轧制变形量对Al-Sn合金第二相形貌演变及性能的影响  

Influence of Rolling Deformation on Morphology Evolution and Properties of Second⁃ary Phase in Al-Sn Alloy

作　　者：李士明 董壮壮[3] LI Shiming;DONG Zhuangzhuang(School of Mechanical and Electrical Engineering,Hubei Polytechnic University,Huangshi 435000;Key Laboratory of Intelligent Transportation Technology and Equipment in Hubei Province,Hubei Polytechnic Univer-sity,Huangshi 435000;China Heavy Duty Automobile Group Co.,Ltd.,Ji′nan 250102)

机构地区：[1]湖北理工学院机电工程学院,黄石435000 [2]湖北理工学院智能输送技术与装备湖北省重点实验室,黄石435000 [3]中国重型汽车集团有限公司,济南250102

出　　处：《特种铸造及有色合金》2024年第10期1423-1428,共6页Special Casting & Nonferrous Alloys

基　　金：湖北省教育厅科学技术研究计划指导性资助项目(B2016271)。

摘　　要：研究了轧制变形量对Al-Sn合金中的第二相形貌演变及摩擦性能的影响。通过感应熔炼工艺制备得到Al-Sn合金铸锭,随后对合金进行轧制处理并精确调控轧制变形量,揭示合金中富Sn第二相的形貌演变规律。结果表明,随着轧制变形量增加,富Sn第二相逐渐由连续网状结构转化为不连续短纤维结构,合金摩擦因数维持在0.27左右,但摩擦过程中的滑移现象显著减弱。同时,合金的维氏硬度(HV)由铸态时的17.9升高至75%变形量下的28.8,磨损率由7.49×10^(-4)mm^(3)/(N·m)下降至5.51×10^(-4)mm^(3)/(N·m)。因此,短纤维状第二相可以提升合金的自润滑性能,而合金硬度和自润滑性能的同步提升共同导致Al-Sn耐磨性能的提升。The influence of rolling deformation on the morphology evolution of secondary phases and friction properties of Al-Sn alloy was investigated.Al-Sn alloy ingots were prepared by induction melting process.Then,the alloy was subjected to rolling treatment.The rolling deformation was precisely controlled to reveal the morphology evolution of Sn-rich secondary phases.The results iudicate that as the rolling deformation increases,the Sn-rich secondary phase is gradually transformed from a continuous network structure to a discontinuous short fiber structure,and the friction coef⁃ficient remains around 0.27.However,the sliding-slip phenomenon during the friction process is significantly weak⁃ened.Meanwhile,the Vickers hardness of alloy is increased from 17.9 HV in as-cast state to 28.8 HV at 75%deforma⁃tion,and the wear rate is decreased from 7.49×10^(−4)mm^(3)/(N∙m)to 5.51×10^(−4)mm^(3)/(N∙m).Therefore the short fiber like second phase enhances the self-lubricating performance of alloys,and the synchronous improvement of hardness and self-lubricating performance leads to the improvement of wear resistance of Al-Sn alloys.

关 键 词：Al-Sn合金 第二相 自润滑性能 耐磨性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]