ZnS颗粒大小对Al-24Si合金变质效果的影响
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摘要
采用水热法制备了三种不同颗粒尺寸的ZnS粉末,以ZnS颗粒为Al-24Si过共晶铝硅合金的变质剂并通过外加的方式加入其中,研究了ZnS的粒径大小、分散度对其变质效果的影响。结果表明,在一定范围内,ZnS颗粒的粒径越小,分散度越好,变质细化效果就越好,可将初晶硅的平均尺寸细化至30μm以下。最后结合传统异质形核理论对ZnS变质机理进行了分析讨论。
Three kinds of ZnS powders with different particle sizes were prepared by hydrothermal method. The ZnS particles were used as modifiers of hypereutectic Al-24 Si alloy and were added by external mean. The influences of particle size and dispersity of ZnS on the modification effect were studied.The results show that, in a certain range, the smaller the particle size of ZnS is, the better the dispersion is, the better the refinement effect is. The average size of the primary silicon can be refined to 30 μm or less. Combined with the traditional heterogeneous nucleation theory, the modification mechanism of ZnS was analyzed and discussed.
Three kinds of ZnS powders with different particle sizes were prepared by hydrothermal method. The ZnS particles were used as modifiers of hypereutectic Al-24 Si alloy and were added by external mean. The influences of particle size and dispersity of ZnS on the modification effect were studied.The results show that, in a certain range, the smaller the particle size of ZnS is, the better the dispersion is, the better the refinement effect is. The average size of the primary silicon can be refined to 30 μm or less. Combined with the traditional heterogeneous nucleation theory, the modification mechanism of ZnS was analyzed and discussed.
引文
[1]李华基,吴玉露,胡慧芳.Al-24%Si过共晶合金的磷锶变质效果研究[J].热加工工艺,2010,39(17):35-38.
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[5]王爱琴,谢敬佩,刘忠侠,等.P+RE变质对过共晶Al-Si合金组织性能的影响[J].特种铸造及有色合金,2007,27(10):804-806..
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[7]Li C D,Si W Q,Zhao M,et al.A new Al-ZnS master alloy designed for modifying hypereutectic Al-Si alloy and its refinement performance on primary Si[J].Advanced Materials Research,2015,1088:242-244.
[8]Al-Helal Kawther,Stone Ian,Fan Zhongyun.Refinement of primary silicon crystals by novel Al-ZnS master alloy in solidification of hypereutectic Al-Si alloys[J].Materials Science Forum,2016,877:550-557.
[9]BramfittBruceL.Theeffectofcarbideandnitrideadditionson the heterogeneousnucleationbehaviorofliquidiron[J].Metallurgical Transactions,1970,1(10):2958-2958.
[10]姜中涛.Al-2X(X=Ca,Y,Ce)金属化合物对镁合金晶粒细化、组织及力学性能的影响[D].重庆:重庆大学,2016.
[11]胡庚祥,蔡珣,戎咏华.材料科学基础[M].上海:上海交通大学出版社,2000:230-244.
[2]胥锴,刘徽平,袁帮谊,等.过共晶铝硅合金变质处理的研究进展[J].热加工工艺,2009,38(3):32-35.(下转第92页)
[3]李贞宽,边秀房,韩娜,等.纯铈对共晶和过共晶Al-Si合金微观组织的影响[J].铸造技术,2006,27(11):1210-1213.
[4]刘相法,乔进国,刘玉先,等.Al-P中间合金对共晶和过共晶Al-Si合金的变质机制[J].金属学报,2004,40(5):471-476.
[5]王爱琴,谢敬佩,刘忠侠,等.P+RE变质对过共晶Al-Si合金组织性能的影响[J].特种铸造及有色合金,2007,27(10):804-806..
[6]Li C D,Sun C H,Si W Q,et al.Effects of ZnS modification on primarySiinhypereutecticAl-Sialloy[J].ChinaFoundary,2017,14(2):93-97.
[7]Li C D,Si W Q,Zhao M,et al.A new Al-ZnS master alloy designed for modifying hypereutectic Al-Si alloy and its refinement performance on primary Si[J].Advanced Materials Research,2015,1088:242-244.
[8]Al-Helal Kawther,Stone Ian,Fan Zhongyun.Refinement of primary silicon crystals by novel Al-ZnS master alloy in solidification of hypereutectic Al-Si alloys[J].Materials Science Forum,2016,877:550-557.
[9]BramfittBruceL.Theeffectofcarbideandnitrideadditionson the heterogeneousnucleationbehaviorofliquidiron[J].Metallurgical Transactions,1970,1(10):2958-2958.
[10]姜中涛.Al-2X(X=Ca,Y,Ce)金属化合物对镁合金晶粒细化、组织及力学性能的影响[D].重庆:重庆大学,2016.
[11]胡庚祥,蔡珣,戎咏华.材料科学基础[M].上海:上海交通大学出版社,2000:230-244.