Influence of Homogenization Treatment on Microstructure and Hardness of Nano TiN Refined Al-Zn-Mg-Cu Aluminum Alloy

Xiao Yating; Cai Qizhou; Li Xinwei; Sun Jialu; Zhao Bingyi; Li Bing

doi:10.15980/j.tzzz.2016.10.029

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Influence of Homogenization Treatment on Microstructure and Hardness of Nano TiN Refined Al-Zn-Mg-Cu Aluminum Alloy
Vol. 36, Issue 10, Pages: 1112-1116(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.10.029

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[1]肖亚婷,蔡启舟,李欣蔚,孙嘉璐,赵炳怡,李冰.均匀化对TiN细化Al-Zn-Mg-Cu合金组织和硬度的影响[J].特种铸造及有色合金,2016,36(10):1112-1116.

Xiao Yating, Cai Qizhou, Li Xinwei, et al. Influence of Homogenization Treatment on Microstructure and Hardness of Nano TiN Refined Al-Zn-Mg-Cu Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 36(10):1112-1116(2016)
[1]肖亚婷,蔡启舟,李欣蔚,孙嘉璐,赵炳怡,李冰.均匀化对TiN细化Al-Zn-Mg-Cu合金组织和硬度的影响[J].特种铸造及有色合金,2016,36(10):1112-1116. DOI： 10.15980/j.tzzz.2016.10.029.

Xiao Yating, Cai Qizhou, Li Xinwei, et al. Influence of Homogenization Treatment on Microstructure and Hardness of Nano TiN Refined Al-Zn-Mg-Cu Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 36(10):1112-1116(2016) DOI： 10.15980/j.tzzz.2016.10.029.

摘要

研究了均匀化处理对纳米TiN/Ti细化Al-Zn-Mg-Cu合金组织及性能的影响。结果表明

纳米TiN/Ti细化剂可显著细化铸态Al-Zn-Mg-Cu铝合金晶粒

使合金的铸态硬度（HV）从123提高至142.3。470℃×24h一级均匀化处理后

Al-Zn-Mg-Cu合金晶界第二相得到了比较充分的溶解

只有少量MgZn2相残留;经过（400℃×10h+470℃×24h）二级均匀化处理后

第二相溶解充分

但在均匀化处理之后的冷却过程中析出MgZn相

并均匀分布在晶粒中。

Abstract

The influences of homogenization treatment on microstructure and mechanical properties of AlZn-Mg-Cu alloy refined by nano TiN/Ti were investigated by SEM

EDS

XRD and hardness test.The results show that the nano TiN/Ti can refine the grains of Al-Zn-Mg-Cu alloy significantly.Hardness of as-cast Al-Zn-Mg-Cu alloy with TiN is improved from 123（HV）to 142.3（HV）.After one-step homogenization（470℃×24h）

the secondary phases in the Al-Zn-Mg-Cu alloy dissolved more sufficiently

almost only MgZn2 phases left.After two-step homogenization（400 ℃×10h + 470 ℃×24h）

MgZn phases are precipitated in the cooling process after homogenizing treatment and distributed uniformly in the grain.