电磁场对1100铝合金铸轧板材组织的影响

Effect of Electromagnetic Field on Microstructure of 1100 Aluminum Alloy Sheet During Roll Casting

研究了1100铝合金中添加不同质量分数(0.4%,0.2%,0.1%)的Al-Ti-B细化剂和在铸轧过程中施加电磁振荡场对铸轧板坯组织细化的影响.结果发现,在添加相同含量的Al-Ti-B条件下,铸轧过程中施加电磁振荡场的板坯组织细化效果明显高于普通铸轧的板坯.同时发现,细化剂的质量分数在0.1%~0.4%范围内,在铸轧过程中施加电磁振荡场,其细化效果都比较满意,其显微组织优于常规铸轧添加0.4%细化剂的组织,因此,电磁振荡铸轧可以大幅度降低细化剂的用量,减少元素偏析,改善铸轧坯的内部质量.

When adding different amount of Al- Ti-B refiner（0. 4%,0. 2% and 0. 1% ） in the 1100 aluminum alloy sheet, the effects of electromagnetic oscillating field on refining microstructure of the sheet during roll casting were investigated. The results show that the refining effects on the microstructure of the roll-casted sheet were significant after applying electromagnetic oscillating field compared with that in the traditional roll-casted one. Also, when the refiner content was within the scope of 0. 1% to 0. 4%, the refining effect of electromagnetic field was prominent and the refining microstructure was superior to that in the traditional roll-casted one with adding 0. 4% refiner. Therefore, the electromagnetic vibration roll casting process can decrease the amount of the refiner greatly, reduce element segregation and improve internal quality in a roll-casted billet.