Magnetic particle soj ntsuam yog ib txoj kev tshawb nrhiav uas siv cov khoom ntawm ferromagnetic cov ntaub ntawv (xws li hlau, hlau, cobalt, npib tsib xee, thiab lwm yam) kom magnetized. Thaum lubhlau castingyog muaj zog magnetized los ntawm magnetic teb, yog hais tias muaj ib tug tsis xws luag perpendicular mus rau magnetization kev taw qhia nyob rau hauv lub nto los yog nyob ze ntawm lub casting, ib feem ntawm cov magnetic teb kab yuav overflow ntawm no, tsim ib tug leakage magnetic teb los tsim tshiab magnetic ncej. Nyob rau lub sijhawm no, qhov saum npoo ntawm cov casting yog nchuav nrog cov kua nplaum nplaum los yog cov hmoov sib nqus qhuav, thiab cov hmoov hlau nplaum sib nqus pom cov cim ntawm qhov tsis xws luag vim qhov kev nyiam ntawm cov hlau nplaum.
Thaum ua qhov kev tshuaj ntsuam xyuas cov khoom sib nqus ntawm cov hlau nplaum, cov hlau nplaum muaj zog feem ntau yog tsim los ntawm energizing. Raws li cov txheej txheem sib txawv ntawm cov energization thiab cov waveforms tam sim no, cov txheej txheem magnetization tuaj yeem muab faib ua cov hlau nplaum ncaj qha thiab tsis ncaj qha magnetization, DC magnetization thiab AC magnetization. Raws li cov kev taw qhia nyob rau hauv uas lub magnetic teb yog tsim thiab txoj kev los tsim lub magnetic teb, muaj magnetization txoj kev uas yuav muab faib ua circumferential magnetization thiab longitudinal magnetization, nruam magnetization thiab residual magnetization. Hauv kev tshuaj xyuas tiag tiag, lub hauv paus tuaj yeem xaiv ntau hom AC thiab DC sib xyaw ua ke ntawm cov hlau nplaum raws li qhov loj ntawm cov casting, kev faib tawm ntawm qhov tsis xws luag thiab lwm yam.
Cov hmoov hlau nplaum yog cov khoom siv uas tsim cov kab sib nqus thiab qhia qhov tsis xws luag, thiab nws cov khoom siv feem ntau yog cov hlau oxide uas muaj cov hlau nplaum sib nqus permeability, qis remanence thiab qis coercivity, xws li ferric oxide thiab ferric oxide. Qhov loj me me ntawm cov hmoov sib nqus yog qhov zoo dua 80 - 300 μm rau txoj kev kuaj nrog cov hmoov sib nqus qhuav. Rau kev tshuaj xyuas ntub thiab fluorescent, qhov loj me ntawm cov hmoov sib nqus tuaj yeem ua kom zoo dua. Cov teeb meem me me yuav tsum xaiv cov hmoov sib nqus zoo. Cov duab ntawm cov hmoov sib nqus yuav tsum yog cov hmoov sib nqus hlau nplaum, thiab tom qab ntawd sib xyaw nrog ib qho kev faib ua feem ntawm strip magnetic hmoov.
Sib nqus hmoov suspension yog sib tov ntawm magnetic hmoov thiab dispersion nyob rau hauv ib qho kev faib ua feem. Qhov ntim feem ntawm cov hmoov sib nqus zoo tib yam yog 1.3% - 3.0%, thiab qhov ntim feem ntawm fluorescent magnetic hmoov yog 0.1% - 0.3%. Cov kua dispersion tuaj yeem xaiv los ntawm tus neeg sawv cev dej, roj av thiab sib xyaw ntawm cov roj av thiab cov roj hloov pauv, uas muaj peev xwm tiv thaiv xeb, ntub dej thiab defoaming.
Yam ntxwv thiab Scope ntawm daim ntawv thov ntawm magnetic particle soj ntsuam:
1. Magnetic particle soj ntsuam muaj lub siab tshaj plaws rhiab heev rau kev soj ntsuam nto los yog ze-nto defects ntawm castings, tab sis nws rhiab heev yuav txo tau sai heev nrog rau qhov nce ntawm defect qhov tob.
2. Txoj kev tshawb nrhiav no tsuas yog siv tau rau kev tshawb nrhiav cov ntaub ntawv ferromagnetic, tab sis tsis tuaj yeem siv rau cov hlau tsis sib nqus xws li austenitic stainless hlau.
3. Cov cuab yeej ntawm kev tshuaj xyuas cov khoom sib nqus yog qhov yooj yim, thiab cov cuab yeej nqa tau yooj yim rau kev khiav lag luam ntawm qhov chaw.
4. Sib nqus particle soj ntsuam muaj ntau dua qhov yuav tsum tau ntawm roughness ntawm casting nto.
5. Tom qab kev tshuaj xyuas casting, nws yog ib qho tsim nyog yuav tsum tau ntxuav lub ntsej muag thiab tshem tawm cov hmoov hlau nplaum seem nyob rau lub sijhawm. Yog tias tsim nyog, yuav tsum tau kho demagnetization.
Post lub sij hawm: Sep-24-2022