Nyob rau hauv dab tsi tej yam kev mob yuav neodymium hlau boron hlau nplaum demagnetize thiab demagnetize

Raws li ib txwm muaj, neodymium hlau boron hlau nplaum yeej tsis demagnetize, li no lawv hu ua cov hlau nplaum ruaj khov. Tom qab 100 xyoo ntawm kev tsim thiab molding, nws tsuas yog demagnetize los ntawm 2% -3%, uas yog sib npaug rau cov khoom siv hlau nplaum ruaj khov nyob rau hauv lub tshav pob ntawm lub cev muaj zog horn 3C cov khoom siv dav siv nrog neodymium hlau boron hlau nplaum. Txawm li cas los xij, neodymium hlau boron hlau nplaum tsis tuaj yeem yog cov hlau nplaum ruaj khov hauv qhov xwm txheej hnyav. Hauv qab no, peb sau thiab sau cov xwm txheej uas muaj zog neodymium hlau boron hlau nplaum tuaj yeem demagnetize thiab demagnetize.
1. Kub kub demagnetization.
Lub zog sib nqus ua haujlwm ntawm neodymium hlau boron hlau nplaum yog nruab nrab ntawm 60 thiab 200 degrees Celsius. Raws li kev ua haujlwm kub, lawv tuaj yeem faib ua N, M, H, SH, UH thiab lwm qib. Yog hais tias qhov sib thooj ua hauj lwm kub siab tshaj, lub neodymium hlau boron hlau nplaum yuav muaj demagnetization. Thaum cov hlau nplaum nyob hauv ib puag ncig qis dua qhov ua haujlwm kub tab sis ze rau qhov siab tshaj plaws ua haujlwm kub, lub zog sib nqus ntawm neodymium hlau boron cov hlau nplaum muaj zog kuj tuaj yeem txo qis li ntawm 2% -5%, tab sis lub zog sib nqus tuaj yeem rov qab zoo li qub. ib puag ncig txias. Yog tias qhov ntsuas kub ua haujlwm siab tshaj, mMagnetic quab yuam yuav raug irreversible lwj. Txawm tias tom qab ib puag ncig txias, lub zog sib nqus tsis tuaj yeem rov qab los. Raws li qhov kub thiab txias, tus nqi ntawm magnetic force decay yuav nrawm dua. Uas yog hais, cov hlau nplaum neodymium hlau boron yuav tsis tam sim ntawd demagnetize sai li sai tau raws li ib puag ncig tshaj qhov siab tshaj plaws kev khiav hauj lwm kub, tab sis yuav demagnetize ntawm ib tug tej yam ceev. Thaum cov hlau nplaum neodymium hlau boron tag nrho demagnetizes (tsis muaj hlau nplaum) ntawm qhov kub thiab txias rau lub sijhawm txaus, peb hu nws qhov kub ntawm Curie ntawm neodymium hlau boron hlau nplaum, uas nyob ib ncig ntawm 320-380 degrees Celsius.
2. cuam tshuam demagnetization
Thaum peb txuas nrog cov neeg siv khoom, peb yuav hais qhia rau lawv tias thaum siv cov hlau nplaum neodymium hlau boron, lawv yuav tsum tau ua tib zoo saib xyuas, thiab thaum sib dhos ua ke, lawv yuav tsum tau ua nrog mats thiab saib xyuas. Yog vim li cas tsis yog tsuas yog cov hlau nplaum neodymium hlau boron hlau nplaum yog nkig thiab tsis yooj yim, nrog lub zog sib nqus uas tuaj yeem ua rau tib neeg tau yooj yim, tab sis kuj muaj qhov cuam tshuam loj ntawm neodymium hlau boron hlau nplaum tuaj yeem ua rau demagnetization. Txawm hais tias cov hlau nplaum neodymium hlau boron tsis tawg, nws lub zog sib nqus yuav txo qis mus rau qhov sib txawv vim qhov tsis raug ntawm cov molecules hauv cov hlau nplaum los ntawm kev cuam tshuam loj heev.