Ob Txoj Kev Sintering

tungsten carbide cov khoom yog cov khoom sib xyaw ntawm tungsten carbide thiab lwm cov pab pawg hlau xws li cobalt ua cov ntawv khi. Cov khoom siv tungsten carbide tuaj yeem siv dav hauv kev txiav cov hlau, roj laum khoom, thiab hlau ua tuag.

Tungsten carbide sintering yuav tsum tau ua tib zoo tswj kom tau qhov zoo tagnrho microstructure thiab tshuaj muaj pes tsawg leeg. Hauv ntau daim ntawv thov, tungsten carbide yog tsim los ntawm hmoov metallurgy, uas suav nrog sintering. Cov khoom siv tungsten carbide feem ntau tiv taus hnav thiab tensile nyob rau hauv ib puag ncig hnyav. Hauv feem ntau cov ntawv txiav hlau, tungsten carbide cutters nrog hnav tshaj 0.2-0.4 hli raug txiav txim kom muab pov tseg. Yog li, cov khoom ntawm tungsten carbide yog qhov tseem ceeb.

Muaj ob txoj hauv kev tseem ceeb rau sinter tungsten carbide khoom. Ib qho yog hydrogen sintering, thiab lwm qhov yog nqus sintering. Hydrogen sintering yog tswj cov muaj pes tsawg leeg ntawm qhov chaw los ntawm theem tshuaj tiv thaiv kinetics hauv hydrogen thiab siab; Lub tshuab nqus tsev sintering yog tswj xyuas qhov sib xyaw ntawm tungsten carbide los ntawm kev ua kom cov tshuaj tiv thaiv kinetics nyob rau hauv lub tshuab nqus tsev lossis ib puag ncig huab cua.

Nqus sintering muaj ntau yam kev siv hauv kev lag luam. Qee zaum, cov neeg ua haujlwm tuaj yeem siv cov isostatic pressing, uas tseem ceeb heev rau kev tsim cov khoom tungsten carbide.

Thaum lub sij hawm hydrogen sintering, hydrogen yog qhov txo qhov cua. Hydrogen yuav hnov ​​​​mob nrog cov phab ntsa sintering rauv lossis graphite thiab hloov lwm yam khoom.

Piv nrog hydrogen sintering, lub tshuab nqus tsev sintering muaj qhov zoo hauv qab no.

Ua ntej tshaj plaws, lub tshuab nqus tsev sintering tuaj yeem tswj cov khoom muaj pes tsawg leeg zoo heev. Nyob rau hauv lub siab ntawm 1.3 ~ 133pa, qhov sib pauv ntawm cov pa roj carbon thiab oxygen ntawm cov cua thiab cov hlau yog tsawg heev. Lub ntsiab tseem ceeb cuam tshuam rau qhov muaj pes tsawg leeg yog cov ntsiab lus ntawm cov pa oxygen hauv cov khoom carbide, yog li lub tshuab nqus tsev sintering muaj qhov zoo dua hauv kev tsim khoom ntawm sintered tungsten carbide.

Thib ob, thaum lub tshuab nqus tsev sintering, nws hloov tau yooj yim dua los tswj cov txheej txheem sintering, tshwj xeeb tshaj yog cov cua sov, kom tau raws li qhov xav tau ntawm ntau lawm. Nqus sintering yog ib qho kev ua haujlwm batch, uas yog hloov tau ntau dua li hydrogen sintering.

Thaum sintering tungsten carbide cov khoom, tungsten carbide yuav tsum tau ntsib cov theem hauv qab no:

1. Tshem tawm ntawm tus neeg sawv cev molding thiab pre-burning theem;

Hauv cov txheej txheem no, qhov kub thiab txias yuav tsum tau nce ntxiv, thiab theem no tshwm sim hauv qab 1800 ℃.

2. Khoom-theem sintering theem

Raws li qhov kub thiab txias yog maj mam nce, lub sintering txuas ntxiv. Cov theem no tshwm sim ntawm 1800 ℃ thiab eutectic kub.

3. Kua theem sintering theem

Nyob rau theem no, qhov kub thiab txias tseem nce mus txog qhov kub siab tshaj plaws hauv cov txheej txheem sintering, qhov kub ntawm sintering.

4. Cua txias theem

Cov cemented carbide, tom qab sintering, tuaj yeem raug tshem tawm ntawm lub qhov cub sintering thiab txias rau chav tsev kub.

Yog tias koj txaus siab rau cov khoom lag luam tungsten carbide thiab xav paub ntau ntxiv thiab cov ntsiab lus, koj tuaj yeem tiv tauj peb hauv xov tooj lossis xa ntawv ntawm sab laug, lossis xa US MAIL hauv qab ntawm nplooj ntawv.