Vim hais tias ntawm ntau cov ntaub ntawv ntawm ntau hlau nplaum, cov txheej txheem tsim kuj txawv. Ntau lub tshuab electromagnets yog tsim los ntawm cov qauv siv hlau tshuab. Sleev hlau nplaum magnet yog tsim los ntawm cov txheej txheem yas txheej txheem. Thaum lub sij hawm, cov khoom yog tov, rhuab thiab yuam los ntawm ib tug qhib qhib nyob rau hauv siab.
Kev paub cov hmoov hlau metallurgy tuaj yeem siv los tsim ib co hlau nplaum hauv cov hmoov hlau zoo uas raug rau siab, cua sov thiab sib nqus quab yuam kom tsim tau cov hlau nplaum kawg. Qhov no yog cov txheej txheem hmoov hlau metallurgy ua rau NdFeB nruam hlau nplaum nrog ib seem ntawm 3-10 square inches (20 ~ 65 square centimeters):
1.Preparation ntawm Powdered Metal
Cua kub ib qho tsim nyog ntawm neodymium, hlau thiab bor boron nyob rau hauv ib lub tshuab nqus tsev. Nqus plua plav tiv thaiv cov tshuaj lom neeg ntawm cov huab cua thiab cov khoom ua pa uas ua rau paug cov hlau hlau.
Thaum cov hlau tau txias thiab raug khov, nws yuav tawg thiab smashed rau hauv me me. Tom qab ntawd lub me me pieces yog hauv av mus rau hauv zoo hmoov nyob rau hauv lub pob zeb.
2. nrawm
Cov hmoov hlau yog muab tso rau hauv cov pwm, nrog nws ntev thiab dav (los yog kab, cov ntawv hlau khawm) ua tiav cov hlau nplaum. Sib zog txhawm dag yog siv rau cov khoom siv hmoov txhawm rau ua kom cov hmoov sib xyaw kom haum. Nyob rau tib lub sijhawm, qhov sib nqus sib nqus tau siv, hmoov yog compacted by hydraulic los yog mechanical compaction los ntawm sab saum toj thiab hauv qab, thiab compresses nws mus txog 0,125 nti (0.32 centimeters) ntawm qhov kev cia siab zaum kawg. Raug siab yog li 10000 psi rau 15000 psi (70 MPa mus rau 100 MPa). Qee cov duab yuav muab tso rau hauv cov ntaub ntawv los ntawm qhov muab cov khoom siv hmoov txhuam rau hauv lub yoojyim, airtight, cov thawv nqus thiab siv cov kua los yog cov pa roj. Qhov no yog qhov kev sibtham yog qhov siab.
3.Haiv
Tshem cov npluav ntawm lub khob thiab muab tso rau hauv qhov cub. Cov txheej txheem ntawm hloov compressed hmoov hlau ua molten cov hlau yog hu ua sintering. Cov txheej txheem no feem ntau muaj peb theem. Nyob hauv thawj theem, cov khoom siv sib xyaw kom sov yog kub hauv qis kom maj mam tsav cov pa ya lossis lwm yam kabmob uas tej zaum yuav raug clamped rau txheej txheem extrusion. Nyob rau theem ob, qhov kub ntawd nce mus txog 70% -90% ntawm cov hlau txhaws teeb meem thiab nws tseem nyob rau ob peb xuab moos los yog hnub kom cia me me kom haum fuse ua ke. Thaum kawg, cov khoom yog maj mam txias los ntawm kev tswj theem nce incremental.
4.Annealing
Sintered cov ntaub ntawv yog tom qab raug thib ob tswj cua sov thiab cua txias, paub tias yog kev sib ntxub. Txoj kev no tshem tawm txhua qhov kev ntxhov siab nyob hauv cov khoom thiab ntxiv dag zog rau nws.
5.Nlawm
Cov khoom tom qab lub siab tseem nyob ze rau qhov kev xav tau thiab qhov loj me. Qhov teeb meem no yog hu ua qhov "net net". Lub txheej txheem kawg tshem cov khoom siv tawm ntau thiab ua kom cov pob zuaj ntawm qhov chaw uas tsim nyog. Tom qab ntawd muab kev tiv thaiv rau cov khoom kom ntub dej.
6.Magnetization
Li ntawd, nyob deb, cov khoom siv tsuas yog ib qho ntawm cov hlau nchuav thiab yaj. Txawm hais tias nws tau raug rau kev sib nqus quab yuam thaum lub sij hawm kev nias, lub zog tsis magnetize cov khoom, nws tsuas yog teev cov xoob hmoov ua ke. Yuav kom tig mus rau hauv ib lub hlau nplaum, lub chip muab tso rau nruab nrab ntawm lub ncej ntawm ib lub tshuab muaj zog heev thiab muaj taw qhia nyob rau hauv qhov yuav tsum tau ua kom tau qhov magnetization. Tom qab ntawd lub electromagnetic hlau yog electrified rau ib lub sij hawm ntawm lub sij hawm. Sib nqus rog tswj atoms lossis magnetic domains nyob rau hauv ib qho khoom rau hauv ib qho chaw ruaj khov magnet.