均匀化处理对3104铝合金晶粒内析出行为的影响  

Effect of Homogenization Treatment on Precipitation Behavior in Grain Interior of 3104 Aluminium Alloy

作　　者：罗旭东 LUO Xudong(Tianjin Zhongwang Aluminium Co.,Ltd.,Tianjin 301700,China)

机构地区：[1]天津忠旺铝业有限公司,天津301700

出　　处：《热加工工艺》2022年第16期143-148,共6页Hot Working Technology

摘　　要：利用热分析仪、光学显微镜、扫描电镜和能谱仪考察了均匀化过程中3104铝合金晶粒内的析出行为。结果表明,在均匀化温度为300℃时,3104铝合金晶粒内没有明显的析出相。在350℃时,3104铝合金在晶粒内有短棒状的Mg_(2)Si析出,其数量随保温时间延长而增加。在400~500℃,Mg 2Si析出相的尺寸明显大于350℃时的。500℃保温超过5 h后,Mg_(2)Si基本完全溶解。当均匀化温度提高到560℃并保温10 h时,3104铝合金晶粒内析出颗粒状Al MnSi相,温度达到630℃时3104铝合金晶粒内的Al MnSi相基本完全溶解。考虑生产成本等多方面因素,将3104铝合金的均匀化温度选择在560~620℃,保温时间为10 h左右较为合理。The precipitation behavior in grain interior of 3104 aluminium alloy during homogenization was investigated by thermal analyzer,optical microscope,scanning electron microscope and energy dispersive spectrometer.The results show that,there is no obvious precipitates in the grain interior of 3104 aluminium alloy when the homogenization temperature is 300℃.At 350℃,the 3104 aluminum alloy has a short rod-shaped Mg_(2)Si precipitate within the crystal.The number increases with the extended insulation time.At 400-500℃,the Mg_(2)Si precipitated phase size is significantly larger than that of 350℃.After holding at 500℃for more than 5 h,Mg_(2)Si is basically completely dissolved.The granular Al MnSi phase is precipitated in 3104 aluminum alloy grain when the homogenization temperature is raised to 560℃and held for 10 h.When the temperature reaches 630℃,the Al MnSi phase in 3104 aluminum alloy grain at 630℃is basically completely dissolved.Considering various factors such as production cost,it is reasonable to choose the uniform temperature of 3104 aluminum alloy at 560-620℃,and the insulation time is about 10 h.

关 键 词：均匀化 3104铝合金 析出 溶解 

分 类 号：TG166.3[金属学及工艺—热处理]