{"id":3700,"date":"2025-08-06T19:47:31","date_gmt":"2025-08-06T11:47:31","guid":{"rendered":"https:\/\/chiggofactory.com\/?p=3700"},"modified":"2025-08-06T19:48:23","modified_gmt":"2025-08-06T11:48:23","slug":"melting-points-of-metals","status":"publish","type":"post","link":"https:\/\/chiggofactory.com\/fr\/melting-points-of-metals\/","title":{"rendered":"Points de fusion des m\u00e9taux"},"content":{"rendered":"\n

Dans les applications industrielles, le choix du m\u00e9tal est influenc\u00e9 non seulement par des propri\u00e9t\u00e9s m\u00e9caniques comme la r\u00e9sistance, la duret\u00e9 et la densit\u00e9, mais aussi par les propri\u00e9t\u00e9s thermiques. L'une des propri\u00e9t\u00e9s thermiques les plus critiques \u00e0 consid\u00e9rer est le point de fusion du m\u00e9tal.<\/p>\n\n\n\n

Par exemple, les composants de la fournaise, les buses de carburant du moteur \u00e0 r\u00e9action et les syst\u00e8mes d'\u00e9chappement peuvent \u00e9chouer catastrophiquement si le m\u00e9tal fond. Le colmatage des orifices ou la d\u00e9faillance des moteurs peut se produire en cons\u00e9quence. Les points de fusion sont \u00e9galement cruciaux dans les processus de fabrication tels que la fusion, le soudage et la coul\u00e9e, o\u00f9 les m\u00e9taux doivent \u00eatre sous forme liquide. Cela n\u00e9cessite des outils con\u00e7us pour r\u00e9sister \u00e0 la chaleur extr\u00eame du m\u00e9tal fondu. M\u00eame si les m\u00e9taux peuvent subir des fractures induites par le fluage \u00e0 des temp\u00e9ratures inf\u00e9rieures \u00e0 leur point de fusion, les concepteurs utilisent souvent le point de fusion comme r\u00e9f\u00e9rence lors de la s\u00e9lection des alliages.<\/p>\n\n\n\n

Quel est le point de fusion des m\u00e9taux?<\/h2>\n\n\n\n

Le point de fusion est la temp\u00e9rature la plus basse \u00e0 laquelle un solide commence \u00e0 passer en un liquide sous pression atmosph\u00e9rique. \u00c0 cette temp\u00e9rature, les phases solides et liquides coexistent en \u00e9quilibre. Une fois le point de fusion atteint, la chaleur suppl\u00e9mentaire n'augmentera pas la temp\u00e9rature jusqu'\u00e0 ce que le m\u00e9tal soit compl\u00e8tement fondu. En effet, la chaleur fournie pendant le changement de phase est utilis\u00e9e pour surmonter la chaleur latente de la fusion.<\/p>\n\n\n\n

Diff\u00e9rents m\u00e9taux ont diff\u00e9rents points de fusion, qui sont d\u00e9termin\u00e9s par leur structure atomique et leur r\u00e9sistance de liaison. Les m\u00e9taux avec des dispositions atomiques \u00e9troitement emball\u00e9es ont g\u00e9n\u00e9ralement des points de fusion plus \u00e9lev\u00e9s; Le tungst\u00e8ne, par exemple, a l'un des plus \u00e9lev\u00e9s \u00e0 3422 \u00b0 C. La force des liaisons m\u00e9talliques influence la quantit\u00e9 d'\u00e9nergie n\u00e9cessaire pour surmonter les forces attractives entre les atomes et faire fondre le m\u00e9tal. Par exemple, les m\u00e9taux comme le platine et l'or ont des points de fusion relativement inf\u00e9rieurs par rapport aux m\u00e9taux de transition tels que le fer et le tungst\u00e8ne, en raison de leurs forces de liaison plus faibles.<\/p>\n\n\n\n

Comment changer le point de fusion d'un m\u00e9tal?<\/h2>\n\n\n\n

Le point de fusion d'un m\u00e9tal est g\u00e9n\u00e9ralement stable dans des conditions normales. Cependant, certains facteurs peuvent le modifier dans des circonstances sp\u00e9cifiques. Une m\u00e9thode courante estalliage<\/strong>\u2014Adding d'autres \u00e9l\u00e9ments \u00e0 un m\u00e9tal pur pour former un nouveau mat\u00e9riau avec une plage de fusion diff\u00e9rente. Par exemple, le m\u00e9lange de l'\u00e9tain avec du cuivre pour produire du bronze abaisse le point de fusion global par rapport au cuivre pur.<\/p>\n\n\n\n

Impuret\u00e9s<\/strong>peut \u00e9galement avoir un effet notable. M\u00eame les traces d'\u00e9l\u00e9ments \u00e9trangers peuvent perturber la liaison atomique et d\u00e9placer la temp\u00e9rature de fusion, plus \u00e9lev\u00e9e ou plus basse selon la substance.<\/p>\n\n\n\n

Forme physique<\/strong>compte aussi. Les m\u00e9taux sous forme de nanoparticules, de films minces ou de poudres fondent souvent \u00e0 des temp\u00e9ratures plus basses que leurs homologues en vrac en raison de leur surface \u00e9lev\u00e9e et de leur comportement atomique alt\u00e9r\u00e9.<\/p>\n\n\n\n

Enfin,pression extr\u00eame<\/strong>Peut changer comment les atomes interagissent, augmentant g\u00e9n\u00e9ralement le point de fusion en comprimant la structure atomique. Bien que ce soit rarement une pr\u00e9occupation dans les applications quotidiennes, cela devient une consid\u00e9ration cl\u00e9 dans la s\u00e9lection des mat\u00e9riaux et les \u00e9valuations de la s\u00e9curit\u00e9 pour les environnements \u00e0 forte stress tels que l'a\u00e9rospatiale, le forage en terre profonde et la recherche physique \u00e0 haute pression.<\/p>\n\n\n\n

Tableau des points de fusion en m\u00e9tal et en alliage<\/h2>\n\n\n\n

Points de fusion des m\u00e9taux et alliages communs<\/h3>\n\n\n\n
M\u00e9tal \/ alliage<\/strong><\/strong><\/td>Point de fusion (\u00b0 C)<\/strong><\/strong><\/td>Point de fusion (\u00b0 F)<\/strong><\/strong><\/td><\/tr>
Aluminium<\/td>660<\/td>1220<\/td><\/tr>
Laiton (alliage cu-zn)<\/td>~ 930 (d\u00e9pendante de la composition)<\/td>~ 1710<\/td><\/tr>
Bronze (alliage Cu-sn)<\/td>~ 913<\/td>~ 1675<\/td><\/tr>
Carbone<\/td>1425\u20131540<\/td>2600\u20132800<\/td><\/tr>
Fonte<\/td>~ 1204<\/td>~ 2200<\/td><\/tr>
Cuivre<\/td>1084<\/td>1983<\/td><\/tr>
Or<\/td>1064<\/td>1947<\/td><\/tr>
Fer<\/td>1538<\/td>2800<\/td><\/tr>
Plomb<\/td>328<\/td>622<\/td><\/tr>
Nickel<\/td>1453<\/td>2647<\/td><\/tr>
Argent<\/td>961<\/td>1762<\/td><\/tr>
Acier inoxydable<\/td>1375\u20131530 (d\u00e9pendant de la note)<\/td>2500\u20132785<\/td><\/tr>
\u00c9tain<\/td>232<\/td>450<\/td><\/tr>
Titane<\/td>1670<\/td>3038<\/td><\/tr>
Tungst\u00e8ne<\/td>~ 3400<\/td>~ 6150<\/td><\/tr>
Zinc<\/td>420<\/td>787<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Liste compl\u00e8te des points de fusion des m\u00e9taux \uff08haut \u00e0 bas\uff09<\/h3>\n\n\n\n
M\u00e9tal \/ alliage<\/strong><\/strong><\/td>Point de fusion (\u00b0 C)<\/strong><\/strong><\/td>Point de fusion (\u00b0 F)<\/strong><\/strong><\/td><\/tr>
Tungst\u00e8ne (w)<\/td>3400<\/td>6150<\/td><\/tr>
Rh\u00e9nium (re)<\/td>3186<\/td>5767<\/td><\/tr>
Osmium (OS)<\/td>3025<\/td>5477<\/td><\/tr>
Tantalum (TA)<\/td>2980<\/td>5400<\/td><\/tr>
Molybd\u00e8ne (MO)<\/td>2620<\/td>4750<\/td><\/tr>
Niobium (NB)<\/td>2470<\/td>4473<\/td><\/tr>
Iridium (IR)<\/td>2446<\/td>4435<\/td><\/tr>
Ruth\u00e9nium (ru)<\/td>2334<\/td>4233<\/td><\/tr>
Chrome (CR)<\/td>1860<\/td>3380<\/td><\/tr>
Vanadium (v)<\/td>1910<\/td>3470<\/td><\/tr>
Rhodium (RH)<\/td>1965<\/td>3569<\/td><\/tr>
Titane (Ti)<\/td>1670<\/td>3040<\/td><\/tr>
Cobalt (CO)<\/td>1495<\/td>2723<\/td><\/tr>
Nickel (ni)<\/td>1453<\/td>2647<\/td><\/tr>
Palladium (PD)<\/td>1555<\/td>2831<\/td><\/tr>
Platine (PT)<\/td>1770<\/td>3220<\/td><\/tr>
Thorium (th)<\/td>1750<\/td>3180<\/td><\/tr>
Hastelloy (alliage)<\/td>1320\u20131350<\/td>2410\u20132460<\/td><\/tr>
Inconel (alliage)<\/td>1390\u20131425<\/td>2540\u20132600<\/td><\/tr>
Incoloy (alliage)<\/td>1390\u20131425<\/td>2540\u20132600<\/td><\/tr>
Carbone<\/td>1371\u20131540<\/td>2500\u20132800<\/td><\/tr>
Fer \u00e0 fonte<\/td>1482\u20131593<\/td>2700\u20132900<\/td><\/tr>
Acier inoxydable<\/td>~ 1510<\/td>~ 2750<\/td><\/tr>
Monel (alliage)<\/td>1300\u20131350<\/td>2370\u20132460<\/td><\/tr>
B\u00e9ryllium (be)<\/td>1285<\/td>2345<\/td><\/tr>
Mangan\u00e8se (MN)<\/td>1244<\/td>2271<\/td><\/tr>
Uranium (u)<\/td>1132<\/td>2070<\/td><\/tr>
Cupronickel<\/td>1170\u20131240<\/td>2138-2264<\/td><\/tr>
Fer \u00e0 fonte ductile<\/td>~ 1149<\/td>~ 2100<\/td><\/tr>
Fonte<\/td>1127\u20131204<\/td>2060-2200<\/td><\/tr>
Or (AU)<\/td>1064<\/td>1945<\/td><\/tr>
Cuivre (Cu)<\/td>1084<\/td>1983<\/td><\/tr>
Silver (AG)<\/td>961<\/td>1761<\/td><\/tr>
Laiton rouge<\/td>990\u20131025<\/td>1810\u20131880<\/td><\/tr>
Bronze<\/td>~ 913<\/td>~ 1675<\/td><\/tr>
Laiton jaune<\/td>905\u2013932<\/td>1660\u20131710<\/td><\/tr>
Amiraut\u00e9 en laiton<\/td>900\u2013940<\/td>1650\u20131720<\/td><\/tr>
Argent<\/td>879<\/td>1614<\/td><\/tr>
Argent sterling<\/td>893<\/td>1640<\/td><\/tr>
Bronze de mangan\u00e8se<\/td>865\u2013890<\/td>1590\u20131630<\/td><\/tr>
Cuivre au b\u00e9ryllium<\/td>865\u2013955<\/td>1587\u20131750<\/td><\/tr>
Bronze en aluminium<\/td>600\u2013655<\/td>1190\u20131215<\/td><\/tr>
Aluminium (pur)<\/td>660<\/td>1220<\/td><\/tr>
Magn\u00e9sium (mg)<\/td>650<\/td>1200<\/td><\/tr>
Plutonium (PU)<\/td>~ 640<\/td>~ 1184<\/td><\/tr>
Antimoine (SB)<\/td>630<\/td>1166<\/td><\/tr>
Alliages de magn\u00e9sium<\/td>349\u2013649<\/td>660\u20131200<\/td><\/tr>
Zinc (Zn)<\/td>420<\/td>787<\/td><\/tr>
Cadmium (CD)<\/td>321<\/td>610<\/td><\/tr>
Bismuth (BI)<\/td>272<\/td>521<\/td><\/tr>
Babbitt (alliage)<\/td>~ 249<\/td>~ 480<\/td><\/tr>
\u00c9tain (sn)<\/td>232<\/td>450<\/td><\/tr>
Soude (alliage PB-SN)<\/td>~ 215<\/td>~ 419<\/td><\/tr>
S\u00e9l\u00e9nium (SE) *<\/td>217<\/td>423<\/td><\/tr>
Indium (in)<\/td>157<\/td>315<\/td><\/tr>
Sodium (NA)<\/td>98<\/td>208<\/td><\/tr>
Potassium (k)<\/td>63<\/td>145<\/td><\/tr>
Gallium (GA)<\/td>~ 30<\/td>~ 86<\/td><\/tr>
C\u00e9sium (CS)<\/td>~ 28<\/td>~ 83<\/td><\/tr>
Mercure (HG)<\/td>-39<\/td>-38<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Les principaux plats \u00e0 retenir:<\/strong><\/p>\n\n\n\n

    \n
  • Les m\u00e9taux \u00e0 pointe \u00e0 haut montage tels que le tungst\u00e8ne, le rh\u00e9nium et le tantale sont essentiels pour des applications de chaleur extr\u00eames. Ces m\u00e9taux conservent leur int\u00e9grit\u00e9 structurelle dans les environnements du four durs et de l'a\u00e9rospatiale. Le molybd\u00e8ne r\u00e9siste \u00e9galement \u00e0 la fusion et est tr\u00e8s pr\u00e9cieux pour la construction de fours \u00e0 haute temp\u00e9rature.<\/li>\n<\/ul>\n\n\n\n
      \n
    • Les m\u00e9taux \u00e0 virgule moyenne comme le fer, le cuivre et les aciers combinent des temp\u00e9ratures de fusion g\u00e9rables avec de bonnes propri\u00e9t\u00e9s m\u00e9caniques ou \u00e9lectriques, ce qui les rend polyvalentes pour la construction, l'outillage et les syst\u00e8mes \u00e9lectriques.<\/li>\n<\/ul>\n\n\n\n
        \n
      • Les m\u00e9taux \u00e0 faible point de fusion tels que le gallium, le c\u00e9sium, le mercure, l'\u00e9tain et le plomb sont pr\u00e9cieux pour des applications sp\u00e9cialis\u00e9es comme les soldats, les thermom\u00e8tres et les alliages \u00e0 faible fonte.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

        Dans les applications industrielles, le choix du m\u00e9tal est influenc\u00e9 non seulement par des propri\u00e9t\u00e9s m\u00e9caniques comme la r\u00e9sistance, la duret\u00e9 et la densit\u00e9, mais aussi par les propri\u00e9t\u00e9s thermiques. L’une des propri\u00e9t\u00e9s thermiques les plus critiques \u00e0 consid\u00e9rer est le point de fusion du m\u00e9tal. Par exemple, les composants de la fournaise, les buses […]<\/p>\n","protected":false},"author":2,"featured_media":3702,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3700","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\nThe Melting Points of Metals | Chiggo<\/title>\n<meta name=\"description\" content=\"The melting point of a metal is the temperature at which it transitions from solid to liquid. 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