等温温度对轧制SIMA法制备7075合金半固态显微组织的影响

doi:10.13251/j.issn.0254-6051.2022.02.029

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 164-167.DOI: 10.13251/j.issn.0254-6051.2022.02.029

等温温度对轧制SIMA法制备7075合金半固态显微组织的影响

禹鑫磊, 郑小平, 曹通, 田亚强, 陈连生

华北理工大学冶金与能源学院, 河北唐山 063210

收稿日期:2021-09-16 修回日期:2021-11-13 出版日期:2022-02-25 发布日期:2022-04-01
通讯作者: 郑小平,副教授, E-mail: zhengxp1978@163.com
作者简介:禹鑫磊(1995—),男,硕士研究生,主要研究方向为双金属复合材料、半固态金属成形,E-mail: 15733181615@163.com。
基金资助:
河北自然科学基金(E2017209121);河北省高等学校科学技术研究项目(ZD2018242)

Effect of isothermal temperature on semi-solid microstructure of 7075 aluminum alloy prepared by rolling SIMA method

Yu Xinlei, Zheng Xiaoping, Cao Tong, Tian Yaqiang, Chen Liansheng

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China

Received:2021-09-16 Revised:2021-11-13 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 分别采用以同步轧制和异步轧制为预变形方式的应变熔化激活法(SIMA)制备7075铝合金半固态坯料,研究了辊径比和等温保温温度对预变形板材热处理过程中组织演变的影响。结果表明:随等温温度的升高,初生固相晶粒内生成大量液相,固相晶间冷却后出现大量共晶相。在相同的热处理条件下,异步轧制预变形工艺能够比同步轧制预变形工艺获得更多液相,且半固态进程更迅速;获得半固态坯料的优化工艺条件为异步轧制作预变形、等温温度选择610 ℃。

关键词: 轧制, 7075铝合金, 半固态热处理, 等温温度, 显微组织

Abstract: 7075 aluminum alloy semi-solid billets were prepared by strain induced melting activation(SIMA) method with pre-deformation modes of synchronous rolling and asynchronous rolling respectively. The effects of roll diameter ratio and isothermal temperature on microstructure evolution of pre-deformed sheet during heat treatment were studied. The results show that with the increase of isothermal temperature,a large amount of liquid phase are formed in the primary solid phase, and a large number of eutectic phases appear after solid inter-granular cooling. Under the same heat treatment conditions, the pre-deformation process of asynchronous rolling can produce more liquid phase and the semi-solid process is faster than the pre-deformation process of synchronous rolling. The optimum process conditions for obtaining semi-solid billets are asynchronous rolling pre-deformation and isothermal temperature of 610 ℃.

Key words: rolling process, 7075 aluminum alloy, semi-solid heat treatment, isothermal temperature, microstructure

中图分类号:

禹鑫磊, 郑小平, 曹通, 田亚强, 陈连生. 等温温度对轧制SIMA法制备7075合金半固态显微组织的影响[J]. 金属热处理, 2022, 47(2): 164-167.

Yu Xinlei, Zheng Xiaoping, Cao Tong, Tian Yaqiang, Chen Liansheng. Effect of isothermal temperature on semi-solid microstructure of 7075 aluminum alloy prepared by rolling SIMA method[J]. Heat Treatment of Metals, 2022, 47(2): 164-167.

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等温温度对轧制SIMA法制备7075合金半固态显微组织的影响

Effect of isothermal temperature on semi-solid microstructure of 7075 aluminum alloy prepared by rolling SIMA method

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