Tungsten carbide hlawv rov qab

Back-burning yog hais txog txoj kev rov sintering rau khoov deformed khoom, infiltrated, decarburized khoom thiabtungsten carbide khoomnrog ntau pores.(1) Backburning ntawm infiltrated thiab decarburized khoom.Carburizing thiab rov qab hlawv feem ntau yog siv high-temperature calcined graphite hais los yog ib tug sib tov ntawm graphite hais thiab Al2O3 hmoov raws li qhov nruab nrab, thiab nqa tawm rov qab-kub nyob rau hauv hydrogen tiv thaiv.
Decarburization thiab backburning feem ntau yog siv Al203 hmoov calcined ntawm qhov kub thiab txias los yog sib tov ntawm Al203 hmoov thiab nplua W hmoov raws li qhov nruab nrab, thiab backburning yog ua raws li hydrogen tiv thaiv.
(2) Lub porosity tshaj tus qauv thiab hlawv rov qab.Yog hais tias lub porosity ntawm tungsten carbidesintered khoom (pores tsis loj dua 25 μm) tshaj tus qauv, lub siab sintering rauv yuav siv tau rau siab sintering ntawm ib tug siab ntawm txog 10MPa.Qhov kub sintering yuav tsum yog li 20 ° C qis dua qhov pib sintering kub ntawm cov khoom.Kev ua haujlwm ntawm kev kub siab dua siv kub isostatic nias yog qhov zoo dua.
(3) Ncaj ncaj.Backburning yog ua los ntawm kev siv lub siab thiab siv kev tiv thaiv hydrogen lossis lub tshuab nqus tsev ntawm qhov kub thiab txias me ntsis siab dua qhov kub ntawm eutectic.Qhov hnyav hnyav tuaj yeem hloov kho lossis kho qhov kub thiab txias tuaj yeem nce ntxiv raws li kev kho cov khoom, tab sis qhov kev kho qhov kub yuav tsum tsis txhob siab tshaj qhov pib sintering kub ntawm cov khoom.