Cov yeeb nkab stainless hlau tam sim no siv ntau dua thiab ntau dua, vim nws qhov kev tiv thaiv corrosion zoo tau ua lub luag haujlwm tseem ceeb hauv kev tsim kho engineering, thaum lub sijhawm tsim khoom peb xav tau cov tshuaj zoo rau kev ua cov yeeb nkab stainless hlau, lub hom phiaj tseem ceeb yog kom tau txais qee yam martensite los ua kom cov khoom tawv, cia peb saib cov tshuaj ntawm kev ua cov yeeb nkab stainless hlau:
(1) Tom qab kev kho cov kua, nws raug cua sov rau (760 ± 15) ℃, thiab cov ntsiab lus ntawm cov pa roj carbon thiab cov khoom sib xyaw hauv cov kav hlau austenitic 904L stainless hlau raug txo vim yog cov nag ntawm Cr23C6 carbide los ntawm cov kav hlau austenitic 904L stainless hlau rau 90 feeb, yog li ntawd Ms point raug tsa mus rau 70 ℃ thiab tom qab ntawd txias rau chav tsev kub kom tau txais martensite + αferrite + cov qauv austenitic seem. Cov austenite seem tau decomposed los ntawm kev laus ntawm 510 ℃.
(2) tom qab kev kho qhov kub siab thiab kev kho mob cryogenic, cov tshuaj tau raug cua sov ua ntej rau 950 ℃ thiab tuav rau 90 feeb. Vim yog qhov nce ntawm Ms point, me me ntawm martensite tuaj yeem tau txais tom qab txias rau chav tsev kub. Tom qab ntawd, qee qhov ntawm martensite tuaj yeem tau txais los ntawm -70 ℃ kev kho mob txias thiab tuav rau 8 teev.
(3) Tom qab kev kho cov tshuaj los ntawm txoj kev hloov pauv txias, cov martensite tsim los ntawm 904L seamless raj yog txias deformed ntawm chav tsev kub. Qhov ntau ntawm martensite tsim los ntawm 904L seamless raj thaum lub sijhawm hloov pauv txias yog cuam tshuam nrog qhov ntau ntawm deformation thiab cov khoom sib xyaw ntawm 904L stainless hlau raj.
Peb txoj kev saum toj no feem ntau yog siv cov yeeb nkab hlau tsis xeb uas muaj kev daws teeb meem vam tias yuav coj kev pab rau koj.
Lub sijhawm tshaj tawm: Lub Ib Hlis-29-2023