Zowonongeka Wamba ndi Zomwe Zimayambitsa Tungsten Carbide Sintering

Sintering imatanthawuza njira yosinthira zinthu za ufa kukhala aloyi wandiweyani ndipo ndi gawo lofunikira kwambiri popanga simenti ya carbide. The tungsten carbide sintering ndondomeko akhoza kugawidwa mu magawo anayi: kuchotsedwa kwa kupanga wothandizila ndi pre-sintering siteji, olimba gawo sintering siteji (800 ℃ - kutentha eutectic), madzi gawo sintering siteji (eutectic kutentha - sintering kutentha), ndi kuzirala. siteji (kutentha kwa sintering - kutentha kwa chipinda). Komabe, chifukwa ndondomeko ya sintering ndi yovuta kwambiri ndipo mikhalidwe ndi yovuta, n'zosavuta kupanga zolakwika ndi kuchepetsa ubwino wa mankhwala. Zowonongeka za sintering ndi zifukwa zake ndi izi:

1. Kusenda

Carbide yopangidwa ndi simenti yokhala ndi zopindika za peeling imakonda kuphulika ndi choko. Chifukwa chachikulu chopenta ndi chakuti mpweya wokhala ndi kaboni umawola mpweya waulere, zomwe zimapangitsa kuchepa kwa mphamvu zapaderalo za zinthu zomwe zapanikizidwa, zomwe zimapangitsa kuti peeling.

2. Mabowo

Pores amatanthauza ma microns opitilira 40. Chifukwa chachikulu cha kubadwa kwa pores ndi chakuti pali zonyansa mu thupi la sintered lomwe silinanyowetsidwe ndi chitsulo chachitsulo, kapena pali kulekanitsa kwakukulu kwa gawo lolimba ndi gawo lamadzimadzi, lomwe lingapangitse pores.

3. Matuzu

Chithuzacho chimapangitsa kuti pakhale mawonekedwe owoneka bwino pa carbide yomangidwa, potero kuchepetsa magwiridwe antchito a tungsten carbide. Zifukwa zazikulu zopangira ma sintered thovu ndi awa:

1) Mpweya umachulukana m'thupi la sintered. Pa ndondomeko ya sintering shrinkage, thupi sintered amaoneka madzi gawo ndi densifies, amene kuteteza mpweya kuti asatuluke, ndiyeno kupanga thovu slumped padziko sintered thupi ndi osachepera kukana;

2) Pali mankhwala omwe amapanga mpweya wambiri m'thupi la sintered, ndipo mpweya umakhazikika mu thupi lopangidwa ndi sintered, ndipo chithuzacho chimapangidwa mwachibadwa.

4. Kusintha

Zochitika zodziwika bwino za simenti ya carbide ndi matuza ndi concave. Zifukwa zazikulu za mapindikidwe ndi kusalingana kachulukidwe kachulukidwe wa mbamuikha yaying'ono. Kuperewera kwakukulu kwa kaboni m'thupi lopangidwa ndi sintered, kukweza mabwato mopanda nzeru, komanso mbale yolumikizira yosagwirizana.

5. Pakati pakuda

Pakati wakuda amatanthauza gawo ndi bungwe lotayirira pa alloy fracture. Chifukwa chachikulu cha mitima yakuda ndi carburizing kapena decarburization.

6. Kusweka

Crack ndi chinthu chodziwika bwino pakupanga sintering ya simenti ya carbide. Zifukwa zazikulu za ming'alu ndi:

1) Kupumula kwamphamvu sikumawonetsa nthawi yomweyo billet ikauma, ndipo kuchira kwa zotanuka kumathamanga kwambiri panthawi ya sintering;

2) Billet imakhala ndi oxidized pang'ono ikawuma, ndipo kufalikira kwa kutentha kwa gawo la oxidized ndi kosiyana ndi gawo la unoxidized.

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.