Neodymium hlau nplaum blocks, muaj feem ntau ntawm neodymium (Nd), hlau (Fe), thiab boron (B), feature ib tug tshwj xeeb Nd₂Fe₁₄B tetragonal siv lead ua qauv uas generates magnetic teb tshaj tsib zaug muaj zog tshaj li niaj hnub ferrite hlau nplaum. Nrog neodymium suav nrog 25-35%, hlau 65-75%, thiab boron kwv yees li 1% ntawm qhov muaj pes tsawg leeg, cov hlau nplaum no tau txais qhov tshwj xeeb sib nqus kev ua tau zoo: cov khoom siv hluav taws xob sib nqus feem ntau yog li ntawm 45-55 MGOe, ntau dua samarium-cobalt (30 MGOe) thiab ferrite hlau nplaum (4 M. Lub coercivity ntawm NdFeB hlau nplaum tuaj yeem ncav cuag siab tshaj 2000 kA / m, muab peb zaug zoo dua tiv thaiv demagnetization piv rau cov hlau nplaum.
Cov qib kev ua tau zoo ntawm cov hlau nplaum neodymium ua raws li tus qauv nomenclature uas cov lej qhia txog cov khoom siv hluav taws xob ntau tshaj plaws thiab cov ntawv qhia txog kev ua haujlwm kub. Piv txwv li, N52 sawv cev rau cov khoom siv hluav taws xob sib nqus zoo tsim nyog rau qhov chaw- txwv tsis pub siv, thaum qib SH thiab UH suav nrog cov khoom hnyav tsis tshua muaj - hauv ntiaj teb xws li dysprosium (Dy) thiab terbium (Tb) kom ua tiav kev ua haujlwm ruaj khov ntawm qhov kub siab txog 200℃rau kev thov kev siv xws li lub cev muaj zog. Cov txheej txheem thev naus laus zis tsis ntev los no nyob rau hauv cov txheej txheem sib txawv ntawm cov kab lis kev cai tau ua rau cov tuam txhab lag luam txo qis hnyav tsis tshua muaj - hauv ntiaj teb noj los ntawm 30-70% thaum tswj lossis txawm tias txhim kho cov khoom sib nqus, txo cov nqi tsim khoom thiab txo kev cia siab ntawm cov peev txheej tsawg.
Kev tsim khoom ntawm sintered neodymium hlau nplaum ua raws li cov txheej txheem hmoov hlau metallurgy: raw khoom melting thiab sawb casting, hydrogen decrepitation, dav hlau milling los tsim cov hmoov zoo (3-4 μm), sib nqus teb orientation nias, txias isostatic nias, nqus sintering, kho cua sov, txheej txheej, thiab hlau nplaum. Cov txheej txheem meej no ua kom pom qhov zoo ntawm crystallographic alignment thiab densification, maximizing magnetic kev ua tau zoo. Xwb, sib txuas neodymium hlau nplaum tsim los ntawm compression lossis txhaj tshuaj molding muab cov duab nyuaj thiab nruj dua qhov ntev, tab sis nrog cov khoom siv hluav taws xob qis dua nyob ib ncig ntawm 16 MGOe.
Hauv cov ntsiab lus ntawm cov khoom sib nqus sib nqus, neodymium hlau nplaum blocks ua cov khoom tseem ceeb tsim cov hlau nplaum muaj zog uas ntes thiab tshem tawm cov kab mob ferrous los ntawm cov khoom ntws. Lawv cov coercivity siab ua kom muaj kev ruaj ntseg txawm tias nyob rau hauv ib puag ncig nyuaj nrog kev co, cuam tshuam, thiab kub hloov pauv. Rau cov ntawv thov uas yuav tsum tau muaj lub zog sib nqus zoo sib xws dhau qhov kev ua haujlwm ntev ntev, hwm qib - qib, thermally ruaj khov NdFeB hlau nplaum nrog siab intrinsic coercivity lav txhim khu kev ruaj ntseg tiv thaiv rau conveyor siv thiab cov khoom siv downstream hauv mining, recycling, thiab bulk khoom tuav haujlwm.
Kev thov thoob ntiaj teb rau cov hlau nplaum neodymium txuas ntxiv nce ntxiv, uas tau tsav los ntawm kev nthuav dav sai ntawm lub tsheb hluav taws xob (siv 2-5 kg ib lub tsheb), cua zog tsim hluav taws xob (txog 600 kg ntawm ntug dej hiav txwv turbine), thiab cov ntawv thov kev lag luam automation . Kev ua lag luam tau mus txog kwv yees li $ 16.6 nphom hauv 2024 thiab tau kwv yees tias yuav loj hlob ntawm kev loj hlob txhua xyoo ntawm 6.3% txog 2033, nrog Tuam Tshoj tswj hwm kev tswj hwm hauv kev tsim khoom, suav txog ntau dua 75% ntawm cov khoom siv thoob ntiaj teb. Rau cov chaw tsim khoom ntawm cov khoom sib nqus sib nqus, kev nkag siab txog neodymium hlau nplaum thev naus laus zis yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog uas ua kom zoo dua qub, ua haujlwm ntev, thiab kev siv nyiaj ntau hauv kev siv ntau yam.
