Iindlela ezimbini zeSintering

Iimveliso ze-tungsten carbide ziyi-tungsten carbide kunye nezinye izinto zeqela lentsimbi njenge-cobalt njengesibophelelo. Iimveliso ze-tungsten carbide zinokusetyenziswa ngokubanzi ekusikeni isinyithi, i-oyile ye-drill bits, kunye nesinyithi sokwenza ukufa.

I-tungsten carbide sintering kufuneka ilawulwe ngononophelo ukufumana i-microstructure efanelekileyo kunye nokwakheka kweekhemikhali. Kwizicelo ezininzi, i-tungsten carbide yenziwe nge-powder metallurgy, ebandakanya i-sintering. Iimveliso ze-tungsten carbide zihlala zimelana nokunxiba kunye nokuxinezeleka kwiindawo ezinzima. Kwiinkqubo ezininzi zokusika isinyithi, i-tungsten carbide cutters eneengubo ezingaphezulu kwe-0.2-0.4 mm zigwetywa ukuba zichithwe. Ke ngoko, iipropathi ze-tungsten carbide zibalulekile.

Kukho iindlela ezimbini eziphambili zokwenza iimveliso ze-tungsten carbide. Enye i-hydrogen sintering, kwaye enye i-vacuum sintering. I-Hydrogen sintering ilawula ukubunjwa kwamalungu nge-phase reaction kinetics kwi-hydrogen kunye noxinzelelo; i-vacuum sintering ilawula i-composite ye-tungsten carbide ngokucothisa i-reaction kinetics phantsi kwe-vacuum okanye indawo yoxinzelelo lomoya ophantsi.

I-vacuum sintering inoluhlu olubanzi lwezicelo zamashishini. Ngamanye amaxesha, abasebenzi banokufaka i-isostatic eshushu yokucinezela, ekwabalulekile ekwenzeni iimveliso ze-tungsten carbide.

Ngexesha le-hydrogen sintering, i-hydrogen yindawo yokunciphisa umoya. IHydrojeni inokusabela ngodonga lwesithando somlilo okanye igraphite kwaye itshintshe amanye amacandelo.

Xa kuthelekiswa ne-hydrogen sintering, i-vacuum sintering inezi nzuzo zilandelayo.

Okokuqala, i-vacuum sintering inokulawula ukubunjwa kwemveliso kakuhle kakhulu. Ngaphantsi koxinzelelo lwe-1.3 ~ 133pa, izinga lokutshintsha kwekhabhoni kunye ne-oksijini phakathi kwe-atmospheric kunye ne-alloy iphantsi kakhulu. Into ephambili echaphazela ukubunjwa ngumxholo we-oksijini kwiincinci ze-carbide, ngoko ke i-vacuum sintering inenzuzo enkulu kwimveliso yoshishino ye-sintered tungsten carbide.

Okwesibini, ngexesha le-vacuum sintering, iguquguquka ngakumbi ukulawula inkqubo ye-sintering, ngakumbi izinga lokushisa, ukuhlangabezana neemfuno zemveliso. I-vacuum sintering ngumsebenzi webhetshi, obhetyebhetye ngakumbi kune-hydrogen sintering.

Xa usenza imveliso ye-tungsten carbide, i-tungsten carbide kufuneka ibe namava alandelayo:

1. Ukususwa kwe-ejenti yokubumba kunye nesigaba sokutshisa kwangaphambili;

Kule nkqubo, ubushushu kufuneka bonyuswe ngokuthe ngcembe, kwaye esi sigaba senzeke ngaphantsi kwe-1800 ℃.

2. Inqanaba eliqinileyo le-sintering

Njengoko iqondo lobushushu likhula kancinci, i-sintering iyaqhubeka. Eli nqanaba lenzeka phakathi kwe-1800 ℃ kunye nobushushu be-eutectic.

3. Isigaba solwelo sintering

Ngeli nqanaba, iqondo lokushisa liqhubeka linyuka lide lifikelele kwelona qondo liphezulu kwi-sintering process, iqondo lokushisa lokutshisa.

4. Inqanaba lokupholisa

I-carbide ene-cemented, emva kwe-sintering, inokususwa kwisithando somlilo kwaye ipholile kwiqondo lokushisa.

Ukuba unomdla kwiimveliso ze-tungsten carbide kwaye ufuna ulwazi oluthe kratya kunye neenkcukacha, ungaQHAGAMSHELANA NATHI ngefowuni okanye ngeposi ekhohlo, okanye SITHUMELE MAIL emazantsi ephepha.