均匀化处理对6061铝合金显微组织及相演变行为的影响

doi:10.13251/j.issn.0254-6051.2023.05.030

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 196-203.DOI: 10.13251/j.issn.0254-6051.2023.05.030

均匀化处理对6061铝合金显微组织及相演变行为的影响

程志远^1,2, 王经涛^1,2, 郭丰佳^1,2, 孙宁^1,2, 于继海¹

1.山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心, 山东龙口 265713;
2.山东南山科学技术研究院有限公司有色金属产业研究院, 山东龙口 265713

收稿日期:2022-11-26 修回日期:2023-03-10 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 王经涛,工程师,硕士,E-mail: wjta0815@163.com.cn
作者简介:程志远(1978—),男,工程师,主要研究方向为铝合金加工及热处理,E-mail: chengzhiyuan@nanshang.com.cn。

Effect of homogenization treatment on microstructure and phase evolution behavior of 6061 aluminum alloy

Cheng Zhiyuan^1,2, Wang Jingtao^1,2, Guo Fengjia^1,2, Sun Ning^1,2, Yu Jihai¹

1. National Engineering Research Center for Plastic Working of Aluminium Alloys, Shandong Nanshan Aluminium Co., Ltd., Longkou Shandong 265713, China;
2. Nonferrous Metal Industry Research Institute, Shandong Nanshan Academy of Science and Technology Co., Ltd., Longkou Shandong 265713, China

Received:2022-11-26 Revised:2023-03-10 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 采用OM、SEM、DSC等技术手段研究了6061铝合金板材铸态及均匀化处理后的显微组织,分析了合金在均匀化处理前后析出相粒子转变过程以及晶内成分均匀性的演变规律。结果表明,6061铝合金铸锭经579 ℃×6 h均匀化处理后,合金中低熔点非平衡共晶相发生充分溶解,晶内成分偏析基本消除,合金中残留第二相的含量降低至0.87％,同时针状富铁相发生球化并呈断续分布,合金的均匀化效果优异,为大生产合理热处理工艺的制定提供了参考依据。

关键词: 6061铝合金, 均匀化, 热处理, 显微组织, 析出相粒子

Abstract: Microstructure of 6061 aluminum alloy sheet as-cast and after homogenization treatment was studied by means of OM, SEM and DSC. The transformation process of precipitated phase particles and the evolution law of composition uniformity in the alloy before and after homogenization were analyzed. The results show that after homogenization at 579 ℃ for 6 h, the low melting point non-equilibrium eutectic phase of the alloy is fully dissolved, the segregation of intracrystalline composition is basically eliminated, and the content of the retained second phase in the alloy is as low as 0.87%. Meanwhile, the acicular iron-rich phase is spheroidized and distributed discontinuously, the homogenization effect of the alloy is excellent, which can provide a reference for the formulation of reasonable heat treatment process in large-scale production.

Key words: 6061 aluminum alloy, homogenization, heat treatment, microstructure, precipitated phase particle

中图分类号:

TG146.2

程志远, 王经涛, 郭丰佳, 孙宁, 于继海. 均匀化处理对6061铝合金显微组织及相演变行为的影响[J]. 金属热处理, 2023, 48(5): 196-203.

Cheng Zhiyuan, Wang Jingtao, Guo Fengjia, Sun Ning, Yu Jihai. Effect of homogenization treatment on microstructure and phase evolution behavior of 6061 aluminum alloy[J]. Heat Treatment of Metals, 2023, 48(5): 196-203.

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均匀化处理对6061铝合金显微组织及相演变行为的影响

Effect of homogenization treatment on microstructure and phase evolution behavior of 6061 aluminum alloy

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