低频电磁水平连铸新型超高强铝合金  

New Super-high Strength Aluminum Alloy in Low-frequency Electromagnetic Horizontal Continuous Casting

作　　者：左玉波[1] 崔建忠[1] 赵志浩[1] 李念奎[1] 王洋[1] 朱庆丰[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室

出　　处：《特种铸造及有色合金》2007年第9期706-708,共3页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2005CB623707)

摘　　要：在水平连铸过程中施加低频交变磁场,制备新型超高强铝合金铸锭,利用金相分析方法研究电磁场对铸锭质量的影响。结果表明,电磁场能提高铸锭表面质量,减少宏观偏析,细化宏观和微观组织。低频电磁水平连铸新型超高强铝合金铸锭经过挤压和热处理后屈服强度为742MPa,抗拉强度为758MPa,伸长率为8.5%。New super-high strength Al alloy ingot was fabricated by horizontal continuous casting with low frequency alternative electromagnetic field. Effects of electromagnetic field on quality of aluminum alloy ingot were observed by the metallography method. The results reveal that electromagnetic field can improve the quality of the ingot through reducing macro-segregation and refining micro-macro structure. The yield strength, tensile strength and elongation of the LFEHC new super-high aluminum alloy reach 742 MPa, 758 MPa and 8.5%, respectively, after heat treatment based on squeezing casting.

关 键 词：低频电磁场 水平连铸 超高强铝合金 微观组织 宏观组织 宏观偏析 

分 类 号：TG249.7[金属学及工艺—铸造]