Mphamvu ya maginito ya chitsulo chotuwira chimasiyana mosiyanasiyana, kuyambira kutsika pang'ono komanso mphamvu yokakamiza kwambiri mpaka kulowera kwambiri komanso kutsika kokakamiza. Zosintha izi makamaka zimadalira mawonekedwe a chitsulo chotuwa. Kuwonjezera zinthu alloying kupeza zofunika maginito katundu zimatheka ndi kusintha kapangidwe imvizida zachitsulo.
| Magnetic Properties of Gray Cast Iron | |||||||
| Kodi Gray Iron | Kupanga Kwamankhwala (%) | ||||||
| C | Si | Mn | S | P | Ni | Cr | |
| A | 3.12 | 2.22 | 0.67 | 0.067 | 0.13 | ＜0.03 | 0.04 |
| B | 3.30 | 2.04 | 0.52 | 0.065 | 1.03 | 0.34 | 0.25 |
| C | 3.34 | 0.83 - 0.91 | 0.20 - 0.33 | 0.021 - 0.038 | 0.025 - 0.048 | 0.04 | ＜0.02 |
| Maginito Properties | A | B | C | ||||
| Pearlite | Ferrite | Pearlite | Ferrite | Pearlite | Ferrite | ||
| Mpweya wa Carbide w(%) | 0.70 | 0.06 | 0.77 | 0.11 | 0.88 | / | |
| Remanence / T | 0.413 | 0.435 | 0.492 | 0.439 | 0.5215 | 0.6185 | |
| Coercive Force / A•m-1 | 557 | 199 | 716 | 279 | 637 | 199 | |
| Hysteresis Loss / J•m-3•Hz-1 (B=1T) | 2696 | -696 | 2729 | 1193 | 2645 | 938 | |
| Mphamvu ya Magnetic Field / kA•m-1 (B=1T) | 15.9 | -5.9 | 8.7 | 8.0 | 6.2 | 4.4 | |
| Max. Maginito Permeability / μH•m-1 | 396 | 1960 | 353 | 955 | 400 | 1703 | |
| Mphamvu ya Magnetic Field pamene Max. Magnetic Permeability / A•m-1 | 637 | 199 | 1035 | 318 | 1114 | 239 | |
| Kukaniza / μΩ•m | 0.73 | 0.71 | 0.77 | 0.75 | 0.42 | 0.37 | |
Ferrite ali mkulu maginito permeability ndi otsika hysteresis imfa; pearlite ndizosiyana, zimakhala ndi maginito otsika kwambiri komanso kutaya kwakukulu kwa hysteresis. Pearlite amapangidwa kukhala ferrite ndi annealing kutentha mankhwala, amene angathe kuonjezera maginito permeability kanayi. Kukulitsa mbewu za ferrite kumachepetsa kutayika kwa hysteresis. Kukhalapo kwa simenti kudzachepetsa kachulukidwe ka maginito, kukhazikika komanso kukhazikika, ndikuwonjezera kutayika komanso kutayika kwa hysteresis. Kukhalapo kwa coarse graphite kumachepetsa kukhazikika. Kusintha kuchokera ku A-mtundu wa graphite (graphite yooneka ngati flake yomwe imagawidwa mofanana popanda chitsogozo) kupita ku D-mtundu wa graphite (graphite yopindika bwino ndi kugawa kosagwirizana pakati pa dendrites) ikhoza kuonjezera kwambiri kulowetsa maginito ndi mphamvu yokakamiza. .
Asanafike pa kutentha kosafunikira kwa maginito, kukwera kwa kutentha kumawonjezera mphamvu ya maginito yachitsulo chotuwira. Curie point of pure iron ndi kutentha kwa α-γ kwa 770°C. Pamene kuchuluka kwa silicon ndi 5%, Curie point idzafika 730 ° C. Kutentha kwa Curie point kwa simenti popanda silicon ndi 205-220 ° C.
Maonekedwe a matrix omwe amagwiritsidwa ntchito nthawi zambiri achitsulo chotuwira chotuwira amakhala makamaka pearlite, ndipo kuthekera kwawo kokwanira kuli pakati pa 309-400 μH/m.
Nthawi yotumiza: Apr-17-2021