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Wọle tabi Ṣẹda akọọlẹ kan
Aneodymium oofa(tun mọ biNdFeB,NIBtabiNeooofa) jẹ oriṣi ti a lo julọ titoje-aiye oofa.O jẹ ayẹ oofase lati ẹyaalloytineodymium,irin, atiboronlati ṣẹda Nd2Fe14Btetragonalkirisita be.Ni idagbasoke ominira ni 1984 nipasẹGbogbogbo MotorsatiSumitomo Special Awọn irin, awọn oofa neodymium jẹ iru oofa ayeraye ti o lagbara julọ ti o wa ni iṣowo.Awọn oofa NdFeB le jẹ tito lẹtọ bi sintered tabi so pọ, da lori ilana iṣelọpọ ti a lo.Wọn ti rọpo awọn iru oofa miiran ni ọpọlọpọ awọn ohun elo ni awọn ọja ode oni ti o nilo awọn oofa ayeraye to lagbara, gẹgẹbiina Motorsninu awọn irinṣẹ alailowaya,lile disk drivesati awọn fasteners oofa.
Awọn ohun-ini
Awọn ipele
Awọn oofa Neodymium jẹ iwọn ni ibamu si wọno pọju ọja agbara, eyi ti o jọmọ awọnoofa ṣiṣano wu fun kuro iwọn didun.Awọn iye ti o ga julọ tọkasi awọn oofa to lagbara.Fun sintered NdFeB oofa, nibẹ ni kan ni opolopo mọ okeere classification.Awọn iye wọn wa lati N28 soke si N55.Lẹta akọkọ N ṣaaju awọn iye jẹ kukuru fun neodymium, itumo sintered NdFeB oofa.Awọn lẹta ti o tẹle awọn iye tọkasi ifipabanilopo inu ati awọn iwọn otutu iṣẹ ṣiṣe ti o pọju (ni ibamu daradara pẹlu awọnCurie otutu), eyiti o wa lati aiyipada (to 80 °C tabi 176 °F) si TH (230 °C tabi 446 °F).
Awọn giredi ti awọn oofa NdFeB sintered:
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH - N48SH
- N30UH - N42UH
- N28EH - N40EH
- N28TH - N35TH
Awọn ohun-ini oofa
Diẹ ninu awọn ohun-ini pataki ti a lo lati ṣe afiwe awọn oofa ayeraye ni:
- Iduroṣinṣin(Br), eyi ti o ṣe iwọn agbara ti aaye oofa.
- Ifipaya(Hci), awọn ohun elo ká resistance si di demagnetized.
- Ọja agbara ti o pọju(BHo pọju), iwuwo ti agbara oofa, ti a ṣe afihan nipasẹ iye ti o pọju tioofa ṣiṣan iwuwo(B) igbaoofa aaye agbara(H).
- Curie otutu(TC), iwọn otutu ti ohun elo naa padanu oofa rẹ.
Awọn oofa Neodymium ni isọdọtun ti o ga julọ, agbara ti o ga pupọ ati ọja agbara, ṣugbọn nigbagbogbo dinku iwọn otutu Curie ju awọn iru awọn oofa miiran lọ.Awọn alloy oofa neodymium pataki ti o pẹluterbiumatidysprosiumti ni idagbasoke ti o ni iwọn otutu Curie ti o ga, gbigba wọn laaye lati farada awọn iwọn otutu ti o ga julọ. Tabili ti o wa ni isalẹ ṣe afiwe iṣẹ oofa ti awọn oofa neodymium pẹlu awọn oriṣi miiran ti awọn oofa ayeraye.
Ti ara ati darí-ini
| Ohun ini | Neodymium | Sm-Co |
|---|---|---|
| Iduroṣinṣin(T) | 1–1.5 | 0.8–1.16 |
| Ifipaya(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Ipadabọ ayeraye | 1.05 | 1.05–1.1 |
| Iṣiro-iwọn otutu ti isunmọ (%/K) | - (0.12–0.09) | - (0.05–0.03) |
| Iṣiro-iwọn otutu ti ifọkanbalẹ (%/K) | - (0.65–0.40) | - (0.30–0.15) |
| Curie otutu(°C) | 310–370 | 700–850 |
| Ìwúwo (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Gbona imugboroosi olùsọdipúpọ, ni afiwe si oofa (1/K) | (3–4)×10-6 | (5–9)×10-6 |
| Gbona imugboroosi olùsọdipúpọ, papẹndikula si magnetization (1/K) | (1–3)×10-6 | (10–13)×10-6 |
| Agbara Flexural(N/mm2) | 200–400 | 150–180 |
| Agbara titẹ(N/mm2) | 1000-1100 | 800-1000 |
| Agbara fifẹ(N/mm2) | 80–90 | 35–40 |
| Vickers líle(HV) | 500–650 | 400–650 |
| Itannaresistivity(Ω·cm) | (110–170)×10-6 | (50–90)×10-6 |
Akoko ifiweranṣẹ: Jun-05-2023