304 bir ah oo aan fiicneyn oo heerkulka annealing tube on walxaha alloying

Soo saarista 1000MPaCP heerka qabow ee wareegyada birta duuban ee wareegtada ayaa dib loogu kululeeyaa heerkulka annealing ee aagga muhiimka ah, ka dibna la qaboojiyey oo lagu hayaa ilaa 400 isothermal deg.] C, oo ka sarreeya heerkulka bilowga martensite (Ms).

1. Boqolkiiba mugga ferrite iyo aagga ka kooban kaarboonka kaas oo ah heerkulka baab'inta muhiimka ah iyo xakamaynta wakhtiga.Inta lagu jiro qaboojinta iyo dahaarka, qayb ka mid ah gobolka xasaasiga ah waxay austenite gelisaa bainite.

2. Austenite galay mugga bainite, of isothermal bainite heerkulka isbeddelka iyo in la go'aamiyo wakhtiga iyo content C ee austenite iyo bainite heerkulka bilowga (of Bs) ee shaqada TI.Iyadoo la raacayo qaboojinta heerkulka qolka habka, samaynta martensite, laakiin qaar ayaa laga yaabaa inay sii wadaan isbeddelka austenitic.

3. Kahor intaadan daadin Dusha sare 0.3% Cr iyo 0.5% birta Cr oo leh XPS.Waxa kale oo aanu barannay saamaynta laba iyo laba nooc oo foornada ceejisa oo baabi'isa barta sayaxa heerkulka.

4. 304 walxood oo daawaynta birta aan lahayn ee aan lahayn si, Mn iyo Cr ee kala soocida barta sayaxa hoose ee dusha si ay u sameeyaan oksaydh.Labada heerkul-ku-soo-baxa, isku-dhafka dusha sare.Farqiga heerkulka waa mid aad u yar, sidaas darteed kala soocida walxaha alloying ee qadarka wax saameyn ah oo muhiim ah ma laha.

5. Waxa ku jira Cr waa 0.3%, qadarka Cr waa ku yar yahay dusha sare, laakiin wax saamayn ah kuma laha walxaha kale.Cr2p3 saldhigga tamarta ugu sarreysa, Cr oo ah qaabka Cr2O3 ayaa ka muuqda dusha sare.


Waqtiga boostada: Agoosto-26-2019