Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel
The semisolid slurry of Al-Zn-Mg-Cu alloy was prepared through a self-designed water-cooled copper serpentine pouring channel (WSPC) machine. Influences of pouring temperature, the number of turns and the cooling water flow rate on the microstructure of the semisolid Al-Zn-Mg-Cu alloy slurry were in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Foundry Journal Agency
2019-01-01
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| Series: | China Foundry |
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| Online Access: | http://ff.foundryworld.com/uploadfile/2019012455546585.pdf |
| _version_ | 1818766425061326848 |
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| author | Wen-zhi Zhu Wei-min Mao Qing-song Wei |
| author_facet | Wen-zhi Zhu Wei-min Mao Qing-song Wei |
| author_sort | Wen-zhi Zhu |
| collection | DOAJ |
| description | The semisolid slurry of Al-Zn-Mg-Cu alloy was prepared through a self-designed water-cooled copper serpentine pouring channel (WSPC) machine. Influences of pouring temperature, the number of turns and the cooling water flow rate on the microstructure of the semisolid Al-Zn-Mg-Cu alloy slurry were investigated. The results show that the semisolid Al-Zn-Mg-Cu alloy slurry with satisfactory quality can be generated by the WSPC when the pouring temperature is in the range between 680 ºC and 700 ºC. At a given pouring temperature, the average grain size of primary α-Al decreases and the shape factor increases with the increase of the number of turns. When the cooling water flow rate is 450 L·h-1, the obtained semisolid slurry is optimal. During the preparation of the semisolid Al-Zn-Mg-Cu alloy slurry with low superheat pouring, the alloy melt has mixed inhibition and convection flow characteristics by “self-stirring”. When the alloy melt flows through the serpentine channel, the chilling effect of the inner wall of the channel, the convection and mixed inhibition of the alloy melt greatly promote the heterogeneous nucleation and grain segregation. This effect destroys the dendrite growth mode under traditional solidification conditions, and the primary nuclei gradually evolve into spherical or near-spherical grains. |
| first_indexed | 2024-12-18T08:33:47Z |
| format | Article |
| id | doaj.art-55db4cb2484b4c60aefa72587a0578d9 |
| institution | Directory Open Access Journal |
| issn | 1672-6421 1672-6421 |
| language | English |
| last_indexed | 2024-12-18T08:33:47Z |
| publishDate | 2019-01-01 |
| publisher | Foundry Journal Agency |
| record_format | Article |
| series | China Foundry |
| spelling | doaj.art-55db4cb2484b4c60aefa72587a0578d92022-12-21T21:14:23ZengFoundry Journal AgencyChina Foundry1672-64211672-64212019-01-01161313910.1007/s41230-019-8063-4Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channelWen-zhi Zhu0Wei-min Mao1Qing-song Wei2State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China;chool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China;The semisolid slurry of Al-Zn-Mg-Cu alloy was prepared through a self-designed water-cooled copper serpentine pouring channel (WSPC) machine. Influences of pouring temperature, the number of turns and the cooling water flow rate on the microstructure of the semisolid Al-Zn-Mg-Cu alloy slurry were investigated. The results show that the semisolid Al-Zn-Mg-Cu alloy slurry with satisfactory quality can be generated by the WSPC when the pouring temperature is in the range between 680 ºC and 700 ºC. At a given pouring temperature, the average grain size of primary α-Al decreases and the shape factor increases with the increase of the number of turns. When the cooling water flow rate is 450 L·h-1, the obtained semisolid slurry is optimal. During the preparation of the semisolid Al-Zn-Mg-Cu alloy slurry with low superheat pouring, the alloy melt has mixed inhibition and convection flow characteristics by “self-stirring”. When the alloy melt flows through the serpentine channel, the chilling effect of the inner wall of the channel, the convection and mixed inhibition of the alloy melt greatly promote the heterogeneous nucleation and grain segregation. This effect destroys the dendrite growth mode under traditional solidification conditions, and the primary nuclei gradually evolve into spherical or near-spherical grains.http://ff.foundryworld.com/uploadfile/2019012455546585.pdfAl-Zn-Mg-Cu Alloysemisolid slurrywater-cooled serpentine channelprimary α-Al |
| spellingShingle | Wen-zhi Zhu Wei-min Mao Qing-song Wei Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel China Foundry Al-Zn-Mg-Cu Alloy semisolid slurry water-cooled serpentine channel primary α-Al |
| title | Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel |
| title_full | Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel |
| title_fullStr | Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel |
| title_full_unstemmed | Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel |
| title_short | Preparation of Al-Zn-Mg-Cu alloy semisolid slurry through a water-cooled serpentine pouring channel |
| title_sort | preparation of al zn mg cu alloy semisolid slurry through a water cooled serpentine pouring channel |
| topic | Al-Zn-Mg-Cu Alloy semisolid slurry water-cooled serpentine channel primary α-Al |
| url | http://ff.foundryworld.com/uploadfile/2019012455546585.pdf |
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