{"id":6481,"date":"2023-08-24T13:45:19","date_gmt":"2023-08-24T05:45:19","guid":{"rendered":"https:\/\/zltechlaser.com\/?p=6481"},"modified":"2024-01-25T14:49:56","modified_gmt":"2024-01-25T06:49:56","slug":"quest-ce-que-le-soudage-laser-a-penetration-profonde","status":"publish","type":"post","link":"https:\/\/zltechlaser.com\/fr\/blog\/quest-ce-que-le-soudage-laser-a-penetration-profonde\/","title":{"rendered":"Qu&#039;est-ce que le soudage laser \u00e0 p\u00e9n\u00e9tration profonde ?"},"content":{"rendered":"<h2>Introduction :<\/h2>\n<p>Avez-vous entendu parler du soudage laser \u00e0 p\u00e9n\u00e9tration profonde ? Le soudage laser \u00e0 p\u00e9n\u00e9tration profonde est une technique de soudage avanc\u00e9e. Le soudage laser \u00e0 p\u00e9n\u00e9tration profonde (DPLW) utilise un faisceau laser \u00e0 haute \u00e9nergie pour cr\u00e9er des joints de soudure profonds et \u00e9troits dans divers mat\u00e9riaux, g\u00e9n\u00e9ralement des m\u00e9taux. Dans cet article, nous allons d\u00e9couvrir son fonctionnement ainsi que ses avantages et ses inconv\u00e9nients.<\/p>\n<h2>Le principe du soudage laser<\/h2>\n<h2><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3279\" src=\"https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/04\/laser_welding_machine_screen_for_sale-300x225.webp\" alt=\"\" width=\"407\" height=\"305\" srcset=\"https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/04\/laser_welding_machine_screen_for_sale-300x225.webp 300w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/04\/laser_welding_machine_screen_for_sale-768x576.webp 768w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/04\/laser_welding_machine_screen_for_sale-800x600.webp 800w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/04\/laser_welding_machine_screen_for_sale.webp 1000w\" sizes=\"auto, (max-width: 407px) 100vw, 407px\" \/><\/h2>\n<p>Le soudage laser peut \u00eatre r\u00e9alis\u00e9 \u00e0 l&#039;aide de faisceaux laser continus ou puls\u00e9s. Le principe du soudage laser peut \u00eatre divis\u00e9 en soudage par conduction thermique et soudage laser \u00e0 p\u00e9n\u00e9tration profonde.<\/p>\n<ul>\n<li>Lorsque la densit\u00e9 de puissance est inf\u00e9rieure \u00e0 104~105 W\/cm2, il s&#039;agit d&#039;un soudage par conduction thermique. \u00c0 ce stade, la profondeur de p\u00e9n\u00e9tration est faible et la vitesse de soudage est lente ;<\/li>\n<li>Lorsque la densit\u00e9 de puissance est sup\u00e9rieure \u00e0 105~107 W\/cm2, la surface m\u00e9tallique s&#039;enfonce dans des \u00ab cavit\u00e9s \u00bb par chauffage, formant ainsi une soudure \u00e0 p\u00e9n\u00e9tration profonde. Elle pr\u00e9sente les caract\u00e9ristiques d&#039;une vitesse de soudage rapide et d&#039;un grand rapport hauteur\/largeur.<\/li>\n<\/ul>\n<p>Le principe du soudage laser par conduction thermique est le suivant : le rayonnement laser chauffe la surface \u00e0 traiter. La chaleur de surface se diffuse vers l&#039;int\u00e9rieur par conduction thermique. En contr\u00f4lant les param\u00e8tres laser tels que la largeur d&#039;impulsion laser, l&#039;\u00e9nergie, la puissance de cr\u00eate et la fr\u00e9quence de r\u00e9p\u00e9tition, la pi\u00e8ce est fondue pour former un bain de fusion sp\u00e9cifique. La machine de soudage laser utilis\u00e9e pour le soudage des engrenages et des plaques minces m\u00e9tallurgiques implique principalement le soudage laser \u00e0 p\u00e9n\u00e9tration profonde.<\/p>\n<p>Ce qui suit se concentre sur le principe du soudage laser \u00e0 p\u00e9n\u00e9tration profonde.<\/p>\n<h2>Le principe du soudage laser \u00e0 p\u00e9n\u00e9tration profonde<\/h2>\n<p>Le soudage laser \u00e0 p\u00e9n\u00e9tration profonde utilise g\u00e9n\u00e9ralement des faisceaux laser continus pour compl\u00e9ter la connexion des mat\u00e9riaux. Son processus physique m\u00e9tallurgique est tr\u00e8s similaire au soudage par faisceau d&#039;\u00e9lectrons. Le m\u00e9canisme de conversion d&#039;\u00e9nergie est r\u00e9alis\u00e9 gr\u00e2ce \u00e0 la structure en \u00ab trou de serrure \u00bb. Sous une irradiation laser \u00e0 densit\u00e9 de puissance suffisamment \u00e9lev\u00e9e, le mat\u00e9riau s&#039;\u00e9vapore et forme de petits pores. Ce petit trou rempli de vapeur est comme un corps noir, absorbant presque toute l&#039;\u00e9nergie du faisceau incident. La temp\u00e9rature d&#039;\u00e9quilibre dans la cavit\u00e9 atteint environ 2500\u2103. La chaleur est transmise depuis la paroi ext\u00e9rieure de la cavit\u00e9 \u00e0 haute temp\u00e9rature pour faire fondre le m\u00e9tal entourant la cavit\u00e9.<\/p>\n<p>Le petit trou est rempli de vapeur \u00e0 haute temp\u00e9rature g\u00e9n\u00e9r\u00e9e par l&#039;\u00e9vaporation continue du mat\u00e9riau des parois sous l&#039;irradiation du faisceau. Les parois du petit trou sont entour\u00e9es de m\u00e9tal en fusion. Le m\u00e9tal liquide est entour\u00e9 de mat\u00e9riaux solides (alors que dans la plupart des proc\u00e9d\u00e9s de soudage conventionnels et de soudage par conduction laser, l&#039;\u00e9nergie est d&#039;abord d\u00e9pos\u00e9e sur la surface de la pi\u00e8ce puis transport\u00e9e vers l&#039;int\u00e9rieur par transmission).<\/p>\n<p>L&#039;\u00e9coulement du liquide \u00e0 l&#039;ext\u00e9rieur de la paroi du pore et la tension superficielle de la couche de paroi maintiennent un \u00e9quilibre dynamique avec la pression de vapeur g\u00e9n\u00e9r\u00e9e en continu dans la cavit\u00e9 du pore. Le faisceau p\u00e9n\u00e8tre en continu dans le petit trou et le mat\u00e9riau s&#039;\u00e9coule du petit trou. Lorsque le faisceau se d\u00e9place, le petit trou est toujours dans un \u00e9tat d&#039;\u00e9coulement stable. C&#039;est-\u00e0-dire que le petit trou et le m\u00e9tal en fusion qui l&#039;entoure se d\u00e9placent vers l&#039;avant avec la vitesse d&#039;avancement du faisceau principal, et le m\u00e9tal en fusion remplit l&#039;espace laiss\u00e9 par le petit trou et se condense en cons\u00e9quence de sorte que la soudure se forme.<\/p>\n<h2>Caract\u00e9ristiques du soudage laser \u00e0 p\u00e9n\u00e9tration profonde<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6495\" src=\"https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/08\/fiber_laser_welding_machine-2-300x225.webp\" alt=\"\" width=\"407\" height=\"305\" srcset=\"https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/08\/fiber_laser_welding_machine-2-300x225.webp 300w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/08\/fiber_laser_welding_machine-2-768x576.webp 768w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/08\/fiber_laser_welding_machine-2-800x600.webp 800w, https:\/\/zltechlaser.com\/wp-content\/uploads\/2023\/08\/fiber_laser_welding_machine-2.webp 1000w\" sizes=\"auto, (max-width: 407px) 100vw, 407px\" \/><\/p>\n<h3>1) Rapport hauteur\/largeur \u00e9lev\u00e9<\/h3>\n<p>\u00c0 mesure que le m\u00e9tal en fusion se forme autour de la cavit\u00e9 cylindrique de vapeur chaude et s\u2019\u00e9tend vers la pi\u00e8ce, la soudure devient profonde et \u00e9troite.<\/p>\n<h3>2) Apport de chaleur minimal<\/h3>\n<p>\u00c9tant donn\u00e9 que la temp\u00e9rature dans le petit trou est tr\u00e8s \u00e9lev\u00e9e, le processus de fusion se produit extr\u00eamement rapidement, l&#039;apport de chaleur dans la pi\u00e8ce est tr\u00e8s faible et la d\u00e9formation thermique et la zone affect\u00e9e par la chaleur sont faibles.<\/p>\n<h3>3) Haute densit\u00e9<\/h3>\n<p>\u00c9tant donn\u00e9 que les petits pores remplis de vapeur \u00e0 haute temp\u00e9rature favorisent l&#039;agitation du bain de soudure et la fuite de gaz, il en r\u00e9sulte une soudure p\u00e9n\u00e9trante sans pores. La vitesse de refroidissement \u00e9lev\u00e9e apr\u00e8s le soudage peut facilement rendre la structure de la soudure plus fine.<\/p>\n<h3>4) Soudures solides<\/h3>\n<p>Gr\u00e2ce \u00e0 la source de chaleur br\u00fblante et \u00e0 l&#039;absorption suffisante des composants non m\u00e9talliques, la teneur en impuret\u00e9s est r\u00e9duite et la taille et la r\u00e9partition des inclusions dans le bain de fusion sont modifi\u00e9es. Le processus de soudage ne n\u00e9cessite pas d&#039;\u00e9lectrodes ni de fils d&#039;apport et la zone de fusion est moins pollu\u00e9e, de sorte que la r\u00e9sistance et la t\u00e9nacit\u00e9 de la soudure sont au moins \u00e9gales, voire sup\u00e9rieures \u00e0 celles du m\u00e9tal de base.<\/p>\n<h3>5) Contr\u00f4le pr\u00e9cis<\/h3>\n<p>Gr\u00e2ce \u00e0 la petite taille du spot lumineux focalis\u00e9, le cordon de soudure peut \u00eatre positionn\u00e9 avec une grande pr\u00e9cision. La sortie laser n&#039;a pas d&#039;\u00ab inertie \u00bb, elle peut \u00eatre arr\u00eat\u00e9e et red\u00e9marr\u00e9e \u00e0 grande vitesse. La pi\u00e8ce complexe peut \u00eatre soud\u00e9e gr\u00e2ce \u00e0 la technologie de d\u00e9placement du faisceau \u00e0 commande num\u00e9rique.<\/p>\n<h3>6) Proc\u00e9d\u00e9 de soudage atmosph\u00e9rique sans contact<\/h3>\n<p>L&#039;\u00e9nergie provient du faisceau de photons, il n&#039;y a aucun contact physique avec la pi\u00e8ce. Aucune force externe n&#039;est donc appliqu\u00e9e \u00e0 la pi\u00e8ce. De plus, le magn\u00e9tisme et l&#039;air n&#039;affectent pas la lumi\u00e8re laser.<\/p>\n<h2>Avantages et inconv\u00e9nients du soudage laser \u00e0 p\u00e9n\u00e9tration profonde<\/h2>\n<h3>Avantages<\/h3>\n<p>1) Le laser focalis\u00e9 a une densit\u00e9 de puissance bien sup\u00e9rieure \u00e0 celle des m\u00e9thodes conventionnelles. La vitesse de soudage est donc rapide, la zone affect\u00e9e par la chaleur et la d\u00e9formation sont faibles. Les mat\u00e9riaux difficiles \u00e0 souder tels que le titane peuvent \u00e9galement \u00eatre soud\u00e9s.<br \/>\n2) Le faisceau lumineux est facile \u00e0 transmettre et \u00e0 contr\u00f4ler, il n&#039;est pas n\u00e9cessaire de remplacer fr\u00e9quemment la torche et la buse. Aucun vide n&#039;est requis pour le soudage par faisceau d&#039;\u00e9lectrons. Cela r\u00e9duit consid\u00e9rablement le temps d&#039;arr\u00eat auxiliaire. Le facteur de charge et l&#039;efficacit\u00e9 de la production sont donc \u00e9lev\u00e9s.<br \/>\n3) La r\u00e9sistance de la soudure, la t\u00e9nacit\u00e9 et les performances globales sont \u00e9lev\u00e9es en raison de l&#039;effet de purification et du taux de refroidissement \u00e9lev\u00e9.<br \/>\n4) En raison du faible apport de chaleur moyen et de la pr\u00e9cision d&#039;usinage \u00e9lev\u00e9e, le co\u00fbt du retraitement peut \u00eatre r\u00e9duit ; en outre, le co\u00fbt de fonctionnement du soudage laser est \u00e9galement faible, ce qui peut r\u00e9duire le co\u00fbt de traitement des pi\u00e8ces.<br \/>\n5) Il peut contr\u00f4ler efficacement l&#039;intensit\u00e9 du faisceau et le positionnement fin, ce qui facilite la r\u00e9alisation d&#039;un fonctionnement automatique.<\/p>\n<h3>Inconv\u00e9nients<\/h3>\n<p>1) La profondeur de soudage est limit\u00e9e.<br \/>\n2) Les exigences d\u2019assemblage de la pi\u00e8ce sont \u00e9lev\u00e9es.<br \/>\n3) L\u2019investissement unique dans le syst\u00e8me laser est relativement \u00e9lev\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction : Avez-vous entendu parler du soudage laser \u00e0 p\u00e9n\u00e9tration profonde ? Le soudage laser \u00e0 p\u00e9n\u00e9tration profonde est une technique de soudage avanc\u00e9e. Le soudage laser \u00e0 p\u00e9n\u00e9tration profonde (DPLW) utilise un faisceau laser \u00e0 haute \u00e9nergie pour cr\u00e9er des joints de soudure profonds et \u00e9troits dans divers mat\u00e9riaux, g\u00e9n\u00e9ralement des m\u00e9taux. Dans cet article, nous allons d\u00e9couvrir son fonctionnement et ses avantages et inconv\u00e9nients\u2026.<\/p>","protected":false},"author":5,"featured_media":6545,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,57],"tags":[],"class_list":["post-6481","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-laser-welding-machine-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is Deep Penetration Laser Welding?<\/title>\n<meta name=\"description\" content=\"The laser welding can be divided into heat conduction welding and laser deep penetration welding. 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