充氧压铸.pdfVIP

生产技术 特种铸造及有色合金　1996年第 3 期 充　氧　压　铸 五二研究所宁波分所　汪之清 摘　要　充氧压铸可消除压铸件的气孔, 使压铸件可以热处理或焊接。铸态铝合金充氧压铸件的力学性能有明显改进: 拉 伸强度增加了30% , 延伸率增加了150%～ 200% , 经热处理后, 拉伸强度可增加30% , 屈服强度可增加100% , 冲击韧性可提 高100% 或更多。充氧压铸已在铝合金、镁合金压铸件的生产中得到应用, 如车轮、制动器缸体、液压传动阀体以及热交换器 等。充氧压铸的 12 铝合金车轮经 热处理后, 其 = 275 , = 221 , = 7. 0% , 其疲劳寿命与轧制的 A l Si CuFe T M Pa M Pa 6 b s 5454铝合金轮子的疲劳寿命相似。 关键词: 充氧压铸　铝合金　镁合金 - Pore Free D ie Ca sting Wang Zh iq ing (N ingbo Branch, No52 Research In stitute) 　 , , ABSTRACT U sing pore free die casting the castings w ith porosity free heat treatable and w eldable fea tures are given. M echanical p roperties of A l casting are imp roved significantly: T ensile strength and elonga 30% 150%～ 200% . , tion as cast are increased by and separately T ensile strength yield strength and impact 30% , 100% 100% . toughness by heat treatm ent are increased by and more than separately M any A l or M g alloy die castings, such as the auto w heel, the brake cylinder, the hydraulic valve, the actuator body and the , . 6, 1 heat exchanger have been p roduced Being m ade in pore free die casting and heat treated by T A l Si 2