筒体温度对微熔铸半固态熔体A356晶粒形貌的影响?
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摘要
研究了筒体温度对微熔铸半固态熔体铝合金A356晶粒形貌的影响。结果表明,在适当的温度范围内,配合一定的搅拌速度,能形成组织均匀、晶粒细小的A356半固态熔体。当筒体温度为620℃,搅拌速度为800r·min-1时,可制备出优质的A356半固态熔体,α-Al晶粒的平均尺寸为54μm,形状因子为0.66,熔体样品的显微硬度为HV 82.97。
Effect of bucket temperature on the grain morphology of semi-solid melt A356 aluminum alloy by micro fused-casting was studied in this paper.In the results,the semi-solid melt A356 with uniform microstructure and fine grain can be formed at the appropriate temperature and a certain stirring speed.The semi-solid melt A356 in high quality can be prepared at the bucket temperature of 620 ℃ in the stirring velocity of 800 r·min-1,the average size of α-Al grains is 54 μm,the shape factor is 0.66,and the Vickers hardness is HV 82.97.
Effect of bucket temperature on the grain morphology of semi-solid melt A356 aluminum alloy by micro fused-casting was studied in this paper.In the results,the semi-solid melt A356 with uniform microstructure and fine grain can be formed at the appropriate temperature and a certain stirring speed.The semi-solid melt A356 in high quality can be prepared at the bucket temperature of 620 ℃ in the stirring velocity of 800 r·min-1,the average size of α-Al grains is 54 μm,the shape factor is 0.66,and the Vickers hardness is HV 82.97.
引文
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[13]Zhu W Z,Mao W M,Tu Q.Preparation of semi-solid 7075aluminum alloy slurry by serpentine pouring channel.Trans Nonferrous Met Soc China,2014,24(4):954
[14]Liu Z Y,Mao W M,Wang W P,et al.Preparation of semi-solid A380 aluminum alloy slurry by serpentine channel.Trans Nonferrous Met Soc China,2015,25(5):1419
[15]Luo X Q,Li Z Y,Shi X J,et al.Effect of stirring velocity in micro fused-casting for metal on microstructure and mechanical properties of A356 aluminum alloy slurry.JWuhan Univ Technol Mater Sci,2016,31(5):1131
[2]Thompson S M,Bian L,Shamsaei N,et al.An overview of direct laser deposition for additive manufacturing;Part I:transport phenomena,modeling and diagnostics.Addit Manuf,2015,8:36
[3]Flemings M C.Behavior of metal alloys in the semisolid state.Metall Trans B,1991,22(3):269
[4]Zhang H O,Xu J P,Wang G L.Fundamental study on plasma deposition manufacturing.Surf Coat Technol,2003,171(1-3):112
[5]Luo X Q,Yan Q Z,Li Z Y.Effect of the pouring temperature by novel synchronous rolling-casting for metal on microstructure and properties of ZLl04 alloy.JMater Res,2016,31(16):2524
[6]Rice C S,Mendez P F,Brown S B.Metal solid freeform fabrication using semi-solid slurries.JOM,2000,52(12):31
[7]Flemings M C.Solidification processing.Metall Trans,1974,5(10):2121
[8]Guo J,Xie S S,Huang S H.Preparation of Al alloy in semisolid state.Chin J Rare Met,1998,22(6):424(郭钧,谢水生,黄声宏.半固态铝合金的制备工艺研究.稀有金属,1998,22(6):424)
[9]Spencer D B,Mehrabian R,Flemings M C.Rheological behavior of Sn-15 pct Pb in the crystallization range.Metall Mater Trans B,1972,3(7):1925
[10]Orme M.A novel technique of rapid solidification net-form materials synthesis.J Mater Eng Perform,1993,2(3):399
[11]La P Q,Lu X F,Shen D,et al.Study on high grade vanadium-aluminium alloy prepared by aluminothermic reaction.Powder Metall Technol,2012,30(5):371(喇培清,卢学峰,申达,等.铝热法制备高钒铝合金的研究.粉末冶金技术,2012,30(5):371)
[12]Piwonka T S,Flemings M C.Pore formation in solidification.Trans Metall Soc AIME,1966,236(8):1157
[13]Zhu W Z,Mao W M,Tu Q.Preparation of semi-solid 7075aluminum alloy slurry by serpentine pouring channel.Trans Nonferrous Met Soc China,2014,24(4):954
[14]Liu Z Y,Mao W M,Wang W P,et al.Preparation of semi-solid A380 aluminum alloy slurry by serpentine channel.Trans Nonferrous Met Soc China,2015,25(5):1419
[15]Luo X Q,Li Z Y,Shi X J,et al.Effect of stirring velocity in micro fused-casting for metal on microstructure and mechanical properties of A356 aluminum alloy slurry.JWuhan Univ Technol Mater Sci,2016,31(5):1131