金属学报  1982, Vol. 18 Issue (6): 661-670

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冷却速度和变质剂添加浓度对Al-Si共晶合金变质作用的影响

郑朝贵;姚连克;张启运

北京大学化学系;北京大学化学系;北京大学化学系

EFFECTS OF COOLING RATE AND MODIFIER CONCENTRATION ON MODIFICATION OF Al-Si EUTECTIC ALLOYS

Zheng Chaogui; Yao Lianke; Zhang Qiyun (Department of Chemistry; Beijing University)

郑朝贵;姚连克;张启运. 冷却速度和变质剂添加浓度对Al-Si共晶合金变质作用的影响[J]. 金属学报, 1982, 18(6): 661-670.
, , . EFFECTS OF COOLING RATE AND MODIFIER CONCENTRATION ON MODIFICATION OF Al-Si EUTECTIC ALLOYS[J]. Acta Metall Sin, 1982, 18(6): 661-670.

摘要 参考文献 相关文章 Metrics 全文: PDF(4092 KB)   摘要: 借助显微结构法系统地研究了Li,Na,K,Mg,Ca,Sr,Ba,La,Sm,Y,Sb和Bi等12个微量元素对Al-Si共晶合金的变质作用。考祭了各变质剂在不同冷却速度下的变质浓度范围以及在添加变质剂浓度相同时,不同冷却速度对Al-Si共晶合金显微结构的影响,发现各种变质元素对Al-Si合金变质时均具有一变质临界冷却速度v_c。冷却速度低于此值时,任何浓度的变质剂均不能引起合金的变质。变质剂的v_c值愈低,变质能力愈强。其中以Na、K、Sr和La变质能力最强,其v_c值均低于40℃/min。据此认为v_c可作为评价变质剂变质能力的定量标准。 Abstract：The effect of 12 elements such as Li, Na, K, Mg, Ca, Sr, Ba, La, Sm, Y, Sb and Bi on the modification of the Al-Si eutectic alloys was systematically investigated by means of their microstructure observations. The range of modifying concentration for each modifier under various cooling rates was detected and their effects on microstructures of Al-Si eutectic alloys with same modifier concentration but varied cooling rates were also studied. A critical cooling rate, v_c, of modification is always presented for each own modifier. The modification does not occur at a lower cooling rate than v_c with whatever the concentration of the modifier. The lower the v_c of a modifier, the stronger will be its modifying ability. Among these modifiers studied, the modifying abilities of Na, K, Sr and La with their v_c values lower than 40℃/min are the strongest. It seems to be suggested that v_c is available for a quantitative scale of the modifying ability assessment of a modifier. 收稿日期: 1982-06-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 郑朝贵 姚连克 张启运 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1982/V18/I6/661 1 Pacz, D., U. S. Pat., 1 387 900,(1921) . 2 Mondolfo, L. F., Aluminum Alloys: Structure and Properties, Butterworth, London, 1976, p. 677． 3 张启运;郑朝贵;韩万书,金属学报,17(1981) ,130． 4 Edwards, J. D.; Frary, F. C.; Churchill, H. D., U. S. Pat., №. 1 410 461,(1920) . 5 Gwyer, A. G. C.; Phillips, H. W. L., J. Inst. Met., 36(1926) , 283． 6 Kim, C. B.; Heine, R. W., J. Inst Met., 92(1963-64) , 367． 7 Pillai, N. R.; Anantharaman, T. R., Trans. Metall. Soc. AIME, 242(1968) , 2025． 8 Day, M. G.; Hellawell, A., Proc. R. Soc., A305(1968) , 473．= No related articles found! Viewed Full text Abstract Cited   Shared      Discussed