Cov khoom sib nqus ntawm grey cam khwb cia hlau sib txawv, los ntawm qis permeability thiab siab coercive quab yuam mus rau siab permeability thiab tsawg coercive quab yuam. Cov kev hloov no feem ntau yog nyob ntawm qhov microstructure ntawm grey cam khwb cia hlau. Ntxiv cov ntsiab lus alloying kom tau txais cov khoom sib nqus uas yuav tsum tau ua tiav los ntawm kev hloov cov qauv ntawm greyhlau castings.
| Magnetic Properties ntawm Grey Cast Iron | |||||||
| Code ntawm Grey Hlau | Chemical Composition (%) | ||||||
| C | Si | Mn | S | P | Ni | Cr | |
| A | 3.12 | 2.22 | 0.67 ib | 0.067 ib | 0.13 | 0.03 | 0.04 ib |
| B | 3.30 Nws | 2.04 Nws | 0.52 ib | 0.065 ib | 1.03 ib | 0.34 ib | 0.25 |
| C | 3.34 ib | 0.83-0.91 Nws | 0.20-0.33 Nws | 0.021-0.038 hli | 0.025-0.048 hli | 0.04 ib | 0.02 |
| Magnetic Properties | A | B | C | ||||
| Pearlite | Ferrite | Pearlite | Ferrite | Pearlite | Ferrite | ||
| Cov pa roj carbon monoxide (%) | 0.70 ib | 0.06 ib | 0.77 ib | 0.11 | 0.88 ib | / | |
| Remanence / T | 0.413 ib | 0.435 ib | 0.492 ib | 0.439 ib | 0.5215 ib | 0.6185 ib | |
| Coercive Force / A•m-1 | 557 ib | 199 | 716 ib | 279 | 637 ib | 199 | |
| Hysteresis Loss / J•m-3•Hz-1 (B=1T) | 2696 ib | -696 | 2729 ib | 1193 | 2645 ib | 938 ua | |
| Sib nqus Field Strength / kA•m-1 (B = 1T) | 15.9 ib | -5.9 | 8.7 ib | 8.0 ib | 6.2 | 4.4 | |
| Max. Sib nqus Permeability / μH•m-1 | ib 396 | Xyoo 1960 | 353 | 955 ua | 400 | 1703 ib | |
| Sib nqus Field Strength thaum Max. Sib nqus Permeability / A•m-1 | 637 ib | 199 | 1035 ib | 318 | 1114 | 239 | |
| Resistivity / μΩ•m | 0.73 ib | 0.71 ib | 0.77 ib | 0.75 ib | 0.42 ib | 0.37 ib | |
Ferrite muaj siab sib nqus permeability thiab qis hysteresis poob; pearlite tsuas yog qhov sib txawv, nws muaj qhov sib nqus permeability tsawg thiab loj hysteresis poob. Pearlite yog tsim rau hauv ferrite los ntawm kev kho cua sov, uas tuaj yeem ua kom cov hlau nplaum permeability los ntawm plaub zaug. Loj ferrite nplej tuaj yeem txo hysteresis poob. Lub xub ntiag ntawm cementite yuav txo qhov sib nqus flux ceev, permeability thiab remanence, thaum ua kom cov permeability thiab hysteresis poob. Lub xub ntiag ntawm ntxhib graphite yuav txo cov remanence. Kev hloov los ntawm A-type graphite (lub flake-shaped graphite uas yog uniformly faib tsis muaj kev taw qhia) mus rau D-hom graphite (ib tug zoo curled graphite nrog ib tug uas tsis yog-directional tis ntawm dendrites) muaj peev xwm ho nce lub magnetic induction thiab coercive quab yuam. .
Ua ntej mus txog qhov ntsuas kub tsis sib nqus, qhov kub thiab txias nce qhov sib nqus permeability ntawm grey cam khwb cia hlau. Curie point ntawm cov hlau ntshiab yog α-γ kev hloov pauv kub ntawm 770 ° C. Thaum qhov loj feem pua ntawm silicon yog 5%, Curie point yuav ncav cuag 730 ° C. Curie point kub ntawm cementite tsis muaj silicon yog 205-220 ° C.
Cov qauv matrix feem ntau siv qib ntawm grey cam khwb cia hlau feem ntau yog pearlite, thiab lawv cov permeability siab tshaj plaws yog nyob nruab nrab ntawm 309-400 μH / m.
Post lub sij hawm: Apr-17-2021