Kusiyanitsa pakati pa chitsulo chothamanga kwambiri ndi chitsulo cha tungsten ndizomveka bwino!

Bwerani kumvetsetsa zitsulo zothamanga kwambiri

Chitsulo chothamanga kwambiri (HSS) ndi chida chachitsulo chokhala ndi kuuma kwakukulu, kukana kuvala kwakukulu ndi kukana kutentha kwakukulu, komwe kumatchedwanso kuti chitsulo champhepo kapena kutsogolo zitsulo, zomwe zikutanthauza kuti zimatha kuumitsidwa ngakhale zitakhazikika mumlengalenga panthawi yozimitsa, ndi ndi chakuthwa kwambiri. Amatchedwanso chitsulo choyera.

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Chitsulo chothamanga kwambiri ndi chitsulo cha alloy chokhala ndi zovuta, zomwe zimakhala ndi zinthu zopanga carbide monga tungsten, molybdenum, chromium, vanadium, ndi cobalt. Chiwerengero chonse cha zinthu za alloying ndi pafupifupi 10-25%. Ikhoza kukhalabe ndi kuuma kwakukulu pansi pa kutentha kwakukulu komwe kumapangidwa ndi kudula kwachangu (pafupifupi 500 ℃), ndipo HRC yake ikhoza kukhala pamwamba pa 60. Ichi ndi chikhalidwe chofunika kwambiri cha chitsulo chothamanga kwambiri - kuuma kofiira. Pambuyo pozimitsa ndi kutentha pang'ono, chitsulo cha carbon chida chimakhala cholimba kwambiri kutentha kwa firiji, koma kutentha kukakhala pamwamba pa 200 ° C, kuuma kumatsika kwambiri, ndipo kuuma kumatsika mpaka kufika pamtunda wofanana ndi wa annealed state. 500°C. , Anataya kwathunthu mphamvu yodula zitsulo, zomwe zimalepheretsa kugwiritsa ntchito carbon tool zitsulo zodula zida. Chitsulo chothamanga kwambiri chimapanga zofooka zakupha za carbon tool steel chifukwa cha kuuma kwake kofiira bwino.

Chitsulo chothamanga kwambiri chimagwiritsidwa ntchito kwambiri popanga zida zoonda kwambiri komanso zida zodulira zitsulo zosagwira ntchito, komanso zitsulo zotentha kwambiri komanso kuzizira kozizira, monga zida zotembenuza, zobowola, hobs, masamba a makina, ndi nkhungu zomwe zimafunikira.

▌ Tiyeni tiphunzire za chitsulo cha tungsten

Chitsulo cha Tungsten (tungsten carbide) chili ndi zinthu zambiri zabwino kwambiri monga kuuma kwakukulu, kukana kuvala, mphamvu zabwino ndi kulimba, kukana kutentha ndi kukana kwa dzimbiri, makamaka kuuma kwake kwakukulu ndi kuvala kukana, ngakhale kutentha kwa 500 ° C. Imakhalabe kwenikweni sichinasinthidwe, ndipo imakhalabe ndi kuuma kwakukulu pa 1000 ° C.

Chitsulo cha Tungsten, zigawo zikuluzikulu ndi tungsten carbide ndi cobalt, zomwe zimapanga 99% ya zigawo zonse, ndipo 1% ndi zitsulo zina, motero zimatchedwa tungsten zitsulo, zomwe zimadziwikanso kuti cemented carbide, ndipo zimatengedwa kuti ndi dzino lamakono. makampani.

Chitsulo cha Tungsten ndi chinthu chopangidwa ndi sintered chopangidwa ndi carbide imodzi yachitsulo. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, ndi tantalum carbide ndi zigawo zofala za tungsten chitsulo. Kukula kwa tirigu wa gawo la carbide (kapena gawo) nthawi zambiri kumakhala pakati pa 0.2-10 microns, ndipo njere za carbide zimagwiridwa pamodzi pogwiritsa ntchito zitsulo zomangira. Zitsulo zomangira nthawi zambiri zimakhala zitsulo zamagulu achitsulo, zomwe zimagwiritsidwa ntchito kwambiri ndi cobalt ndi faifi tambala. Chifukwa chake, pali ma aloyi a tungsten-cobalt, ma aloyi a tungsten-nickel ndi ma alloys a tungsten-titaniyamu-cobalt.

Kutentha kwa chitsulo cha tungsten ndikukankhira ufawo mu billet, ndikuwotchera mu ng'anjo yotentha mpaka kutentha kwina (kutentha kwa sintering), kusunga kwa nthawi (nthawi yogwira), ndiyeno kuziziritsa kuti mupeze. chitsulo cha tungsten chokhala ndi zinthu zofunika.

① Tungsten-cobalt simenti carbide

Zigawo zazikuluzikulu ndi tungsten carbide (WC) ndi binder cobalt (Co). Gulu lake limapangidwa ndi "YG" (oyamba a pinyin yaku China ya "hard, cobalt") ndi kuchuluka kwa cobalt wapakati. Mwachitsanzo, YG8 ikutanthauza kuti pafupifupi WCo = 8%, ndipo yotsalayo ndi tungsten-cobalt simenti carbide ya tungsten carbide.

②Tungsten-titanium-cobalt simenti carbide

Zigawo zazikuluzikulu ndi tungsten carbide, titanium carbide (TiC) ndi cobalt. Gulu lake limapangidwa ndi "YT" (oyamba a pinyin yaku China ya "hard, titaniyamu") komanso kuchuluka kwa titanium carbide. Mwachitsanzo, YT15 imatanthauza kuti pafupifupi TiC=15%, ndipo yotsalayo ndi tungsten carbide ndi cobalt-based tungsten-titanium-cobalt simenti carbide.

③ Tungsten-titanium-tantalum (niobium) yochokera simenti carbide

Zigawo zazikuluzikulu ndi tungsten carbide, titanium carbide, tantalum carbide (kapena niobium carbide) ndi cobalt. Mtundu uwu wa carbide wopangidwa ndi simenti umatchedwanso general cemented carbide kapena universal cemented carbide. Gulu lake limapangidwa ndi "YW" (zoyamba za pinyin yaku China za "hard" ndi "wan") kuphatikiza nambala yotsatizana, monga YW1.

Chitsulo cha Tungsten chili ndi mndandanda wazinthu zabwino kwambiri monga kuuma kwakukulu, kukana kuvala, mphamvu zabwino ndi kulimba, kukana kutentha ndi kukana kwa dzimbiri, makamaka kuuma kwake kwakukulu ndi kukana kuvala, zomwe zimakhalabe zosasinthika ngakhale kutentha kwa 500 ° C. Ikadali ndi kulimba kwakukulu pa 1000 ° C. Carbide ya simenti imagwiritsidwa ntchito kwambiri ngati zida, monga zida zotembenuza, zodulira mphero, zobowolera, zida zosasangalatsa, ndi zina zambiri. Liwiro lodulira la carbide yatsopano yomata ndi nthawi mazana ambiri kuposa chitsulo cha kaboni.