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Magnetstål - Versionshistorik
2026-11-06T15:41:03Z
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https://wiki.guldforum.se/w/index.php?title=Magnetst%C3%A5l&diff=12683&oldid=prev
Dan Olsson den 2 mars 2013 kl. 19.46
2013-03-02T19:46:29Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Versionen från 2 mars 2013 kl. 14.46</td>
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Dan Olsson
https://wiki.guldforum.se/w/index.php?title=Magnetst%C3%A5l&diff=7287&oldid=prev
Dan Olsson: 1 version
2013-02-24T14:13:44Z
<p>1 version</p>
<p><b>Ny sida</b></p><div>[[File:Grain-oriented electrical steel (grains).jpg|thumb|Kristaller I yta av kornorienterat magnetstål]]<br />
<br />
'''Magnetstål''' är beteckning för olika stålsorter, som används till [[magnet]]er.<br />
<br />
För ankare och kärnor i [[generator]]er och [[transformator]]er, vars magnetism snabbt växlar, används ofta mjukt kiselstål med mindre än 0,1 % [[kol]] och 0,5 – 4 % [[kisel]].<br />
<br />
För permanenta magneter, som efter kraftig magnetisering skall kunna ges största möjliga [[magnetism]] och behålla denna konstant sedan det magnetiserande fältets verkan upphört, används kromstål med ca 1 % kol och 1,5 – 3 % [[krom]], volframstål med ca 0,7 % kol och 5 – 6 % [[volfram]] eller krom-kobolt-molybden-stål med ca 1 % kol, 4 – 9 % krom, 6 – 40 % [[kobolt]] och ca 1 % [[molybden]]. Dessa förekommer i många sammanhang inom både starkströms- och svagströmstekniken.<br />
<br />
Bland stål med speciella magnetiska egenskaper kan nämnas t ex [[permalloy]], ett nickelstål med 78,5 % [[nickel]], vilket har stor permeabilitet vid låg magnetisering, och som bl a kan användas för reläer och hörapparater. Hit kan också räknas [[aluminium]]- och nickel-[[järn]]legeringar, som kan ges hög koercitivkraft.<br />
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==Källor==<br />
Meyers varulexikon, Forum, 1952<br />
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[[Kategori:Järnföreningar]]<br />
[[Kategori:Elektroteknik]]<br />
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[[ca:Acer elèctric]]<br />
[[cs:Trafoplech]]<br />
[[de:Elektroblech]]<br />
[[en:Electrical steel]]<br />
[[es:Acero eléctrico]]<br />
[[fr:Fer doux]]<br />
[[hi:सिलिकन इस्पात]]<br />
[[kk:Электротехникалық болат]]<br />
[[nl:Weekijzer]]<br />
[[ja:ケイ素鋼]]<br />
[[pl:Blacha elektrotechniczna]]<br />
[[ru:Электротехническая сталь]]<br />
[[vi:Thép silic]]</div>
Dan Olsson