RE对铸造Al-6Zn-2.5Mg-1.8Cu合金热裂倾向性的影响
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摘要
在铸造Al-6Zn-2.5Mg-1.8Cu合金中分别加入0、0.05%、0.1%和0.15%的RE,研究了RE对合金的热裂倾向、微观组织和力学性能的影响。结果表明,RE的加入可细化晶粒尺寸,提高合金的力学性能,降低合金的热裂倾向。在加入范围内,RE含量为0.1%时,热裂倾向性最低,晶粒尺寸最小,力学性能最佳,合金的抗拉强度和伸长率分别为180MPa和3%。
Hot tearing susceptibility,microstructures and mechanical properties of cast Al-6Zn-2.5Mg-1.8Cu alloy with RE contents Such as 0,0.05%,0.1% and 0.15% were investigated.The results reveal that RE addition in alloy can refine grain size and improve the mechanical properties as well as decreasing the hot tearing susceptibility of the alloy.The alloy with 0.1%RE has the lowest hot tearing susceptibility,the smallest grain size and the desirable mechanical properties,where tensile strength and elongation of the alloy reach 180 MPa and 3%,respectively.
Hot tearing susceptibility,microstructures and mechanical properties of cast Al-6Zn-2.5Mg-1.8Cu alloy with RE contents Such as 0,0.05%,0.1% and 0.15% were investigated.The results reveal that RE addition in alloy can refine grain size and improve the mechanical properties as well as decreasing the hot tearing susceptibility of the alloy.The alloy with 0.1%RE has the lowest hot tearing susceptibility,the smallest grain size and the desirable mechanical properties,where tensile strength and elongation of the alloy reach 180 MPa and 3%,respectively.
引文
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[4]PENG G H,CHEN K H,CHEN S Y,et al.Evolution of the second phase particles during the heating-up process of solution treatment of Al-Zn-Mg-Cu alloy[J].Materials Science and Engineering,2015,A641:237-241.
[5]陈晓,黄胜.晶粒细化对铸造Al-7Zn-2.5Mg-Cu合金性能的影响[J].特种铸造及有色合金,2012,32(11):991-995.
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[8]黄胜,陈晓,陈淑婉.浇注温度对Al-7Zn-2.5Mg-Cu合金组织和热裂性能的影响[J].铸造技术,2013,34(1):72-75.
[9]张兴孟,毛卫民,朱文志.Zn、Mg、Cu对7075铝合金热裂性能和组织的影响[J].特种铸造及有色合金,2014,34(12):1 336-1 339.
[10]杨兵,杨天云,周鹏,等.不同RE含量对A1-Cu-Mn合金组织和性能的影响口[J].铸造技术,2012,33(2):171-173.
[11]滕海涛,熊柏青,张永安,等.高Zn含量Al-Zn-Mg-Cu系铝合金的凝固态显微组织[J].中国有色金属学报,2015,25(4):852-865.
[12]黄高仁,孙乙萌,张利,等.Ce对Al-Zn-Mg-Cu合金亚快速凝固铸造组织的影响[J].材料工程,2017(11):102-107.
[13]陈志国,周娴,舒军,等.稀土在铝合金中微合金化研究进展[J].矿冶工程,2010,30(2):102-106.
[14]董晟全,周敬恩,严文,等.微量元素对Al-4.5Cu合金力学性能的影响[J].特种铸造及有色合金,2003(1):16-18.
[15]邱克强,陶思伟,热焱,等.Ca对Mg-7Al-2Si合金热裂倾向的影响[J].特种铸造及有色合金,2013,33(2):186-190.
[16]张秀梅,史志铭,刘瑞堂,等.稀土Ce变质对ZL101合金铸态组织和性能的影响[J].铸造,2008,57(8):838-841.
[17]王静鸽.Zn和复合稀土(La-Ce)对锌铝合金组织和性能的影响[D].西安:西安理工大学,2015.
[18]刘金水,谢贤清,蒋冰,等.Ce对Zn-Al合金组织性能的影响[J].中国有色金属学报,1998,8(S1):6-11.