Cemented carbideLub tshuab nqus tsev sintering yog txheej txheem uas sintering yog ua los ntawm lub siab hauv qab atmospheric siab.Cov txheej txheem no suav nrog kev tshem tawm plasticizer, degassing, khoom theem sintering, kua theem sintering, alloying, densification, thiab kev sib cais los nag.Cia peb saib plaub yam tseem ceeb ntawm cemented carbide nqus tsev sintering:
① Plasticizer tshem tawm theem
Cov txheej txheem tshem tawm plasticizer pib los ntawm chav tsev kub thiab nce mus txog 200 ° C.Cov pa roj adsorbed rau ntawm qhov chaw ntawm cov hmoov nplej nyob rau hauv lub billet yog cais los ntawm qhov chaw ntawm cov khoom los ntawm tshav kub thiab khiav tawm ntawm lub billet tsis tu ncua.Lub plasticizer nyob rau hauv lub billet yog rhuab kom dim ntawm lub billet.Kev tuav lub tshuab nqus tsev siab yog qhov tsim nyog rau kev tso tawm thiab khiav tawm ntawm cov pa roj.Ntau hom plasticizers raug hloov pauv hauv kev ua haujlwm sib txawv, kev txhim kho cov txheej txheem tshem tawm cov yas yuav tsum tau txiav txim siab raws li qhov xwm txheej tshwj xeeb ntawm kev sim.Qhov dav dav plasticizer gasification kub yog qis dua 550 ℃.
② Pre-fired theem
Pre-sintering theem yog hais txog qhov kub thiab txias sintering ua ntej sintering, kom cov tshuaj oxygen hauv cov hmoov thiab cov pa roj carbon monoxide txo cov tshuaj tiv thaiv kom tsim cov pa roj carbon monoxide tawm hauv cov xovxwm billet, yog tias cov roj no tsis tuaj yeem raug cais tawm thaum cov kua theem tshwm, nws yuav dhau los ua qhov kaw qhov pore residue nyob rau hauv cov hlau, txawm hais tias lub zog sintering, nws nyuaj rau tshem tawm.Ntawm qhov tod tes, lub xub ntiag ntawm oxidation yuav cuam tshuam rau lub wettability ntawm cov kua theem mus rau theem nyuaj thiab nws thiaj li cuam tshuam rau cov txheej txheem densification.cemented carbide.Ua ntej cov kua theem tshwm, nws yuav tsum tau degassed txaus thiab lub tshuab nqus tsev siab tshaj plaws yuav tsum tau siv.
③ Kub kub sintering theem
Lub sintering kub thiab lub sij hawm sintering yog cov txheej txheem tseem ceeb rau densification ntawm lub billet, tsim ib homogeneous qauv thiab tau txais cov khoom uas yuav tsum tau.Lub sintering kub thiab sintering lub sij hawm nyob ntawm seb lub alloy muaj pes tsawg leeg, hmoov loj, sib tsoo lub zog ntawm cov sib tov thiab lwm yam, thiab kuj yog tswj los ntawm tag nrho cov tsim ntawm cov khoom.
④ Txias theem
Cov theem cua txias yog qhov uas tus nqi cua txias cuam tshuam rau qhov muaj pes tsawg leeg thiab cov qauv ntawm kev sib koom ua ke ntawm cov hlau alloy thiab ua rau muaj kev ntxhov siab sab hauv.Tus nqi cua txias yuav tsum nyob rau hauv lub xeev tswj.Sintering kub isostatic pressing yog ib tug tshiab sintering txheej txheem, tseem hu ua low-pressure sintering, nyob rau hauv uas cov khoom yog pressurized nrog ib tug tej yam lub siab ntawm cov pa los txhawb densification nyob rau hauv cov xwm txheej uas degassing tiav, lub pores nyob rau saum npoo ntawm lub pressed billet. tau raug kaw, thiab lub binder theem tseem ua kua.
Post lub sij hawm: Jun-20-2023
