Awọn ohun-ini oofa ti irin simẹnti grẹy yatọ si lọpọlọpọ, lati kekere permeability ati agbara ipaniyan giga si ayeraye giga ati ipa ipalọlọ kekere. Awọn ayipada wọnyi ni pataki dale lori microstructure ti irin simẹnti grẹy. Ṣafikun awọn eroja alloying lati gba awọn ohun-ini oofa ti o nilo jẹ aṣeyọri nipasẹ yiyipada eto ti grẹysimẹnti irin simẹnti.
| Awọn ohun-ini oofa ti Irin Simẹnti Grey | |||||||
| Code of Gray Iron | Iṣapọ Kemikali (%) | ||||||
| C | Si | Mn | S | P | Ni | Cr | |
| A | 3.12 | 2.22 | 0.67 | 0.067 | 0.13 | 03.03 | 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 |
| Awọn ohun-ini oofa | A | B | C | ||||
| Pearlite | Ferrite | Pearlite | Ferrite | Pearlite | Ferrite | ||
| Erogba Carbide w(%) | 0.70 | 0.06 | 0.77 | 0.11 | 0.88 | / | |
| Iduroṣinṣin / T | 0.413 | 0.435 | 0.492 | 0.439 | 0.5215 | 0.6185 | |
| Agbara ipa / A•m-1 | 557 | 199 | 716 | 279 | 637 | 199 | |
| Pipadanu Hysteresis / J•m-3•Hz-1 (B=1T) | 2696 | -696 | 2729 | 1193 | 2645 | 938 | |
| Agbara aaye oofa / kA•m-1 (B=1T) | 15.9 | -5.9 | 8.7 | 8.0 | 6.2 | 4.4 | |
| O pọju. Agbara oofa / μH•m-1 | 396 | Ọdun 1960 | 353 | 955 | 400 | Ọdun 1703 | |
| Oofa Field Agbara nigbati Max. Oofa Permeability / A• m-1 | 637 | 199 | 1035 | 318 | 1114 | 239 | |
| Resistivity / μΩ•m | 0.73 | 0.71 | 0.77 | 0.75 | 0.42 | 0.37 | |
Ferrite ni agbara oofa giga ati pipadanu hysteresis kekere; pearlite jẹ idakeji, o ni agbara oofa kekere ati pipadanu hysteresis nla. Pearlite ti wa ni akoso sinu ferrite nipasẹ annealing ooru itọju, eyi ti o le mu awọn se permeability nipa merin ni igba. Awọn irugbin ferrite ti o tobi si le dinku pipadanu hysteresis. Iwaju ti cementite yoo dinku iwuwo ṣiṣan oofa, permeability ati isọdọtun, lakoko ti o pọ si agbara ati pipadanu hysteresis. Iwaju graphite isokuso yoo dinku isọdọtun. Iyipada lati graphite A-type (graphite ti o ni irisi flake ti o pin ni iṣọkan laisi itọsọna) si graphite D-type (graphite ti o dara ti o dara pẹlu ipinfunni ti kii ṣe itọsọna laarin awọn dendrites) le ṣe alekun ifakalẹ oofa ati ipa ipaniyan ni pataki .
Ṣaaju ki o to de iwọn otutu to ṣe pataki ti kii ṣe oofa, iwọn otutu ga ni pataki mu agbara oofa ti irin simẹnti grẹy pọ si. Aaye Curie ti irin mimọ jẹ iwọn otutu iyipada α-γ ti 770°C. Nigbati ipin-ọpọlọpọ ohun alumọni jẹ 5%, aaye Curie yoo de 730°C. Iwọn aaye Curie ti cementite laisi silikoni jẹ 205-220°C.
Ẹya matrix ti awọn onipò ti o wọpọ ti irin simẹnti grẹy jẹ akọkọ pearlite, ati pe o pọju agbara wọn wa laarin 309-400 μH/m.
Akoko ifiweranṣẹ: Oṣu Kẹrin Ọjọ 17-2021