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研究了Al-0.2Sc-0.04Zr(0.01B)合金的时效行为和导电性。发现合金最佳时效温度为330℃,最佳时效时间为189min。热挤压并不能进一步提高合金的最佳强度水平,但能大幅提高合金的伸长率;添加B虽使合金最佳时效强度水平略有降低,但能改善均匀化状态合金的低温导电性。综合结果表明,挤压态Al-0.2Sc-0.04Zr合金具有最佳的力学性能和导电性,其抗拉强度为160MPa,20℃时导电性相当于国际标准软铜的63%。
The aging behavior and electrical conductivity of Al-0.2Sc-0.04Zr (0.01B) alloy were studied. The optimum aging temperature of alloy was found to be 330 ℃, and the best aging time was 189min. Hot extrusion does not further improve the alloy’s optimal strength, but it can greatly improve the elongation of the alloy. Although B slightly decreases the optimum aging strength of the alloy, it can improve the low-temperature conductivity of the homogenized alloy. The comprehensive results show that the extruded Al-0.2Sc-0.04Zr alloy has the best mechanical properties and electrical conductivity, the tensile strength is 160MPa, and the electrical conductivity at 20 ℃ is equivalent to 63% of the international standard soft copper.