{"id":728,"date":"2024-10-22T08:45:00","date_gmt":"2024-10-22T08:45:00","guid":{"rendered":"https:\/\/cnsfdz.com\/%e9%94%b0%e9%93%9c%e5%90%88%e9%87%91%e5%88%86%e6%b5%81%e5%99%a8%e6%9d%90%e6%96%99%e7%89%b9%e6%80%a7%e4%b8%8e%e5%88%b6%e9%80%a0%e5%b7%a5%e8%89%ba%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90\/"},"modified":"2026-02-04T16:11:25","modified_gmt":"2026-02-04T16:11:25","slug":"analyse-approfondie-des-caracteristiques-des-materiaux-du-shunt-en-alliage-manganese-cuivre-et-du-processus-de-fabrication","status":"publish","type":"post","link":"https:\/\/cnsfdz.com\/fr\/analyse-approfondie-des-caracteristiques-des-materiaux-du-shunt-en-alliage-manganese-cuivre-et-du-processus-de-fabrication\/","title":{"rendered":"Analyse approfondie des caract\u00e9ristiques des mat\u00e9riaux du shunt en alliage mangan\u00e8se-cuivre et du processus de fabrication"},"content":{"rendered":"<h2>I. Pourquoi choisir l'alliage mangan\u00e8se-cuivre ?<\/h2>\n<p>Le c\u0153ur du shunt est l'\u00e9l\u00e9ment r\u00e9sistif, et le choix de son mat\u00e9riau d\u00e9termine directement les performances du shunt. Parmi les nombreux alliages de r\u00e9sistance, le manganin est le mat\u00e9riau de choix pour les shunts de pr\u00e9cision en raison de ses excellentes propri\u00e9t\u00e9s \u00e9lectriques. Il est utilis\u00e9 depuis plus de 100 ans.<\/p>\n<p>Les compositions typiques des alliages mangan\u00e8se-cuivre sont les suivantes : cuivre 84%, mangan\u00e8se 12%, nickel 4%. Des coefficients de temp\u00e9rature extr\u00eamement bas et une bonne stabilit\u00e9 \u00e0 long terme peuvent \u00eatre obtenus par un contr\u00f4le pr\u00e9cis du rapport de chaque \u00e9l\u00e9ment et du processus de traitement thermique.<\/p>\n<h2>II. Propri\u00e9t\u00e9s fondamentales des alliages mangan\u00e8se-cuivre<\/h2>\n<h3>2.1 Coefficient de variation de temp\u00e9rature (TCR) extr\u00eamement faible<\/h3>\n<p>Le TCR des alliages mangan\u00e8se-cuivre peut \u00eatre aussi bas que \u00b110ppm\/\u00b0C, les produits de qualit\u00e9 atteignant \u00b15ppm\/\u00b0C ou m\u00eame moins. Cela signifie que lorsque la temp\u00e9rature varie de 50\u00b0C, la r\u00e9sistance ne varie que de 0,05%, ce qui est bien mieux que d'autres alliages tels que le ConocoPrime (\u00b140ppm\/\u00b0C).<\/p>\n<h3>2.2 Faible potentiel thermique<\/h3>\n<p>Le potentiel thermique du MnCu par rapport au Cu est d'environ 1 \u00e0 2 \u03bcV\/\u00b0C, ce qui est beaucoup plus faible que celui du CuCu (environ 40 \u03bcV\/\u00b0C). Il en r\u00e9sulte des erreurs de mesure beaucoup plus faibles dans les environnements \u00e0 gradient de temp\u00e9rature.<\/p>\n<h3>2.3 Bonne stabilit\u00e9 \u00e0 long terme<\/h3>\n<p>Les alliages mangan\u00e8se-cuivre soumis \u00e0 un traitement de vieillissement appropri\u00e9 peuvent avoir un taux de d\u00e9rive annuel inf\u00e9rieur \u00e0 0,005%, ce qui r\u00e9pond aux exigences de stabilit\u00e9 \u00e0 long terme pour les applications de qualit\u00e9 m\u00e9trologique.<\/p>\n<h3>2,4 R\u00e9sistivit\u00e9 mod\u00e9r\u00e9e<\/h3>\n<p>La r\u00e9sistivit\u00e9 de l'alliage mangan\u00e8se-cuivre est d'environ 43~48\u03bc\u03a9-cm. La r\u00e9sistivit\u00e9 mod\u00e9r\u00e9e facilite le traitement des shunts de diff\u00e9rentes sp\u00e9cifications pour r\u00e9pondre aux besoins des applications de petits \u00e0 grands courants.<\/p>\n<h3>2.5 Excellentes propri\u00e9t\u00e9s m\u00e9caniques<\/h3>\n<ul>\n<li>R\u00e9sistance \u00e0 la traction : environ 400~500MPa<\/li>\n<li>Allongement : environ 30~40%<\/li>\n<li>Bonne aptitude au fa\u00e7onnage, facilit\u00e9 \u00e0 r\u00e9aliser des formes vari\u00e9es<\/li>\n<\/ul>\n<h2>III. proc\u00e9d\u00e9 de fusion des alliages mangan\u00e8se-cuivre<\/h2>\n<h3>3.1 S\u00e9lection des mati\u00e8res premi\u00e8res<\/h3>\n<ul>\n<li>Cuivre \u00e9lectrolytique : puret\u00e9 \u226599,95%<\/li>\n<li>Mangan\u00e8se \u00e9lectrolytique : puret\u00e9 \u226599,9%<\/li>\n<li>Nickel \u00e9lectrolytique : puret\u00e9 \u226599,9%<\/li>\n<li>Contr\u00f4le strict des impuret\u00e9s, le fer, le silicium et d'autres impuret\u00e9s affectent le TCR.<\/li>\n<\/ul>\n<h3>3.2 Fusion<\/h3>\n<ul>\n<li>Adopter la fusion par induction sous vide ou la fusion sous protection d'argon<\/li>\n<li>Emp\u00eache l'oxydation et l'introduction d'impuret\u00e9s<\/li>\n<li>Contr\u00f4le pr\u00e9cis de la proportion de chaque \u00e9l\u00e9ment<\/li>\n<li>Bien m\u00e9langer pour assurer l'uniformit\u00e9 des ingr\u00e9dients<\/li>\n<\/ul>\n<h3>3.3 Coul\u00e9e<\/h3>\n<ul>\n<li>Coul\u00e9e continue ou coul\u00e9e en moule<\/li>\n<li>Vitesse de refroidissement contr\u00f4l\u00e9e pour r\u00e9duire la s\u00e9gr\u00e9gation<\/li>\n<li>Les lingots sont soumis \u00e0 un recuit d'homog\u00e9n\u00e9isation<\/li>\n<\/ul>\n<h3>3.4 Processus de moulage<\/h3>\n<ul>\n<li>Lamin\u00e9s \u00e0 chaud\/\u00e0 froid en bandes ou en plaques<\/li>\n<li>\u00c9tirage en fil ou en barre<\/li>\n<li>Traitement en plusieurs \u00e9tapes avec recuit interm\u00e9diaire<\/li>\n<\/ul>\n<h2>Quatri\u00e8mement, le processus de fabrication des shunts<\/h2>\n<h3>4.1 Traitement des \u00e9l\u00e9ments r\u00e9sistifs<\/h3>\n<p>Les alliages mangan\u00e8se-cuivre sont transform\u00e9s en formes appropri\u00e9es selon les sp\u00e9cifications du produit :<\/p>\n<ul>\n<li><strong>Type de bande<\/strong>pour les shunts de faible intensit\u00e9<\/li>\n<li><strong>Type de barre<\/strong>: pour les shunts de moyenne et grande intensit\u00e9<\/li>\n<li><strong>Type de plaque<\/strong>: Convient pour les shunts \u00e0 courant tr\u00e8s \u00e9lev\u00e9<\/li>\n<\/ul>\n<h3>4.2 Mat\u00e9riaux des terminaux<\/h3>\n<p>Les bornes sont g\u00e9n\u00e9ralement en cuivre violet ou en laiton :<\/p>\n<ul>\n<li>Bonne conductivit\u00e9 et faible r\u00e9sistance de contact<\/li>\n<li>Coefficient de dilatation thermique proche de celui du mangan\u00e8se-cuivre<\/li>\n<li>Facilite le soudage et l'installation ult\u00e9rieurs<\/li>\n<\/ul>\n<h3>4.3 Processus de soudage<\/h3>\n<p>Le soudage de l'\u00e9l\u00e9ment r\u00e9sistif aux bornes est un processus critique :<\/p>\n<p><strong>Soudage par faisceau d'\u00e9lectrons (EBW)<\/strong><\/p>\n<ul>\n<li>Des soudures de la plus haute qualit\u00e9<\/li>\n<li>Petite zone affect\u00e9e thermiquement, impact minimal sur les \u00e9l\u00e9ments r\u00e9sistifs<\/li>\n<li>Tr\u00e8s faible r\u00e9sistance de contact<\/li>\n<li>Pour les shunts de pr\u00e9cision haut de gamme<\/li>\n<\/ul>\n<p><strong>brasage<\/strong><\/p>\n<ul>\n<li>Processus mature, \u00e9quipement simple<\/li>\n<li>Convient \u00e0 la production en grande quantit\u00e9<\/li>\n<li>N\u00e9cessit\u00e9 de choisir le bon mat\u00e9riau de brasage<\/li>\n<\/ul>\n<p><strong>rev\u00eatement<\/strong><\/p>\n<ul>\n<li>Convient aux shunts \u00e0 courant \u00e9lev\u00e9<\/li>\n<li>Remplacement facile sur le terrain<\/li>\n<li>La r\u00e9sistance des contacts doit \u00eatre contr\u00f4l\u00e9e<\/li>\n<\/ul>\n<h3>4.4 R\u00e9glage de la r\u00e9sistance<\/h3>\n<p>La r\u00e9sistance du shunt doit \u00eatre ajust\u00e9e avec pr\u00e9cision \u00e0 la valeur nominale :<\/p>\n<ul>\n<li>R\u00e9glage grossier : contr\u00f4l\u00e9 par les dimensions de l'usinage<\/li>\n<li>Mise au point : redimensionnement au laser ou m\u00e9canique<\/li>\n<li>Pr\u00e9cision jusqu'\u00e0 0,01% grade<\/li>\n<\/ul>\n<h3>4.5 Traitement thermique (stabilisation par vieillissement)<\/h3>\n<p>Traitements de stabilisation critiques :<\/p>\n<ul>\n<li>Soulagement des contraintes pour l'usinage<\/li>\n<li>Valeurs de r\u00e9sistance stabilisatrices<\/li>\n<li>Am\u00e9lioration des caract\u00e9ristiques du TCR<\/li>\n<li>Processus typique : 150-200\u00b0C, heures \u00e0 dizaines d'heures<\/li>\n<\/ul>\n<h3>4.6 Traitement de surface<\/h3>\n<ul>\n<li>Bornes \u00e9tam\u00e9es ou nickel\u00e9es pour \u00e9viter l'oxydation<\/li>\n<li>Les \u00e9l\u00e9ments r\u00e9sistifs peuvent \u00eatre recouverts d'une couche protectrice.<\/li>\n<li>Int\u00e9gral peut \u00eatre scell\u00e9<\/li>\n<\/ul>\n<h3>4.7 D\u00e9tection et tri<\/h3>\n<p>Tests rigoureux avant de quitter l'usine :<\/p>\n<ul>\n<li>Mesure de la r\u00e9sistance (pr\u00e9cision de 0,01%)<\/li>\n<li>Mesure du TCR (plusieurs points de temp\u00e9rature)<\/li>\n<li>Mesure du thermopotentiel<\/li>\n<li>Inspection ext\u00e9rieure<\/li>\n<li>S\u00e9lection par degr\u00e9 de pr\u00e9cision<\/li>\n<\/ul>\n<h2>V. Facteurs de processus affectant les performances du shunt<\/h2>\n<h3>5.1 Composition des mat\u00e9riaux<\/h3>\n<p>La teneur en mangan\u00e8se typique de 12% a le TCR le plus bas, et les \u00e9carts par rapport \u00e0 cette valeur augmentent le TCR.<\/p>\n<h3>5.2 D\u00e9formation lors de l'usinage<\/h3>\n<p>L'\u00e9crouissage introduit des contraintes internes qui affectent la stabilit\u00e9 de la r\u00e9sistance et le TCR. Le recuit est n\u00e9cessaire pour \u00e9liminer les contraintes.<\/p>\n<h3>5.3 Proc\u00e9d\u00e9s de traitement thermique<\/h3>\n<p>La temp\u00e9rature et le temps de vieillissement influencent les propri\u00e9t\u00e9s finales. Une temp\u00e9rature trop \u00e9lev\u00e9e peut modifier l'organisation de l'alliage et une temp\u00e9rature trop basse peut ne pas le stabiliser suffisamment.<\/p>\n<h3>5.4 Qualit\u00e9 du soudage<\/h3>\n<p>L'influence thermique de la zone de soudure modifie les propri\u00e9t\u00e9s locales du mat\u00e9riau et les param\u00e8tres de soudage doivent \u00eatre contr\u00f4l\u00e9s pour minimiser la zone d'influence.<\/p>\n<h2>VI. d\u00e9veloppements technologiques avanc\u00e9s<\/h2>\n<h3>6.1 D\u00e9veloppement de nouveaux alliages<\/h3>\n<p>Recherche de nouvelles formulations d'alliages avec un TCR plus faible et une plus grande stabilit\u00e9, comme l'ajout d'oligo-\u00e9l\u00e9ments de terres rares.<\/p>\n<h3>6.2 Shunts \u00e0 couche mince<\/h3>\n<p>Fabrication de shunts miniatures \u00e0 l'aide de techniques de d\u00e9p\u00f4t de couches minces pour les circuits int\u00e9gr\u00e9s et les appareils portables.<\/p>\n<h3>6.3 Structures composites<\/h3>\n<p>Alliage composite mangan\u00e8se-cuivre avec substrat en cuivre pour am\u00e9liorer la dissipation de la chaleur dans les applications \u00e0 courant \u00e9lev\u00e9.<\/p>\n<h3>6.4 Production intelligente<\/h3>\n<p>Introduction de l'inspection automatis\u00e9e et du contr\u00f4le de la qualit\u00e9 par l'IA afin d'am\u00e9liorer l'efficacit\u00e9 et la coh\u00e9rence de la production.<\/p>\n<h2>VII. suggestions d'achat<\/h2>\n<ol>\n<li><strong>Choisir un fabricant r\u00e9gulier<\/strong>Les mat\u00e9riaux et les processus sont des comp\u00e9tences cl\u00e9s<\/li>\n<li><strong>Focus sur les indicateurs techniques<\/strong>TCR, pr\u00e9cision, stabilit\u00e9 \u00e0 long terme<\/li>\n<li><strong>Demandez un rapport d'essai.<\/strong>Confirmation de la performance r\u00e9elle<\/li>\n<li><strong>Tenir compte de l'environnement de l'application<\/strong>Les caract\u00e9ristiques de l'appareil sont les suivantes : plage de temp\u00e9rature, vibrations, humidit\u00e9, etc.<\/li>\n<li><strong>\u00c9valuer le rapport qualit\u00e9-prix<\/strong>S\u00e9lection du niveau de pr\u00e9cision \u00e0 la demande<\/li>\n<\/ol>\n<h2>VIII. r\u00e9sum\u00e9<\/h2>\n<p>Les alliages mangan\u00e8se-cuivre sont le mat\u00e9riau de choix pour les shunts de pr\u00e9cision en raison de leur excellente stabilit\u00e9 \u00e0 la temp\u00e9rature et de leur fiabilit\u00e9 \u00e0 long terme. Depuis la s\u00e9lection des mati\u00e8res premi\u00e8res, la fonte et le moulage, le traitement et le moulage jusqu'au traitement thermique final et aux essais, chaque lien du processus affectera la performance du produit final. La compr\u00e9hension des propri\u00e9t\u00e9s des mat\u00e9riaux et des processus de fabrication aide les ing\u00e9nieurs \u00e0 mieux s\u00e9lectionner et appliquer les shunts pour r\u00e9pondre \u00e0 la demande croissante de mesures de courant de haute pr\u00e9cision dans les nouvelles \u00e9nergies, le stockage de l'\u00e9nergie, le comptage et d'autres domaines.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u5168\u9762\u4ecb\u7ecd\u9530\u94dc\u5408\u91d1\u7684\u6750\u6599\u7279\u6027\u3001\u5236\u9020\u5de5\u827a\u53ca\u5728\u5206\u6d41\u5668\u4e2d\u7684\u5e94\u7528\uff0c\u89e3\u5bc6\u9ad8\u7cbe\u5ea6\u5206\u6d41\u5668\u7684\u6838\u5fc3\u6280\u672f\u3002<\/p>","protected":false},"author":1,"featured_media":751,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u9530\u94dc\u5408\u91d1\u5206\u6d41\u5668\u6750\u6599\u7279\u6027\u4e0e\u5236\u9020\u5de5\u827a\u89e3\u6790 | \u8d5b\u5cf0\u7535\u5b50<\/title>\n<meta name=\"description\" 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