ndfeb永磁合金激光表面改性技术研究

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1、擒瓣蕊三伐舔±隶缀合金NdFeB夔箕鼹蹩爨、撼蜜霪、离撬禳强塞、蕊魏磁搂耗替概械性能和磁常性能以搜机械、物理和磁性的组合受到了越涞趟广泛的燕注。毽是NdFeB承鬣瓣藕零赛褰嚣态嚣鬻环麓孛餐鬟灌受巍馋零囊漶，零藩蕊体性能的下降，这已缀成为扩大其艘用的～个主要障碍。零变在瓣NdFeB衣藏螽惫蕊囊镳霹爨遘孬了添久鼹了解与磷窕游摹秣上采用激光表麟淑性技术对Nd№B含焱表匿进行激光熔凝裁熔疆。邋避在壤徐蟓NdFeB萋骼纛嚣主潦覆一露赫手琢藏菲菇静成努静啻金鬣灏霞符裔辩晶纯成分要浆戆表攫，褥经避激必敬抉速搬热窥姨涟冷凝；楼NdFeB会金袭黉{辱要g黎缝往

2、能、磁愁能都裰好的菲晶淼薄层，觚而解决其腐蚀问题。焱潼NdFeB隶簸台垒茨瀑莓蒸羧(涂≥覆嚣嚣竣诗嚣辩、囊势浚诗、溪蘸方法殿非晶溅(涂)灏艨的形成条件茅ci可行憾进行了煺论分书阡殿探探讨的基石出上，奉文淹凄了NdFeB隶蔽含佥袋嚣溱赘辖螽戳懿改装撩零方渣。根据快涟凝固原理和NdFeB台念自身的特点。裳验遐j焦控制糊调节激搬处莲辩游各参鼗蕊六雩、，著菱蒹经逶裘骏穆委，努褥缭浆表霹撵NdFeB台众袭箍褥捌’F颗粒擞必缨小敬纳涨熬积棼熬。对熙缚搂晶屡熬耐蚀蛙避行崽媳学测试姆结慕瓣臻，葜辩强稳榴霜予策艇理鹩试祥青了缀大撼高。程解决上述谴蹙鹣基毯上，本

3、文懑激巍蕊凝、遮骥蘑产生鹣显徽袋菠爨蘩溪瑶耐媳经的澎响进行了探讨，提出了i鲢制其产生和擞展的方法。激键词}NdFeB永磁愉金激光熔凝激光燃裰非晶ABSTRACTNdFetBalloy,the瓤掰generationofpermanentmagneticmaterial．isgettingmoreandmoreattentionforitsexcellentmechanicalandmagneticperforewent．such黔lowenergywearing，towdensity,highmchanieatintensityandlowm

4、agneticenergywastage，Butitisprone荤obeoxidedorbeeorred嚣￡theeo鞋臻滟en≮Sromem,whlehresultinthereductionoftheperformenceofNdFeBalloy．Thishasbeenbecomingtheobstructionofenlargingksusage．Basedonthethoroughcomprehensionandreseachofi玲corrosion,thlsthesisadoptsthemodifyingtechnologyof

5、meltal-s{31idifieationandmeltal“coatingbylaseronNdFeBalloysurface，避coatingalayerofalloy,whichiseasytoformthenon-crystalOnthecheapNdFeBalloy,thenheatingupandcoolingdownquikly,thenon*crystalwhoseanti-corrosionandmagneticperformenceisverye-xeellentembeoblained，theexistingprobl

6、emissolved．o珏thebasisofanalysisanddiscussionaboutthedesignpzinei#e,ingredienLaggmdationmeansofcoatingofNdFeBalloyanditscomposingconditionandfeasibifity,6heteclmotogiedirection舔non-erystal

7、izgfionbylaser氧pointedouttomodifythecharacteristicsofNdFeBalloysurface．Accordingtotheq

8、uiektysolidifyingtheorymidtheeharaeterimicsofNdFeBaUoyitself,By,rigcomroliagthepal'amentsdlaserdisposition,andcorrectingthemintheseexperiments，theresultsshowthatnm*crystalandnon*crystalwhosegrainisverysmall瓣obtained瓣thesurface《NdFeBalley．Theel释tronie-chemieaitestingresultst

9、ellthatcomparingtothoseundisposedsamplesofthe珏nti—corrosionper

10、brraeatofNdFeBahoyi