Tungsten carbide kuwotcha kumbuyo

Kuwotcha kumbuyo kumatanthawuza njira yobwereranso yopindika zinthu zopunduka, zolowetsedwa, zopangidwa ndi decarburized ndizinthu za tungsten carbidendi pores kwambiri.(1) Kuwotcha mmbuyo kwa zinthu zomwe zidalowetsedwa komanso zowonongeka.Carburizing ndi kumbuyo-kuwotcha nthawi zambiri ntchito mkulu-kutentha calcined graphite particles kapena osakaniza graphite particles ndi Al2O3 ufa monga sing'anga, ndi kuchita mmbuyo-kuwotcha pansi chitetezo haidrojeni.
Decarburization ndi backburning zambiri ntchito Al203 ufa calcined pa kutentha kwambiri kapena osakaniza Al203 ufa ndi zabwino W ufa monga sing'anga, ndi backburning ikuchitika pansi pa chitetezo haidrojeni.
(2) Porosity imaposa muyezo ndikuwotcha mmbuyo.Ngati porosity ya tsungani carbidemankhwala sintered (pores osati zazikulu kuposa 25 μm) kuposa muyezo, ndi ng'anjo kuthamanga sintering angagwiritsidwe ntchito kuthamanga sintering pa kuthamanga pafupifupi 10MPa.Kutentha kwa sintering kuyenera kukhala pafupifupi 20 ° C kutsika kuposa kutentha koyambirira kwa chinthucho.Kukonza pazovuta zapamwamba pogwiritsa ntchito kukanikiza kotentha kwa isostatic ndikothandiza kwambiri.
(3) Kuwongola.Backburning ikuchitika pogwiritsa ntchito kukakamiza ndi kugwiritsa ntchito haidrojeni chitetezo kapena vacuum boma pa kutentha pang`ono kuposa kutentha eutectic.Kulemera kokakamiza kumatha kusinthidwa kapena kutentha kowongolera kungawonjezeke molingana ndi kuwongolera kwa chinthucho, koma kutentha kowongolera sikuyenera kukhala kwakukulu kuposa kutentha koyambirira kwa sintering.