Cov txheej txheem ntawm sintering tungsten carbide

Raws li peb txhua tus paub, tungsten carbide yog ib qho ntawm cov khoom siv nyuaj tshaj plaws hauv kev lag luam niaj hnub. Txhawm rau ua cov tungsten carbide ntau lawm, nws yuav tsum muaj ntau yam txheej txheem kev lag luam, xws li hmoov sib tov, ntub milling, tshuaj tsuag kom qhuav, nias, sintering, thiab xyuas kom zoo. Thaum lub sij hawm sintering, lub ntim ntawm cov cemented carbide yuav shrink los ntawm ib nrab. Kab lus no yog los txiav txim seb muaj dab tsi tshwm sim rau tungsten carbide thaum sintering.

Thaum lub sij hawm sintering, muaj plaub theem uas tungsten carbide yuav tsum muaj. Lawv yog:

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

2. Khoom-theem sintering theem;

3. Ua kua-theem sintering theem;

4. Lub caij txias.

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 ℃. Raws li qhov kub thiab txias, cov dej noo, roj, thiab cov kuab tshuaj residual nyob rau hauv pressed tungsten carbide maj mam evaporate. Tus neeg sawv cev molding yuav nce cov ntsiab lus ntawm cov sintering cemented carbide. Hauv kev sib txawv sintering, qhov nce ntawm cov ntsiab lus carbide sib txawv. Kev sib cuag kev ntxhov siab ntawm cov hmoov hmoov kuj maj mam tshem tawm thaum lub sij hawm nce hauv qhov kub thiab txias.

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. Qhov hu ua eutectic kub yog hais txog qhov ntsuas kub qis tshaj plaws uas cov kua muaj nyob hauv qhov system no. Cov theem no yuav txuas ntxiv raws li theem kawg. Cov yas ntws nce thiab lub cev sintered shrinks ho. Lub sijhawm no, qhov ntim ntawm tungsten carbide shrinks obviously.

3. Kua theem sintering theem

Nyob rau theem no, qhov kub nce mus txog thaum nws nce mus txog qhov kub siab tshaj plaws hauv cov txheej txheem sintering, qhov kub ntawm sintering. Thaum cov kua theem tshwm rau ntawm tungsten carbide, shrinkage tiav sai. Vim yog qhov nro ntawm cov kua theem, cov hmoov hmoov mus rau ib leeg, thiab cov pores hauv cov khoom yog maj mam ntim nrog cov kua theem.

4. Lub caij txias

Tom qab sintering, cov cemented carbide tuaj yeem raug tshem tawm ntawm lub qhov cub sintering thiab txias rau chav tsev kub. Qee lub tsev lag luam yuav siv cov khib nyiab pov tseg hauv qhov cub sintering rau kev siv thermal tshiab. Nyob rau ntawm no, raws li qhov kub thiab txias, qhov kawg microstructure ntawm cov hlau yog tsim.

Sintering yog txheej txheem nruj heev, thiab zzbetter tuaj yeem muab koj cov khoom zoo tungsten carbide. 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 mus rau US MAIL hauv qab ntawm nplooj ntawv.