Magawo Anayi Oyambira a Tungsten Carbide Sintering process

Tungsten carbide, yomwe imadziwikanso kuti cemented carbide, ili ndi mawonekedwe olimba kwambiri, kulimba kwambiri, kukana kuvala bwino komanso kulimba, kukana kutentha kwambiri, komanso kukana dzimbiri. Ndipo nthawi zambiri amagwiritsidwa ntchito popanga zida zobowola, zida zamigodi, zida zodulira, zida zosagwira ntchito, zitsulo zimafa, zonyamula zolondola, ma nozzles, ndi zina zambiri.

Sintering ndiye njira yayikulu yopangira zinthu za tungsten carbide. Pali magawo anayi ofunikira a tungsten carbide sintering process.

1. Pre-sintering stage (Kuchotsedwa kwa forming agent ndi pre-sintering stage)

Kuchotsa chopangiracho: Ndi kuwonjezeka kwa kutentha koyambirira kwa sintering, chopangiracho pang'onopang'ono chimawola kapena kusungunuka, potero chimachotsa ku sintered m'munsi. Panthawi imodzimodziyo, wopanga adzawonjezera carbon ku sintered m'munsi mochuluka kapena mocheperapo, ndipo kuchuluka kwa carbon kuwonjezeka kudzasiyana ndi mtundu ndi kuchuluka kwa kupanga wothandizira ndi ndondomeko ya sintering.

Ma oxides pamwamba pa ufa amachepetsedwa: pa kutentha kwa sintering, haidrojeni imatha kuchepetsa ma oxide a cobalt ndi tungsten. Ngati chopangiracho chichotsedwa mu vacuum ndi sintered, mpweya wa carbon-oksijeni sungakhale wamphamvu kwambiri. Pamene kukhudzana maganizo pakati pa ufa particles pang'onopang'ono kuthetsedwa, kugwirizana zitsulo ufa adzayamba kuchira ndi recrystallize, pamwamba adzayamba diffuse, ndipo yaying'ono mphamvu adzawonjezeka moyenerera.

Panthawi imeneyi, kutentha kumakhala kosakwana 800 ℃

2. Solid-phase sintering stage (800℃——kutentha kwa eutectic)

800 ~ 1350C ° tungsten carbide ufa wa tirigu kukula kukula ndi kuphatikiza ndi cobalt ufa kukhala eutectic.

Pakutentha kusanayambe kuwonekera kwa gawo lamadzimadzi, mphamvu ya gawo lolimba ndi kufalikira kumawonjezereka, kutuluka kwa pulasitiki kumawonjezeka, ndipo thupi la sintered limachepa kwambiri.

3. Liquid phase sintering stage (eutectic kutentha - sintering kutentha)

Pa 1400 ~ 1480C ° binder ufa udzasungunuka kukhala madzi. Pamene gawo lamadzimadzi likuwonekera m'munsi mwa sintered, shrinkage imatsirizidwa mwamsanga, ndikutsatiridwa ndi kusintha kwa crystallographic kuti apange maziko ndi mapangidwe a alloy.

4. Kuzizira siteji ( Sintering kutentha - chipinda kutentha)

Panthawiyi, mapangidwe ndi mawonekedwe a tungsten carbide asintha ndi kuzizira kosiyanasiyana. Izi zitha kugwiritsidwa ntchito kutentha ngalande ya tungsten carbide kuti ipititse patsogolo mawonekedwe ake akuthupi komanso amakina.

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.