{"id":12896,"date":"2025-10-27T18:54:47","date_gmt":"2025-10-27T18:54:47","guid":{"rendered":"https:\/\/ipsenglobal.com\/?post_type=knowledge-center&#038;p=12896"},"modified":"2026-03-11T17:14:37","modified_gmt":"2026-03-11T17:14:37","slug":"ask-the-expert-vacuum-furnace-brazing-tips","status":"publish","type":"knowledge-center","link":"https:\/\/ipsenglobal.com\/fr\/knowledge-center\/ask-the-expert-vacuum-furnace-brazing-tips\/","title":{"rendered":"Demandez \u00e0 l'expert : Conseils pour le brasage des fours \u00e0 vide"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Par Jim Grann, directeur technique<\/h4>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h5 class=\"wp-block-heading\">Q : Lorsqu'on d\u00e9termine la quantit\u00e9 de mat\u00e9riau de brasage \u00e0 utiliser pour une application, est-il pr\u00e9f\u00e9rable de la surestimer ou de la sous-estimer l\u00e9g\u00e8rement ?<\/h5>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">R : Cela d\u00e9pend. Si vous d\u00e9veloppez votre processus au d\u00e9part, il est pr\u00e9f\u00e9rable de surestimer l\u00e9g\u00e8rement et de r\u00e9duire vos calculs.<\/h5>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Les \u00e9l\u00e9ments les plus importants \u00e0 prendre en compte pour calculer la quantit\u00e9 d'alliage de brasure sont les suivants :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La taille de l'\u00e9cart dans le joint<\/li>\n\n\n\n<li>Le type d'alliage et sa temp\u00e9rature de fusion par rapport au mat\u00e9riau auquel il est li\u00e9.<\/li>\n\n\n\n<li>Si le processus est enti\u00e8rement r\u00e9alis\u00e9 dans un vide faible ou dans une combinaison d'environnements \u00e0 vide faible et \u00e0 pression partielle.<\/li>\n<\/ul>\n\n\n\n<p>Tant que ces variables sont prises en compte, que les calculs sont effectu\u00e9s correctement et que le produit final fait l'objet d'un test de qualit\u00e9, la <a href=\"https:\/\/ipsenglobal.com\/fr\/vacuum-furnaces\/\" type=\"page\" id=\"3431\" target=\"_blank\" rel=\"noreferrer noopener\">four \u00e0 vide<\/a> est con\u00e7u pour aider les op\u00e9rateurs \u00e0 cr\u00e9er des joints bras\u00e9s pr\u00e9visibles et reproductibles en contr\u00f4lant les temp\u00e9ratures et les gaz de traitement pr\u00e9sents dans la chambre tout en maintenant une uniformit\u00e9 de temp\u00e9rature exceptionnelle dans toute la chambre. Cette r\u00e9p\u00e9tabilit\u00e9 vous permet de continuer \u00e0 r\u00e9duire la quantit\u00e9 de mat\u00e9riau de brasage et de tester jusqu'\u00e0 ce que vous trouviez la quantit\u00e9 minimale viable de mat\u00e9riau pour fabriquer des pi\u00e8ces fiables et r\u00e9p\u00e9tables.<\/p>\n\n\n\n<p>En d'autres termes, il est souvent pr\u00e9f\u00e9rable d'en faire moins. L'action capillaire est un processus tr\u00e8s efficace pour aspirer le mat\u00e9riau de brasage dans les joints. Le processus de brasage veut utiliser juste ce qu'il faut pour faire le travail, et pas plus. Ce n'est pas seulement \u00e0 cause du co\u00fbt des d\u00e9chets, mais aussi parce que moins de mat\u00e9riau de brasage signifie moins de probl\u00e8mes de pression de vapeur que le four devra surmonter. En outre, l'utilisation de l'alliage de brasage minimum n\u00e9cessaire r\u00e9duit l'\u00e9coulement et le nettoyage des \u00e9l\u00e9ments chauffants de la zone chaude. Cela augmente la long\u00e9vit\u00e9 de la zone chaude et r\u00e9duit les co\u00fbts de maintenance.<\/p>\n\n\n\n<p>Le brasage peut \u00eatre un processus salissant, laissant derri\u00e8re lui des restes de mat\u00e9riau de brasage en exc\u00e8s qui doivent fr\u00e9quemment \u00eatre br\u00fbl\u00e9s. Les op\u00e9rateurs qui utilisent la quantit\u00e9 minimale viable de mat\u00e9riau de brasage peuvent prolonger les d\u00e9lais entre les br\u00fblages n\u00e9cessaires afin de r\u00e9duire l'accumulation de d\u00e9chets d'alliage dans la zone chaude.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"424347\" data-has-transparency=\"false\" style=\"--dominant-color: #424347;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-1024x576.avif\" alt=\"Ipsen vacuum aluminum brazing furnace (VAB)\" class=\"wp-image-12901 not-transparent\" srcset=\"https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-1024x576.avif 1024w, https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-300x169.avif 300w, https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-768x432.avif 768w, https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-1536x864.avif 1536w, https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-2048x1152.avif 2048w, https:\/\/ipsenglobal.com\/wp-content\/uploads\/2025\/10\/DSC00220-18x10.avif 18w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Le saviez-vous ?<\/h3>\n\n\n\n<p class=\"has-white-color has-blue-background-color has-text-color has-background has-link-color wp-elements-e9226b432b7135a157e3e0cd3c76e4f8\">Lors de l'utilisation d'un nouveau four, d'une nouvelle zone chaude ou d'un nouvel \u00e2tre, il est imp\u00e9ratif de s'assurer que l'\u00e2tre est de niveau sur chaque axe.<br><br>Le brasage est particuli\u00e8rement sensible aux foyers et aux montages qui ne sont pas de niveau. La gravit\u00e9 peut affecter l'\u00e9paisseur d'un joint bras\u00e9 lorsqu'un c\u00f4t\u00e9 de la pi\u00e8ce est plus haut que l'autre.<br><br>Si vous constatez un \u00e9coulement d'un c\u00f4t\u00e9 de votre foyer, ou si vous remarquez une brasure in\u00e9gale d'un c\u00f4t\u00e9 de votre pi\u00e8ce ou de votre charge par rapport \u00e0 l'autre c\u00f4t\u00e9, assurez-vous que votre charge est de niveau. Calez votre sole ou votre four si n\u00e9cessaire et testez votre prochain lot pour voir si vous avez r\u00e9solu le probl\u00e8me.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h5 class=\"wp-block-heading\">Q : Lors du brasage, j'ai remarqu\u00e9 que certaines de mes pi\u00e8ces se d\u00e9pla\u00e7aient sur le support. J'ai des pi\u00e8ces qui subissent des d\u00e9formations, des dilatations et des contraintes inattendues sur les joints. Que puis-je faire pour \u00e9viter cela \u00e0 l'avenir ?<\/h5>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">R : Il se peut que votre fourneau fasse le vide trop rapidement.<\/h5>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Les fours \u00e0 vide peuvent r\u00e9duire tr\u00e8s rapidement l'atmosph\u00e8re \u00e0 l'int\u00e9rieur de la zone chaude. Les pi\u00e8ces \u00e0 l'int\u00e9rieur de la chambre peuvent subir une diff\u00e9rence de pression rapide, avec un flux d'air comparable au vent d'un ouragan de cat\u00e9gorie 3.<\/p>\n\n\n\n<p>Bien qu'il n'existe pas de vide \u201ctrop profond\u201d, la vitesse \u00e0 laquelle ce vide se forme dans le four peut, en fait, \u00eatre trop rapide pour certaines pi\u00e8ces.<\/p>\n\n\n\n<p>Les pi\u00e8ces comportant des vides ferm\u00e9s, les pi\u00e8ces \u00e0 g\u00e9om\u00e9trie complexe ou les petites pi\u00e8ces \u00e0 faible masse peuvent subir des changements atmosph\u00e9riques suffisamment rapides pour se d\u00e9placer, se dilater ou se d\u00e9former si la vitesse de l'\u00e9vacuation initiale du vide est trop rapide. Ce sont ces forces qui peuvent cr\u00e9er des probl\u00e8mes inattendus de coefficient de dilatation.<\/p>\n\n\n\n<p>Ipsen peut aider \u00e0 r\u00e9soudre ces probl\u00e8mes en limitant et en ajustant la vitesse \u00e0 laquelle le vide se forme dans votre four avec une d\u00e9rivation \u00e0 pompe lente. Si vous rencontrez ces probl\u00e8mes, contactez-nous pour discuter de l'installation d'une d\u00e9rivation de rechange en appelant le 1-844-GO-IPSEN ou en envoyant un courriel \u00e0 l'adresse suivante <a href=\"mailto:retrofits@ipsenusa.com\">retrofits@ipsenusa.com<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Pour d'autres conseils utiles, consultez notre&nbsp;<a href=\"https:\/\/ipsenglobal.com\/fr\/category\/ask-the-expert\/\" target=\"_blank\" rel=\"noreferrer noopener\">Page \"Demandez \u00e0 l'expert<\/a>.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Vous avez une question technique concernant le traitement thermique ou le fonctionnement et l'entretien des fours \u00e0 vide ?<\/h5>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n    <section id=\"button-block_8aaa8b0c8f079784f66b24c66ff5ab61\"\n        class=\"button-custom-block d-block d-lg-inline-block mx-auto me-lg-5 mb-4\">\n        <a class=\"btn btn-outline-secondary\" href=\"https:\/\/ipsenglobal.com\/fr\/connect-with-an-expert\/\" target=\"_blank\">\n            Contacter un expert Ipsen        <\/a>\n    <\/section>","protected":false},"excerpt":{"rendered":"<p>Par Jim Grann, directeur technique Q : Lorsque l'on d\u00e9termine la quantit\u00e9 de mat\u00e9riau de brasage \u00e0 utiliser pour une application, est-il pr\u00e9f\u00e9rable de la surestimer ou de la sous-estimer l\u00e9g\u00e8rement ? R : Il<\/p>","protected":false},"author":7,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"_tec_requires_first_save":true,"_searchwp_excluded":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"_tribe_blocks_recurrence_rules":"","_tribe_blocks_recurrence_description":"","_tribe_blocks_recurrence_exclusions":"","_ecp_custom_2":"","footnotes":""},"categories":[112,624],"tags":[],"class_list":["post-12896","knowledge-center","type-knowledge-center","status-publish","hentry","category-ask-the-expert","category-brazing"],"acf":[],"yoast_head":"<!-- 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