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采用3种不同的制备方法,制备了电线电缆Al-Cu-Fe-Sr新型耐热铝合金,并进行了显微组织、力学性能的测试与分析。结果表明,与常规铸造相比,机械振动辅助浇注法和机械振动双重辅助法有助于细化晶粒,消除孔洞等缺陷,提高合金的力学性能;尤其是机械振动双重辅助法的合金力学性能改善效果更为明显。与常规铸造法相比,机械振动双重辅助法可使合金的平均晶粒尺寸减小75%、抗拉强度提高34%、屈服强度提高62%、断后伸长率增加87%。电线电缆Al-Cu-Fe-Sr新型耐热铝合金的制备方法优选为机械振动双重辅助法。
Al-Cu-Fe-Sr, a new heat-resistant aluminum alloy for wire and cable, was prepared by three different preparation methods. The microstructure and mechanical properties of the Al-Cu-Fe-Sr alloy were tested and analyzed. The results show that compared with the conventional casting, mechanical vibration assisted casting method and double vibration assisted mechanical vibration method can help to refine the grains and eliminate defects such as cavities, and improve the mechanical properties of the alloy; especially, the mechanical properties of the dual vibration assisted mechanical vibration Improve the effect even more apparent. Compared with the conventional casting method, the double vibration assisted mechanical vibration method can reduce the average grain size of the alloy by 75%, increase the tensile strength by 34%, yield strength by 62% and increase the elongation after fracture by 87%. Wire and cable Al-Cu-Fe-Sr Preparation of new heat-resistant aluminum alloy is preferably double vibration assisted mechanical vibration method.