{"id":552,"date":"2019-02-01T12:36:16","date_gmt":"2019-02-01T09:36:16","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=552"},"modified":"2020-11-02T11:42:52","modified_gmt":"2020-11-02T08:42:52","slug":"sredneuglerodistaya-stal","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/it\/acciaio-al-carbonio-medio\/","title":{"rendered":"Acciaio a medio tenore di carbonio: gradi, propriet\u00e0 e caratteristiche della lega"},"content":{"rendered":"<p>L&#039;acciaio a medio tenore di carbonio \u00e8 un acciaio che non contiene elementi di lega e presenta un tenore di carbonio compreso tra 0,25 e 0,61 TP\u00b3T e impurit\u00e0 costanti. Questa lega \u00e8 classificata come acciaio di qualit\u00e0 standard, fusa in forni a ossigeno basico ed \u00e8 considerata economica grazie ai suoi costi di produzione relativamente bassi. Le sue propriet\u00e0 meccaniche sono significativamente inferiori rispetto ad altre leghe.<\/p>\n<p>Questo tipo di acciaio \u00e8 anche considerato un acciaio da tempra, il che significa che richiede un trattamento termico aggiuntivo, tra cui tempra e rinvenimento ad alta temperatura. L&#039;acciaio a medio tenore di carbonio pu\u00f2 essere legato, il che conferisce propriet\u00e0 meccaniche uniche. L&#039;aggiunta di manganese aumenta la resistenza dell&#039;acciaio e conferisce elevate propriet\u00e0 elastiche; queste propriet\u00e0 vengono acquisite dopo tempra, rinvenimento e talvolta normalizzazione. L&#039;aggiunta di cromo e nichel aumenta la resistenza, la tenacit\u00e0 e altre propriet\u00e0 di lavorazione. Le leghe di questa classe hanno una temprabilit\u00e0 elevata.<\/p>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>L&#039;acciaio a medio tenore di carbonio e basso legato viene utilizzato nell&#039;ingegneria meccanica dopo trattamento termico, tempra e rinvenimento. Alcuni tipi sono anche rinvenuti e normalizzati. Ci\u00f2 consente la produzione di componenti che operano in condizioni di attrito relativamente elevato, con elevate vibrazioni e carichi statici. L&#039;acciaio strutturale a medio tenore di carbonio viene utilizzato con successo per componenti meccanici, ma richiede ulteriori affinamenti. Viene utilizzato per la produzione di frizioni freno a secco e componenti soggetti a elevati carichi di attrito.<\/p>\n<p>Poich\u00e9 questa lega mantiene a lungo un&#039;elevata durezza e ottime propriet\u00e0 di taglio, viene utilizzata per la produzione di utensili da taglio. Il contenuto di silicio aumenta la resistenza riducendo al contempo la tenacit\u00e0, con conseguente riduzione della temprabilit\u00e0 dei componenti. Questo tipo di lega viene utilizzato per la produzione di molle. La presenza di cromo e manganese nell&#039;acciaio a medio tenore di carbonio aumenta anche la resistenza e l&#039;usura. Il metallo \u00e8 saldabile, il che lo rende adatto alla creazione di strutture o componenti saldati durevoli.<\/p>\n<h2>Gradi di acciaio a medio tenore di carbonio<\/h2>\n<blockquote><p>I gradi di acciaio a medio tenore di carbonio sono regolamentati dalle norme GOST: GOST 1050-75, GOST 380-71.<\/p><\/blockquote>\n\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t\n<p>Secondo gli standard stabiliti, tutte le leghe sono suddivise in gruppi:<\/p>\n<ul>\n<li>A - fornito in base alle propriet\u00e0 meccaniche;<\/li>\n<li>B - per composizione chimica;<\/li>\n<li>B \u2013 in base alle propriet\u00e0 meccaniche, ma tenendo conto dei requisiti individuali per la composizione chimica.<\/li>\n<\/ul>\n<p>I gradi di acciaio a medio tenore di carbonio del gruppo A hanno i seguenti nomi:<\/p>\n<ul>\n<li>Articolo 0;<\/li>\n<li>Articolo 1;<\/li>\n<li>Articolo 2;<\/li>\n<li>Articolo 3;<\/li>\n<li>Articolo 4;<\/li>\n<li>Articolo 5;<\/li>\n<li>Articolo 6;<\/li>\n<li>Articolo 7.<\/li>\n<\/ul>\n<p>Se la lega \u00e8 bollente si indica l&#039;abbreviazione &quot;kp&quot;, semicalmata - &quot;ps&quot;, in assenza di abbreviazione si deve supporre che l&#039;acciaio sia calmato.<\/p>\n<blockquote><p>Gli acciai a medio tenore di carbonio del gruppo B vengono prodotti utilizzando metodi di conversione, Bessemer e a focolare aperto.<\/p><\/blockquote>\n<p>Nella marcatura, il metodo di produzione viene indicato tramite un&#039;abbreviazione in lettere:<\/p>\n<ul>\n<li>&quot;M&quot; - focolare aperto;<\/li>\n<li>&quot;B&quot; Bessemer;<\/li>\n<li>Busta &quot;K&quot;.<\/li>\n<\/ul>\n<p>Per l&#039;acciaio Bessemer del gruppo B, \u00e8 consuetudine produrre solo i seguenti gradi: BSt. O, BSt. 3, BSt. 4, BSt. 5, BSt. 6.<\/p>\n<p>Gli acciai a medio tenore di carbonio del gruppo B sono prodotti utilizzando i processi di conversione e di fusione a focolare aperto. Per gli acciai da fusione a focolare aperto del gruppo B sono accettati i seguenti gradi: VMSt. 2, VMSt. 3, VMSt. 4, VMSt. 5. Per gli acciai da conversione del gruppo B, gli stessi gradi sono designati con la lettera &quot;K&quot; (VKSt. 2, VKSt. 3).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-553 aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/02\/\u0421\u0440\u0435\u0434\u043d\u0435\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c.webp\" alt=\"Acciaio al carbonio medio\" width=\"688\" height=\"417\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/02\/\u0421\u0440\u0435\u0434\u043d\u0435\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c.webp 688w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/02\/\u0421\u0440\u0435\u0434\u043d\u0435\u0443\u0433\u043b\u0435\u0440\u043e\u0434\u0438\u0441\u0442\u0430\u044f-\u0441\u0442\u0430\u043b\u044c-300x182.webp 300w, 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