Kev khiav hauj lwm ib puag ncig ntawm cua turbines yog hnyav heev, nws yuav tsum muaj peev xwm tiv taus qhov kub thiab txias, txias, cua xuab zeb, av noo thiab txawm tias ntsev tsuag tshuaj ntsuam. Cua turbines yog tsim los kav 20 xyoo. Tam sim no, ob qho tib si cua turbines me me thiab megawatt ruaj khov hlau nplaum cua turbines raug xaivsintered NdFeB hlau nplaum. Yog li ntawd, kev xaiv ntawm NdFeB mus tas li sib nqus tsis sib nqus thiab cov kev cai ntawm corrosion kuj ntawm cov hlau nplaum tseem ceeb heev.
Cov khoom sib nqus ntawm sintered NdFeBhlau nplaumhauvcua turbines
Ndfeb mus tas li hlau nplaum, hu ua peb tiam ntawm lub ntiaj teb tsis tshua muaj hlau nplaum ruaj khov, yog cov khoom siv hlau nplaum siab tshaj plaws kom deb li deb. Lub ntsiab theem ntawm sintered NdFeB hlau nplaum yog intermetallic compound Nd2Fe14B, uas muaj saturation magnetic polarization zog (Js) ntawm 1.6T. Cov khoom siv hluav taws xob siab tshaj plaws ntawm cov hlau nplaum tuaj yeem nce ntxiv los ntawm kev nce qib ntawm cov theem tseem ceeb, kev taw qhia ntawm cov nplej thiab qhov ntom ntawm cov hlau nplaum.
Lub demagnetization nkhaus ntawm NdFeB ntawm chav tsev kub yog kwv yees li ncaj. Yog li ntawd, thaum tsim cov hlau nplaum ruaj khov, cov ntaub ntawv NdFeB nrog siab BH feem ntau xaiv kom tau txais huab cua sib nqus sib nqus. Thaum lub cev muaj zog khiav, vim muaj qhov sib txawv ntawm qhov chaw demagnetizing thiab qhov kev hloov pauv tam sim ntawd, lub demagnetizing teb generated los ntawm instantaneous loj tam sim no yuav tsum tau xaiv sintered NdFeB hlau nplaum nrog siab coercivity.
Kev tiv thaiv corrosion ntawm NdFeB
NdFeB cov khoom muaj cov ntsiab lus tsis tshua muaj hauv ntiaj teb, yooj yim oxidation, yooj yim corrosion. Hauv daim ntawv thov, tshwj tsis yog NdFeB yog encapsulated thiab cais tawm ntawm huab cua thiab dej, nws yog ib qho tsim nyog yuav tsum tau ua qhov kev tiv thaiv corrosion ntawm NdFeB. Cov txheej txheem tiv thaiv corrosion xws li npib tsib xee electroplating, electrogalvanizing thiab electrophoretic epoxy resin. Kev kho deg phosphating tuaj yeem ua lub luag haujlwm hauv qhov chaw qhuav ntawm NdFeB tiv thaiv corrosion rau lub sijhawm luv.