Materials Reports  2020, Vol. 34 Issue (Z1): 338-340 |
| METALS AND METAL MATRIX COMPOSITES |
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| Investigation on Homogenization Process of Large Size of Al-Zn-Mg-CuAluminum Alloy Ingot |
| CHAO Daiyi1,2, LI Changlong1,2, ZHAO Jialei1,2, SUN Youzheng1,2,ZHAO Zhiguo1,2, HUO Yan1, LYU Zhengfeng1,2
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1 Shandong Nanshan Aluminum Co., Ltd., Longkou 265713, China;
2 National Engineering Research Center for Plastic Working of Aluminium Alloys, Longkou 265713, China |
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Abstract In order to solve the homogenization issues of the large size Al-Zn-Mg-Cu alloy ingot, the effect of homogenization process on the microstructure and over-burning of Al-Zn-Mg-Cu alloy large ingot was studied by using OM, DSC, SEM and TEM analysis methods. The results showed that: a large number of dispersed Al3Zr phase was precipitated in the matrix after homogenized at 420 ℃ for 4 h, while the ingot was over-burned after increasing the temperature up to 475 ℃. After the alloy was homogenized at 470 ℃/8 h, the peak of the low melting point of the alloy moved to the high temperature direction, the dendritic structure in the alloy basically disappeared, and the Zn-rich and Mg-rich phases disappeared, the EDS test showed that the alloy mainly consisted of Cu-rich, Mg-rich and Cu-rich and Fe phases, and the over-burning temperature reached 480 ℃. In order to further reduce the influence of Cu-rich and Mg-rich phases, the temperature was further increased to 478 ℃ on the basis of 470 ℃ homogenization, no over-burning was found and the content of the second phase was further reduced. In this paper, the homogenization tempe-rature of Al-Zn-Mg-Cu alloy large ingots was determined to be 420 ℃/4 h+470 ℃/8 h+478 ℃/12 h, at this time the ingot had no over-burned and the second phase content decreased obviously.
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Published: 01 July 2020
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| About author:: Daiyi Chao received his master of engineering in environmental and material engineering from Yantai University in June 2013. From September 2013 to March 2017, he studied for doctorate in School of Materials Science and Engineering, Harbin Institute of Technology. Mainly engaged in heat treatment and deformation process of high strength aluminum alloy. At present, he is a failure analysis expert of Chines Failure Analysis Institution of CMES ; Youzheng Sun graduated from the School of Materials Science and Engineering of Northeast University in January 2017 with a doctorate in materials science. At present, he is one postdoctoral of Nanshan Group postdoctoral workstation, concurrently serves as the director of Aviation Materials Research Department of Nanshan Aluminum Research Institute, mainly engaged in research and certification of high-performance aviation aluminum alloy. |
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1 Dursun T D, Soutis C. Materials & Design,2014,56,862.
2 方华婵,陈康华,巢宏.粉末冶金材料科学与工程,2009,14(6),352.
3 晁代义,孙有政.材料导报,2019,33(S2),398.
4 杨剑冰,庞兴志,胡治流.广西大学学报(自然科学版),2019,44(3),899.
5 刘园.高强耐蚀7050铝合金成分优化与时效行为研究.硕士学位论文,哈尔滨工业大学,2016.
6 冯丹艳.热加工工艺,2020(10),30.
7 刘守法,王晋鹏,李凡国.金属热处理,2018,43(9),27.
8 Chen K H, Fang H C. Materials Science Engineering A,2008,497(1-2),426.
9 Kai W, Xiong B Q, Fan Y Q. Rare Metals,2018,37(5),376. |
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