{"id":2803,"date":"2025-01-14T22:00:55","date_gmt":"2025-01-14T14:00:55","guid":{"rendered":"https:\/\/www.wolframcarbide.com\/?p=2803"},"modified":"2025-01-14T22:01:44","modified_gmt":"2025-01-14T14:01:44","slug":"le-carbure-de-tungstene-est-il-fragile","status":"publish","type":"post","link":"https:\/\/www.wolframcarbide.com\/fr\/is-tungsten-carbide-brittle\/","title":{"rendered":"Le carbure de tungst\u00e8ne est-il fragile ?"},"content":{"rendered":"

Le carbure de tungst\u00e8ne est-il fragile ?<\/h2>\n\n\n\n

1. caract\u00e9ristiques du carbure de tungst\u00e8ne :<\/p>\n\n\n\n

Le carbure de tungst\u00e8ne pr\u00e9sente les avantages d'une grande duret\u00e9, d'une grande solidit\u00e9, d'une grande r\u00e9sistance \u00e0 l'usure et d'une grande r\u00e9sistance aux temp\u00e9ratures \u00e9lev\u00e9es, et constitue un mat\u00e9riau important pour les outils de coupe. Cependant, le carbure de tungst\u00e8ne est un mat\u00e9riau important pour les outils de coupe, carbure de tungst\u00e8ne<\/a> pr\u00e9sente \u00e9galement des lacunes, qui se manifestent principalement par une faible t\u00e9nacit\u00e9 et une fragilit\u00e9.<\/p>\n\n\n\n

\"Le<\/a><\/figure>\n\n\n\n

2. concentration des contraintes internes :<\/p>\n\n\n\n

Le carbure de tungst\u00e8ne est obtenu par frittage \u00e0 haute temp\u00e9rature de poudre m\u00e9tallique et de poudre de carbure. Au cours de ce processus, des contraintes intrins\u00e8ques se forment en raison des coefficients de dilatation thermique diff\u00e9rents des mat\u00e9riaux. Lorsque le mat\u00e9riau de carbure de tungst\u00e8ne est transform\u00e9 et form\u00e9, si la contrainte intrins\u00e8que se produit, le carbure de tungst\u00e8ne ne peut pas \u00eatre utilis\u00e9. stress interne<\/a> n'est pas raisonnablement \u00e9limin\u00e9e, ces contraintes seront concentr\u00e9es dans le mat\u00e9riau, ce qui entra\u00eenera des probl\u00e8mes tels que la fissuration et la d\u00e9lamination du mat\u00e9riau, qui rendront le carbure de tungst\u00e8ne cassant.<\/p>\n\n\n\n

3. fissuration des joints de grains :<\/p>\n\n\n\n

Les joints de grains sont les maillons faibles du carbure de tungst\u00e8ne et les endroits o\u00f9 le mat\u00e9riau est susceptible de se fissurer. Lorsque le carbure de tungst\u00e8ne est \u00e0 haute temp\u00e9rature, il est facile de le plier et de le briser en raison du faible espacement mol\u00e9culaire du mat\u00e9riau au niveau du joint de grain. Dans les applications de traitement r\u00e9elles, si la force de coupe est trop importante et la temp\u00e9rature trop \u00e9lev\u00e9e, le joint de grain du mat\u00e9riau en carbure de tungst\u00e8ne sera plus facilement endommag\u00e9.<\/p>\n\n\n\n

4. influence de la technologie de transformation :<\/p>\n\n\n\n

La technologie de traitement du carbure de tungst\u00e8ne affecte \u00e9galement sa r\u00e9sistance et sa t\u00e9nacit\u00e9. Par exemple, un traitement thermique excessif, un refroidissement excessif, une surcharge, etc. pendant le traitement affecteront les propri\u00e9t\u00e9s m\u00e9caniques du carbure de tungst\u00e8ne. En outre, les diff\u00e9rentes m\u00e9thodes de coupe, la s\u00e9lection des param\u00e8tres de coupe, etc. ont \u00e9galement un certain impact sur la r\u00e9sistance et la t\u00e9nacit\u00e9 des mat\u00e9riaux en carbure de tungst\u00e8ne.<\/p>\n\n\n\n

En r\u00e9sum\u00e9, les principales raisons de la fragilit\u00e9 du carbure de tungst\u00e8ne comprennent des probl\u00e8mes tels que la concentration de contraintes intrins\u00e8ques et la fissuration des joints de grains. Afin d'am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques des mat\u00e9riaux en carbure de tungst\u00e8ne, il est n\u00e9cessaire de renforcer le contr\u00f4le et l'optimisation du processus de pr\u00e9paration des mat\u00e9riaux et de la technologie de traitement pour am\u00e9liorer la t\u00e9nacit\u00e9 et la durabilit\u00e9 du mat\u00e9riau. <\/p>","protected":false},"excerpt":{"rendered":"

Is tungsten carbide brittle 1.Characteristics of tungsten carbide: Tungsten carbide has the advantages of high hardness, high strength, high wear resistance, and high temperature resistance, and is an important cutting tool material.\u00a0However, tungsten carbide also has shortcomings, mainly manifested in low toughness and brittleness. 2.Internal stress concentration: Tungsten carbide is obtained by high-temperature sintering of 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and high temperature resistance, and is an important cutting tool material.\u00a0However, tungsten carbide also has shortcomings, mainly manifested in low toughness and brittleness. 2.Internal stress concentration: Tungsten carbide is obtained by high-temperature sintering of\u2026","_links":{"self":[{"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/posts\/2803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/comments?post=2803"}],"version-history":[{"count":2,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/posts\/2803\/revisions"}],"predecessor-version":[{"id":2806,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/posts\/2803\/revisions\/2806"}],"wp:attachment":[{"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/media?parent=2803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/categories?post=2803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wolframcarbide.com\/fr\/wp-json\/wp\/v2\/tags?post=2803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}