CAJ | 학술논문

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。
채용자주연발적량상구련주기술제비Cu?4.7%Sn합금판재，연구량상구련주공예삼수여Cu?4.7%Sn합금판재표면질량적관계，분석합금판재적미관조직급역학성능。결과표명，통과합리필배량상구주형입구온도화랍주속도，가이제비득도표면광활적 Cu?4.7%Sn 합금판재，기미관조직유정포정조직、구유자봉폐정계적소정립、주상정급등축정구성。여랭형련주 Cu?4.7%Sn 합금판재상비，량상구련주합금판재적실온항랍강도화신장솔현저제고。
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.