cov ntsiab lus (dysprosium Dy, terbium Tb) tsuas yog rau hauv thaj tsam lis ntawm sintered NdFeB hlau nplaum, tsis yog thoob plaws tag nrho cov hlau. Qhov no ua rau kom muaj kev sib koom ua ke (Hcj) los ntawm 5-10 kOe thaum siv 70-80% tsawg dua lub ntiaj teb uas tsis tshua muaj zog dua li cov pa alloying. Rau EV traction motors thiab industrial servos xav tau kev kub siab ruaj khov, GBD thev naus laus zis txo cov nqi khoom los ntawm 20-40% piv rau cov qib Dy-ntxiv. Phau ntawv qhia no piav qhia txog lub luag haujlwm ntawm Dy thiab Tb hauv kev tiv thaiv tshav kub, yuav ua li cas GBD ua haujlwm hauv sintered neodymium manufacturing, muab ntau cov ntaub ntawv sib piv cov txheej txheem piv rau GBD cov txheej txheem, thiab sib tham txog tus nqi optimization rau kev yuav khoom.
Lub luag haujlwm ntawm Dysprosium (Dy) thiab Terbium (Tb) hauv Kev Kub Kub Kub
Nyob rau hauv sintered NdFeB, lub ntsiab magnetic theem (Nd2Fe14B) muaj ib tug intrinsic coercivity ntawm tsuas yog ~ 10 kOe ntawm chav tsev kub. Txhawm rau kom ua tiav siab coercivity rau kev siv lub cev muaj zog, Dy lossis Tb ib feem hloov rau Nd hauv cov lattice, ua rau cov anisotropy teb (Ha) uas tiv thaiv demagnetization. Txhua 1% ntxiv ntawm Dy nce Hcj los ntawm kwv yees li 5-7 kOe tab sis txo Br los ntawm 0.3-0.5 kGs ib feem pua Dy, vim Dy muaj lub sijhawm sib nqus qis dua Nd.
Pa alloying ntxiv 3-8% Dy (los ntawm qhov hnyav) rau tag nrho cov hlau nplaum. Rau 50 MGOe qib N52, ntxiv 5% Dy txo Br los ntawm 14.5 kGs rau 13.8 kGs tab sis nce Hcj los ntawm 12 mus rau 18 kOe. Kev lag luam tawm: qhov tseem ceeb Br poob thiab tus nqi siab (Dy nqi $ 300-600 / kg, vs. Nd ntawm $ 80-150 / kg).
GBD Technology Ua Haujlwm li cas hauv Sintered Neodymium Manufacturing
GBDyog thov tom qab sintering thiab sib tsoo, tab sis ua ntej kawg magnetization. Cov txheej txheem txheej txheem:
Ntxuav lub sintered hlau nplaum nto (acid etch lossis ultrasonic tu).
Siv ib qho chaw diffusion: feem ntau yog Dy lossis Tb fluoride (xws li, DyF3, TbF3) hmoov sib xyaw nrog cov kuab tshuaj, lossis cov yeeb yaj kiab hlau sputtered.
Kev kho cua sov ntawm 800-950℃hauv lub tshuab nqus tsev lossis argon cua rau 4-12 teev. Lub ntiaj teb hnyav tsis tshua muaj diffuses raws li cov ciam teb (Nd-nplua nuj intergranular theem) thiab nkag mus rau cov hlau nplaum nto mus rau qhov tob ntawm 100-500μm (nyob ntawm qhov kub thiab txias).
Kev laus kev kho cua sov ntawm 450-550℃rau 2-4 teev kom zoo dua cov khoom sib nqus.
Kev sib tsoo kawg kom tshem tawm cov txheej txheem txheej txheej saum npoo (10-20μm) thiab siv txheej txheej.
Lub ntiaj teb tsis tshua muaj hnyav tshaj qhov chaw nyob ntawm thaj tsam ntawm cov qoob loo, tsim ib lub plhaub (Nd, Dy) 2Fe14B nyob ib ncig ntawm txhua cov nplej. Lub plhaub no ua rau thaj chaw anisotropy hauv zos, tiv thaiv kev rov qab sau npe nucleation- lub hauv paus txheej txheem rau demagnetization. Lub hauv paus ntawm txhua cov nplej tseem nyob Dy-dawb, khaws cia siab Br.
Diffusion qhov tob nyob ntawm cov hlau nplaum thickness. Rau hlau nplaum<10mm thick, GBD can fully penetrate through the thickness. For thicker magnets (>20mm), cov nyhuv yog concentrated nyob rau saum npoo, tsim ib tug "core-plhaub" qauv.
Kev sib piv: Pa Alloying vs. GBD Diffusion txheej txheem
| Parameter | Pa Alloy (ntxiv Dy kom yaj) | GBD Diffusion (tom qab -sintering) |
|---|---|---|
| Cov ntsiab lus Dy (wt%) | 3-8% (tag nrho cov hlau nplaum) | 0.5-1.5% (nyob ntawm thaj tsam lis) |
| Kev txhim kho Hcj (kOe) | +5 rau +20 (nyob ntawm Dy%) | +5 rau +12 (nrog 4-8x tsawg Dy) |
| Br poob (kGs) | -0.3 rau -0.5% Dy | -0.1 txog -0.2 rau % thov Dy (tsawg kawg) |
| Max kev khiav hauj lwm temp nce | +30 mus rau +80 degree | +20 mus rau +50 degree |
| Tus nqi khoom ib kg (kwv yees rau N42) | N42SH (3% Dy): 1.6-1.8x | N42SH-GBD (0.5% Dy): 1.2-1.3x |
| Kev coercivity uniformity | Uniform thoob plaws | Siab dua ntawm qhov chaw, qis hauv nruab nrab (gradient) |
| Haum hlau nplaum thickness | Tej thickness | Zoo tshaj rau<15mm thickness (full penetration) |
| Ntau lawm lub sij hawm | Standard (tsis muaj kauj ruam ntxiv) | +1-2 hnub (diffusion tshav kub kho) |
Piv txwv li: Rau EV lub cev muaj zog rotor siv 8 hli tuab hlau nplaum, GBD N42SH (Hcj=18 kOe) siv 0.8% Dy, ua tiav Hcj tib yam li cov pa N42SH (3.5% Dy). Cov hlau nplaum GBD khaws Br=13.2 kGs vs. cov pa 13.0 kGs (me ntsis siab dua), thiab raug nqi $42/kg vs. $58/kg rau cov pa.
Tus nqi optimization rau EV thiab Industrial Motor Procurement
For procurement teams, GBD magnets offer the best cost-performance trade-off for applications requiring Hcj >17 kOe thiab thickness<12mm. Grade selection matrix:
N42SH (GBD): Hcj 18-20 kOe, Br 13.2-13.5 kGs, nqi $40-48 / kg. Haum rau feem ntau EV thiab servo motors (100-150 degree).
N45UH (GBD): Hcj 22-24 kOe, Br 13.5-13.8 kGs, nqi $55-65/kg. Rau 150-180 degree, high-speed motors.
N48EH (GBD): Hcj 26-28 kOe, Br 13.8-14.0 kGs, nqi $75-90/kg. Rau 180-200 degree, aerospace lossis kev sib tw ua haujlwm siab.
Tsis yog-GBD N52 (tsis muaj Dy): Hcj 12-14 kOe, Br 14.5-14.8 kGs, nqi $45-55/kg. Tsuas yog rau<70°C applications.
We recommend GBD for any motor with continuous operating temperature >90 degree. Kev suav ROI: hloov los ntawm cov pa N42SH rau GBD N42SH txuag tau $ 8-12 ib kg. Rau 10kg rotor (20 hlau nplaum ntawm 0.5kg txhua), txuag $ 80-120 ib lub cev muaj zog. Ntawm 10,000 lub cev muaj zog / xyoo, nyiaj txuag txhua xyoo $ 800,000-1,200,000.
Rau GBD neodymium hlau nplaum haum rau EV thiab industrial motors, thov mus saib peb Sintered Neodymium Magnet thiab PMSM Tsav nplooj ntawv ntawm peb lub vev xaib.
Txhawm rau thov kev pom zoo qib thiab tus nqi kwv yees rau koj daim ntawv thov lub cev muaj zog, muab koj qhov ntsuas kub ntawm qhov ntsuas kub thiab qhov xav tau torque. Peb pab neeg ua haujlwm engineering muab GBD piv rau cov nqi ib txwm siv - kev txheeb xyuas cov txiaj ntsig.
Cov lus nug nquag
Q: GBD thev naus laus zis puas tuaj yeem siv rau txhua qib NdFeB, suav nrog N52?
A: Yog. Peb siv GBD rau qib N45-N52. Txawm li cas los xij, qib siab -Br qib muaj tsawg dua qhov muaj ciam ciam ntim rau qhov sib txawv, yog li qhov nce Hcj txwv rau +3-5 kOe (vs. +8-12 kOe rau N35-N42). Peb pom zoo N42SH-GBD rau feem ntau daim ntawv thov lub cev muaj zog.
Q: Dab tsi yog qhov hnyav nce los ntawm tus txheej txheem GBD?
A: Qhov hnyav nce los ntawm diffused hnyav tsis tshua muaj ntiaj teb yog 0.5-2.0% ntawm qhov hnyav hlau nplaum. Qhov no yog negligible rau ntau daim ntawv thov. Cov txheej txheem tsis hloov cov hlau nplaum sab nraud.
Q: Kuv yuav ua li cas thiaj paub tseeb tias kuv cov hlau nplaum tau txais yog GBD- kho thiab tsis zoo li qub?
A: Peb muab Dy/Tb muaj pes tsawg leeg daim ntawv qhia siv XRF (X-ray fluorescence) ntawm cov hlau nplaum nto vs. core. GBD hlau nplaum qhia Dy concentration siab dua ntawm qhov chaw tshaj qhov chaw (piv txwv li, 3% nto, 0.5% core). Cov hlau nplaum zoo sib xws muaj Dy thoob plaws.
