momwe sintering process in powder metallurgy

Moni, abwenzi! Ndife akatswiriopanga zitsulo za ufa ku China.Tili ndi zambiriufa zitsulo sintering wa zigawo zikuluzikulu.Kenako ndikuuzeni momwe mukusinthira muzitsulo za ufa!

 Sintering process mu powder metallurgyakukumana ndi kusintha kwa thupi ndi mankhwala, monga madzi kapena organic evaporation kapena volatilization, adsorption gasi kuyeretsa, kuthetsa nkhawa, ufa tinthu pamwamba oxide kuchepetsa, intergranular zinthu kusamuka, recrystallization ndi kukula mbewu, motero kupanga galasi mawonekedwe pakati particles ukuwonjezeka. , bowolo limachepa kapena kutha.Pamene gawo lamadzimadzi likuwonekera, kusungunuka ndi mpweya wa gawo lolimba lidzachitikanso.Njirazi zilibe malire omveka bwino wina ndi mzake, koma zimadutsana komanso zimakhudzana.Kuwonjezera ena sintering mu zitsulo, zochita zonse zopangidwa ndi ufa zitsulo ndi zovuta.Mu 1942, German GF Schutig ntchito njira kafukufuku thupi ndi mankhwala kuyeza chikoka cha sintering kutentha pa electromotive mphamvu, solubility, kachulukidwe, microstructure, makina katundu wa sintered thupi, ndipo anapeza kuti sintering ndi ndondomeko yovuta kwambiri.Mu 1949, GCKuczynski wa ku United States adaphunzira za sintering ya mipira yachitsulo ndi mbale zachitsulo ndipo amakhulupirira kuti kusamuka kwa zinthu panthawi ya sintering kumachitika makamaka ndi kufalikira.Ntchito yawo inakankhira phunziro la sintering ku siteji yatsopano.Zambiri mwazofukufuku zomwe zatsatira zakhala zikuyang'ana kwambiri pamakina a kusamuka kwa zinthu panthawi ya sintering.

Nthawi zambiri amakhulupirira kuti pali njira zisanu zosinthira zinthu panthawi ya sintering: viscous kapena pulasitiki kutuluka, evaporation ndi condensation, kufalikira kwa voliyumu, kufalikira kwa malire ambewu, ndi kufalikira kwamadzi.Pamene tinthu tating'ono ting'onoting'ono tolumikizana talumikizidwa, kukula kwa khosi lolumikizana ndi X kumatha kukhala kogwirizana ndi nthawi ya sintering motere:

Sintering ndondomeko Sintering ayenera kuchitidwa mu ng'anjo sintering ndi zoteteza mpweya kupewa makutidwe ndi okosijeni wa sintered thupi kapena chokhwima mankhwala zimachitikira.Pali mitundu yambiri ya ng'anjo za sintering, zomwe zitha kugwiritsidwa ntchito ngati magwero otentha monga gasi, gasi, mafuta ndi magetsi.Ng'anjo yotentha yamagetsi ndiyotsika mtengo komanso yosavuta, yosavuta kusintha ndikuwongolera.Zomwe zimagwiritsidwa ntchito poteteza mpweya ndi vacuum, argon, helium, nayitrogeni, carbon dioxide ndi mpweya wina wa inert ndi haidrojeni, kuwonongeka kwa ammonia, carbon monoxide, kutembenuka kwa gasi ndi zina zochepetsera mpweya.

Pofuna kupititsa patsogolo ntchito ya mankhwala opangidwa ndi sintered ndi kukula kwake ndi kulondola kwa mawonekedwe, nthawi zambiri zimakhala zofunikira kupanga mapangidwe, kumaliza, kupondereza, kumiza mafuta, kukonza makina, chithandizo cha kutentha ndi njira zina zotsatila.

jekeseni akamaumba ndondomeko kuyenda

 

Sintering process mu powder metallurgy


Nthawi yotumiza: Jul-29-2022