中文摘要：

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。

英文摘要：

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.