![\"Sert](\"https:\/\/www.wolframcarbide.com\/wp-content\/uploads\/2025\/02\/What-is-hardmetal1.jpg\" "\\"\\"")
<\/a><\/figure>\n\n\n\n1. Giri\u015f Hardmetal, refrakter metal karb\u00fcrlerden yap\u0131lm\u0131\u015f kompozit bir malzemedir (\u00f6rne\u011fin tungsten karb\u00fcr<\/a> WC, titanyum karb\u00fcr TiC, vb.) ve toz metal\u00fcrjisi yoluyla ba\u011flay\u0131c\u0131 metaller (kobalt Co, nikel Ni, vb.). 1920'lerde ortaya \u00e7\u0131k\u0131\u015f\u0131ndan bu yana Hardmetal, m\u00fckemmel mekanik \u00f6zellikleri ve geni\u015f uygulama olanaklar\u0131 nedeniyle malzeme bilimi ve m\u00fchendisli\u011fi alan\u0131nda h\u0131zla bir ara\u015ft\u0131rma noktas\u0131 haline gelmi\u015ftir.<\/p>\n\n\n\n 2. Sert metalin bile\u015fimi ve s\u0131n\u0131fland\u0131r\u0131lmas\u0131 <\/p>\n\n\n\n 2.1 Bile\u015fim Sert metal esas olarak iki k\u0131s\u0131mdan olu\u015fur: Sert faz: genellikle a\u015fa\u011f\u0131daki gibi refrakter metal karb\u00fcrler wolfram karb\u00fcr<\/a> (WC), titanyum karb\u00fcr (TiC), tantal karb\u00fcr (TaC) vb. Bu karb\u00fcrler son derece y\u00fcksek sertli\u011fe ve a\u015f\u0131nma direncine sahiptir ve Hardmetal'in ana y\u00fck ta\u015f\u0131ma faz\u0131d\u0131r. Ba\u011flay\u0131c\u0131 faz: genellikle kobalt (Co) ve nikel (Ni) gibi metaller. Ba\u011flay\u0131c\u0131 faz\u0131n i\u015flevi sert faz par\u00e7ac\u0131klar\u0131n\u0131 birbirine ba\u011flamak ve belirli bir tokluk ve darbe direnci sa\u011flamakt\u0131r.<\/p>\n\n\n\n 2.2 S\u0131n\u0131fland\u0131rma Sert faz ve ba\u011flay\u0131c\u0131 faz aras\u0131ndaki farka g\u00f6re, Hardmetal a\u015fa\u011f\u0131daki kategorilere ayr\u0131labilir: WC-Co Sert Metal: Bu, kesici tak\u0131mlarda, kal\u0131plarda ve a\u015f\u0131nmaya dayan\u0131kl\u0131 par\u00e7alarda yayg\u0131n olarak kullan\u0131lan en yayg\u0131n Sert Metal t\u00fcr\u00fcd\u00fcr. WC-TiC-Co Hardmetal: TiC eklenerek, ala\u015f\u0131m\u0131n y\u00fcksek s\u0131cakl\u0131k performans\u0131 ve oksidasyon direnci geli\u015ftirilir, bu da y\u00fcksek h\u0131zl\u0131 kesim i\u00e7in uygundur. TiC-Ni-Mo Sert Metal: Sert faz olarak TiC ve ba\u011flay\u0131c\u0131 faz olarak Ni-Mo ile y\u00fcksek sertlik ve a\u015f\u0131nma direncine sahiptir ve y\u00fcksek hassasiyetli i\u015fleme i\u00e7in uygundur.<\/p>\n\n\n\n 3. Hardmetal haz\u0131rlama s\u00fcreci\u00a0<\/a><\/p>\n\n\n\n 3.1 Toz haz\u0131rlama Hardmetal'in haz\u0131rlanmas\u0131 i\u00e7in \u00f6ncelikle y\u00fcksek safl\u0131kta sert faz ve ba\u011flay\u0131c\u0131 faz tozlar\u0131n\u0131n elde edilmesi gerekir. Yayg\u0131n y\u00f6ntemler \u015funlar\u0131 i\u00e7erir: Karbonizasyon y\u00f6ntemi: metal tozunun karbon tozu ile y\u00fcksek s\u0131cakl\u0131kta reaksiyona sokularak karb\u00fcr elde edilmesi. \u0130ndirgeme y\u00f6ntemi: metal tozu elde etmek i\u00e7in metal oksitleri indirgeyerek.<\/p>\n\n\n\n 3.2 Kar\u0131\u015ft\u0131rma ve kal\u0131plama Sert faz ve ba\u011flay\u0131c\u0131 faz tozlar\u0131n\u0131 belirli bir oranda kar\u0131\u015ft\u0131r\u0131n ve bilyal\u0131 \u00f6\u011f\u00fctme gibi i\u015flemlerle e\u015fit olarak da\u011f\u0131t\u0131n. Kar\u0131\u015ft\u0131r\u0131lan toz preslenir ve istenen \u015fekilde bir bo\u015fluk olu\u015fturmak i\u00e7in kal\u0131plan\u0131r.<\/p>\n\n\n\n 3.3 Sinterleme Olu\u015fturulan i\u015flenmemi\u015f par\u00e7a, ba\u011flay\u0131c\u0131 faz\u0131 eritmek ve sert faz partik\u00fcllerini \u0131slatarak yo\u011fun bir ala\u015f\u0131m yap\u0131s\u0131 olu\u015fturmak i\u00e7in y\u00fcksek s\u0131cakl\u0131kta sinterlenir. Sinterleme i\u015flemi Hardmetal'in nihai performans\u0131 \u00fczerinde belirleyici bir etkiye sahiptir.<\/p>\n\n\n\n 4. Sert Metalin Mikroyap\u0131s\u0131\u00a0<\/a><\/p>\n\n\n\n 4.1 Sert faz ve ba\u011flay\u0131c\u0131 faz da\u011f\u0131l\u0131m\u0131 Hardmetal'in mikroyap\u0131s\u0131 temel olarak sert faz partik\u00fclleri ve ba\u011flay\u0131c\u0131 faz matrisinden olu\u015fur. Sert faz partik\u00fcllerinin boyutu, \u015fekli ve da\u011f\u0131l\u0131m\u0131 ala\u015f\u0131m\u0131n performans\u0131 \u00fczerinde \u00f6nemli bir etkiye sahiptir. \u0130nce sert faz partik\u00fclleri ala\u015f\u0131m\u0131n sertli\u011fini ve a\u015f\u0131nma direncini art\u0131rabilirken, homojen da\u011f\u0131l\u0131m ala\u015f\u0131m\u0131n toklu\u011funu art\u0131rmaya yard\u0131mc\u0131 olur.<\/p>\n\n\n\n 4.2 Tane s\u0131n\u0131rlar\u0131 ve faz s\u0131n\u0131rlar\u0131 Sert metaldeki tane s\u0131n\u0131rlar\u0131 ve faz s\u0131n\u0131rlar\u0131, mekanik \u00f6zelliklerini etkileyen \u00f6nemli fakt\u00f6rlerdir. Tane s\u0131n\u0131r\u0131n\u0131n mukavemeti ve faz s\u0131n\u0131r\u0131n\u0131n ba\u011flanma durumu, ala\u015f\u0131m\u0131n k\u0131r\u0131lma direncini ve a\u015f\u0131nma direncini do\u011frudan belirler.<\/p>\n\n\n\n 5. Sert Metalin mekanik \u00f6zellikleri <\/p>\n\n\n\n 5.1 Sertlik Sert metalin sertli\u011fi esas olarak sert faz\u0131n t\u00fcr\u00fcne ve i\u00e7eri\u011fine ba\u011fl\u0131d\u0131r. WC-Co Hardmetal'in sertli\u011fi genellikle HRA 88-94 aras\u0131ndad\u0131r ve bu da s\u0131radan \u00e7elikten \u00e7ok daha y\u00fcksektir.<\/p>\n\n\n\n 5.2 A\u015f\u0131nma direnci Hardmetal'in a\u015f\u0131nma direnci en \u00f6nemli \u00f6zelliklerinden biridir. Sert faz\u0131n y\u00fcksek sertli\u011fi ve ba\u011flay\u0131c\u0131 faz\u0131n iyi toklu\u011fu nedeniyle, Hardmetal y\u00fcksek h\u0131zl\u0131 kesme ve a\u011f\u0131r y\u00fck ko\u015fullar\u0131 alt\u0131nda m\u00fckemmel a\u015f\u0131nma direnci sergiler. 5.3 E\u011filme dayan\u0131m\u0131 Hardmetal'in e\u011filme dayan\u0131m\u0131 esas olarak ba\u011flay\u0131c\u0131 faz i\u00e7eri\u011finden ve sert faz\u0131n partik\u00fcl boyutundan etkilenir. Uygun ba\u011flay\u0131c\u0131 faz i\u00e7eri\u011fi ala\u015f\u0131m\u0131n e\u011filme mukavemetini art\u0131rabilir, ancak \u00e7ok y\u00fcksek ba\u011flay\u0131c\u0131 faz i\u00e7eri\u011fi ala\u015f\u0131m\u0131n sertli\u011fini azaltacakt\u0131r.<\/p>\n\n\n\n 5.4 Y\u00fcksek s\u0131cakl\u0131k performans\u0131 Hardmetal y\u00fcksek s\u0131cakl\u0131klarda hala y\u00fcksek sertlik ve mukavemeti koruyabilir, bu da y\u00fcksek s\u0131cakl\u0131kta kesme ve s\u0131cak i\u015flemede yayg\u0131n olarak kullan\u0131lmas\u0131n\u0131 sa\u011flar.<\/p>\n\n\n\n 6. Sert Metal Uygulamas\u0131 <\/p>\n\n\n\n 6.1 Kesici tak\u0131mlar Sert metal, a\u015fa\u011f\u0131daki gibi kesici tak\u0131mlarda yayg\u0131n olarak kullan\u0131l\u0131r tornalama aletleri<\/a>, freze b\u0131\u00e7aklar\u0131 ve karb\u00fcr matkap u\u00e7lar\u0131<\/a>. \u00d6rne\u011fin, Hardmetal \u00e7ubuklar freze b\u0131\u00e7aklar\u0131n\u0131 ve matkap u\u00e7lar\u0131n\u0131 i\u015flemek i\u00e7in kullan\u0131l\u0131r. Y\u00fcksek sertli\u011fi ve a\u015f\u0131nma direnci, y\u00fcksek h\u0131zl\u0131 kesme ve a\u011f\u0131r y\u00fck kesme ko\u015fullar\u0131nda iyi performans g\u00f6stermesini sa\u011flar.<\/p>\n\n\n\n 6.2 Madencilik aletleri Hardmetal, kaya delici u\u00e7lar ve kazmalar gibi madencilik aletlerinin \u00fcretiminde kullan\u0131l\u0131r. Y\u00fcksek a\u015f\u0131nma direnci ve darbe dayan\u0131m\u0131, zorlu madencilik ortamlar\u0131nda iyi performans g\u00f6stermesini sa\u011flar.<\/p>\n\n\n\n![\"Sert](\"https:\/\/www.wolframcarbide.com\/wp-content\/uploads\/2025\/02\/density-of-tungsten-carbide__.jpg\" "\\"\\"")
<\/figure>\n\n\n\n![\"sert](\"https:\/\/www.wolframcarbide.com\/wp-content\/uploads\/2025\/02\/cutting-tools.jpg\" "\\"\\"")
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