重型机械Issue(6)：1-10,10.
激光熔覆涂层缺陷成因及抑制机理
A review on the causes and suppression mechanisms of cracks in laser-clad coatings
摘要
Abstract
Laser cladding has established itself as a key technology in surface strengthening and remanufacturing,owing to its broad material selectivity,high bonding strength,and minimal heat-affected zone.However,the intrinsic rapid melting and solidification process often induces significant residual stress,leading to crack initiation and propagation within the coating,which severely limits its broader application.This paper provides a systematic review of the causes,suppression methods,and underlying mechanisms of cracks in laser-clad coatings.It begins with an in-depth analysis of crack origins from the perspectives of residual stress(comprising thermal stress,phase transformation stress,and constraint stress)and the matching of material physical properties.Subsequently,it elaborates on the operating mechanisms and research progress of various crack suppression strategies,including optimization of process parameters,addition of transition layers or rare earth elements,implementation of pre-heating and post-heat treatments,application of external auxiliary fields(e.g.,induction,electromagnetic,ultrasonic),and integration of in-situ process monitoring with numerical simulation.Finally,future development trends toward intelligentization and multi-field coupling are outlined.This review aims to furnish a theoretical basis and technical support for understanding the formation mechanisms,effective control,and suppression of cracks in laser-clad coatings.关键词
激光熔覆/涂层/裂纹/残余应力/抑制机理Key words
laser cladding/coating/crack/residual stress/suppression mechanism分类
矿业与冶金引用本文复制引用
谢晓明,曾宁富,刘冠,赵凯,彭磊,敖登魁..激光熔覆涂层缺陷成因及抑制机理[J].重型机械,2025,(6):1-10,10.基金项目
国家自然科学基金(52471055) （52471055）
