B\u011b\u017en\u00ed spot\u0159ebitel\u00e9 maj\u00ed o nerezov\u00e9 oceli ur\u010dit\u00e9 nedorozum\u011bn\u00ed, mysl\u00ed si, \u017ee magnetick\u00e1 nerezov\u00e1 ocel nen\u00ed kvalifikovan\u00e1 jako nerezov\u00e1 ocel 304. Jak v\u00edme, podle struktury p\u0159i pokojov\u00e9 teplot\u011b lze nerezovou ocel rozd\u011blit na austenit jako 201, 304, 321, 316, 310, martenzit nebo \u017eelezit\u00fd jako 430, 420, 410. Austenity jsou nemagnetick\u00e9 nebo slab\u011b magnetick\u00e9 a martenzit nebo ferit jsou magnetick\u00e9. 304 je reprezentativn\u00ed t\u0159\u00edda austenitick\u00e9 nerezov\u00e9 oceli, m\u00e1 vynikaj\u00edc\u00ed zpracovatelnost, sva\u0159itelnost a odolnost proti korozi, p\u0159edstavuje 60% sv\u011btov\u00e9 spot\u0159eby nerezov\u00e9 oceli, obecn\u011b nen\u00ed magnetick\u00fd, ale n\u011bkdy je to magnetick\u00fd nebo slab\u00fd magnetismus zp\u016fsoben\u00fd taven\u00edm kol\u00eds\u00e1n\u00ed chemick\u00e9ho slo\u017een\u00ed nebo zpracov\u00e1n\u00ed, ale nem\u016f\u017eeme si myslet, \u017ee je to fale\u0161n\u00e9 nebo nestandardn\u00ed, jak\u00fd je to d\u016fvod?<\/p>\n
304 je metastabiln\u00ed nerezov\u00e1 ocel, je to jednoduch\u00e1 austenitov\u00e1 struktura po \u017e\u00edh\u00e1n\u00ed, bez magnetick\u00e9ho pole. Segregace tavn\u00e9 sm\u011bsi nebo nespr\u00e1vn\u00e9 tepeln\u00e9 zpracov\u00e1n\u00ed vytvo\u0159\u00ed mal\u00e9 mno\u017estv\u00ed martenzitick\u00e9 nebo feritov\u00e9 struktury, tak\u017ee se slab\u00fdm magnetick\u00fdm polem. Nav\u00edc po deformaci zpracov\u00e1n\u00edm za studena (jako je lisov\u00e1n\u00ed, protahov\u00e1n\u00ed, v\u00e1lcov\u00e1n\u00ed atd.) pro\u0161la \u010d\u00e1st struktury austenitu tak\u00e9 f\u00e1zovou zm\u011bnou (obecn\u00e1 mutageneze na martenzit) a magnetickou.<\/p>\n
Nap\u0159\u00edklad u stejn\u00e9 \u0161ar\u017ee ocelov\u00fdch p\u00e1s\u016f nem\u00e1 vn\u011bj\u0161\u00ed pr\u016fm\u011br 76mm ocelov\u00e9 trubky \u017e\u00e1dn\u00e9 zjevn\u00e9 magnetick\u00e9 pole, zat\u00edmco vn\u011bj\u0161\u00ed pr\u016fm\u011br 9,5mm ocelov\u00e9 trubky m\u00e1 zjevn\u00e9 magnetick\u00e9 pole. Magnetick\u00e9 vlastnosti \u010dtvercov\u00e9 pravo\u00fahl\u00e9 trubky jsou patrn\u011bj\u0161\u00ed, proto\u017ee deformace ohybem za studena je v\u011bt\u0161\u00ed ne\u017e u kruhov\u00e9 trubky, zejm\u00e9na v oh\u00fdban\u00e9 \u010d\u00e1sti.<\/p>\n
V\u011bt\u0161ina d\u0159ezu je vyrobena z nerezov\u00e9 oceli 304. Mnoho spot\u0159ebitel\u016f soud\u00ed, \u017ee je vyrobeno z nerezov\u00e9 oceli t\u0159\u00eddy 304 podle toho, zda je n\u00e1dr\u017e na vodu magnetick\u00e1 nebo ne. V sou\u010dasn\u00e9 dob\u011b existuje mnoho druh\u016f zpracovatelsk\u00fdch technologi\u00ed pro d\u0159ez, jako je tvarov\u00e1n\u00ed sva\u0159ov\u00e1n\u00edm, integr\u00e1ln\u00ed tvarov\u00e1n\u00ed v tahu atd., pokud se pou\u017e\u00edv\u00e1 tvarov\u00e1n\u00ed sva\u0159ov\u00e1n\u00edm materi\u00e1lu 304, je obecn\u011b \u017e\u00edh\u00e1no po zpracov\u00e1n\u00ed desky, nebude magnetick\u00e9 nebo slab\u011b magnetick\u00e9 (proto\u017ee povrchov\u00e9 \u00fapravy d\u0159ezu); Jedno z tvarov\u00e1n\u00ed vodn\u00ed n\u00e1dr\u017ee mus\u00ed proj\u00edt n\u011bkolika protahov\u00e1n\u00edm, celkov\u00fdm \u017e\u00edh\u00e1n\u00edm a pot\u00e9 protahov\u00e1n\u00edm (\u017e\u00edh\u00e1n\u00ed zvy\u0161uje n\u00e1klady a 304 nen\u00ed nutn\u00e9 znovu \u017e\u00edhat), bude to magnetick\u00e9, to je velmi norm\u00e1ln\u00ed jev.<\/p>","protected":false},"excerpt":{"rendered":"
B\u011b\u017en\u00ed spot\u0159ebitel\u00e9 maj\u00ed o nerezov\u00e9 oceli ur\u010dit\u00e9 nedorozum\u011bn\u00ed, mysl\u00ed si, \u017ee magnetick\u00e1 nerezov\u00e1 ocel nen\u00ed kvalifikovan\u00e1 jako nerezov\u00e1 ocel 304. Jak v\u00edme, podle struktury p\u0159i pokojov\u00e9 teplot\u011b lze nerezovou ocel rozd\u011blit na austenit jako 201, 304, 321, 316, 310, martenzit nebo \u017eelezit\u00fd jako 430, 420, 410. Austenity jsou nemagnetick\u00e9 [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2138","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/comments?post=2138"}],"version-history":[{"count":1,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2138\/revisions"}],"predecessor-version":[{"id":2139,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2138\/revisions\/2139"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media?parent=2138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/categories?post=2138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/tags?post=2138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}