激光烧结原位合成Cu-Al合金组织结构及性能研究  

Microstructure and Properties of Cu⁃Al Alloy Sintered by Laser⁃Induced Self⁃propagating Synthesis

作　　者：水东莉[1] 李刚 徐晓辰[2] SHUI Dongli;LI Gang;XU Xiaochen(School of Agricultural Equipment Engineering,Liaoning Agricultural Vocational and Technical College,Yingkou 115009,Liaoning,China;Yingkou College of Technology,Yingkou 115014,Liaoning,China)

机构地区：[1]辽宁农业职业技术学院农业装备工程学院,辽宁营口115009 [2]营口理工学院,辽宁营口115014

出　　处：《矿冶工程》2023年第3期156-159,共4页Mining and Metallurgical Engineering

基　　金：辽宁省教育厅科技研究项目(LJKZ1195);营口理工学院创新团队支持计划(TD202001);营口理工学院高层次人才科研启动项目(YJRC202014)。

摘　　要：针对铜铝粉末坯体,以激光高能束为热源引发铝热放热反应,原位合成硬质增强相Al_(2)O_(3),烧结制备了Cu-Al合金,研究了铜铝成分配比对合金体系微观组织和性能的影响。结果表明,Cu-Al合金组织是由硬质增强相Al_(2)O_(3)和基体CuAl_(2)、AlCu_(4)、Al_(4)Cu_(9)等金属间化合物构成的多相结构;合金显微组织具有丰富的树枝晶,且随着铝含量增加,组织均匀细化程度提高;在一定范围内,增加铝含量有助于提高烧结产物致密性;当铜铝质量比为33.2∶66.8时,烧结产物的孔隙率最低(10.57%)、显微硬度值最高(373HV)、磨损性最佳(磨损率0.137 g/mm^(2))。With laser high⁃energy beam as heat source to initiate exothermic reaction,Cu⁃Al powder was compacted and sintered into Cu⁃Al alloy containing in⁃situ formed hard reinforcing phase Al_(2)O_(3) by laser⁃induced self⁃propagating synthesis.The effect of Cu⁃Al ratio in the composition on the microstructure and properties of alloy system was explored.The results show that the microstructure of Cu⁃Al alloy is a multiphase structure composed of hard reinforcing phase Al_(2)O_(3) and matrix of CuAl_(2),AlCu_(4),Al_(4)Cu_(9) and other intermetallic compounds.The alloy has rich dendritic crystals in microstructure,and becomes more uniform and fine⁃grained with the increase of aluminum content.Increasing the content of aluminum to a certain range is helpful to improve the compactness of sintered products.With copper and aluminum in a mass ratio of 33.2∶66.8,the sintered product has the lowest porosity(10.57%),the highest microhardness(373HV)and the best wear resistance(with wear rate of 0.137 g/mm^(2)).

关 键 词：激光烧结 增强相 硬质相 原位合成 三氧化二铝 CU-AL合金 微观组织 

分 类 号：TG139[一般工业技术—材料科学与工程]