Izindlela Ezimbili Zokuthungatha

Imikhiqizo ye-Tungsten carbide iyinhlanganisela ye-tungsten carbide nezinye izakhi zeqembu lensimbi njenge-cobalt njenge-binder. Imikhiqizo ye-Tungsten carbide ingasetshenziswa kabanzi ekusikeni izinsimbi, izingcezu zokubhoboza uwoyela, kanye nokufa kwensimbi.

I-Tungsten carbide sintering kumele ilawulwe ngokucophelela ukuze kutholwe i-microstructure efanelekile kanye nokwakheka kwamakhemikhali. Ezinhlelweni eziningi, i-tungsten carbide yenziwa nge-powder metallurgy, ehlanganisa ukucwilisa. Imikhiqizo ye-tungsten carbide ivamise ukumelana nokuguga nokushuba ezindaweni ezinokhahlo. Ezingxenyeni eziningi zensimbi zokusika, abasiki be-tungsten carbide abagqoke okungaphezu kuka-0.2-0.4 mm bahlulelwa ukuthi balahliwe. Ngakho-ke, izakhiwo ze-tungsten carbide zibalulekile.

Kunezindlela ezimbili eziyinhloko zokwenza imikhiqizo ye-tungsten carbide. Enye i-hydrogen sintering, kanti enye i-vacuum sintering. I-hydrogen sintering ilawula ukwakheka kwezingxenye nge-phase reaction kinetics ku-hydrogen nokucindezela; i-vacuum sintering ukulawula inhlanganisela ye-tungsten carbide ngokunciphisa i-kinetics yokusabela ngaphansi kwe-vacuum noma indawo yokucindezela komoya ophansi.

I-vacuum sintering inohlu olubanzi lwezinhlelo zokusebenza zezimboni. Kwesinye isikhathi, abasebenzi bangasebenzisa ukucindezela kwe-isostatic okushisayo, okubalulekile futhi ekwenzeni imikhiqizo ye-tungsten carbide.

Ngesikhathi se-hydrogen sintering, i-hydrogen iwumoya onciphisayo. I-hydrogen ingase isabele ngodonga lwesithando somlilo noma i-graphite futhi ishintshe ezinye izingxenye.

Uma kuqhathaniswa ne-hydrogen sintering, i-vacuum sintering inezinzuzo ezilandelayo.

Okokuqala, i-vacuum sintering ingalawula ukwakheka komkhiqizo kahle kakhulu. Ngaphansi kwengcindezi ye-1.3 ~ 133pa, izinga lokushintshaniswa kwekhabhoni nomoya-mpilo phakathi komkhathi ne-alloy liphansi kakhulu. Isici esiyinhloko esithinta ukwakheka okuqukethwe komoyampilo ezinhlayiyeni ze-carbide, ngakho-ke i-vacuum sintering inenzuzo enkulu ekukhiqizweni kwezimboni kwe-sintered tungsten carbide.

Okwesibili, ngesikhathi se-vacuum sintering, kulula kakhulu ukulawula isistimu ye-sintering, ikakhulukazi izinga lokushisa, ukuze kuhlangatshezwane nezidingo zokukhiqiza. I-vacuum sintering wumsebenzi we-batch, oguquguquka kakhulu kune-hydrogen sintering.

Lapho wenza imikhiqizo ye-tungsten carbide, i-tungsten carbide kufanele ihlangabezane nezigaba ezilandelayo:

1. Ukususwa kwe-ejenti yokubumba kanye nesiteji sokushiswa kwangaphambili;

Kule nqubo, izinga lokushisa kufanele lenyuke kancane kancane, futhi lesi sigaba senzeka ngaphansi kuka-1800 ℃.

2. Isiteji esiqinile se-sintering

Njengoba izinga lokushisa likhula kancane kancane, i-sintering iyaqhubeka. Lesi sigaba senzeka phakathi kuka-1800 ℃ nezinga lokushisa le-eutectic.

3. Isigaba samanzi se-sintering

Kulesi sigaba, izinga lokushisa liyaqhubeka likhuphuka kuze kube yilapho lifinyelela izinga lokushisa eliphakeme kakhulu kwinqubo ye-sintering, izinga lokushisa le-sintering.

4. Isiteji sokupholisa

I-carbide enosimende, ngemva kokugcoba, ingasuswa esithandweni somlilo futhi ipholiswe ekamelweni lokushisa.

Uma unentshisekelo emikhiqizweni ye-tungsten carbide futhi ufuna ulwazi olwengeziwe nemininingwane, UNGATHI XHUMANA NATHI ngocingo noma ngemeyili kwesokunxele, noma SITHUMELE IMEYILI ezansi nekhasi.