Surface quality, microstructure and mechanical properties of Cu-Sn alloy plate prepared by two-phase zone continuous casting  

两相区连铸Cu–Sn合金板材的表面质量和组织性能（英文）

作　　者：刘雪峰[1,2,3] 罗继辉[2] 王晓晨[2] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]北京科技大学材料科学与工程学院,北京100083 [3]北京科技大学现代交通金属材料与加工技术北京实验室,北京100083

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第6期1901-1910,共10页中国有色金属学报（英文版）

基　　金：Project(51374025) supported by the National Natural Science Foundation of China;Project(2014Z-05) supported by the State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,China;Project(2152020) supported by the Beijing Natural Science Foundation,China

摘　　要：Cu-4.7%Sn （mass fraction） alloy plate was prepared by the self-developed two-phase zone continuous casting （TZCC） process. The relationship between process parameters of TZCC and surface quality of the alloy plate was investigated. The microstructure and mechanical properties of the TZCC alloy plate were analyzed. The results show that Cu-4.7%Sn alloy plate with smooth surface can be obtained by means of reasonable matching the entrance temperature of two-phase zone mold and the continuous casting speed. The microstructure of the TZCC alloy is composed of grains-covered grains, small grains with self-closed grain boundaries, columnar grains and equiaxed grains. Compared with cold mold continuous casting Cu-4.7%Sn alloy plate, the room temperature tensile strength and ductility of the TZCC alloy plate are greatly improved.采用自主研发的两相区连铸技术制备Cu-4.7%Sn合金板材,研究两相区连铸工艺参数与Cu-4.7%Sn合金板材表面质量的关系,分析合金板材的微观组织及力学性能。结果表明,通过合理匹配两相区铸型入口温度和拉铸速度,可以制备得到表面光滑的Cu-4.7%Sn合金板材,其微观组织由晶包晶组织、具有自封闭晶界的小晶粒、柱状晶及等轴晶构成。与冷型连铸Cu-4.7%Sn合金板材相比,两相区连铸合金板材的室温抗拉强度和伸长率显著提高。

关 键 词：Cu-Sn alloy plate two-phase zone continuous casting surface quality grains-covered grains microstructure mechanical property 

分 类 号：TG291[金属学及工艺—铸造]