Duplex stainless hlau ob-theem cua txias txheej txheem

Thaum cov ntsiab lus ntawm cov ntsiab lus alloying hauv cov hlau tsis tshua muaj, qhov txias txias qeeb, thiab cov qauv ntawm ferrite thiab pearlite tau txais. Thaum qhov txias txias yog ceev, cov kua roj carbon monoxide hauv cov ferrite yog siab dua, uas tsis yog qhov tsim nyog los txo cov yield zog thiab txhim kho cov ductility. Qhov kev ua tau zoo ntawm ob-theem steel tuaj yeem txhim kho los ntawm kev siv ob-theem cua txias, uas yog, los ntawm qhov tseem ceeb ntawm thaj chaw cua sov rau qhov kub thiab txias, thiab tom qab ntawd txias txias. Kev txias qeeb tuaj yeem ua kom cov pa roj carbon ntau hauv ferrite mus rau qhov tsis hloov pauv austenite. Kev txias ceev tuaj yeem zam qhov isothermal decomposition ntawm untransformed austenite thiab xyuas kom meej cov qauv biphase thiab cov khoom xav tau. Piv txwv li, 0.08% C-1.4% Mn steel, los ntawm 800℃; Cov khoom siv hluav taws xob cua sov rau cov dej txias yog: σ0.2=365PMa, σb=700MPa, σ0.2/σb=0.52, eu=18%, et=21%. Yog tias siv ob-theem txias txheej txheem, uas yog, ntawm 800℃C; Tom qab cua sov, cua txias rau 600 degree; Thiab tom qab ntawd dej txias, nws qhov kev ua tau zoo yog: σ0.2=280MPa, σb=600MPa, σ0.2/σb=0.47, eu=21%, et =29%. Ob-theem cua txias yuav txo tau lub zog tawm los thiab txhim kho cov ductility ntawm ob-theem steel.