Alloy20 (N08020) je austenitick\u00e1 superslitina na b\u00e1zi nikl-\u017eelezo-chrom s vynikaj\u00edc\u00ed odolnost\u00ed proti celkov\u00e9, mezikrystalov\u00e9, d\u016flkov\u00e9 a \u0161t\u011brbinov\u00e9 korozi v chemik\u00e1li\u00edch obsahuj\u00edc\u00edch chloridy, kyselinu s\u00edrovou, kyselinu fosfore\u010dnou a kyselinu dusi\u010dnou. Jeho odolnost proti korozi je dobr\u00e1 mezi 316L a Hastelloy a nen\u00ed tak dobr\u00e1 jako nerezov\u00e1 ocel 316L v n\u011bkter\u00fdch aminov\u00fdch roztoc\u00edch, proto\u017ee je snadn\u00e9 vytv\u00e1\u0159et komplexy niklu a amonia.<\/p>\n
Krom\u011b toho m\u00e1 dobr\u00e9 tv\u00e1\u0159en\u00ed za studena a sva\u0159itelnost a\u017e do 500\u2103. N\u00edzk\u00fd obsah uhl\u00edku a p\u0159\u00eddavek niobu pom\u00e1haj\u00ed sni\u017eovat sr\u00e1\u017een\u00ed karbid\u016f v z\u00f3n\u011b ovlivn\u011bn\u00e9 HEAT, tak\u017ee jej lze ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f pou\u017e\u00edt ve sva\u0159ovan\u00e9m stavu.<\/p>\n
Ji\u017e dlouhou dobu se mnoho lid\u00ed dohaduje: Je Alloy 20 nerezov\u00e1 ocel nebo slitina niklu? Proto\u017ee se jejich obsah niklu 32-38% bl\u00ed\u017e\u00ed 36%, hranice mezi nerezovou ocel\u00ed a slitinami na b\u00e1zi niklu st\u00edr\u00e1 klasifikaci materi\u00e1l\u016f. Obecn\u011b plat\u00ed, \u017ee slitina20 je slitina niklu. Nov\u00e9 vyd\u00e1n\u00ed ASTM A240 obsahuje slitinu 20, kter\u00e1 podporuje, \u017ee slitiny 20 byly z boku klasifikov\u00e1ny jako nerezov\u00e1 ocel. Desky Alloy20 jsou v souladu s ASTM B463, ASME SB463. Stejn\u00e9 materi\u00e1ly jako N08904 (904L), N08926 (1,4529) atd. byly d\u0159\u00edve klasifikov\u00e1ny ve standardn\u00ed \u0159ad\u011b ASTM B slitiny niklu.<\/p>\n
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Alloy20 m\u00e1 spole\u010dn\u00e9 vlastnosti niklov\u00e9 slitiny, pokud jde o sva\u0159ovac\u00ed vlastnosti, to znamen\u00e1, \u017ee p\u0159i sva\u0159ov\u00e1n\u00ed obecn\u011b nevytv\u00e1\u0159\u00ed studen\u00e9 trhliny a je n\u00e1chyln\u011bj\u0161\u00ed k vytv\u00e1\u0159en\u00ed hork\u00fdch trhlin. Kv\u016fli niklu a s\u00ed\u0159e m\u016f\u017ee fosfor tvo\u0159it eutektikum s n\u00edzk\u00fdm bodem t\u00e1n\u00ed, p\u0159i tuhnut\u00ed se \u010dasto vytvo\u0159\u00ed hust\u00fd krystal dendritick\u00e9ho austenitu, ne\u010distota s n\u00edzkou teplotou t\u00e1n\u00ed se s v\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed zam\u011b\u0159\u00ed na hranici zrn, velikost zrna a \u00fa\u010dinek nap\u011bt\u00ed tuhnut\u00ed, smr\u0161\u0165ov\u00e1n\u00ed a nap\u011bt\u00ed p\u0159i sva\u0159ov\u00e1n\u00ed, nikoli zcela tuhnut\u00ed hranice zrn materi\u00e1lu s n\u00edzk\u00fdm bodem t\u00e1n\u00ed je snadn\u00e9 k prask\u00e1n\u00ed tvorby hork\u00e9 trhliny, tak\u017ee by m\u011bl p\u0159\u00edsn\u011b kontrolovat obsah s\u00edry a fosforu ve sva\u0159ovac\u00edm materi\u00e1lu.<\/p>\n
Alloy 20 m\u00e1 vynikaj\u00edc\u00ed odolnost proti korozn\u00edmu prask\u00e1n\u00ed pod nap\u011bt\u00edm, dobrou odolnost proti m\u00edstn\u00ed korozi, uspokojivou odolnost proti korozi v mnoha chemick\u00fdch procesn\u00edch m\u00e9di\u00edch, plynn\u00e9m chl\u00f3ru a v\u0161ech druz\u00edch m\u00e9di\u00ed obsahuj\u00edc\u00edch chlorid, such\u00fd plynn\u00fd chlor, kyselinu mraven\u010d\u00ed a octovou, anhydrid, mo\u0159skou vodu a slanou vodu, atd. Sou\u010dasn\u011b se korozi kompozitn\u00edch m\u00e9di\u00ed sni\u017euj\u00edc\u00ed oxidaci slitiny 20 \u010dasto pou\u017e\u00edv\u00e1 v prost\u0159ed\u00ed kyseliny s\u00edrov\u00e9 a obsahuj\u00edc\u00ed halogenov\u00e9 ionty a kovov\u00e9 ionty v roztoku kyseliny s\u00edrov\u00e9, jako je hydrometalurgie a pr\u016fmyslov\u00e1 za\u0159\u00edzen\u00ed kyseliny s\u00edrov\u00e9.<\/p>\n
Slitina 20, kter\u00e1 byla poprv\u00e9 vyvinuta v roce 1951 pro pou\u017eit\u00ed v kyselin\u011b s\u00edrov\u00e9, je preferovanou slitinou pro pr\u016fmyslov\u00e9 prost\u0159ed\u00ed s kyselinou s\u00edrovou. Ve vrouc\u00ed kyselin\u011b s\u00edrov\u00e9 20% ~ 40% vykazuje vynikaj\u00edc\u00ed odolnost proti prask\u00e1n\u00ed koroz\u00ed pod nap\u011bt\u00edm a je vynikaj\u00edc\u00edm materi\u00e1lem pro mnoho pr\u016fmyslov\u00fdch odv\u011btv\u00ed, jako je chemick\u00fd pr\u016fmysl, potravin\u00e1\u0159sk\u00fd pr\u016fmysl, farmaceutick\u00fd pr\u016fmysl a plasty. M\u016f\u017ee b\u00fdt pou\u017eit ve v\u00fdm\u011bn\u00edc\u00edch tepla, sm\u011b\u0161ovac\u00edch n\u00e1dr\u017e\u00edch, za\u0159\u00edzen\u00edch na \u010di\u0161t\u011bn\u00ed a mo\u0159en\u00ed kov\u016f a potrub\u00ed. Alloy 20 lze tak\u00e9 pou\u017e\u00edt v za\u0159\u00edzen\u00edch na v\u00fdrobu syntetick\u00e9ho kau\u010duku, farmaceutick\u00fdch v\u00fdrobc\u00edch, plastech, organick\u00e9m a t\u011b\u017ek\u00e9m chemick\u00e9m zpracov\u00e1n\u00ed, skladovac\u00edch n\u00e1dr\u017e\u00edch, potrub\u00ed, v\u00fdm\u011bn\u00edc\u00edch tepla, \u010derpadlech, ventilech a dal\u0161\u00edch technologick\u00fdch za\u0159\u00edzen\u00edch, mo\u0159ic\u00edch za\u0159\u00edzen\u00edch, potrub\u00edch pro chemick\u00e9 procesy, bublinkov\u00fdch uz\u00e1v\u011brech, potravin\u00e1ch a \u010dasto se pou\u017e\u00edv\u00e1 v\u00fdroba barviv.<\/p>","protected":false},"excerpt":{"rendered":"
Alloy20 (N08020) je austenitick\u00e1 superslitina na b\u00e1zi nikl-\u017eelezo-chrom s vynikaj\u00edc\u00ed odolnost\u00ed proti celkov\u00e9, mezikrystalov\u00e9, d\u016flkov\u00e9 a \u0161t\u011brbinov\u00e9 korozi v chemik\u00e1li\u00edch obsahuj\u00edc\u00edch chloridy, kyselinu s\u00edrovou, kyselinu fosfore\u010dnou a kyselinu dusi\u010dnou. Jeho odolnost proti korozi je dobr\u00e1 mezi 316L a Hastelloy a nen\u00ed tak dobr\u00e1 jako nerezov\u00e1 ocel 316L v n\u011bkter\u00fdch aminov\u00fdch roztoc\u00edch, proto\u017ee je snadn\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-2200","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2200","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=2200"}],"version-history":[{"count":2,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2200\/revisions"}],"predecessor-version":[{"id":2203,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/posts\/2200\/revisions\/2203"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/media?parent=2200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/categories?post=2200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/cs\/wp-json\/wp\/v2\/tags?post=2200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}