Metal ufa atomization comminuting ndondomeko

Njira yopangira ufa poyika kapena kuswa zitsulo kapena aloyi zamadzimadzi kukhala timadontho ting'onoting'ono ndi madzimadzi othamanga (atomizing medium) ndikumangirira kukhala ufa wolimba. Atomization ndiyo njira yabwino kwambiri yopangira ufa wokwanira wa alloyed, womwe umatchedwa ufa wa pre-alloyed. Chigawo chilichonse cha ufa sichingokhala ndi yunifolomu yopangidwa ndi mankhwala monga aloyi wosungunula woperekedwa, komanso imayeretsa mawonekedwe a crystalline chifukwa cha kulimba mofulumira, ndikuchotsa kusiyana kwakukulu kwa gawo lachiwiri.

Njira ya atomization ikhoza kugawidwa m'mitundu iwiri: "Njira ziwiri zoyenda" (kuphwanya madzi a aloyi ndi atomizing otaya sing'anga) ndi "njira imodzi yotaya" (kuphwanya madzi a aloyi ndi njira zina). 846 yoyamba imagawidwa kukhala gasi (helium, chifunga, nayitrogeni, mpweya) ndi madzi (madzi, mafuta) atomuization sing'anga, otsiriza monga centrifugal atomization ndi kusungunuka mpweya vacuum atomization.

Njira zomwe zimagwiritsidwa ntchito kwambiri ndi gasi atomization ndi madzi atomization. Mu njira ya atomization, zitsulo zosaphika zimasungunuka kukhala madzi aloyi oyenerera (kutenthedwa 100 ~ 150 ° C) mu ng'anjo yamagetsi kapena yolowetsamo, ndiyeno jekeseni mu tundish yomwe ili pamwamba pa nozzle ya atomization. Madzi a alloy amachokera pansi pa dzenje la Tundish, ndipo amasinthidwa kukhala madontho ang'onoang'ono akakumana ndi mpweya wothamanga kwambiri kapena madzi akuyenda kudzera mumphuno. Nthawi zambiri, tinthu tating'onoting'ono ta mpweya wa atomized ufa ndi wozungulira komanso wokhala ndi okosijeni wotsika kwambiri (m'munsi mwa L00 × 10) ndipo amatha kupangidwa kukhala zinthu zolimba mwachindunji ndi njira za thermoforming monga kukanikiza kotentha kwa isostatic. Ambiri mwa madzi atomized ufa particles ndi kusakhazikika mawonekedwe, okhutira mkulu mpweya (pamwamba 600 × 10) ndipo ayenera annealed, koma compressibility wabwino ndipo akhoza kupangidwa ndi ozizira kukanikiza ndiyeno sintered mu mbali makina.

Njira yomwe tatchulayi ya atomization ndi yosavuta kukhala yopangidwa ndi mafakitale ambiri, koma chifukwa madzi a alloy amagwirizana ndi slag ndi Refractory crucible, n'zosapeŵeka kuti zosakaniza zopanda zitsulo zimalowetsedwa mu ufa wotsatira. Choncho, malinga ndi mfundo ESR, Soderfors Powder Company ya Sweden poyamba anasintha Tundish ndi mphamvu 7 T ​​mu ESR (electroslag Kutentha) chipangizo, zili za inclusions sanali zitsulo mu ufa wa chitsulo mkulu liwiro ndi nayitrogeni atomization inatsitsidwa 1/10 wa zili choyambirira, ndi kupinda mphamvu ya ASP powder 3500 MP pa zitsulo 5000 MP pa chitsulo chinawonjezeka.

Muyeso wopewa kuipitsidwa ndi okusayidi kwathunthu komanso moyenera ndikutengera njira ya "Single-flow" atomization, mwachitsanzo, njira yozungulira ya electrode atomization (onani njira yozungulira ya electrode). Komanso, pali zingalowe njira atomization njira angathenso kutulutsa mkulu-chiyero ozungulira ufa. Mfundo ndi: pamene mpweya supersaturated aloyi madzi pansi mavuto mwadzidzidzi poyera vakuyumu, mpweya kusungunuka adzathawa ndi kukula, kuchititsa aloyi madzi atomization, ndiyeno condensed kukhala ufa. Pakuti faifi tambala, mkuwa, cobalt, chitsulo ndi zitsulo zotayidwa masanjidwewo aloyi, njira Kutha wa hydrogen angagwiritsidwe ntchito kukwaniritsa vakuyumu kusungunuka mpweya atomization ufa.