{"id":545,"date":"2019-01-31T15:37:38","date_gmt":"2019-01-31T12:37:38","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=545"},"modified":"2020-11-02T11:43:35","modified_gmt":"2020-11-02T08:43:35","slug":"vysokouglerodistaya-stal","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/it\/acciaio-ad-alto-tenore-di-carbonio\/","title":{"rendered":"Acciaio ad alto tenore di carbonio"},"content":{"rendered":"<p><strong>Acciaio ad alto tenore di carbonio - <\/strong>Si tratta di un acciaio che contiene una quantit\u00e0 maggiore di carbonio, da 0,6% a 2%. Durante il processo produttivo, per conferire determinate propriet\u00e0 meccaniche <strong>acciaio ad alto tenore di carbonio <\/strong>\u00a0viene sottoposto a trattamento termico. Questo pu\u00f2 causare piccole crepe nelle saldature dove la lega \u00e8 stata esposta ad alte temperature, il che a sua volta interferisce con la corretta saldatura dell&#039;acciaio.<\/p>\n<p>Per prevenire questo fenomeno e aumentare la produttivit\u00e0 della saldatura, nonch\u00e9 per eliminare la comparsa di zone indurite, si utilizza il preriscaldamento del pezzo a 200-250.<sup>0<\/sup>C. Dopodich\u00e9 la lega si salda perfettamente e crea connessioni affidabili. <strong>Acciaio ad alto tenore di carbonio \u00a0<\/strong>nella maggior parte dei casi non viene utilizzato per le strutture.<\/p>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<h2><strong>Acciaio ad alto tenore di carbonio e suoi gradi<\/strong><\/h2>\n<p><strong>Grado di acciaio ad alto tenore di carbonio \u00a0<\/strong>\u00c8 indicato dalla lettera U (acciaio per utensili al carbonio), seguita da un numero che indica la percentuale di carbonio. Ad esempio, U7 contiene 0,65-0,741 TP3T di carbonio, U13 ha un contenuto di carbonio di 1,25-1,351 TP3T. Le propriet\u00e0 speciali dell&#039;acciaio per utensili sono influenzate dalla presenza di manganese; la lettera G seguir\u00e0 il numero. Ad esempio, lamiera 65G. <strong>Grado di acciaio ad alto tenore di carbonio \u00a0<\/strong>Da U7 a U13, il contenuto di silicio \u00e8 compreso tra 0,15 e 0,351 TP3T, quello di zolfo \u00e8 0,0301 TP3T. I gradi U10A e U12A vengono utilizzati per la produzione di matrici, ma richiedono un successivo indurimento. U8 e U10 vengono utilizzati per realizzare magneti di piccole dimensioni e a bassa potenza.<\/p>\n<p><strong>Gradi di acciaio ad alto tenore di carbonio \u00a0<\/strong>Gli acciai di qualit\u00e0 55, 60 e 70 sono caratterizzati da un&#039;ottima durezza e resistenza, che li rendono adatti alla produzione di cavi, barre, alberi di laminazione e altri componenti soggetti a carichi elevati durante il funzionamento. Gli acciai strutturali al carbonio di alta qualit\u00e0 di qualit\u00e0 15, 35, 45 e 50 vengono utilizzati per componenti sottoposti a successiva cementazione per aumentare la durezza e la resistenza all&#039;usura di componenti come alberi, ingranaggi, assi, dadi, bulloni, giunti e varie parti sensibili all&#039;attrito. L&#039;acciaio di alta qualit\u00e0 \u00e8 anche indicato dalla lettera A dopo le lettere e i numeri, e gli acciai di alta qualit\u00e0 sono designati con la sigla \u0428. I gradi \u0428\u04254, \u0428\u042515 e \u0428\u042515\u0421\u0413, che contengono cromo come additivo di lega, vengono utilizzati per i cuscinetti.<\/p>\n\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t\n<h3><strong>Propriet\u00e0 dell&#039;acciaio ad alto tenore di carbonio<\/strong><\/h3>\n<p><strong>Propriet\u00e0 dell&#039;acciaio ad alto tenore di carbonio \u00a0<\/strong>All&#039;aumentare del carbonio, la cementite aumenta, mentre la ferrite diminuisce. Ci\u00f2 fa s\u00ec che il metallo acquisisca una struttura meno duttile e meno tenacia, pur mantenendo resistenza e durezza. <strong>propriet\u00e0 dell&#039;acciaio ad alto tenore di carbonio \u00a0<\/strong>La qualit\u00e0 dell&#039;acciaio dipende in larga misura dal contenuto di impurit\u00e0 nocive: minore \u00e8 il contenuto, migliore \u00e8 la qualit\u00e0. La presenza di manganese aumenta la temprabilit\u00e0 dell&#039;acciaio e ne aumenta significativamente la resistenza. Il manganese contrasta anche gli effetti nocivi dello zolfo, che, se presente in grandi quantit\u00e0, provoca la formazione di cricche durante la forgiatura. <strong>Propriet\u00e0 dell&#039;acciaio ad alto tenore di carbonio \u00a0<\/strong>Appartengono a una classe di acciai difficili da saldare, quindi non vengono utilizzati nelle strutture saldate e la saldatura viene utilizzata solo per lavori di riparazione o rivestimento. Pertanto, <strong>propriet\u00e0 dell&#039;acciaio ad alto tenore di carbonio <\/strong>consentono di utilizzarlo per la produzione di utensili ad alta resistenza, strumenti di misura e tutto quanto sopra elencato.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-546 aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0412\u044b\u0441\u043e\u043a\u043e\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c.webp\" alt=\"\" width=\"702\" height=\"417\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0412\u044b\u0441\u043e\u043a\u043e\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c.webp 702w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0412\u044b\u0441\u043e\u043a\u043e\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c-300x178.webp 300w, 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