电焊机2024，Vol.54Issue(7)：20-25,6.DOI:10.7512/j.issn.1001-2303.2024.07.03
激光熔覆铁铬梯度涂层界面调控与性能研究
Laser Cladding of Iron-Chromium Gradient Coatings:Interface Regulation and Performance Improvement
摘要
Abstract
Iron-chromium gradient coatings were prepared on 45 steel substrates using laser cladding technology to address the wear issue of screw drills.To tackle the common cracking problem during the cladding process,an optimization strategy was proposed to regulate the powder composition of the gradient coatings.Gradient hardness was achieved using cladding powders with different carbon contents,and the interface bonding was improved by introducing a JG-3 transition layer.The study revealed that the gradient coatings exhibited a gradual increase in hardness and enhanced wear resistance.The JG-3 transition layer effectively promoted the interfacial bonding between the substrate and the cladding layer,connecting differ-ent hardness layers and preventing cracking.Fracture morphology analysis indicated that the cladding layer exhibited typical"river pattern"cleavage fracture characteristics.Irregular metal oxides could tear the cladding layer matrix,significantly re-ducing its performance.Therefore,surface polishing of each layer after cladding is recommended to ensure complete re-moval of interfacial oxide layers.The prepared iron-chromium gradient coatings maintained a smooth and crack-free inter-face,providing an effective solution and basis for addressing cracking issues during the cladding process of gradient coat-ings.关键词
激光熔覆/梯度涂层/界面行为/硬度/解理断裂Key words
laser cladding/gradient coating/interface behavior/hardness/cleavage fracture分类
矿业与冶金引用本文复制引用
阴明,郭枝梁,庞雅琪,李岩..激光熔覆铁铬梯度涂层界面调控与性能研究[J].电焊机,2024,54(7):20-25,6.基金项目
临汾市重点研发计划(2334) （2334）
山西电子科技学院人才引进启动资金(2023RKJ031) （2023RKJ031）
