{"id":750,"date":"2017-08-19T08:50:59","date_gmt":"2017-08-19T08:50:59","guid":{"rendered":"http:\/\/wldstainless.com\/?p=750"},"modified":"2020-09-15T07:58:02","modified_gmt":"2020-09-15T07:58:02","slug":"why-the-stainless-steel-pipe-need-solution-annealing","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/cs\/why-the-stainless-steel-pipe-need-solution-annealing\/","title":{"rendered":"Pro\u010d trubky z nerezov\u00e9 oceli pot\u0159ebuj\u00ed rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed?"},"content":{"rendered":"<p>Rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed je tak\u00e9 ozna\u010dov\u00e1no jako rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed karbid\u016f, je proces, kter\u00fd oh\u0159\u00edv\u00e1 pracovn\u00ed \u010d\u00e1st na 1010 \u00b0C nebo v\u00edce, aby se odstranila sra\u017eenina karbidu (uhl\u00edk z tuh\u00e9ho roztoku nerezov\u00e9 oceli), a pak je to rychl\u00e9 ochlazen\u00ed, obvykle kalen\u00ed vodou a karbid se vr\u00e1til do tuh\u00e9ho roztoku nerezov\u00e9 oceli. O\u0161et\u0159en\u00ed rozpou\u0161t\u011bc\u00edm \u017e\u00edh\u00e1n\u00edm lze aplikovat na legovanou ocel a nerezovou ocel. Pro <a href=\"https:\/\/wldstainless.com\/materials\/austenitic-stainless-steel\/304-304l-stainless-steel\/\"><em>304 nerezov\u00e1 ocel<\/em> <\/a>odlitk\u016f, roztokov\u00e9 zpracov\u00e1n\u00ed m\u016f\u017ee vytvo\u0159it jednotnou mikrostrukturu bez karbidov\u00fdch ne\u010distot. Obecn\u011b se trubka z nerezov\u00e9 oceli zah\u0159\u00edv\u00e1 na asi 950 ~ 1150 \u2103 po dlouhou dobu, aby se karbid a r\u016fzn\u00e9 legovac\u00ed prvky \u00fapln\u011b a rovnom\u011brn\u011b rozpustily v austenitu, a pot\u00e9 se rychle ochlad\u00ed vodou, aby se z\u00edskala \u010dist\u00e1 struktura austenitu d\u00edky uhl\u00edku a jin\u00e9mu legov\u00e1n\u00ed. prvky do pozdn\u00edch sr\u00e1\u017eek. Nab\u00edz\u00ed se ot\u00e1zka, pro\u010d nerezov\u00e1 trubka pot\u0159ebuje rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed? Nejprve byste m\u011bli zn\u00e1t funkci procesu rozpou\u0161t\u011bc\u00edho \u017e\u00edh\u00e1n\u00ed.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-1763 aligncenter\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2017\/08\/Solid-solution-heat-treatment-furnace.jpg\" alt=\"\" width=\"500\" height=\"322\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2017\/08\/Solid-solution-heat-treatment-furnace.jpg 500w, https:\/\/wldstainless.com\/wp-content\/uploads\/2017\/08\/Solid-solution-heat-treatment-furnace-300x193.jpg 300w, https:\/\/wldstainless.com\/wp-content\/uploads\/2017\/08\/Solid-solution-heat-treatment-furnace-450x290.jpg 450w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Jednotn\u00e1 metalografick\u00e1 struktura<\/strong><\/p>\n<p>To je d\u016fle\u017eit\u00e9 zejm\u00e9na u surovin. Nekonzistence v teplot\u011b v\u00e1lcov\u00e1n\u00ed a rychlosti ochlazov\u00e1n\u00ed ocelov\u00fdch trubek v\u00e1lcovan\u00fdch za tepla zp\u016fsobuj\u00ed stejn\u00e9 d\u016fsledky v konstrukci. Kdy\u017e se atomov\u00e1 aktivita zvy\u0161uje p\u0159i vysok\u00fdch teplot\u00e1ch, \u03c3 se rozpou\u0161t\u00ed a chemick\u00e9 slo\u017een\u00ed m\u00e1 tendenci b\u00fdt jednotn\u00e9, pak se po rychl\u00e9m ochlazen\u00ed z\u00edsk\u00e1 jednotn\u00e1 jednof\u00e1zov\u00e1 struktura.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Eliminace ztvrdnut\u00ed pr\u00e1ce<\/strong><\/p>\n<p>O\u0161et\u0159en\u00ed pevn\u00fdm roztokem obnovuje zkroucenou m\u0159\u00ed\u017eku a rekrystalizuje rozbit\u00e9 zrno. Vnit\u0159n\u00ed pnut\u00ed a pevnost v tahu ocelov\u00e9 trubky se sni\u017euj\u00ed, zat\u00edmco rychlost prodlou\u017een\u00ed se zvy\u0161uje, aby se usnadnilo nep\u0159etr\u017eit\u00e9 zpracov\u00e1n\u00ed za studena.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Zv\u00fd\u0161en\u00e1 odolnost proti korozi<\/strong><\/p>\n<p>Korozn\u00ed odolnost nerezov\u00e9 oceli kles\u00e1 s precipitac\u00ed karbidu a korozn\u00ed odolnost ocelov\u00fdch trubek se vrac\u00ed k nejlep\u0161\u00edm po o\u0161et\u0159en\u00ed pevn\u00fdm roztokem. Teplota, doba v\u00fddr\u017ee a rychlost ochlazov\u00e1n\u00ed jsou nejd\u016fle\u017eit\u011bj\u0161\u00edmi faktory p\u0159i rozpou\u0161t\u011bn\u00ed nerezov\u00e9 oceli.<\/p>\n<p>Teplota tuh\u00e9ho roztoku z\u00e1vis\u00ed na chemick\u00e9m slo\u017een\u00ed. Obecn\u011b \u0159e\u010deno, teplota tuh\u00e9ho roztoku by m\u011bla b\u00fdt odpov\u00eddaj\u00edc\u00edm zp\u016fsobem zv\u00fd\u0161ena pro jakost s v\u00edce legovan\u00fdmi prvky a vysok\u00fdm obsahem, zejm\u00e9na pro ocel s vysok\u00fdm obsahem manganu, molybdenu, niklu a k\u0159em\u00edku. Pouze zv\u00fd\u0161en\u00edm teploty tuh\u00e9ho roztoku a jeho \u00fapln\u00fdm rozpu\u0161t\u011bn\u00edm lze dos\u00e1hnout zm\u011bk\u010duj\u00edc\u00edho \u00fa\u010dinku.<\/p>\n<p>Existuj\u00ed v\u0161ak v\u00fdjimky, nap\u0159\u00edklad 316Ti. P\u0159i vysok\u00e9 teplot\u011b tuh\u00e9ho roztoku se karbid stabilizovan\u00fdch prvk\u016f zcela rozpust\u00ed v austenitu, kter\u00fd se na hranici zrn vysr\u00e1\u017e\u00ed ve form\u011b Cr23C6 a p\u0159i n\u00e1sledn\u00e9m ochlazen\u00ed zp\u016fsob\u00ed mezikrystalovou korozi. Ni\u017e\u0161\u00ed teplota tuh\u00e9ho roztoku se doporu\u010duje, aby se zabr\u00e1nilo rozkladu karbid\u016f (TiC a Nbc) stabiliza\u010dn\u00edch prvk\u016f a tuh\u00e9ho roztoku.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed je tak\u00e9 ozna\u010dov\u00e1no jako rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed karbid\u016f, je proces, kter\u00fd oh\u0159\u00edv\u00e1 pracovn\u00ed \u010d\u00e1st na 1010 \u00b0C nebo v\u00edce, aby se odstranila sra\u017eenina karbidu (uhl\u00edk z tuh\u00e9ho roztoku nerezov\u00e9 oceli), a pak je to rychl\u00e9 ochlazen\u00ed, obvykle kalen\u00ed vodou a karbid se vr\u00e1til do tuh\u00e9ho roztoku nerezov\u00e9 oceli. O\u0161et\u0159en\u00ed rozpou\u0161t\u011bc\u00edm \u017e\u00edh\u00e1n\u00edm [\u2026]<\/p>","protected":false},"author":1,"featured_media":929,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-750","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/750","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=750"}],"version-history":[{"count":8,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/750\/revisions"}],"predecessor-version":[{"id":1764,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/750\/revisions\/1764"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media\/929"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media?parent=750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/categories?post=750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/tags?post=750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}