超声冲击对Al_(2)FeCoNiCrW_(0.5)高熵合金涂层摩擦磨损性能的影响  

Effect of Ultrasonic Impact Treatment on the Friction and Wear Properties of Al_(2)FeCoNiCrW_(0.5) High Entropy Alloy Coatings

作　　者：张冲 李庆达[1] 郭建永 汪昊 刘鸿媛 ZHANG Chong;LI Qingda;GUO Jianyong;WANG Hao;LIU Hongyuan(College of Engineering,Heilongjiang Bayi Agricultural University,Daqing 163319,China;College of Mechanical and Automotive Engineering,Zhaoqing University,Zhaoqing 526061,China)

机构地区：[1]黑龙江八一农垦大学工程学院,黑龙江大庆163319 [2]肇庆学院机械与汽车工程学院,广东肇庆526061

出　　处：《材料保护》2025年第1期82-88,共7页Materials Protection

基　　金：黑龙江省自然科学优秀青年基金(YQ2019E032);黑龙江八一农垦大学“三纵”科研支持计划重点专项(ZDZX202102);肇庆学院2023年校级科研基金项目(QN202336)。

摘　　要：为探究超声冲击处理对Al_(2)FeCoNiCrW_(0.5)高熵合金涂层摩擦磨损性能的影响,采用激光熔覆工艺在45钢基体表面制备Al_(2)FeCoNiCrW_(0.5)高熵合金涂层,并对涂层进行5 min和10 min的超声冲击处理(UIT),测试和分析了不同超声冲击时间下高熵合金涂层的微观组织、显微硬度和摩擦磨损性能。结果表明:涂层由BCC相和FCC相组成,超声冲击处理前后,涂层的相结构并未发生改变,超声冲击后涂层晶粒发生细化,局部达到纳米晶尺寸。10 min内,随着超声冲击时间的延长,涂层的硬度不断提高,表面显微硬度最大为893 HV0.5。相同摩擦磨损试验条件下,10 min超声冲击处理涂层的磨损体积为3.391 mm^(3),耐磨性较未进行超声冲击处理的涂层提高了20%。超声冲击处理前后高熵合金涂层的磨损机制由磨粒磨损、氧化磨损和黏着磨损转变为磨粒磨损和氧化磨损,超声冲击处理可有效提升高熵合金涂层的摩擦磨损性能。In order to investigate the influence of ultrasonic impact treatment(UIT)on the friction and wear properties of Al_(2)FeCoNiCrW_(0.5)high⁃entropy alloy coatings,these coatings were prepared on the 45 steel substrate by a laser cladding process.The coatings were subjected to UIT for 5 and 10 min,and the microstructure,microhardness and friction and wear characteristics of the high entropy coatings were evaluated under varying ultrasonic impact times.Results indicated that the coating was composed of BCC phase and FCC phase,and the phase structure of the coating remained unchanged before and after ultrasonic impact treatment.After treatment by ultrasonic impact,the coating grains were re⁃fined and locally reached nanocrystalline size.Within 10 min,the increase of ultrasonic impact time improved the hardness of the coating con⁃tinuously,and the maximum surface microhardness was 893 HV0.5.Under the same friction and wear test conditions,the wear volume of the coating treated with ultrasonic impact for 10 min was 3.391 mm^(3),and the wear resistance was improved by 20%compared with the coating 83 without ultrasonic impact treatment.Moreover,the wear mechanism of the high entropy alloy coatings before and after ultrasonic impact treat⁃ment changed from abrasive wear,oxidative wear and adhesive wear to abrasive wear and oxidative wear.In general,ultrasonic impact treat⁃ment could effectively improve the friction and wear properties of high entropy alloy coatings.

关 键 词：超声冲击 激光熔覆 高熵合金 摩擦磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]