Farashin PDC

Bban mamaki

An yi amfani da ƙaƙƙarfan lu'u-lu'u na polycrystalline (PDC) a aikace-aikacen masana'antu, gami da aikace-aikacen hako dutse da aikace-aikacen injin ƙarfe. Irin waɗannan ƙaƙƙarfan sun nuna fa'idodi akan wasu nau'ikan abubuwan yanke, kamar mafi kyawun juriya da juriya mai tasiri. Ana iya samar da PDC ta hanyar haɗa nau'ikan lu'u-lu'u guda ɗaya tare a ƙarƙashin matsanancin matsin lamba da yanayin zafi mai girma (HPHT), a gaban mai kara kuzari / kauri wanda ke haɓaka haɗin lu'u-lu'u. Wasu misalan masu haɓakawa/masu kaushi don ƙaƙƙarfan lu'u-lu'u masu haɗaka sune cobalt, nickel, iron, da sauran ƙarfe na rukuni na VIII. PDCs yawanci suna da abun ciki na lu'u-lu'u fiye da kashi saba'in bisa ɗari, tare da kusan kashi tamanin zuwa kusan kashi casa'in da takwas bisa ɗari. An haɗa PDC zuwa wani abu, ta haka ne ke samar da abin yankan PDC, wanda yawanci ana iya sakawa a ciki, ko kuma an saka shi zuwa, kayan aiki na ƙasa kamar rami mai rami ko reamer.

Farashin PDC

Ana yin masu yankan PDC ta hanyar tungsten carbide substrate da lu'u-lu'u foda a ƙarƙashin babban zafin jiki da matsa lamba. Cobalt shine mai ɗaure. Tsarin leaching da sinadarai yana kawar da mai kara kuzari wanda ya haɗa da tsarin polycrystalline. Sakamakon shine tebur na lu'u-lu'u tare da ingantaccen juriya ga lalatawar thermal da lalacewa mai lalacewa, yana haifar da rayuwa mai amfani mai tsayi.. Ana gama wannan tsari a cikin fiye da sa'o'i 10 a ƙarƙashin digiri 500 zuwa 600 ta tanderun injin daskarewa. Manufar leached shine don haɓaka taurin PDC. A al'ada kawai filin mai PDC ya ɗauki wannan fasaha, saboda yanayin aiki na rijiyar mai ya fi rikitarwa.

TaƙaiceTarihi

A cikin 1980s, Kamfanin GE (Amurka) da Sumitomo Company (Japan) sun yi nazarin cire cobalt daga saman aiki na haƙoran PDC don inganta aikin haƙoran. Amma ba su sami nasarar kasuwanci ba. Daga baya an sake haɓaka wata fasaha kuma Hycalog ta sami haƙƙin mallaka（Amurka）. An tabbatar da cewa idan za a iya cire kayan ƙarfe daga ratar hatsi, za a inganta kwanciyar hankali na zafi na haƙoran PDC ta yadda bit zai iya yin rawar jiki mafi kyau a cikin nau'i mai wuyar gaske. Wannan fasaha na kawar da cobalt yana inganta juriyar lalacewa na haƙoran PDC a cikin sifofin dutse masu ƙaƙƙarfan ƙazanta kuma yana ƙara faɗaɗa kewayon aikace-aikacen rago PDC.