{"id":18365,"date":"2019-11-21T02:52:33","date_gmt":"2019-11-21T02:52:33","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=13832"},"modified":"2020-05-07T02:41:01","modified_gmt":"2020-05-07T02:41:01","slug":"application-of-grain-growth-inhibitors-in-cemented-carbide","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/tr\/application-of-grain-growth-inhibitors-in-cemented-carbide\/","title":{"rendered":"\u00c7imentolu Karb\u00fcrde Tah\u0131l B\u00fcy\u00fcme \u0130nhibit\u00f6rlerinin Uygulanmas\u0131"},"content":{"rendered":"
\n

Semente karb\u00fcrdeki WC taneleri 0,5 \u03bc m'den daha az oldu\u011funda, tah\u0131llar ne kadar ince olursa, kusurlar o kadar az olur ve e\u011filme mukavemeti ve sertli\u011fi o kadar y\u00fcksek olur Ultra ince semente karb\u00fcr \u00fcretmek i\u00e7in kullan\u0131lan WC tozunun partik\u00fcl boyutu \u00e7ok daha k\u00fc\u00e7\u00fckt\u00fcr genel \u00e7imentolu karb\u00fcrde kullan\u0131lan WC tozunun. WC tozu y\u00fcksek aktiviteye sahiptir ve \u00e7atlak kaynaklar\u0131ndan biri olan sinterleme i\u015fleminde tane b\u00fcy\u00fcmesine neden olmak kolayd\u0131r.<\/p>\n\n\n\n

\u015eu anda, tane boyutunu kontrol etmek i\u00e7in iki ana y\u00f6ntem vard\u0131r:<\/p>\n\n\n\n

\u0130lk olarak, yeni bir sinterleme i\u015flemi benimsenmi\u015ftir. Sonu\u00e7lar, d\u00fczinelerce nano WC Co kompozit tozunun yo\u011funla\u015ft\u0131r\u0131lmas\u0131n\u0131n, 30 saniye boyunca 1400 at'de sinterlendikten sonra tamamlanabilece\u011fini ve tane boyutunun 0.2 \u03bcm oldu\u011funu, ancak sinterleme s\u00fcresinin 60'lara uzat\u0131lmas\u0131 halinde tane b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn h\u0131zla b\u00fcy\u00fcyece\u011fini g\u00f6stermektedir Nano WC Co \u00e7imentolu karb\u00fcr kompozit toz i\u00e7in kullan\u0131labilecek yeni sinterleme i\u015flemleri esas olarak mikrodalga sinterleme, s\u0131cak izostatik presleme sinterleme, de\u015farj plazma sinterleme ve iki a\u015famal\u0131 sinterlemeyi i\u00e7erir.<\/p>\n\n\n\n

\u0130kincisi, tane b\u00fcy\u00fcmesini engellemek i\u00e7in tane b\u00fcy\u00fcmesi inhibit\u00f6rleri eklemek, VC, TAC ve Cr3C2 s\u0131kl\u0131kla inhibit\u00f6rler olarak kullan\u0131l\u0131r.<\/p>\n\n\n\n

Bu yaz\u0131da, inhibisyon mekanizmas\u0131, inhibit\u00f6rlerin etkisini etkileyen fakt\u00f6rler, inhibit\u00f6r ekleme yolu, yayg\u0131n olarak kullan\u0131lan inhibit\u00f6rler, en son inhibit\u00f6rlerin geli\u015fimi ve inhibit\u00f6rlerin ala\u015f\u0131mlar\u0131n kapsaml\u0131 \u00f6zellikleri \u00fczerindeki etkisi tan\u0131t\u0131lmaktad\u0131r.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u0130nhibisyon mekanizmas\u0131 ve inhibit\u00f6rlerin etkileyen fakt\u00f6rleri<\/strong><\/strong><\/h2>\n\n\n\n

Semente karb\u00fcr\u00fcn tane b\u00fcy\u00fcmesi i\u00e7in itici g\u00fc\u00e7, y\u00fczey enerjisinin azalmas\u0131ndan gelir. WC'nin tane b\u00fcy\u00fcmesi esas olarak WC'nin \u00e7\u00f6z\u00fcnme \u00e7\u00f6keltme mekanizmas\u0131 vas\u0131tas\u0131yla yap\u0131l\u0131r, yani k\u00fc\u00e7\u00fck tane WC s\u0131v\u0131 fazda \u00e7\u00f6z\u00fcn\u00fcr ve b\u00fcy\u00fck tane WC'nin y\u00fczeyinde \u00e7\u00f6kelir. WC Co \u00e7imentolu karb\u00fcrler i\u00e7in, WC tanelerinin kabala\u015ft\u0131r\u0131lmas\u0131, tah\u0131l b\u00fcy\u00fcme inhibit\u00f6rlerinin eklenmesiyle s\u0131n\u0131rland\u0131r\u0131labilir.  <\/p>\n\n\n\n

\u0130nhibit\u00f6rlerin eklenmesi, WC'nin \u00e7\u00f6z\u00fcnme \u00e7\u00f6kelme h\u0131z\u0131n\u0131 yava\u015flat\u0131r ve \u00fc\u00e7 inhibisyon mekanizmas\u0131 vard\u0131r:<\/p>\n\n\n\n

1. \u0130nhibit\u00f6r, WC'nin y\u00fczey enerjisini ve WC'nin s\u0131v\u0131 fazdaki \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc azaltan karb\u00fcr par\u00e7ac\u0131klar\u0131n\u0131n y\u00fczeyinde adsorbe olur.<\/p>\n\n\n\n

2. \u0130nhibit\u00f6r, s\u0131v\u0131 yeniden kristalle\u015ftirme yoluyla WC'nin b\u00fcy\u00fcmesini yava\u015flatan s\u0131v\u0131 CO i\u00e7inde \u00e7\u00f6z\u00fcn\u00fcr.<\/p>\n\n\n\n

3. WC aray\u00fcz\u00fcn\u00fcn g\u00f6\u00e7\u00fc, WC partik\u00fcllerinin birikmesini ve b\u00fcy\u00fcmesini engelleyen WC \/ WC aray\u00fcz\u00fc boyunca inhibit\u00f6rlerin ayr\u0131lmas\u0131yla engellenmi\u015ftir.<\/p>\n\n\n\n

\u0130nhibit\u00f6rlerin inhibisyon etkisi a\u015fa\u011f\u0131daki fakt\u00f6rlerle belirlenir:<\/p>\n\n\n\n

1. WC tozunun tanecik boyutunun azalt\u0131lmas\u0131, WC Co. inhibit\u00f6rlerinin tane s\u0131n\u0131r alan\u0131n\u0131 artt\u0131r\u0131r, WC y\u00fczeyinde geni\u015f bir \u015fekilde da\u011f\u0131t\u0131labilir, ancak s\u00fcresiz olarak artt\u0131r\u0131lamaz. S\u0131n\u0131r de\u011ferleri, ba\u011flanma faz\u0131ndaki doyma konsantrasyonlar\u0131na ba\u011fl\u0131d\u0131r.<\/p>\n\n\n\n

2. Kobalt i\u00e7eri\u011fi. D\u00fc\u015f\u00fck ba\u011flay\u0131c\u0131 i\u00e7eri\u011fi ve k\u0131sa serbest strok ile inhibit\u00f6r, belirli bir s\u0131cakl\u0131kta rol\u00fcn\u00fc oynamak kolayd\u0131r.<\/p>\n\n\n\n

3. toz kar\u0131\u015ft\u0131rma Tekd\u00fczelik. Ba\u011flay\u0131c\u0131 faz\u0131n kar\u0131\u015f\u0131k toz i\u00e7indeki dengesiz da\u011f\u0131l\u0131m\u0131, inhibit\u00f6rlerin sinterleme i\u015fleminde WC tane b\u00fcy\u00fcmesi \u00fczerindeki etki alan\u0131n\u0131n fark\u0131na yol a\u00e7acakt\u0131r; kar\u0131\u015f\u0131k tozdaki inhibit\u00f6rlerin e\u015fit olmayan da\u011f\u0131l\u0131m\u0131 veya b\u00fcy\u00fck boyutu, inhibit\u00f6rlerin gerektirdi\u011fi dif\u00fczyon yolunu uzatacakt\u0131r.<\/p>\n\n\n\n

4. Ala\u015f\u0131m sinterleme s\u0131cakl\u0131\u011f\u0131. Sinterleme s\u0131cakl\u0131\u011f\u0131n\u0131n artmas\u0131yla, y\u00fcksek faz inhibit\u00f6r konsantrasyonunu s\u0131v\u0131 fazda tutmak i\u00e7in s\u0131v\u0131 faz miktar\u0131 ve tane b\u00fcy\u00fcme inhibit\u00f6r\u00fcn\u00fcn i\u00e7eri\u011finin artt\u0131r\u0131lmas\u0131 gerekir. Bu nedenle, toz boyutu ne kadar k\u00fc\u00e7\u00fck olursa, kobalt i\u00e7eri\u011fi o kadar d\u00fc\u015f\u00fck olur, toz kar\u0131\u015f\u0131m\u0131 ne kadar homojen olursa ve sinterleme s\u0131cakl\u0131\u011f\u0131 ne kadar d\u00fc\u015f\u00fck olursa, inhibit\u00f6r\u00fcn inhibisyon etkisi o kadar iyidir.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Tah\u0131l b\u00fcy\u00fcme inhibit\u00f6r\u00fcn\u00fcn yollar\u0131n\u0131 ekleme<\/strong><\/h2>\n\n\n\n

\u0130nhibit\u00f6rler esas olarak \u00fc\u00e7 \u015fekilde eklenir:<\/p>\n\n\n\n

1. Islak \u00f6\u011f\u00fctme i\u015fleminde WC, CO ve tane b\u00fcy\u00fcme inhibit\u00f6r\u00fc kar\u0131\u015ft\u0131r\u0131ld\u0131.<\/p>\n\n\n\n

2. Karbonizasyondan \u00f6nce, tane b\u00fcy\u00fcme inhibit\u00f6r\u00fcne kar\u015f\u0131l\u0131k gelen oksit kar\u0131\u015ft\u0131r\u0131ld\u0131.<\/p>\n\n\n\n

3. \u00dc\u00e7\u00fcnc\u00fc y\u00f6ntem, inhibit\u00f6r\u00fcn tuz \u00e7\u00f6zeltisini mavi tungsten veya sar\u0131 tungsten ile \u0131slatmak ve indirgeme i\u015fleminden \u00f6nce mavi tungsten veya sar\u0131 tungsten ile kaplama tozu olu\u015fturmak ve daha sonra termal ayr\u0131\u015fma ve indirgeme yapmakt\u0131r.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Tah\u0131l b\u00fcy\u00fcme inhibit\u00f6rleri t\u00fcrleri<\/strong><\/strong><\/h2>\n\n\n\n

Ge\u00e7i\u015f metal karb\u00fcrleri<\/strong><\/strong><\/h3>\n\n\n\n

Ge\u00e7i\u015f metali karb\u00fcrleri, tah\u0131l b\u00fcy\u00fcmesinin yayg\u0131n inhibit\u00f6rleridir. Ge\u00e7i\u015f metali karb\u00fcrlerinin WC tanelerini \u00f6nlemedeki etkinli\u011fi kendi termodinamik stabiliteleri ile ilgilidir. Termodinamik kararl\u0131l\u0131klar\u0131n\u0131n s\u0131ras\u0131 VC> Cr3C2> NBC> TAC> tic> ZrC> HFC'dir. Bununla birlikte, her bir karb\u00fcr t\u00fcr\u00fcn\u00fcn ilave edilebilecek maksimum bir miktar\u0131 vard\u0131r, bu da WC tanelerinin b\u00fcy\u00fcmesini inhibe etme \u00fczerinde ba\u015fka bir etkisi yoktur. Belirli bir s\u0131cakl\u0131kta, karb\u00fcr katk\u0131 maddelerinin miktar\u0131, ba\u011flay\u0131c\u0131 fazdaki karb\u00fcr\u00fcn doyma konsantrasyonuna ba\u011fl\u0131d\u0131r ve ba\u011flay\u0131c\u0131 faz\u0131n i\u00e7eri\u011fi Tablo 2, CO faz\u0131ndaki \u00e7e\u015fitli katk\u0131 maddelerinin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc g\u00f6sterir. Tablodan, VC ve Cr3C2'nin CO faz\u0131nda en y\u00fcksek \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011fe sahip oldu\u011fu ve en d\u00fc\u015f\u00fck ikili \u00f6tektik s\u0131cakl\u0131\u011fa sahip olduklar\u0131 g\u00f6r\u00fclebilir, bu nedenle yayg\u0131n olarak WC Co tane b\u00fcy\u00fcme inhibit\u00f6rleri olarak kullan\u0131l\u0131rlar.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Nadir toprak elementi<\/strong><\/h3>\n\n\n\n

Nadir toprak elementi, tah\u0131l b\u00fcy\u00fcmesini engelleyebilen, yap\u0131 da\u011f\u0131l\u0131m\u0131n\u0131 iyile\u015ftirebilen, tane s\u0131n\u0131r\u0131n\u0131 safla\u015ft\u0131rabilen ve \u00e7imentolu karb\u00fcr\u00fcn g\u00fc\u00e7lendirilmesinde ve sertle\u015ftirilmesinde etkili bir rol oynayabilen yayg\u0131n katk\u0131 maddelerinden biridir. Ayn\u0131 zamanda, nadir toprak ayr\u0131ca \u00e7imentolu karb\u00fcr\u00fcn sinterleme s\u0131cakl\u0131\u011f\u0131n\u0131 azaltabilir, bu da tah\u0131l b\u00fcy\u00fcmesini kontrol etmek ve Sinterleme Yo\u011funla\u015ft\u0131rmas\u0131 aras\u0131ndaki \u00e7eli\u015fkiyi \u00e7\u00f6zebilir. ala\u015f\u0131m y\u00fczeyindeki makro bas\u0131n\u00e7 stresinin artmas\u0131, nadir toprak oksitlerinin eklenmesiyle WC Co \u00e7imentolu karb\u00fcr\u00fcn mukavemetinin artmas\u0131n\u0131n \u00f6nemli bir nedenidir.<\/p>\n\n\n\n

Bor ve fosfor<\/strong><\/strong><\/h3>\n\n\n\n

Sementli karb\u00fcr\u00fcn borlu sinterleme s\u0131cakl\u0131\u011f\u0131n\u0131n, sinterleme s\u0131cakl\u0131\u011f\u0131n\u0131n azalmas\u0131yla 1340 \u2103'ye d\u00fc\u015f\u00fcr\u00fclebildi\u011fi, ala\u015f\u0131m\u0131n mikro tanelerinin a\u00e7\u0131k bir \u015fekilde rafine edildi\u011fi, bu da ala\u015f\u0131m performans\u0131n\u0131n iyile\u015ftirilmesine yard\u0131mc\u0131 oldu\u011fu ve bor eklenmesi, ba\u011flanma faz\u0131 ve WC faz\u0131n\u0131n \u0131slanabilirli\u011fi \u00fczerinde \u00e7ok az etkiye sahiptir ve ala\u015f\u0131m\u0131n e\u011filme mukavemeti etkilenmez. WC Co'nun sinterleme s\u0131cakl\u0131\u011f\u0131, az miktarda Ni ve P tozu eklenerek 1050-1100 \u00b0 C'ye d\u00fc\u015f\u00fcr\u00fclebilir. Mekanizma, Ni-P'nin \u00f6tektik s\u0131cakl\u0131\u011f\u0131n\u0131n, Ni ve P ilave edildikten sonra Co'nun erime noktas\u0131ndan \u00e7ok daha d\u00fc\u015f\u00fck olmas\u0131d\u0131r, s\u0131v\u0131 faz\u0131, daha d\u00fc\u015f\u00fck bir s\u0131cakl\u0131kta ortaya \u00e7\u0131kabilir, bu da kat\u0131 partik\u00fcllerin \u00e7\u00f6z\u00fcnmesini ve \u00e7\u00f6kmesini ve \u00e7er\u00e7eve \u00f6nceden ger\u00e7ekle\u015fir ve sinterleme i\u015flemi daha yeterlidir, b\u00f6ylece WC tanelerinin b\u00fcy\u00fcmesini engeller.<\/p>\n\n\n\n

Bak\u0131r molibden metal inhibit\u00f6r\u00fc<\/strong><\/strong><\/h3>\n\n\n\n

Wc-13fe \/ Co \/ Ni semente karb\u00fcre az miktarda Cu ilavesi, k\u00fcreselle\u015fmi\u015f WC tanelerini rafine edebilir. Bunun nedeni, Cu'nun sinterleme i\u015flemi s\u0131ras\u0131nda Fe \/ Co \/ Ni ba\u011flay\u0131c\u0131 i\u00e7inde \u00e7\u00f6z\u00fcnmesi, ba\u011flay\u0131c\u0131daki WC'nin \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fcn\u00fc azaltmas\u0131, b\u00f6ylece \u00e7\u00f6keltme ve \u00e7\u00f6keltme i\u015flemi s\u0131ras\u0131nda tane b\u00fcy\u00fcme oran\u0131n\u0131 azaltmas\u0131d\u0131r. Bak\u0131r da WC tanelerini k\u00fcreselle\u015ftirir. Semente karb\u00fcr\u00fcn sinterleme i\u015fleminde, molibden \u00e7imentolu faz\u0131n etraf\u0131na kaplan\u0131r, bu da \u00e7imentolu faz ile \u00e7imentolu faz aras\u0131ndaki \u0131slanabilirli\u011fi geli\u015ftirir, b\u00f6ylece \u00e7imentolu faz partik\u00fcllerini rafine eder<\/p>\n\n\n\n

Tah\u0131l b\u00fcy\u00fcme inhibit\u00f6r\u00fcn\u00fcn ala\u015f\u0131m \u00f6zellikleri \u00fczerine etkisi<\/strong><\/h2>\n\n\n\n

Tah\u0131l b\u00fcy\u00fcme inhibit\u00f6rlerinin ala\u015f\u0131m\u0131n \u00f6zellikleri \u00fczerindeki etkisi esas olarak ala\u015f\u0131m\u0131n sertli\u011fine ve e\u011filme mukavemetine yans\u0131r. Farkl\u0131 katk\u0131 maddelerinin tane boyutunu inhibe etmek i\u00e7in farkl\u0131 mekanizmalar\u0131 vard\u0131r, bu nedenle farkl\u0131 tah\u0131l b\u00fcy\u00fcmesi inhibit\u00f6rlerinin \u00f6zellikleri \u00fczerinde farkl\u0131 etkileri vard\u0131r.<\/p>\n\n\n\n

Ge\u00e7i\u015f metal karb\u00fcrleri<\/strong><\/strong><\/h3>\n\n\n\n

VC, Cr 3C2 ve di\u011fer katk\u0131 maddelerinin eklenmesi, WC Co \u00e7imentolu karb\u00fcr\u00fcn \u0131s\u0131 direncini ve a\u015f\u0131nma direncini etkili bir \u015fekilde art\u0131rabilir. Ayr\u0131ca, katk\u0131 maddesi uygun oldu\u011funda ala\u015f\u0131m\u0131n y\u00fcksek s\u0131cakl\u0131k mukavemeti ve y\u00fcksek s\u0131cakl\u0131k sertli\u011fi etkili bir \u015fekilde geli\u015ftirilebilir, ancak ala\u015f\u0131m\u0131n oda s\u0131cakl\u0131\u011f\u0131 mukavemeti azalt\u0131labilir ve ala\u015f\u0131m k\u0131r\u0131lgan hale gelir. Bu nedenle, katk\u0131 maddelerinin miktar\u0131 belirli bir aral\u0131kta kontrol edilmelidir. \u00d6rne\u011fin, WC-6% CO ve WC-10% Co ala\u015f\u0131mlar\u0131 i\u00e7in, cr2c3 eklenmesi ala\u015f\u0131m\u0131n oda s\u0131cakl\u0131\u011f\u0131 e\u011filme mukavemetini azaltt\u0131. Cr2C3 i\u00e7eri\u011fi 0.3% ~ 0.5% (CO i\u00e7eri\u011finin k\u00fctle fraksiyonu) oldu\u011funda, y\u00fcksek Co ala\u015f\u0131m\u0131n\u0131n oda s\u0131cakl\u0131\u011f\u0131 e\u011filme mukavemeti a\u00e7\u0131k\u00e7a etkilenmeyecektir, ancak d\u00fc\u015f\u00fck Co ala\u015f\u0131m\u0131 i\u00e7in oda s\u0131cakl\u0131\u011f\u0131 e\u011filme mukavemeti a\u00e7\u0131k\u00e7a azalt\u0131lacak. TAC ve NBC eklenmesi ayn\u0131 sonucu verecektir VC'nin wc-6.5% Co semente karb\u00fcrlerin mikro yap\u0131s\u0131 ve \u00f6zellikleri \u00fczerindeki etkisi bulunmu\u015ftur. VC'nin WC tanelerinin b\u00fcy\u00fcmesini inhibe etti\u011fi, bunun belirgin tane ar\u0131tmas\u0131yla sonu\u00e7land\u0131\u011f\u0131 ve tane boyutunun da\u011f\u0131l\u0131m\u0131n\u0131 daraltt\u0131\u011f\u0131 bulunmu\u015ftur. Tane boyutu VC eklenmeden 0,5-1 \u03bc m'den 2,0% VC eklenerek 0,15 \u03bc m'ye d\u00fc\u015f\u00fcr\u00fcld\u00fc. Ayn\u0131 zamanda, ala\u015f\u0131m\u0131n sertli\u011fi VC eklenerek b\u00fcy\u00fck \u00f6l\u00e7\u00fcde iyile\u015ftirilir ve VC i\u00e7eri\u011fi 2.0% oldu\u011funda maksimum de\u011fer 94.1 HRA'd\u0131r. Ancak ayn\u0131 zamanda ala\u015f\u0131m\u0131n mukavemetini azalt\u0131r VC i\u00e7eri\u011fi 0.5% oldu\u011funda, ala\u015f\u0131m\u0131n sertli\u011fi ve sertli\u011fi 93.0hra ve 11.2MPa \u00b7 M 1 \/ 2'dir ve kapsaml\u0131 \u00f6zellikler en y\u00fcksektir. TAC ilavesi sadece WC tanelerinin \u00e7ok fazla b\u00fcy\u00fcmesini \u00f6nlemekle kalmaz, ayn\u0131 zamanda ala\u015f\u0131m\u0131n karbon i\u00e7eri\u011fini de azalt\u0131r.<\/p>\n\n\n\n

Nadir toprak elementi<\/strong><\/strong><\/h3>\n\n\n\n

WC-20 (Fe \/ Co \/ Ni) ala\u015f\u0131m\u0131n\u0131n sertli\u011fi, nadir toprak i\u00e7eri\u011finin artmas\u0131yla artm\u0131\u015ft\u0131r. Nadir toprak eklenmesi w-co-ti ala\u015f\u0131m\u0131n\u0131n \u00f6zelliklerini geli\u015ftirebilir, \u00f6zellikle Shejin'in darbe direncini geli\u015ftirebilir. Ayn\u0131 zamanda, nadir toprak, (Ti, w) C kat\u0131 \u00e7\u00f6zeltisinin tane birikmesini ve b\u00fcy\u00fcmesini engelleyebilir ve tah\u0131l\u0131 rafine edebilir. WC Ni ala\u015f\u0131m\u0131na nadir toprak oksit eklendi\u011finde, nadir toprak oksidin dispersiyon g\u00fc\u00e7lenmesine ba\u011fl\u0131 olarak Ni ba\u011flama faz\u0131n\u0131n g\u00fcc\u00fc artar. Nadir toprak i\u00e7eri\u011fi 1.2% ~ 1.6% ba\u011flanma metal i\u00e7eri\u011fi oldu\u011funda, ala\u015f\u0131m\u0131n e\u011filme mukavemeti maksimum de\u011fere ula\u015f\u0131r (CeO2 eklendi\u011finde 1680mpa, Y2O3 eklendi\u011finde 1900mpa). WC-8% Co ala\u015f\u0131m\u0131n\u0131n b\u00fck\u00fclme mukavemeti, kar\u0131\u015f\u0131k nadir toprak oksit 0.25% ~ 1.00% ilave edilerek belli bir dereceye kadar artt\u0131r\u0131l\u0131r ve nadir toprak oksit 0.25% ~ 0.50% ilave edildi\u011finde 11.5% artt\u0131r\u0131labilir, ancak nadir toprak topra\u011f\u0131n\u0131n a\u015f\u0131r\u0131 eklenmesi, e\u011filme mukavemetinin azalmas\u0131na yol a\u00e7acakt\u0131r. Bu nedenle, \u00e7imentolu karb\u00fcr\u00fcn nadir toprak elementleri ile e\u011filme mukavemeti b\u00fcy\u00fck \u00f6l\u00e7\u00fcde geli\u015ftirilebilir.<\/p>\n\n\n\n

Cu & Mo metal inhibit\u00f6rleri<\/strong><\/strong><\/h3>\n\n\n\n

Semente karb\u00fcre az miktarda bak\u0131r eklemek, sadece ala\u015f\u0131m\u0131n mukavemetini artt\u0131rmakla kalmaz, ayn\u0131 zamanda ala\u015f\u0131m\u0131n darbe dayan\u0131kl\u0131l\u0131\u011f\u0131n\u0131 da geli\u015ftirir.<\/p>\n\n\n\n

WC-13% Fe \/ Co \/ Ni'ye az miktarda bak\u0131r eklendi\u011finde, ala\u015f\u0131m\u0131n sertli\u011fi azal\u0131rken, b\u00fck\u00fclme mukavemeti b\u00fcy\u00fck \u00f6l\u00e7\u00fcde artar. Bak\u0131r miktar\u0131 yakla\u015f\u0131k 0.8% oldu\u011funda, ala\u015f\u0131m\u0131n e\u011filme mukavemeti ve sertli\u011fi s\u0131ras\u0131yla 2370 MPa ve hra84.4't\u00fcr. A\u015fa\u011f\u0131daki Tablo 3'e bak\u0131n. WC Co'ya Mo eklendi\u011finde, Mo katk\u0131s\u0131n\u0131n art\u0131\u015f\u0131 ile b\u00fck\u00fclme mukavemeti ve Hindistan artm\u0131\u015ft\u0131r. Mo katk\u0131s\u0131 5% oldu\u011funda b\u00fck\u00fclme mukavemeti maksimum de\u011fere ula\u015fm\u0131\u015f ve Mo katk\u0131s\u0131 7.5% oldu\u011funda 19.25 gpa pik de\u011ferine ula\u015fm\u0131\u015ft\u0131r. Bununla birlikte, Mo miktar\u0131 5%'den fazla oldu\u011funda, b\u00fck\u00fclme mukavemeti kademeli olarak azal\u0131r, bu da intermetalik bile\u015fik CO'nun varl\u0131\u011f\u0131ndan kaynaklanan numunenin k\u0131r\u0131lganl\u0131\u011f\u0131ndan kaynaklan\u0131r.3<\/sub>(Mo, w)3<\/sub>C.<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

When WC grains in cemented carbide are less than 0.5 \u03bc m, the finer the grains are, the fewer the defects are, and the higher the bending strength and hardness are The particle size of WC powder used to produce ultrafine cemented carbide is much smaller than that of WC powder used in general cemented…<\/p>","protected":false},"author":2,"featured_media":19477,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/11\/1-2.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/18365"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/comments?post=18365"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/18365\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media\/19477"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media?parent=18365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/categories?post=18365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/tags?post=18365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}