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高硅1235铝箔(Si含量为0.13％～0.14％)坯料由于Si含量增加,铸轧坯料中能形成较多有利的第二相αc-AlFeSi和βP-AlFeSi相,但同时使得其抗拉强度提高,不利后续加工.通过对第二相和性能分析,最佳的高硅1235铝箔坯料退火工艺为:530℃×4h,空冷.在该工艺条件下铸轧态的αc-AlFeSi得以保留,但尺寸有所增大,形貌转为以短棒状、颗粒状为主;同时,高硅1235铝箔坯料的抗拉强度比低Si铝箔坯料降低了6.05％;成品高硅1235铝箔的抗拉强度比低Si铝箔提高了7.55％,伸长率提高了84.15％.“,”The contents of favorable phases like α c-AlFeSi and βP-AlFeSi are increased by increasing the element Si content in 1235 aluminum alloy,and tensile strength of the alloy is improved simultaneously.By analysis of the second phases and properties,the optimal annealing process of high silicon 1235 aluminum (Si content by 13％ ～14％) is 530 ℃ ×4 h with natural cooling.The αc-AlFeSi phase in 1235 aluminum alloy is optimized with slight increase of size and short-rod structure.The tensile strength is declined by 6.05％ compared to that of low silicon content.Compared to the end product of low silicon 1235 aluminum,the tensile strength and elongation of that with high silicon are improved by 7.55％ and 84.15 ％,respectively.