Matakai guda huɗu na Tsarin Tungsten Carbide Sintering

Tungsten carbide, wanda kuma aka sani da siminti carbide, yana da halaye na babban taurin, ƙarfin ƙarfi, juriya mai kyau da tauri, kyakkyawan juriya mai zafi, da juriya na lalata. Kuma ana amfani da shi sau da yawa don yin kayan aikin hakowa, kayan aikin hakar ma'adinai, kayan aikin yanke, sassa masu jurewa, mutuwar ƙarfe, madaidaiciyar bearings, nozzles, da sauransu.

Sintering shine babban tsari don yin samfuran carbide tungsten. Akwai matakai huɗu na asali na tsarin tungsten carbide sintering.

1. Pre-sintering mataki (cire forming wakili da pre-sintering mataki)

Cire wakili mai ƙira: Tare da haɓakar zafin jiki na farko na sintering, wakili mai ƙirƙira a hankali yana rubewa ko vaporizes, ta haka yana kawar da tushe mai tushe. A lokaci guda kuma, wakili mai ƙira zai ƙara carbon zuwa tushe mai zurfi ko žasa, kuma adadin karuwar carbon zai bambanta tare da nau'i da adadin nau'in nau'i na nau'i da kuma tsarin sintiri.

An rage oxides a saman foda: a yanayin zafi mai zafi, hydrogen zai iya rage oxides na cobalt da tungsten. Idan an cire wakili mai ƙirƙira a cikin injin daskarewa kuma an lalata shi, halayen carbon-oxygen ba zai yi ƙarfi sosai ba. Yayin da aka kawar da damuwa na lamba tsakanin ƙwayoyin foda a hankali, foda na haɗin gwiwa zai fara farfadowa da recrystallize, farfajiyar za ta fara yadawa, kuma ƙananan ƙarfin zai karu daidai.

A wannan mataki, zafin jiki bai wuce 800 ℃ ba

2. M-lokaci sintering mataki (800 ℃ — — eutectic zafin jiki)

800 ~ 1350C° tungsten carbide foda girman hatsi girma girma da kuma hada da cobalt foda ya zama eutectic.

A yanayin zafin jiki kafin bayyanar yanayin ruwa, ƙarfin-lokaci mai ƙarfi da watsawa yana ƙaruwa, ana haɓaka kwararar filastik, kuma jikin da aka lalata yana raguwa sosai.

3. Liquid lokaci sintering mataki (eutectic zazzabi - sintering zafin jiki)

A 1400 ~ 1480C ° foda mai ɗaure zai narke cikin ruwa. Lokacin da lokaci na ruwa ya bayyana a cikin tushe mai tushe, raguwa yana ƙare da sauri, ya biyo baya da canji na crystallographic don samar da tsari na asali da tsarin gami.

4. Matakin sanyaya (Santering zafin jiki - dakin zafin jiki)

A wannan mataki, tsarin da tsarin lokaci na tungsten carbide ya canza tare da yanayin sanyaya daban-daban. Ana iya amfani da wannan siffa don zafi-rara tungsten carbide don inganta yanayin jiki da na inji.

Idan kuna sha'awar samfuran carbide tungsten kuma kuna son ƙarin bayani da cikakkun bayanai, zaku iya tuntuɓar mu ta waya ko wasiƙa a hagu, ko Aika wasiƙun Amurka a kasan shafin.