{"id":280,"date":"2024-08-05T12:22:12","date_gmt":"2024-08-05T04:22:12","guid":{"rendered":"http:\/\/www.1.com\/?p=274"},"modified":"2024-10-10T13:16:29","modified_gmt":"2024-10-10T05:16:29","slug":"about-detail-67","status":"publish","type":"post","link":"https:\/\/www.hexinmusu.com\/pt\/about-detail-67.html","title":{"rendered":"Processo de fundi\u00e7\u00e3o a baixa press\u00e3o"},"content":{"rendered":"<figure class='wp-block-image size-full'><img src='https:\/\/www.hexinmusu.com\/wp-content\/uploads\/2024\/08\/wz-67.webp' alt='' class='wp-image-470' \/><\/figure>\n\n\n\n<p>\u4f4e\u538b\u94f8\u9020\u662f\u5728\u538b\u529b\u4f5c\u7528\u4e0b\u586b\u5145\u6db2\u4f53\u91d1\u5c5e\u5f62\u6210\u94f8\u4ef6\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u5b83\u88ab\u79f0\u4e3a\u4f4e\u538b\u538b\u94f8\uff0c\u56e0\u4e3a\u5b83\u4f7f\u7528\u7684\u538b\u529b\u5f88\u4f4e\u3002\u5de5\u827a\u6d41\u7a0b\uff08\u89c1\u56fe1\uff09\u4e3a\uff1a\u5728\u5bc6\u5c01\u5769\u57da\uff08\u6216\u5bc6\u5c01\u94bb\uff09\u4e2d\uff0c\u8fdb\u5165\u5e72\u538b\u7f29\u7a7a\u6c14\uff0c\u91d1\u5c5e\u6db22\u5728\u6c14\u4f53\u538b\u529b\u4e0b\uff0c\u6cbf\u5347\u7ba14\u4e0a\u5347\uff0c\u901a\u8fc7\u6d47\u53e35\u5e73\u7a33\u8fdb\u5165\u81548\uff0c\u4fdd\u6301\u5769\u57da\u5a31\u4e50\u6db2\u538b\uff0c\u76f4\u81f3\u94f8\u4ef6\u5b8c\u5168\u51dd\u56fa\uff0c\u7136\u540e\u7f13\u89e3\u6db2\u538b\uff0c\u4f7f\u5f00\u53e3\u7ba1\u672a\u51dd\u56fa\u91d1\u5c5e\u6db2\u6d41\u5769\u57da\u574d\u584c\uff0c\u7136\u540e\u901a\u8fc7\u7f3812\u5f00\u542f\u94f8\u4ef6\u3002<br>As especifica\u00e7\u00f5es do processo para a fundi\u00e7\u00e3o a baixa press\u00e3o incluem o carregamento, a pressuriza\u00e7\u00e3o, a temperatura de pr\u00e9-aquecimento, a temperatura de inje\u00e7\u00e3o, o revestimento da fundi\u00e7\u00e3o, etc.<\/p>\n\n\n\n<h2 class='wp-block-heading'>(1) Carregamento e pressuriza\u00e7\u00e3o<\/h2>\n\n\n\n<p>A press\u00e3o ascendente \u00e9 a press\u00e3o necess\u00e1ria quando o n\u00edvel do l\u00edquido met\u00e1lico sobe para a porta de fluxo. A velocidade de subida do l\u00edquido met\u00e1lico no tubo de subida deve ser t\u00e3o lenta quanto poss\u00edvel, o que favorece a descarga do g\u00e1s na cavidade, e o metal n\u00e3o salpica quando entra na porta de fluxo.<\/p>\n\n\n\n<h2 class='wp-block-heading'>(2) Press\u00e3o de enchimento e velocidade de enchimento<\/h2>\n\n\n\n<p>A press\u00e3o de carga Pa \u00e9 a press\u00e3o necess\u00e1ria para elevar a carga de metal l\u00edquido at\u00e9 ao topo da pe\u00e7a fundida. Durante a fase de enchimento, a taxa de aumento da press\u00e3o em toda a superf\u00edcie do l\u00edquido \u00e9 a velocidade de enchimento<\/p>\n\n\n\n<h2 class='wp-block-heading'>(3) Pressuriza\u00e7\u00e3o e velocidade de pressuriza\u00e7\u00e3o<\/h2>\n\n\n\n<p>Ap\u00f3s a cavidade preenchida com metal l\u00edquido, continuar a aumentar a press\u00e3o, de modo a que a cristaliza\u00e7\u00e3o da pe\u00e7a fundida num determinado tamanho de press\u00e3o de solidifica\u00e7\u00e3o. Nesta altura, a press\u00e3o \u00e9 designada por press\u00e3o de cristaliza\u00e7\u00e3o. Quanto maior for a press\u00e3o de cristaliza\u00e7\u00e3o, melhor ser\u00e1 o efeito de contra\u00e7\u00e3o e mais densa ser\u00e1 a organiza\u00e7\u00e3o final da fundi\u00e7\u00e3o obtida. No entanto, em qualquer caso, n\u00e3o se pode aumentar a press\u00e3o de cristaliza\u00e7\u00e3o para melhorar a qualidade das pe\u00e7as fundidas.<\/p>\n\n\n\n<h2 class='wp-block-heading'>(4) Tempo de espera<\/h2>\n\n\n\n<p>A press\u00e3o da cavidade \u00e9 aumentada at\u00e9 \u00e0 press\u00e3o do produto, mantida \u00e0 press\u00e3o de cristaliza\u00e7\u00e3o durante um certo per\u00edodo de tempo, verificando-se que a pe\u00e7a fundida est\u00e1 completamente solidificada, o tempo necess\u00e1rio \u00e9 designado por tempo de press\u00e3o de reten\u00e7\u00e3o. Se o tempo de press\u00e3o n\u00e3o for suficiente, a pe\u00e7a fundida n\u00e3o est\u00e1 completamente solidificada, o metal l\u00edquido da cavidade volta todo ou parte do fluxo para a doa\u00e7\u00e3o, resultando em pe\u00e7as fundidas \"vazias\": se o tempo de press\u00e3o for demasiado longo, a pe\u00e7a fundida permanece demasiado tempo, n\u00e3o s\u00f3 reduz o rendimento do processo, mas tamb\u00e9m leva \u00e0 \"congela\u00e7\u00e3o\" da boca do fluxo, de modo que a pe\u00e7a fundida \u00e9 dif\u00edcil de formar. As pe\u00e7as fundidas s\u00e3o dif\u00edceis de formar, pelo que a produ\u00e7\u00e3o deve escolher o tempo de press\u00e3o correto.<\/p>\n\n\n\n<h2 class='wp-block-heading'>(5) Temperatura de fundi\u00e7\u00e3o e temperatura de escoamento<\/h2>\n\n\n\n<p>\u4f4e\u538b\u94f8\u9020\u53ef\u91c7\u7528\u5404\u79cd\u94f8\u9020\u7c7b\u578b\uff0c\u975e\u91d1\u5c5e\u5de5\u4f5c\u6e29\u5ea6\u4e00\u822c\u4e3a\u5ba4\u6e29\uff0c\u9996\u5148\u662f\u7279\u6b8a\u8981\u6c42\uff0c\u91d1\u5c5e\u5de5\u4f5c\u6e29\u5ea6\u6709\u4e00\u5b9a\u8981\u6c42\uff0c\u5982\u4f4e\u538b\u94f8\u9020\u94dd\u5408\u91d1\uff0c\u91d1\u5c5e\u5de5\u4f5c\u6e29\u5ea6\u4e00\u822c\u63a7\u5236\u5728200~2500C\uff0c\u6d41\u52a8\u8584\u58c1\u590d\u6742\u90e8\u4ef6\uff0c\u53ef\u8fbe300~3500C\u3002\u5173\u4e8e\u5408\u91d1\u7684\u6d47\u7b51\u6e29\u5ea6\uff0c\u5b9e\u8df5\u8bc1\u660e\uff0c\u5728\u786e\u4fdd\u94f8\u4ef6\u5f62\u6210\u7684\u524d\u63d0\u4e0b\uff0c\u5e94\u5c3d\u53ef\u80fd\u4f4e\u3002<\/p>\n\n\n\n<h2 class='wp-block-heading'>(6) Revestimentos<\/h2>\n\n\n\n<p>Se for utilizada uma fundi\u00e7\u00e3o de baixa press\u00e3o do tipo metal, esta deve ser pintada para melhorar a sua vida \u00fatil e a qualidade da fundi\u00e7\u00e3o; o revestimento deve ser uniforme e a espessura do revestimento deve ser determinada de acordo com o acabamento da superf\u00edcie da fundi\u00e7\u00e3o e a estrutura da fundi\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u4f4e\u538b\u94f8\u9020\u662f\u5728\u538b\u529b\u4f5c\u7528\u4e0b\u586b\u5145\u6db2\u4f53\u91d1\u5c5e\u5f62\u6210\u94f8\u4ef6\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u5b83\u88ab\u79f0\u4e3a\u4f4e\u538b\u538b\u94f8\uff0c\u56e0\u4e3a\u5b83\u4f7f\u7528\u7684\u538b\u529b\u5f88\u4f4e\u3002\u5de5\u827a\u6d41\u7a0b\uff08\u89c1\u56fe1\uff09\u4e3a\uff1a\u5728\u5bc6\u5c01\u5769\u57da\uff08\u6216\u5bc6\u5c01\u94bb\uff09\u4e2d\uff0c\u8fdb\u5165\u5e72\u538b\u7f29\u7a7a\u6c14\uff0c\u91d1\u5c5e\u6db22\u5728\u6c14\u4f53\u538b\u529b\u4e0b\uff0c\u6cbf\u5347\u7ba14\u4e0a\u5347\uff0c\u901a\u8fc7\u6d47\u53e35\u5e73\u7a33\u8fdb\u5165\u81548\uff0c\u4fdd\u6301\u5769\u57da\u5a31\u4e50\u6db2\u538b\uff0c\u76f4\u81f3\u94f8\u4ef6\u5b8c\u5168\u51dd\u56fa\uff0c\u7136\u540e\u7f13\u89e3\u6db2\u538b\uff0c\u4f7f\u5f00\u53e3\u7ba1\u672a\u51dd\u56fa\u91d1\u5c5e\u6db2\u6d41\u5769\u57da\u574d\u584c\uff0c\u7136\u540e\u901a\u8fc7\u7f3812\u5f00\u542f\u94f8\u4ef6\u3002\u4f4e\u538b\u94f8\u9020\u7684\u5de5\u827a\u89c4\u8303\u5305\u62ec\u5145\u7535\u3001\u589e\u538b\u3001\u9884\u70ed\u6e29\u5ea6\u3001\u6ce8\u5c04\u6e29\u5ea6\u3001\u94f8\u9020\u6d82\u5c42\u7b49 (1)\u5145\u578b\u548c\u589e\u538b \u5347\u6db2\u538b\u529b\u662f\u6307\u5f53\u91d1\u5c5e\u6db2\u4f4d\u4e0a\u5347\u5230\u6d41\u53e3\u65f6\u6240\u9700\u7684\u538b\u529b\u3002\u91d1\u5c5e\u6db2\u4f53\u5728\u5347\u6db2\u7ba1\u4e2d\u7684\u4e0a\u5347\u901f\u5ea6\u5e94\u5c3d\u53ef\u80fd\u6162\uff0c\u6709\u5229\u4e8e\u578b &hellip;<\/p>","protected":false},"author":1,"featured_media":470,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[21],"tags":[47,49,89],"class_list":["post-280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-about-news","tag-low-pressure-casting","tag-die-casting","tag-aluminium-alloy"],"_links":{"self":[{"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/posts\/280","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/comments?post=280"}],"version-history":[{"count":0,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/posts\/280\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/media\/470"}],"wp:attachment":[{"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/media?parent=280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/categories?post=280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hexinmusu.com\/pt\/wp-json\/wp\/v2\/tags?post=280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}