Raws li lub npe ntawm kev lag luam hniav carbide, feem ntau ntawm cov neeg uas tau siv nws tsis paub yuav ua li cas carbide tsim thiab qhov txawv ntawm nws cov txheej txheem ntau lawm, qhov tseeb, kev tsim cov carbide muaj feem xyuam nrog kev siv ib puag ncig.Piv txwv li, carbide rau mining, carbide rau pob zeb drilling, carbidecov cuab yeej tig, thiab lwm yam yog tag nrho raws li kev siv ib puag ncig.Kuj muaj xws li corrosion resistant carbide thiab lwm yam.
Cemented Carbide ua li cas?Nws cov txheej txheem ntau lawm yog dab tsi?
Cov txheej txheem ntau lawm ntawm cemented carbide feem ntau yog raws li nram no: refractory hlau hard compounds (tungsten carbide, tantalum carbide, thiab lwm yam), sib txuas hlau (cobalt hmoov los yog nickel hmoov) thiab ib tug me me ntawm additives (stearic acid los yog esomin) yog tov thiab hauv av hauv hexane sib tsoo nruab nrab, thiab cov slurry ntawm paraffin wax ntxiv, tom qab ntawd lub tshuab nqus tsev qhuav (los yog tshuaj tsuag qhuav), sieved, granulated, thiab ua rau hauv cov khoom sib xyaw;cov khoom sib xyaw yog txheeb xyuas thiab tsim nyog, thiab tom qab precision Cov khoom sib xyaw tau txheeb xyuas thiab tsim nyog, ces nias kom ua kom muaj qhov siab-precision xovxwm billet;Cov ntawv xovxwm yog sintered los ntawm lub tshuab nqus tsev dewaxing lossis qis-siab sintering los uacemented carbide.
Sintering txoj cai
Lub tshuab nqus tsev sintering txheej txheem yog ua los ntawm cua sov nyob rau hauv lub tshuab nqus tsev tej yam kev mob, uas yog conducive mus tshem tawm impurities, txhim kho lub purity ntawm sintering cua, txhim kho lub wettability ntawm lub tsev cog khoom theem thiab txhawb cov tshuaj tiv thaiv.Lub pressed billet yog rhuab nyob rau hauv lub tshuab nqus tsev sintering cua, thiab raws li qhov kub thiab txias nce mus txog lub evaporation kub, nws khiav tawm ntawm lub pressed billet thiab tuav rau ib tug txaus lub sij hawm ntawm ib feem ntawm lub siab ntawm paraffin vapor tsawg tshaj li qhov kub thiab txias, thiab paraffin. yog tawm los ntawm cov pressed billet * thiab zoo, thiab cov pressed billet yog purified.Raws li qhov kub thiab txias nce ntxiv, lub billet yog degassed thiab ntxiv purified, thiab solid-phase sintering ensues.Nyob rau hauv cov txheej txheem sintering khoom, cov atoms (los yog molecules) ntawm txhua yam nyob rau hauv sintered lub cev diffuse, particle contact nto nce, qhov deb ntawm hais txo, lub sintered lub cev shrinks thiab ntxiv dag zog.Thaum qhov kub thiab txias yog ze rau lub melting point ntawm lub bonded theem, lub bonded theem pib yas ntws, thiab thaum lub kub ntawm cov kua theem mus txog, lub sintered lub cev tsim cov kua theem thiab cov kua theem sintering tshwm sim.
Hauv cov txheej txheem ua kua theem sintering, cov txheej txheem ua kua theem tshwm rau ntawm qhov chaw carbide, thiab covcarbideCov particles yaj nyob rau hauv cov txheej txheem sib txuas los ntawm diffusion los ua ib qho eutectic, thiab cov carbide hais recrystallize thiab loj hlob nyob rau hauv loj los ntawm cov kua theem, thiaj li hais tias cov carbide hais uas nyob ib sab sib txuas, thiab lub cev sintered shrinks ntxiv thiab densifies sai heev.Lub cev sintered yog ntxiv shrunk thiab sai densified.Nws tau tuav ntawm qhov kub siab tshaj qhov ntsuas kub ntawm cov kua theem rau lub sijhawm kom tso cai rau cov txheej txheem sintering mus tas li, thiab tom qab ntawd txias.
Thoob plaws hauv cov txheej txheem sintering, lub cev sintered yog densified mus rau ze tsis-porosity, thiab ib tug series ntawm physicochemical teebmeem thiab kev kho lub koom haum yog tsim, uas ua rau tsim ib tug ntom, cemented carbide nrog ib tug tej yam tshuaj muaj pes tsawg leeg, lub cev thiab txhua yam khoom, thiab lub koom haum.
Post lub sij hawm: Jun-29-2023
