铸造参数对半连续铸造7050铝合金板坯质量影响.pdfVIP

学兔兔 Ju1．2oo9 · 666 · Vo1．58 N0．7 铸造参数对半连续铸造7O5O铝合金板坯质量的影响 冯亚利 ，李廷举 ，张永安 ，王同敏 ，刘 鼎 ，孙 迪 ，罗大伟 ，曹志强 (1．大连理工大学铸造工程研究中心，辽宁大连116024；2．北京有色金属研究总院，北京 100088) 摘要：从铸造速度、铸造温度、冷却水量、合金成分以及铸造液位高度几个方面着手，系统研究了铸造工艺参数对电 磁半连续铸造7050~合金板坯质量的影响，并深入分析了影响机理，摸索出了行之有效的铸造工艺参数。最佳工艺参 数为：铸造速度85ram／rain，铸造温度710℃，冷却水流量3m3／h，输入电流2 500A，频率1 700Hz，金属液面高度控制 在石墨结晶器高度的1／2处。采用该工艺参数，成功铸造出尺寸为420mmx130mmx1 000 rain的7050铝合金板坯。 关键词：电磁半连续铸造；7050铝合金板坯；工艺参数 中图分类号：TG146．2 1文献标识码：A 文章编号：1001—4977(2009)07—0666—05 Effect of Casting Process Parameters on Quality of 7050 AIuminum Alloy Slab by Semi—Continuous Casting FENG Ya—li，LI Ting-ju’，ZHANG Yong-an ，WANG Tong—min’，LIU Ding’，SUN Di’， LUO Da—wei’，CAO Zhi—qiang’ (1．Research Center of Foundry Engineering，Dalian University of Technology，Dalian 1 1 6024 Liaoning，China；2．General Research Institute for Nonferrous Metals，Beijing 1 00088，China) Abstract：The systematical study was carried out to investigate the effect of casting speed，casting temperature。cooling water，alloy composition and the height of liquid leveI on the quality of 7050 aluminum alloy slab by electromagnetic semi—continuous casting。and the influencing mechanism was also analyzed deeply．At Iast．the optimal casting process parameters were obtained：casting speed 85 mm，min。pouring temperature 71 0℃ ，flow rate of cooling water 3 m31h，input current 2 500 A， frequency 1 700 Hz．and the Iiquid surface retaining at the half height of the graphite crystallizer．A slab with the size of 420 mmxl 30 mm×1 000 mm has been successfully cast with the above parameters． Key word