Kusiyanitsa pakati pa chitsulo chothamanga kwambiri ndi chitsulo cha tungsten kumafotokozedwa momveka bwino!

Bwerani mudzaphunzire za HSS
 
Chitsulo chothamanga kwambiri (HSS) ndi chida chachitsulo chokhala ndi kuuma kwakukulu, kukana kuvala kwakukulu ndi kukana kutentha kwakukulu, komwe kumatchedwanso kuti chitsulo champhepo kapena chitsulo chakuthwa, kutanthauza kuti chimawumitsa ngakhale chikazizira mumlengalenga panthawi yozimitsa ndipo chimakhala chakuthwa. Amatchedwanso chitsulo choyera.
 
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 ma alloying amafika pafupifupi 10 mpaka 25%. Ikhoza kusunga kuuma kwakukulu pansi pa kutentha kwakukulu (pafupifupi 500 ℃) mu kudula kwambiri, HRC ikhoza kukhala pamwamba pa 60. Ichi ndi khalidwe lofunika kwambiri la HSS - kuuma kofiira. Ndipo mpweya chida zitsulo ndi kuzimitsira ndi otsika kutentha tempering, firiji, ngakhale pali kuuma mkulu kwambiri, koma pamene kutentha ndi apamwamba kuposa 200 ℃, kuuma kutsika kwambiri, mu 500 ℃ kuuma watsikira ku digiri yofanana ndi boma annealed, kwathunthu anataya mphamvu kudula zitsulo, amene malire mpweya chida zitsulo kudula zida. Ndipo chitsulo chothamanga kwambiri chifukwa cha kuuma bwino kofiira, kuti apange zofooka zakupha za carbon tool steel.
 
Chitsulo chothamanga kwambiri chimagwiritsidwa ntchito kwambiri popanga zida zodulira zitsulo zoonda kwambiri komanso zosagwira ntchito, komanso kupanga zitsulo zotentha kwambiri komanso kuzizira kozizira, monga zida zotembenuza, zobowolera, hobs, masamba ocheka makina ndi kufa kofunikira.
Bwerani mudzaphunzire za tungsten zitsulo

Tungsten zitsulo (carbide) ali mndandanda wa zinthu zabwino kwambiri monga kuuma mkulu, kuvala kukana, mphamvu bwino ndi kulimba, kukana kutentha, kukana dzimbiri, etc. Makamaka kuuma kwake mkulu ndi kuvala kukana amakhalabe kwenikweni osasintha ngakhale pa kutentha 500 ℃; ndikukhalabe ndi kuuma kwakukulu pa 1000 ℃.
 
Chitsulo cha Tungsten, chomwe zigawo zake zazikulu ndi tungsten carbide ndi cobalt, zimapanga 99% ya zigawo zonse ndi 1% yazitsulo zina, motero zimatchedwa tungsten zitsulo, zomwe zimatchedwanso cemented carbide, ndipo zimatengedwa kuti ndi mano amakampani amakono.
 
Chitsulo cha Tungsten ndi chinthu chopangidwa ndi sintered chomwe chimakhala ndi chitsulo chimodzi cha carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, ndi tantalum carbide ndi zigawo wamba za tungsten chitsulo. Kukula kwa njere ya gawo la carbide (kapena gawo) nthawi zambiri kumakhala ma microns 0.2-10, ndipo njere za carbide zimalumikizidwa palimodzi pogwiritsa ntchito chomangira chitsulo. Zitsulo zomangira nthawi zambiri zimakhala zitsulo zamagulu achitsulo, nthawi zambiri cobalt ndi faifi tambala. Chifukwa chake pali ma aloyi a tungsten-cobalt, ma aloyi a tungsten-nickel ndi ma aloyi a tungsten-titaniyamu-cobalt.

Tungsten sinter kupanga ndi kukanikiza ufa mu billet, ndiye mu ng'anjo sintering kutentha kwa kutentha kwina (sintering kutentha) ndi kusunga kwa nthawi inayake (kugwira nthawi), ndiyeno kuziziziritsa izo pansi kupeza tungsten chitsulo. zakuthupi ndi zinthu zofunika.
 
① Tungsten ndi cobalt cemented carbide
Chigawo chachikulu ndi tungsten carbide (WC) ndi binder cobalt (Co). Gululi limapangidwa ndi "YG" ("hard, cobalt" ku Hanyu Pinyin) ndi kuchuluka kwa cobalt pafupifupi. Mwachitsanzo, YG8, kutanthauza pafupifupi WCo = 8% ndipo yotsalayo ndi tungsten carbide simenti carbide.
 
②Tungsten, titaniyamu ndi cobalt cemented carbide
Zigawo zazikuluzikulu ndi tungsten carbide, titanium carbide (TiC) ndi cobalt. Gululi limapangidwa ndi "YT" ("hard, titaniyamu" ku Hanyu Pinyin) komanso kuchuluka kwa titanium carbide. Mwachitsanzo, YT15, imatanthauza pafupifupi TiC=15%, yotsalayo ndi tungsten carbide ndi cobalt zomwe zili mu tungsten titanium cobalt carbide.
 
③Tungsten-titanium-tantalum (niobium) carbide
Zigawo zazikuluzikulu ndi tungsten carbide, titanium carbide, tantalum carbide (kapena niobium carbide) ndi cobalt. Mtundu uwu wa carbide umatchedwanso carbide-purpose carbide kapena universal carbide. Gululi lili ndi "YW" ("zovuta" ndi "miliyoni" mu Hanyu Pinyin) kuphatikiza nambala yotsatizana, monga YW1.

Tungsten zitsulo ali ndi mndandanda wa zinthu zabwino kwambiri monga kuuma mkulu, kuvala kukana, mphamvu bwino ndi kulimba, kukana kutentha, kukana dzimbiri, etc. Makamaka kuuma kwake mkulu ndi kuvala kukana amakhalabe kwenikweni osasintha ngakhale pa kutentha 500 ℃, ndipo akadali ndi kuuma kwakukulu pa 1000 ℃. Carbide yopangidwa ndi simenti imagwiritsidwa ntchito kwambiri ngati zida, monga zida zosinthira, zida za mphero, kubowola, zida zosasangalatsa, ndi zina zambiri. Liwiro lodula la carbide yatsopano ndi lofanana ndi mazana a nthawi ya chitsulo cha kaboni.