{"id":948,"date":"2019-09-19T11:15:45","date_gmt":"2019-09-19T08:15:45","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=948"},"modified":"2020-11-02T09:52:08","modified_gmt":"2020-11-02T06:52:08","slug":"elektroshlakovaya-svarka-metalla","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/it\/saldatura-ad-arco-elettrico-dei-metalli-2\/","title":{"rendered":"Saldatura elettroscoria dei metalli"},"content":{"rendered":"<p>La saldatura elettroscoria \u00e8 ideale per la saldatura di pezzi spessi, da 15 mm a 600 mm e oltre. Questa tecnologia di saldatura prevede il riscaldamento della zona di fusione con il calore proveniente da un bagno di scoria riscaldato da una corrente elettrica. La scoria offre un&#039;eccellente protezione della zona di solidificazione dall&#039;ossidazione e dall&#039;idrogeno, che hanno un impatto negativo. L&#039;idrogeno presente nel metallo pu\u00f2 causare cricche, quindi la protezione \u00e8 essenziale durante la fusione del metallo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-949 aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u043e\u0448\u043b\u0430\u043a\u043e\u0432\u0430\u044f-\u0441\u0432\u0430\u0440\u043a\u0430-\u043c\u0435\u0442\u0430\u043b\u043b\u0430-\u0441\u0445\u0435\u043c\u0430.webp\" alt=\"Schema di saldatura elettroscoria del metallo\" width=\"221\" height=\"228\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u043e\u0448\u043b\u0430\u043a\u043e\u0432\u0430\u044f-\u0441\u0432\u0430\u0440\u043a\u0430-\u043c\u0435\u0442\u0430\u043b\u043b\u0430-\u0441\u0445\u0435\u043c\u0430.webp 221w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u043e\u0448\u043b\u0430\u043a\u043e\u0432\u0430\u044f-\u0441\u0432\u0430\u0440\u043a\u0430-\u043c\u0435\u0442\u0430\u043b\u043b\u0430-\u0441\u0445\u0435\u043c\u0430-184x190.webp 184w\" sizes=\"auto, (max-width: 221px) 100vw, 221px\" \/><\/p>\n<p>Il processo di saldatura elettroscoria \u00e8 unico in quanto non richiede un arco di saldatura. Utilizza il calore generato dal passaggio della corrente di saldatura attraverso la scoria fusa, che la conduce. Innanzitutto, le due parti da saldare vengono collegate con morsetti speciali. Un elettrodo viene inserito nel giunto tra le parti. L&#039;elettrodo, energizzato a 400 A, viene immerso nel bagno di scoria, riscaldando intensamente la scoria fino a quando la sua temperatura supera il punto di fusione del metallo. Questo provoca la fusione dei bordi metallici, lasciando una saldatura resistente. In questo modo, la scoria funge da saldatura.<\/p>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>La saldatura viene eseguita verticalmente dal basso verso l&#039;alto. Man mano che la saldatura si solidifica, l&#039;unit\u00e0 di saldatura si muove verso l&#039;alto, lasciando un cordone di saldatura. Viene selezionata la velocit\u00e0 di avanzamento ottimale dell&#039;elettrodo, mantenendo costante la distanza tra la punta dell&#039;elettrodo e la superficie del bagno di saldatura. Questo metodo di saldatura consente di saldare metalli di spessore illimitato. Il flusso viene aggiunto gradualmente man mano che la saldatura procede. I cursori del cristallizzatore di rame si muovono con l&#039;unit\u00e0 di saldatura, raffreddati ad acqua. L&#039;unit\u00e0 si muove a una velocit\u00e0 di 1-1,2 m\/ora.<\/p>\n<h2>Vantaggi e alcune caratteristiche della saldatura elettroscoria<\/h2>\n<p>La saldatura elettroscoria produce un cordone di saldatura molto resistente, in grado di sopportare carichi elevati. Questa resistenza \u00e8 dovuta allo spostamento dell&#039;idrogeno nel bagno di fusione, che ne compromette la resistenza. Le propriet\u00e0 meccaniche sono eccellenti. Quando la fonte di calore viene rimossa, il raffreddamento e la solidificazione avvengono alla base della saldatura, a partire dai grani parzialmente fusi del metallo base e procedendo verso la saldatura lungo la linea di fusione.<\/p>\n\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t\n<p>Durante il processo di saldatura, la zona interessata dalla saldatura (ZTA) subisce lievi modifiche strutturali e, di conseguenza, delle propriet\u00e0 del metallo. Ci\u00f2 non comporta alcuna deformazione strutturale del prodotto.<\/p>\n<p>La saldatura elettroscoria dei metalli presenta i seguenti vantaggi:<\/p>\n<ul>\n<li>lo spessore dei prodotti da saldare \u00e8 molto grande;<\/li>\n<li>\u00c8 possibile saldare diversi metalli: ghisa, acciaio, rame, titanio, alluminio e le loro leghe;<\/li>\n<li>saldatura in una sola passata;<\/li>\n<li>non \u00e8 necessario rimuovere le scorie;<\/li>\n<li>non \u00e8 necessario preparare il pezzo (smussare i bordi);<\/li>\n<li>possono essere utilizzati uno o pi\u00f9 elettrodi a filo;<\/li>\n<li>ottenendo una saldatura di alta qualit\u00e0 con eccellenti propriet\u00e0 meccaniche.<\/li>\n<\/ul>\n<p>Svantaggi della saldatura elettroscoria dei metalli:<\/p>\n<ul>\n<li>pu\u00f2 cucinare solo verticalmente;<\/li>\n<li>Dopo la saldatura di alcuni metalli, le propriet\u00e0 meccaniche nella zona termicamente alterata cambiano, indebolendo il metallo, rendendo necessario un ulteriore trattamento termico.<\/li>\n<\/ul>\n<p>Pertanto, la saldatura elettroscoria \u00e8 un metodo idoneo per ottenere il risultato desiderato.<\/p>","protected":false},"excerpt":{"rendered":"<p>La saldatura elettroscoria \u00e8 ideale per saldare pezzi spessi da 15 mm a\u2026<\/p>","protected":false},"author":1,"featured_media":950,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-948","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-svarka-metallov"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u0441\u0442\u0430\u0442\u044c\u0435 \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f 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