化学成分和浇注温度对7A04合金铸造性能的影响  

Effect of Composition and Pouring Temperature on Casting Properties of 7A04 Aluminum Alloy

作　　者：胡增武 宗福春 HU Zeng-wu;ZONG Fu-Chun(Nonferrous Metallic of He Bei Li Zhong Group Co.,Ltd.,Baoding 071000,Hebei,China)

机构地区：[1]河北新立中有色金属集团有限公司,河北保定071000

出　　处：《铸造》2023年第3期270-274,共5页Foundry

摘　　要：采用水平直棒流动性金属型模具、临界长度法热裂模具、Tatur Test锥形模具分析研究了Mg、Zn、Cu、Ti合金元素和浇注温度对7A04合金铸造性能影响。结果表明:Mg含量提高后,合金流动指数降低、收缩率变大,Mg含量增加到1.01%时,热裂倾向增加,Mg含量继续增加到2.64%,热裂倾向变小;Zn含量提高后,流动性指数增加,收缩率变小,热烈倾向减小;Cu含量提高后,流动指数大幅提高,收缩率增加,热裂倾向减小;Ti含量提高后,流动指数和收缩率均有所提高,热烈倾向明显减小,当Ti含量由0.131%增加到0.20%时,铸造性能变化幅度减小。温度为720℃时,是热裂指数变化转折点。The effects of Mg,Zn,Cu,Ti alloy elements and pouring temperature on casting properties of 7A04 alloy were studied by using metal type fluidity mold,critical length hot cracking mold and tatur test conical mold.The results showed that the fluidity decreases and shrinkage increases with the content of Mg increase,when the Mg content increases to 1.01%,the hot cracking tendency increases,but the Mg content continues to increase to 2.64%,the hot cracking tendency decreases.With the increase of Zn content,the fluidity increase,the shrinkage rate decreases,and the hot cracking tendency decreased.With the increase of Cu,the fluidity and shrinkage increases,the hot cracking tendency decreases.With the increase of Ti content,fluidity and shrinkage increases,and hot cracking tendency decreased significantly,but the Ti content continues to increase to 0.20%,the change range of casting property is reduced.When the temperature is 720℃,there is a turning point in the change of thermal cracking index.

关 键 词：化学成分 浇注温度 7A04铝合金 铸造性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]