Itandukaniro nyamukuru hagatiibyuma bya austenitisna ferritic ibyuma bidafite ibyuma biri muburyo n'imiterere yabyo.
Austenitike ibyuma bitagira umuyonga ni ishyirahamwe riguma rihamye gusa ku bushyuhe buri hejuru ya 727 ° C.Yerekana plastike nziza kandi nuburyo bwatoranijwe kumashanyarazi menshi arimo gutunganywa nubushyuhe bwo hejuru.Byongeye kandi, ibyuma bya austenitis ntabwo ari magnetique.
Ferrite nigisubizo gikomeye cya karubone yashonga muri α-fer, akenshi igereranwa nka F. Muriibyuma, "ferrite" bivuga igisubizo gikomeye cya karubone muri α-fer, irangwa nubushobozi buke bwa karubone.Ku bushyuhe bwicyumba, irashobora gushonga gusa kugeza kuri 0.0008% ya karubone, ikagera kuri karuboni ntarengwa ya 0,02% kuri 727 ° C, mugihe ikomeza kubumba umubiri.Bikunze kugaragazwa nikimenyetso F.
Kurundi ruhande, ferriticibyumabivuga ibyuma bitagira umwanda ahanini bigizwe nuburyo bwa ferritic mugihe cyo gukoresha.Irimo chromium mu ntera ya 11% kugeza 30%, igaragaramo umubiri-ushingiye ku mubiri.Ibyuma birimo ibyuma bitagira umuyonga ntaho bihuriye nimba byashyizwe mubyuma bya ferritic.
Bitewe na karubone nkeya, ferritic stainless ibyuma byerekana ibintu bisa nicyuma cyiza, harimo plastike nziza hamwe nubukomere hamwe nigipimo cyo kuramba (δ) cya 45% kugeza 50%.Nyamara, imbaraga zayo nubukomezi biri hasi cyane, hamwe nimbaraga zingana (σb) zingana na MPa 250 hamwe na Brinell ikomeye (HBS) ya 80.
Igihe cyo kohereza: Ukuboza-25-2023