Njira ziwiri za Sintering

Zogulitsa za Tungsten carbide zimakhala ndi tungsten carbide ndi zinthu zina zamagulu achitsulo monga cobalt ngati chomangira. Zogulitsa za Tungsten carbide zitha kugwiritsidwa ntchito kwambiri podula zitsulo, kubowola mafuta, komanso kupanga zitsulo.

Tungsten carbide sintering iyenera kuyendetsedwa mosamala kuti ipeze mawonekedwe abwino a microstructure ndi mankhwala. Mu ntchito zambiri, tungsten carbide amapangidwa ndi ufa zitsulo, kuphatikizapo sintering. Zogulitsa za Tungsten carbide nthawi zambiri zimapirira kuvala komanso kulimba m'malo ovuta. Nthawi zambiri zitsulo zodula, ocheka a tungsten carbide okhala ndi mavalidwe opitilira 0.2-0.4 mm amaonedwa kuti amachotsedwa. Chifukwa chake, zinthu za tungsten carbide ndizofunikira.

Pali njira ziwiri zazikulu zopangira mankhwala a sinter tungsten carbide. Imodzi ndi sintering wa hydrogen, ndipo inayo ndi vacuum sintering. Hydrogen sintering ndi kulamulira zikuchokera mbali ndi gawo reaction kinetics mu haidrojeni ndi kuthamanga; vacuum sintering ndikuwongolera kaphatikizidwe ka tungsten carbide pochepetsa momwe ma kinetics amachitira pansi pa vacuum kapena kutsika kwamphamvu kwa mpweya.

Vacuum sintering ili ndi ntchito zambiri zamafakitale. Nthawi zina, ogwira ntchito amatha kuyika makina otentha a isostatic, omwenso ndi ofunikira popanga zinthu za tungsten carbide.

Panthawi ya hydrogen sintering, haidrojeni ndi mpweya wochepetsera. Hydrojeni imatha kuchitapo kanthu ndi khoma la ng'anjo ya sintering kapena graphite ndikusintha zina.

Poyerekeza ndi hydrogen sintering, vacuum sintering ali ndi ubwino zotsatirazi.

Choyamba, vacuum sintering imatha kuwongolera kapangidwe kake bwino kwambiri. Pansi pa kupanikizika kwa 1.3 ~ 133pa, kusinthanitsa kwa carbon ndi mpweya pakati pa mlengalenga ndi alloy ndi otsika kwambiri. Chinthu chachikulu chomwe chimakhudza kapangidwe kake ndi mpweya wa okosijeni mu tinthu tating'onoting'ono ta carbide, kotero kuti vacuum sintering imakhala ndi mwayi waukulu pakupanga mafakitale a sintered tungsten carbide.

Kachiwiri, panthawi ya vacuum sintering, ndizosavuta kuwongolera makina opangira sintering, makamaka kutentha kwa kutentha, kuti akwaniritse zosowa za kupanga. Vacuum sintering ndi ntchito ya batch, yomwe imakhala yosinthika kuposa sintering wa hydrogen.

Mukamapanga zinthu za tungsten carbide, tungsten carbide iyenera kukumana ndi izi:

1. Kuchotsedwa kwa woumba ndi sitepe yoyaka moto;

Pochita izi, kutentha kuyenera kuwonjezeka pang'onopang'ono, ndipo gawoli limachitika pansi pa 1800 ℃.

2. Olimba-gawo sintering siteji

Pamene kutentha kukuwonjezeka pang'onopang'ono, sintering ikupitirirabe. Gawoli limachitika pakati pa 1800 ℃ ndi kutentha kwa eutectic.

3. Madzi gawo sintering siteji

Panthawi imeneyi, kutentha kumapitirira kukwera mpaka kufika kutentha kwambiri mu sintering, kutentha kwa sintering.

4. Kuzizira siteji

Carbide yokhala ndi simenti, itatha kutenthedwa, imatha kuchotsedwa mu ng'anjo ya sintering ndikukhazikika mpaka kutentha.

Ngati muli ndi chidwi ndi zinthu za tungsten carbide ndipo mukufuna zambiri ndi zambiri, mutha KULUMIKIZANA NAFE pa lamya kapena makalata kumanzere, kapena TITUMIZANI MAIME pansi pa tsamba.