Cemented Carbide Sintered Cov Khoom Siv Khoom Siv thiab Kev Tshawb Fawb Txog Kev Tshawb Fawb

Cemented carbide yog hmoov metallurgy khoom sintered nyob rau hauv lub tshuab nqus tsev vacuum los yog ib tug hydrogen txo cubalt nrog cobalt, npib tsib xee, thiab molybdenum raws li lub ntsiab feem ntawm tungsten carbide micron-sized hmoov ntawm high-hardness refractory hlau.Sintering yog ib qho tseem ceeb heev hauv cov cemented carbide.Lub thiaj li hu ua sintering yog kom sov cov hmoov compact mus rau ib tug tej yam kub thiab txias, khaws cia rau ib tug tej lub sij hawm ntawm lub sij hawm, thiab ces txias nws mus kom tau ib tug khoom uas yuav tsum tau cov khoom.Cov txheej txheem sintering ntawm cemented carbide yog qhov nyuaj heev, thiab nws yooj yim los tsim cov khib nyiab sintered yog tias koj tsis ceev faj.Niaj hnub no, Chuangrui Xiaobian yuav qhia rau koj txog cov sintered khib nyiab thiab cov laj thawj.

1. Carbide sintered pov tseg yog thawj zaug tev
Qhov ntawd yog hais tias, qhov saum npoo ntawm cov cemented carbide dhau los ntawm cov kab nrib pleb ntawm cov npoo, warping shells los yog tawg, thiab nyob rau hauv cov xwm txheej hnyav, cov tawv nyias nyias zoo li ntses nplai, tawg tawg, thiab txawm pulverization.Lub tev yog tsuas yog los ntawm kev sib cuag ntawm cobalt nyob rau hauv lub compact, thiaj li hais tias cov pa roj carbon monoxide decomposes dawb carbon nyob rau hauv nws, ua rau ib tug txo nyob rau hauv lub zos lub zog ntawm lub compact, uas ua rau tev.

2. Qhov thib ob feem ntau cemented carbide sintered pov tseg yog qhov
Pores saum 40 microns hu ua pores.Yam uas tuaj yeem ua rau blistering tuaj yeem tsim pores.Tsis tas li ntawd, thaum muaj impurities nyob rau hauv lub cev sintered uas tsis wetted los ntawm cov hlau molten, xws li loj pores xws li "unpressed", los yog lub cev sintered muaj ib tug loj cov khoom theem thiab cov segregation ntawm cov kua theem yuav tsim pores.

3. Qhov thib peb feem ntau cemented carbide sintered khib nyiab khoom yog blister
Muaj qhov nyob hauv cov khoom siv cemented carbide alloy, thiab convex curved nto tshwm nyob rau saum npoo ntawm cov khoom sib thooj.Qhov tshwm sim no hu ua blistering.Lub ntsiab yog vim li cas rau blistering yog hais tias lub cev sintered muaj kuj concentrated gas.Feem ntau muaj ob hom: ib qho yog tias huab cua nkag mus rau hauv lub cev sintered, thiab thaum lub sij hawm sintering shrinkage txheej txheem, huab cua txav los ntawm sab hauv mus rau saum npoo.Yog hais tias muaj impurities ntawm ib tug me me nyob rau hauv lub sintered lub cev, xws li alloy scraps, hlau scraps, thiab cobalt scraps, huab cua yuav mloog zoo ntawm no.Tom qab lub cev sintered tshwm nyob rau hauv cov kua theem thiab yog densified, huab cua tsis tau tawm.Blisters tsim rau ntawm qhov chaw me tshaj plaws.

Qhov thib ob yog tias muaj tshuaj lom neeg cov tshuaj tiv thaiv uas tsim cov roj ntau hauv lub cev sintered.Thaum muaj qee cov oxides hauv lub cev sintered, lawv raug txo qis tom qab cov kua theem tshwm sim los tsim cov roj, uas yuav ua rau cov khoom npuas;WC-CO alloys feem ntau yog tsim los ntawm agglomeration ntawm oxides hauv kev sib tov.

4. Tseem muaj lub koom haum tsis sib xws: sib xyaw

5, thiab tom qab ntawd muaj deformation
Kev hloov pauv tsis tu ncua ntawm lub cev sintered yog hu ua deformation.Lub ntsiab yog vim li cas rau lub deformation yog raws li nram no: qhov ceev tis ntawm lub compacts yog tsis sib xws, vim hais tias qhov ceev ntawm cov tiav alloy yog tib yam;lub cev sintered yog qhov tsis muaj cov pa roj carbon ntau hauv zos, vim tias tsis muaj cov pa roj carbon monoxide txo cov kua theem kuj;lub nkoj thauj khoom tsis tsim nyog;lub phaj thaub qab tsis sib xws.