{"id":4987,"date":"2020-09-24T06:16:58","date_gmt":"2020-09-24T06:16:58","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4987"},"modified":"2020-09-24T06:16:58","modified_gmt":"2020-09-24T06:16:58","slug":"airway-streaks","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/airway-streaks\/","title":{"rendered":"Rayas en las v\u00edas respiratorias"},"content":{"rendered":"<p>Las vetas en el canal de colada se deben principalmente a un contenido excesivo de hidr\u00f3geno en el metal fundido y a la obstrucci\u00f3n de la cavidad de la boquilla por objetos extra\u00f1os. La boquilla de colada est\u00e1 relativamente h\u00fameda, el metal fundido permanece demasiado tiempo en el horno de fusi\u00f3n o en el horno de reposo, o la temperatura del aluminio l\u00edquido es demasiado alta, lo que provoca un aumento del contenido de hidr\u00f3geno. Durante el proceso de laminaci\u00f3n, el gas presente en la cavidad l\u00edquida destinada a la laminaci\u00f3n no se dispersa f\u00e1cilmente en la banda s\u00f3lida; la palanquilla permanece siempre suspendida en la cavidad l\u00edquida. Con el tiempo, el gas acumulado formar\u00e1 cada vez m\u00e1s burbujas peque\u00f1as. All\u00ed donde hay burbujas, el flujo del metal fundido se ve obstaculizado y se ve afectado el suministro continuo del mismo, por lo que aparece una raya blanca en la superficie de la banda.<\/p>\n<p>Adem\u00e1s, si quedan impurezas met\u00e1licas o no met\u00e1licas en la cavidad de la boquilla durante el proceso de fabricaci\u00f3n de la placa vertical, se producir\u00e1 un bloqueo parcial y se crear\u00e1 una zona de baja presi\u00f3n. El gas (principalmente hidr\u00f3geno) se concentrar\u00e1 en este punto y se convertir\u00e1 gradualmente en un cono de gas, lo que obstaculizar\u00e1 el flujo normal del aluminio fundido. En ese momento, se debe aumentar la velocidad de la banda y elevar adecuadamente la temperatura de la caja delantera y el nivel de l\u00edquido. Bajo la acci\u00f3n de la presi\u00f3n est\u00e1tica, se formar\u00e1n poros largos a ambos lados de las bandas y se desplazar\u00e1n. Cuando los dos \u201ccanales de aire\u201d se acercan entre s\u00ed, parece producirse una atracci\u00f3n entre ambos que hace que se acerquen gradualmente hasta fusionarse en uno solo, formando un tri\u00e1ngulo de aire en la confluencia y dejando al descubierto un orificio en la superficie; o bien, se puede pegar cinta de papel y chapa de acero en la posici\u00f3n correspondiente de la banda sobre el rodillo y, a continuaci\u00f3n, hacer girar el rodillo. En la zona bif\u00e1sica, se rompe la capa dura superficial que forma el cono de gas, se libera el gas y las franjas de las v\u00edas de aire desaparecen gradualmente.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5026\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/09\/Airway-Streaks.jpg\" alt=\"Rayas en las v\u00edas respiratorias\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Airway-Streaks.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Airway-Streaks-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Medidas terap\u00e9uticas para las estr\u00edas de las v\u00edas respiratorias<\/strong><\/p>\n<p>(1) El material laminado para canalones puede instalarse y utilizarse una vez que se haya secado por completo, lo que reduce el tiempo de preparaci\u00f3n del panel vertical para evitar la absorci\u00f3n de humedad.<\/p>\n<p>(2) Reducir el tiempo de permanencia del metal fundido en el horno de fundici\u00f3n y en el horno de reposo; si este tiempo supera las 4 horas, deber\u00e1 realizarse un nuevo refinado. Cuando la temperatura es excesiva o el aluminio fundido permanece m\u00e1s de 8 horas, se modifica y se vuelve a rociar para su refinado, con el fin de reducir el contenido de hidr\u00f3geno del metal fundido.<\/p>\n<p>(3) Coge <a href=\"http:\/\/www.alalloycasting.com\/es\/ceramic-foam-filter\/\">filtro de espuma cer\u00e1mica<\/a> medidas de filtrado para eliminar las part\u00edculas s\u00f3lidas en suspensi\u00f3n presentes en la masa fundida.<\/p>\n<p>(4) Limpia la caja frontal y la base, el tubo de alimentaci\u00f3n y <a href=\"http:\/\/www.alalloycasting.com\/es\/casting-launder-2\/\">sistema de canalizaci\u00f3n de transferencia de metal<\/a> una vez que la m\u00e1quina se haya detenido, para evitar que se introduzcan impurezas met\u00e1licas y no met\u00e1licas en el <a href=\"http:\/\/www.alalloycasting.com\/es\/casting-nozzles\/\">boquilla de fundici\u00f3n<\/a> cuando se levante la losa.<\/p>\n<p>(5) Garantizar la pureza, la presi\u00f3n y el caudal del gas refinado para evitar que se vea afectada la calidad de la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"<p>Airway streaks are mainly caused by too high melt hydrogen content and blocking of foreign objects in the nozzle cavity. The casting nozzle is relatively&hellip;<\/p>","protected":false},"author":1,"featured_media":5028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-4987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Airway Streaks Treatment by Degassing and Filtering<\/title>\n<meta name=\"description\" content=\"Airway streaks are mainly caused by too high melt hydrogen content and blocking of foreign objects in the nozzle cavity. 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