表面技术2024，Vol.53Issue(5)：149-155,7.DOI:10.16490/j.cnki.issn.1001-3660.2024.05.015
热辅助超声滚压温度场参数影响激光熔覆涂层表面粗糙度研究
Effect of Heating Parameters on Roughness of Laser Cladding Coatings Treated by Heat-assisted Ultrasonic Burnishing
摘要
Abstract
Laser cladding technique can save resource consumption,achieve rapid manufacturing and damage repair of high-end parts/components,and thus promote environmental sustainability.However,in most cases,the surface finishing of cladding parts/components cannot meet the requirements of engineering applications,and thus post-cladding processes are required.Here,a sort of post-cladding treatment,that is,ultrasonic warm burnishing coupled with sequent heat treatment(UWB/HT),was proposed and employed to treat coatings after laser cladding.Especially,based on experimental data,a prediction model of surface roughness of the studied Fe-based cladding coating was built.ANOVA and RSM methods were employed to investigate the effect of heating parameters,i.e,heating temperature and heat holding time,on roughness of laser cladding coatings treated by UWB/HT.According to result,the surface roughness of the studied coating was positively related to heating temperature.For instance,at a same holding time,the roughness values of coatings treated at 100℃,250℃and 400℃were Ra 0.237 μm,Ra 0.158 μm and Ra 0.096 μm,respectively.Therefore,it was proved that UWB/HT process could further decrease coating roughness in comparison to traditional ultrasonic burnishing without heating treatment.However,in contrast,a long holding time was supposed to result in slight increase of coating roughness.For instance,at a same heating temperature,the roughness values of coatings treated at 0.5 h,1 h and 2 h were Ra 0.156 μm,Ra 0.164 μm and Ra 0.170 μm,respectively.The warm plasticity of metal materials resulting from high temperature was responsible for the roughness decrease of coating treated by UWB/HT.Meanwhile,longer holding time led to somewhat deformation recovery of burnished coating and therefore resulted in slight roughness increase.According to ANOVA result,heating temperature had a more significant effect on coating roughness than holding time.Within experimental scope,the optimum parameter combination was 400℃heating temperature and 0.5 h holding time,under which a least roughness value of Ra 0.089 μm was achieved.关键词
超声滚压/温塑性/增材制造/表面粗糙度/热处理/铁基合金Key words
ultrasonic burnishing/warm plasticity/additive manufacturing/surface roughness/heat treatment/Fe-based alloy分类
金属材料引用本文复制引用
张常胜,沈学会,罗辉,姜永泉..热辅助超声滚压温度场参数影响激光熔覆涂层表面粗糙度研究[J].表面技术,2024,53(5):149-155,7.基金项目
国家自然科学基金(51775285) （51775285）
山东省自然科学基金(ZR2023ME104) National Natural Science Foundation of China(51775285) （ZR2023ME104）
Shandong Provincial Natural Science Foundation,China(ZR2023ME104) （ZR2023ME104）
