Hanyoyi biyu na Sintering

Tungsten carbide kayayyakin sun hada da tungsten carbide da sauran baƙin ƙarfe rukuni abubuwa kamar cobalt a matsayin mai ɗaure. Tungsten carbide kayayyakin za a iya amfani da ko'ina a yankan karafa, mai rawar soja rago, da karfe forming mutu.

Tungsten carbide sintering dole ne a sarrafa a hankali don samun ingantacciyar microstructure da sinadaran sinadaran. A cikin aikace-aikace da yawa, tungsten carbide ana yin shi ta hanyar ƙarfe na foda, wanda ya haɗa da sintering. Samfuran carbide na Tungsten sau da yawa suna jure lalacewa da rauni a cikin yanayi mai tsauri. A mafi yawan aikace-aikacen ƙarfe na yanke, tungsten carbide cutters tare da lalacewa sama da 0.2-0.4 mm ana yanke hukuncin soke su. Saboda haka, abubuwan da ke cikin tungsten carbide suna da mahimmanci.

Akwai manyan hanyoyi guda biyu don sinter tungsten carbide kayayyakin. Daya shine hydrogen sintering, ɗayan kuma shine vacuum sintering. Hydrogen sintering yana sarrafa abun da ke ciki na sassa ta hanyar halayen halayen lokaci a cikin hydrogen da matsa lamba; Vacuum sintering yana sarrafa hadadden tungsten carbide ta hanyar rage jinkirin motsin motsin motsi a ƙarƙashin vacuum ko ƙarancin iska.

Vacuum sintering yana da faffadan aikace-aikacen masana'antu. Wani lokaci, ma'aikata na iya amfani da matsi na isostatic mai zafi, wanda kuma yana da mahimmanci don kera samfuran carbide tungsten.

Lokacin sintering hydrogen, hydrogen shine yanayin ragewa. Hydrogen na iya mayar da martani tare da bangon tanderun da ke murƙushewa ko graphite kuma ya canza wasu abubuwan.

Idan aka kwatanta da hydrogen sintering, vacuum sintering yana da wadannan abũbuwan amfãni.

Da farko, vacuum sintering na iya sarrafa abun da ke cikin samfurin sosai. A ƙarƙashin matsin lamba na 1.3 ~ 133pa, musayar musayar carbon da oxygen tsakanin yanayi da gami yana da ƙasa sosai. Babban abin da ke shafar abun da ke ciki shine abun da ke cikin oxygen a cikin ƙwayoyin carbide, don haka vacuum sintering yana da fa'ida mafi girma a cikin samar da masana'antu na tungsten carbide sintered.

Abu na biyu, a lokacin vacuum sintering, yana da sauƙi don sarrafa tsarin sinadari, musamman ma yawan dumama, don biyan bukatun samarwa. Vacuum sintering aiki ne na batch, wanda ya fi sassauƙa fiye da sintirin hydrogen.

Lokacin da ake sarrafa samfuran carbide tungsten, tungsten carbide dole ne ya fuskanci matakai masu zuwa:

1. Cire na'urar gyare-gyare da kuma matakin farko na ƙonawa;

A cikin wannan tsari, ya kamata a ƙara yawan zafin jiki a hankali, kuma wannan mataki ya faru a kasa 1800 ℃.

2. M-lokaci sintering mataki

Yayin da yawan zafin jiki ke karuwa a hankali, ana ci gaba da sintiri. Wannan mataki yana faruwa tsakanin 1800 ℃ da eutectic zafin jiki.

3. Liquid phase sintering mataki

A wannan mataki, zafin jiki yana ci gaba da hauhawa har sai ya kai ga mafi yawan zafin jiki a cikin tsarin sintiri, yanayin zafi.

4. Matakin sanyaya

Carbide da aka yi da siminti, bayan yin gyare-gyare, za a iya cire shi daga tanderun da aka sanyaya kuma a sanyaya zuwa zafin jiki.

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.