层间停光时间对多层激光熔覆影响实验研究.pdfVIP

Mar．20l5 HydromechatronicsEngineering V01．43 N0．6 HydromechatronicsEngineering http．／／jdy．qks．cqut．edu．ca E-mail：jdygcyw@126．com ResearchoninfluenceoftimeintervaIon Q235Dmultilayerlasercladding De—qiangZHANG ，Xing—linNIU，Jin—huaLI，QiGAO (FacultyofMechanicalEngineeringandAutomation，LiaoningUniversityofTechnology，]inzhou121001，China) Abstract：TheQ235DmuhilayerlasercladdingwithFe．basedalloypowderwascarriedout．Weconcludedthat thecladdinglayersweobtainedaresmoother，andcladdingmetallurgicalbondinglayerisbetter，andnocrack andalmostnoholeappear．Itisfoundthatthehardnessofthewholecladdinglasershasbeenaffectedmuchbyu singdifferenttimeinterva1．Ifthetimeintervalisveryshort．thehardnessofthewholecladdinglaserswillreduce withtheincreaseinnumberofcladdinglayer．Andthehardnessofthefirstcladdinglayeristhehighestofal1the claddinglayers．Thehardnessofthecladdinglayerisdecreasinggraduallyfrom thefirstcladdinglayertothelast． Thehardnessofthelastcladdinglayeristhelowest．Ifthetimeintervalislong．thehardnessofthewholeclad． dinglaserswillreducesimilarlywiththeincreaseinnumberofcladdinglayer．Butthedifferencecomparedwith thelastwayisthatthehardnessofthefirstcladdinglayeristhelowestofallthecladdinglayers．Thehardnessof thecladdinglayerisincreasinggraduallyrfom thefirstcladdinglayertothelast．Thehardnessofthelastcladding layeristhehighest。 Keywords：Q235D，Muhilayerlasercladding，Timeinterval，Laserhardness，Metallographicstructure，Micro— hardHess doi：10．3969／j．issn．1001-3881．2015．06．023 Documentcode：A CLCnumber：TG356．28 Lasercladding technique isa new surfacerepair hasabroadapplicationprospects materialhandlingtechnology，whichuseshigh-eneryg laseroutputlaserbeam tomeltthealloypowdercoat- 1Experimentalmaterialsand laborato- ingonthesurfaceofthesubstrate，formingametallur- ryequipm ent gicalcoatings．Highenergylaserbeam