Kev tsim khoom 1000MPaCP tus qauv txias dov steel annealing lub voj voog yog rov ua kom sov rau qhov kub thiab txias ntawm qhov chaw tseem ceeb, tom qab ntawd txias thiab khaws cia ntawm li 400 isothermal deg.] C, saum toj no lub martensite pib kub (Ms).

1. Qhov ntim feem pua ​​​​ntawm ferrite thiab carbon cov ntsiab lus cheeb tsam uas yog qhov tseem ceeb annealing kub thiab lub sij hawm tswj.Thaum lub caij txias thiab rwb thaiv tsev, ib feem ntawm thaj av tseem ceeb austenite rau hauv bainite.

2. Austenite rau hauv bainite ntim, ntawm isothermal bainite transformation kub thiab txiav txim siab lub sij hawm thiab C cov ntsiab lus nyob rau hauv austenite thiab bainite pib kub (ntawm Bs) rau TI muaj nuj nqi.Ua raws li kev ua kom txias rau chav sov hauv cov txheej txheem, tsim cov martensite, tab sis qee qhov yuav ua rau muaj kev hloov pauv ntawm austenitic.

3. Ua ntej dip nto 0.3% Cr thiab 0.5% Cr steels nrog XPS.Tsis tas li ntawd peb tau kawm txog qhov cuam tshuam ntawm ob thiab ob hom kev sib txuas ntawm qhov cub annealing kub dew point.

4. 304 seamless stainless hlau alloying ntsiab Si, Mn thiab Cr ntawm qis qis taw tes cais rau saum npoo los tsim cov oxide.Nyob rau hauv ob qho tib si annealing kub, tib qhov chaw muaj pes tsawg leeg.Qhov kub sib txawv yog me me, yog li ntawd qhov sib cais ntawm cov ntsiab lus alloying tsis muaj qhov cuam tshuam loj heev.

5. Cov ntsiab lus Cr yog 0.3%, Cr tus nqi tsawg dua ntawm qhov chaw, tab sis tsis muaj kev cuam tshuam rau lwm yam.Nyob rau hauv Cr2p3 ncov lub zog lub hauv paus, Cr nyob rau hauv daim ntawv ntawm Cr2O3 tshwm nyob rau saum npoo.