{"id":13906,"date":"2020-03-06T06:44:00","date_gmt":"2020-03-06T06:44:00","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=13906"},"modified":"2020-05-07T00:41:18","modified_gmt":"2020-05-07T00:41:18","slug":"new-breakthrough-of-tungsten-carbide-with-superior-properties-of-the-beijing-university","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/tr\/new-breakthrough-of-tungsten-carbide-with-superior-properties-of-the-beijing-university\/","title":{"rendered":"Pekin \u00dcniversitesi'nin \u00dcst\u00fcn \u00d6zellikleri ile Tungsten Karb\u00fcr\u00fcn Yeni At\u0131l\u0131m\u0131"},"content":{"rendered":"
\n

Y\u00fcksek sertli\u011fi ve a\u015f\u0131nma direnci nedeniyle, <\/strong>tungsten karb\u00fcr <\/strong> "end\u00fcstriyel di\u015fler" olarak bilinen \u00e7e\u015fitli i\u015fleme arac\u0131 malzemeleri olarak yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Bunlar aras\u0131nda WC Co <\/strong>tungsten karb\u00fcr <\/strong> en b\u00fcy\u00fck \u00fcretim ve t\u00fcketim <\/strong>tungsten karb\u00fcr <\/strong> malzemeler. Onlarca y\u0131ll\u0131k geli\u015fimden sonra, m\u00fchendislik uygulamas\u0131nda <\/strong>tungsten karb\u00fcr <\/strong>, sertlik ve a\u015f\u0131nma direnci temel olarak servis performans\u0131n\u0131n gerekliliklerini kar\u015f\u0131layabilirken, k\u0131r\u0131lma mukavemeti ve darbe toklu\u011fu, uygulaman\u0131n geni\u015flemesinin darbo\u011faz\u0131d\u0131r. <\/strong>tungsten karb\u00fcr <\/strong>, \u00f6zellikle \u00fcst d\u00fczey uygulama. Uzun zamand\u0131r, g\u00fc\u00e7lendirme ve sertle\u015ftirme mekanizmas\u0131 hakk\u0131nda sistematik bir anlay\u0131\u015f eksikli\u011fi var. <\/strong>tungsten karb\u00fcr <\/strong>, bir \u00e7e\u015fit metal seramik \u00e7ift fazl\u0131 kompozit ve katk\u0131 maddeli \u00e7ok fazl\u0131 kompozit malzemedir. Bu t\u00fcr malzeme sisteminin \u00e7ok bile\u015fenli, yap\u0131, mekanik davran\u0131\u015f ve kapsaml\u0131 performans aras\u0131ndaki ili\u015fkinin daha fazla ara\u015ft\u0131r\u0131lmas\u0131 gerekmektedir.<\/strong><\/strong><\/p>\n\n\n\n

1.bilimsel prob<\/strong>ems<\/h2>\n\n\n\n

\u015eu anda, ortak temel ara\u015ft\u0131rma bilimsel sorunlar\u0131 alan\u0131nda <\/strong>tungsten karb\u00fcr <\/strong> m\u00fchendislik uygulamas\u0131ndan a\u015fa\u011f\u0131daki gibi \u00f6zetlenebilir:<\/strong><\/strong><\/p>\n\n\n\n

ultra ince ve nanokristalin end\u00fcstriyel haz\u0131rlanmas\u0131nda <\/strong>tungsten karb\u00fcr <\/strong>, tane b\u00fcy\u00fcmesi, tane b\u00fcy\u00fcme inhibit\u00f6rleri eklenerek kontrol edilmelidir. Bununla birlikte, inhibit\u00f6rlerin genellikle sertli\u011fi ve mukavemeti \u00fczerinde olumsuz etkileri vard\u0131r. <\/strong>tungsten karb\u00fcr <\/strong>. \u0130nhibit\u00f6r t\u00fcrevli mikroyap\u0131n\u0131n kararl\u0131l\u0131k kontrol fakt\u00f6rlerini ve mikroyap\u0131 ve mekanik \u00f6zellikler \u00fczerindeki etkilerini tam olarak anlamak gerekir. <\/strong>tungsten karb\u00fcr <\/strong>.<\/strong><\/strong><\/p>\n\n\n\n

Sert faz\u0131n tane boyutunun mikron alt\u0131 \u00f6l\u00e7e\u011fin alt\u0131na d\u00fc\u015fmesiyle, i\u00e7 aray\u00fcz yava\u015f yava\u015f sertli\u011fin ve mukavemeti etkileyen ana fakt\u00f6r haline gelir. <\/strong>tungsten karb\u00fcr <\/strong>. Bununla birlikte, WC \/ CO ve WC \/ WC s\u0131n\u0131rlar\u0131n\u0131 stabilize edebilen fakt\u00f6rler ve stabilizasyon mekanizmas\u0131 iyi anla\u015f\u0131lmam\u0131\u015ft\u0131r ve d\u00fc\u015f\u00fck enerjili aray\u00fcz\u00fcn olu\u015fumu ve evrim mekanizmas\u0131 iyi anla\u015f\u0131lmam\u0131\u015ft\u0131r.<\/strong><\/strong><\/p>\n\n\n\n

Mekanik davran\u0131\u015f ve mikro mekanizman\u0131n incelenmesi ile <\/strong>tungsten karb\u00fcr <\/strong> oda s\u0131cakl\u0131\u011f\u0131nda ve y\u00fcksek s\u0131cakl\u0131kta, y\u00fcksek performansl\u0131 tasar\u0131m ve haz\u0131rlanmaya rehberlik etmek i\u00e7in hizmet s\u00fcrecinde g\u00fc\u00e7lendirme ve sertle\u015ftirme mekanizmas\u0131n\u0131n anla\u015f\u0131lmas\u0131 derinle\u015ftirilebilir. <\/strong>tungsten karb\u00fcr <\/strong>. \u015eu anda, mikro deformasyon mekanizmas\u0131, plastisite kayna\u011f\u0131 ve y\u00fcksek s\u0131cakl\u0131k mekanik davran\u0131\u015f\u0131 hakk\u0131nda sistematik bir anlay\u0131\u015f yoktur. <\/strong>tungsten karb\u00fcr <\/strong>.<\/strong><\/strong><\/p>\n\n\n\n

2.Ara\u015ft\u0131rma ilerlemesi<\/strong><\/h2>\n\n\n\n

Profes\u00f6r Song Xiaoyan'\u0131n Pekin \u00dcniversitesi teknoloji ekibi, m\u00fchendislik uygulamas\u0131ndaki pratik sorunlar hakk\u0131nda bir dizi temel ara\u015ft\u0131rma ger\u00e7ekle\u015ftirdi. <\/strong>tungsten karb\u00fcr <\/strong>. 2013 y\u0131l\u0131nda ara\u015ft\u0131rma ekibi ilk olarak nanokristalini haz\u0131rlad\u0131 <\/strong>tungsten karb\u00fcr <\/strong> hem y\u00fcksek sertlik hem de y\u00fcksek toklu\u011fa sahip y\u00fcksek yo\u011funluklu ve d\u00fczg\u00fcn yap\u0131ya sahip blok malzemeleri ve nanokristalin iki fazl\u0131 aray\u00fcz uyumlu tutarl\u0131 sertle\u015ftirme teorisini \u00f6ne s\u00fcrd\u00fc <\/strong>tungsten karb\u00fcr <\/strong> (ACTA mater. 2013, 61, 2154-2162), yerinde mekanik deneylerde tam olarak do\u011frulanm\u0131\u015ft\u0131r (mater. Res. Lett. 2017, 5, 55-60). Son zamanlarda, teorik modelleme ve deneysel tasar\u0131m\u0131 birle\u015ftiren ara\u015ft\u0131rma grubu, ortaya \u00e7\u0131kabilecek \u00e7e\u015fitli \u201caray\u00fcz yap\u0131lar\u0131\u201d \u00fczerinde derinlemesine \u00e7al\u0131\u015fm\u0131\u015ft\u0131r. <\/strong>tungsten karb\u00fcr <\/strong> ve 2-6 atomik tabaka kal\u0131nl\u0131\u011f\u0131na sahip \u00e7e\u015fitli t\u00fcrde aray\u00fcz yap\u0131lar\u0131, etkileyen fakt\u00f6rler, stabilizasyon yakla\u015f\u0131mlar\u0131 ve mikro mekanizmalar bulunmu\u015ftur. Katk\u0131 maddelerinin optimizasyonuna ve kompozisyonun ince ayar\u0131na dayanarak, aray\u00fcz yap\u0131s\u0131n\u0131n kararl\u0131l\u0131\u011f\u0131n\u0131n do\u011fru kontrol\u00fc ger\u00e7ekle\u015ftirilir. Faz aray\u00fcz\u00fc e\u015fleme malzemelerinin V, Cr, Ti, Ta ve Nb gibi \u00e7e\u015fitli elementlerle anti-tanecikler aras\u0131 k\u0131r\u0131lma mekanizmas\u0131 \u00f6nerilmektedir. Ayr\u0131ca, aray\u00fcz yap\u0131s\u0131 stabilitesi ve y\u00fczey enerjisi anizotropisinin, d\u00fc\u015f\u00fck enerji s\u0131n\u0131rlar\u0131nda \u2211 2 ve \u2211 13A olu\u015fumu ve geli\u015fimi \u00fczerindeki etkisi, tane b\u00fcy\u00fcmesi inhibit\u00f6rlerinin optimize edilmesi ve Sinterleme Yo\u011funla\u015ft\u0131rma s\u0131cakl\u0131\u011f\u0131n\u0131n kontrol edilmesiyle elde edilmi\u015ftir. B\u00f6ylece, WC \/ CO uyumlu faz s\u0131n\u0131r\u0131n\u0131n WC \/ WC d\u00fc\u015f\u00fck enerjili tane s\u0131n\u0131r\u0131 da\u011f\u0131l\u0131m\u0131na oran\u0131n\u0131 artt\u0131rmak i\u00e7in kontrol edilebilir haz\u0131rl\u0131k problemi <\/strong>tungsten karb\u00fcr <\/strong> \u00c7\u00f6z\u00fcld\u00fc. \u0130lgili ba\u015far\u0131lar art arda Acta mater'de yay\u0131nland\u0131. 2018, 149, 164-178 ve Acta mater. 2019, 175, 171-181 \u201cWC Co. <\/strong>tungsten karb\u00fcr <\/strong>WC Co'da s \u201dve\u201c d\u00fc\u015f\u00fck enerjili tane s\u0131n\u0131rlar\u0131 <\/strong>tungsten karb\u00fcr <\/strong>ler\u201d. Temel ara\u015ft\u0131rma rehberli\u011finde ara\u015ft\u0131rma grubu ve i\u015fletme, ultra y\u00fcksek mukavemet ve y\u00fcksek tokluk haz\u0131rlamak i\u00e7in i\u015fbirli\u011fi yapt\u0131 <\/strong>tungsten karb\u00fcr <\/strong> ortalama enine k\u0131r\u0131lma mukavemeti 5200mpa'dan fazla ve k\u0131r\u0131lma toklu\u011fu 13.0mpa'dan fazla olan \u00e7ubuklar \u00b7 M1 \/ 2 K\u0131r\u0131lma mukavemeti de\u011feri, benzerleri aras\u0131nda k\u0131r\u0131lma mukavemetinin en y\u00fcksek performans endeksidir. <\/strong>tungsten karb\u00fcr <\/strong> d\u00fcnyada rapor.<\/strong><\/strong><\/p>\n\n\n\n

Buna ek olarak, ara\u015ft\u0131rma grubu tungsten karb\u00fcr\u00fcn mikroyap\u0131s\u0131, mekanik davran\u0131\u015f\u0131 ve kapsaml\u0131 \u00f6zellikleri aras\u0131ndaki ili\u015fki \u00fczerine bir\u00e7ok ara\u015ft\u0131rma yapm\u0131\u015ft\u0131r. Deney a\u00e7\u0131s\u0131ndan, tungsten karb\u00fcr\u00fcn harici y\u00fckleme alt\u0131nda, \u00f6zellikle \u00e7\u0131k\u0131k ve istifleme hatas\u0131 hareket yasas\u0131 alt\u0131nda mikroyap\u0131 geli\u015fimi, yerinde mekanik deney yoluyla ger\u00e7ekle\u015ftirilmi\u015ftir. <\/strong><\/p>\n\n\n\n

\u0130nce yap\u0131 karakterizasyonu ve kristalografi analizi sayesinde, sert faz ve s\u00fcnek faz\u0131n kristal kusurlar\u0131n\u0131n y\u00fcksek mukavemet ve tokluktaki tungsten karb\u00fcrdeki etkile\u015fim mekanizmas\u0131 \u00f6nerildi ve \u00e7atlak \u00e7ekirdeklenmesinin geciktirilmesi ve \u00e7atlak b\u00fcy\u00fcmesine direnme mekanizmas\u0131 ortaya \u00e7\u0131kt\u0131. \u00d6zellikle, tungsten karb\u00fcr\u00fcn gerilme davran\u0131\u015f\u0131 g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda, WC faz\u0131n\u0131n ana kayma sisteminin, oda s\u0131cakl\u0131\u011f\u0131nda s\u0131k\u0131\u015ft\u0131rma \u00e7ubu\u011funun \u00e7\u0131kmas\u0131na neden olabilece\u011fi, y\u00fcksek s\u0131cakl\u0131kta yeni kayma sisteminin aktivasyonunun, niceliksel olarak plastik katk\u0131 sa\u011flayabilece\u011fi \u00f6nerilmektedir. tungsten karb\u00fcr\u00fcn plastik su\u015fu ile kayma sisteminin hareketi ve yerinden \u00e7\u0131kmas\u0131 ile s\u0131cakl\u0131k ile de\u011fi\u015fim kural\u0131 aras\u0131ndaki ili\u015fkiyi ortaya koymaktad\u0131r. Sim\u00fclasyon hesaplamas\u0131 a\u00e7\u0131s\u0131ndan, bikristal ve polikristal tungsten karb\u00fcr\u00fcn oda s\u0131cakl\u0131\u011f\u0131nda ve y\u00fcksek s\u0131cakl\u0131ktaki mekanik davran\u0131\u015f\u0131 molek\u00fcler dinamik y\u00f6ntem ve tane s\u0131n\u0131r\u0131, faz s\u0131n\u0131r\u0131, tanecik i\u00e7i kusur ve tane b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn mikro mekanizma \u00fczerindeki etkisi tungsten karb\u00fcr\u00fcn deformasyonu ve k\u0131r\u0131lma davran\u0131\u015f\u0131 atomik \u00f6l\u00e7ekte a\u00e7\u0131kl\u0131\u011fa kavu\u015fturuldu. Elektronik \u00f6l\u00e7ekte, durumun elektronik yo\u011funlu\u011fu ve WC'nin ba\u011flanma \u015fekli ilk prensip ile hesaplan\u0131r ve analiz edilir ve WC'nin y\u00fcksek sertlikteki mikro mekanizmas\u0131 a\u00e7\u0131kl\u0131\u011fa kavu\u015fturulur.<\/strong><\/p>\n\n\n\n

WC'nin elastik mod\u00fcl\u00fcn\u00fcn ve sertli\u011finin, y\u00fcksek \u00e7al\u0131\u015fma fonksiyonlu metal elemanlar\u0131n mikro kat\u0131 \u00e7\u00f6zeltisi ile daha da geli\u015ftirilebilece\u011fi ve daha sonra y\u00fcksek sertlik ve kat\u0131 \u00e7\u00f6zelti ba\u011flanmam\u0131\u015f faz WC d\u00f6kme malzemesinin deneyde ba\u015far\u0131yla sentezlendi\u011fi \u00f6nerilmektedir. 2019 y\u0131l\u0131nda, yukar\u0131daki ara\u015ft\u0131rma ilerlemesi uluslararas\u0131 tan\u0131nm\u0131\u015f dergi kristali Journal: Acta crystal'da \u00fc\u00e7 ard\u0131\u015f\u0131k makalede yay\u0131nland\u0131. 2019, B75, 134-142 (ilk yazar y\u00fcksek lisans \u00f6\u011frencisi Fang Jing'dir); A\u00e7ta kristal. 2019, B75, 994-1002 (ilk yazar Dr. LV Hao); A\u00e7ta kristal. 2019, B75, 1014-1023 (ilk yazar Hu Huaxin, doktora \u00f6\u011frencisi). Mezo ve makro \u00f6l\u00e7ekte, tungsten karb\u00fcr\u00fcn ger\u00e7ek \u00fc\u00e7 boyutlu yap\u0131s\u0131na dayanan sonlu bir eleman modeli olu\u015fturulmu\u015ftur. Tungsten karb\u00fcr\u00fcn heterojen gerilme tepkisi ve plastik deformasyon davran\u0131\u015f\u0131, haz\u0131rland\u0131\u011f\u0131 gibi art\u0131k rezid\u00fcel stres ve yataklama i\u015fleminde d\u0131\u015f gerilim etkile\u015fimi alt\u0131nda incelenmi\u015ftir. Mikroyap\u0131 deformasyon davran\u0131\u015f\u0131 k\u0131r\u0131lma toklu\u011fu aras\u0131ndaki ili\u015fki ortaya \u00e7\u0131kar. Bu ba\u015far\u0131 int. J. plastisite, 2019, 121, 312-323 (ilk yazar Dr. Li Yanan'd\u0131r).<\/strong><\/p>\n\n\n\n

\u015eekil 1. VC ve Cr3C2 eklenerek olu\u015fturulan WC \/ CO faz s\u0131n\u0131r\u0131n\u0131n aray\u00fcz yap\u0131s\u0131 ve evrim \u00f6zellikleri<\/strong><\/strong><\/p>\n\n\n\n

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

\u015eekil 2. Tungsten karb\u00fcrde katk\u0131 maddelerinin, s\u0131cakl\u0131k ve y\u00fczey enerjisi anizotropisinin d\u00fc\u015f\u00fck enerjili tane s\u0131n\u0131rlar\u0131n\u0131n olu\u015fumu ve geli\u015fimi \u00fczerindeki etkisi <\/p>\n\n\n\n

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

\u015eekil 3. Nanokristal tungsten karb\u00fcrde WC tane rotasyonunun mikro plastik deformasyon \u00fczerindeki etkisi <\/p>\n\n\n\n

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

\u015eekil 4. Tekrar ba\u011flanmam\u0131\u015f fazl\u0131 yeni tip y\u00fcksek sertlikte WC blok malzemenin mikroyap\u0131s\u0131 ve mekanik \u00f6zellikleri<\/p>\n\n\n\n

  • \"\"<\/figure><\/li><\/ul><\/figure>\n\n\n\n

    \u015eekil 5. WC taban d\u00fczleminde ve silindir \u00fczerindeki ana kayma d\u00fczleminde tipik dislokasyon reaksiyonlar\u0131 (dislokasyon ayr\u0131\u015fmas\u0131, s\u0131k\u0131\u015ft\u0131rma \u00e7ubu\u011fu \u00e7\u0131k\u0131klar\u0131n\u0131n olu\u015fumu vb. Dahil)<\/p>\n\n\n\n

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

    \u015eekil 6. Homojen olmayan su\u015f yan\u0131t\u0131n\u0131n s\u0131k\u0131\u015ft\u0131rma s\u0131ras\u0131nda tungsten karb\u00fcr\u00fcn k\u0131r\u0131k davran\u0131\u015f\u0131 \u00fczerindeki etkisi<\/p>\n\n\n\n

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

    Due to its high hardness and wear resistance, tungsten carbide  is widely used as a variety of processing tool materials, known as “industrial teeth”. Among them, WC Co tungsten carbide  is the largest production and consumption of tungsten carbide  materials. After decades of development, in the engineering application of tungsten carbide , the hardness and…<\/p>","protected":false},"author":2,"featured_media":13907,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2020\/03\/\u56fe\u72471.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/13906"}],"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=13906"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/13906\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media\/13907"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media?parent=13906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/categories?post=13906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/tags?post=13906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}