Feem ntau cov teeb meem thiab ua rau tungsten Carbide Sintering

Sintering yog hais txog cov txheej txheem ntawm kev hloov cov hmoov av rau hauv cov hmoov av ntom ntom thiab yog ib theem tseem ceeb heev hauv cov txheej txheem tsim khoom ntawm cov khoom noj carbide. Cov txheej txheem tungsten carbide sintering tuaj yeem muab faib ua plaub theem: tshem tawm cov txheej txheem ua ntej thiab ua ntej sintering, cov theem sintering theem (800 ℃ - eutectic kub), kua theem sintering theem (eutectic kub - sintering kub), thiab txias. theem (sintering kub - chav tsev kub). Txawm li cas los xij, vim tias cov txheej txheem sintering yog qhov nyuaj heev thiab cov xwm txheej hnyav, nws yooj yim los tsim qhov tsis xws luag thiab txo qhov zoo ntawm cov khoom. Feem ntau sintering tsis xws luag thiab lawv cov laj thawj yog raws li nram no:

1. Peeling

Cemented carbide nrog tev qhov tsis xws luag yog qhov ua rau tawg thiab chalk. Lub ntsiab yog vim li cas rau tev yog hais tias cov pa roj carbon monoxide decomposes dawb carbon, uas ua rau ib tug txo nyob rau hauv lub zos lub zog ntawm cov khoom pressed, uas ua rau tev.

2. Qhov pores

Pores xa mus rau ntau dua 40 microns. Lub ntsiab yog vim li cas rau tiam ntawm pores yog hais tias muaj impurities nyob rau hauv lub sintered lub cev uas tsis wetted los ntawm cov tshuaj hlau, los yog muaj loj segregation ntawm cov khoom theem thiab cov kua theem, uas tej zaum yuav tsim pores.

3. Ua npaws

Lub hlwv yuav ua rau lub ntsej muag convex ntawm cov cemented carbide, yog li txo qhov kev ua tau zoo ntawm cov khoom tungsten carbide. Cov laj thawj tseem ceeb rau kev tsim ntawm sintered npuas yog:

1) Cua accumulates nyob rau hauv lub cev sintered. Thaum lub sij hawm tus txheej txheem ntawm sintering shrinkage, lub sintered lub cev tshwm sim ua kua theem thiab densifies, uas yuav tiv thaiv cov huab cua los ntawm kev tso tawm, thiab ces tsim slumped npuas nyob rau saum npoo ntawm lub sintered lub cev nrog qhov tsawg kawg nkaus kuj;

2) Muaj cov tshuaj lom neeg cov tshuaj tiv thaiv uas tsim cov roj ntau hauv lub cev sintered, thiab cov pa roj yog concentrated nyob rau hauv lub cev sintered, thiab cov hlwv yog ib txwm tsim.

4. Deformation

Feem ntau deformation tshwm sim ntawm cemented carbide yog blister thiab concave. Lub ntsiab yog vim li cas rau lub deformation yog uneven ceev faib ntawm lub pressed compact. Cov pa roj carbon ntau nyob rau hauv lub cev sintered, tsis tsim nyog lub nkoj thauj khoom, thiab cov phaj tsis sib xws.

5. Dub chaw

Qhov chaw dub yog hais txog ib feem nrog lub koom haum xoob ntawm cov hlau tawg. Qhov laj thawj tseem ceeb rau lub siab dub yog carburizing lossis decarburization.

6. Kev tawg

Crack yog ib qho tshwm sim feem ntau hauv cov txheej txheem sintering ntawm cemented carbide. Cov laj thawj tseem ceeb rau kev tawg yog:

1) Lub siab so tsis tshwm sim tam sim ntawd thaum lub billet qhuav, thiab elastic rov qab sai dua thaum sintering;

2) Lub billet yog ib nrab oxidized thaum nws qhuav, thiab thermal expansion ntawm oxidized ib feem txawv ntawm qhov unoxidized ib feem.

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.