率(IACS)也保持在80%以上；经950 ℃退火后，合金的σb＞400 MPa；此合金具有高强、高导和优良的抗高温软化性能；冷轧态弥散强化铜合金的组织呈拉长变形的纤维状，试样断口分布有一定数量的韧窝；经950 ℃退火后，合金的纤维组织宽化，试样断口表面韧窝增多、变深，塑性提高。
关键字: 铜合金；弥散强化铜合金；内氧化；冷轧
copper alloys prepared by internal oxidation and cold rolling
（1. State Key Laboratory for Powder Metallurgy, Central South University，Changsha, 410083, China;
2. Laiwu Iron & Steel Group Powder Metallurgy Co., Ltd., Laiwu 271105, China）
Abstract:With Cu-0.15%Al alloy powder and Cu2O powder as oxidant, alumina dispersion strengthened copper (ADSC) alloys were prepared by internal oxidation and cold rolling method. The properties and microstructures of those alloys were investigated. The results indicate that, σb values of the ADSC alloys are higher than 520 MPa; σ0.2/σb and relative conductivities of those alloys are more than 90% and 80% (IACS), respectively. Even after being annealed at 950 ℃, σb values of the alloys are more than 400 MPa. Those alloys have properties of high strength and high conductivity and possess appreciable ability to resist softening at higher temperature. The cold-rolled alloys show very fine, highly elongated fiber morphology; there are a certain amount of dimples in the fracture surface of the alloys. After being annealed at 950 ℃, those alloys show widened fiber morphology, increased amount of deepened dimples, resulting in improved tensile ductility.
Key words: copper alloys; dispersion strengthened copper alloys; internal oxidation; cold rolling
