Dab tsi steel yog kub resistant?
Muaj ntau hom hlau, tab sis lawv cov haujlwm tsis zoo ib yam.
Feem ntau, peb xa mus rau high-temperature steel li "heat-resistant steel". Thaum tshav kub kub-resistant steel yog hais txog ib chav kawm ntawm cov hlau uas muaj oxidation tsis kam thiab txaus siab kub-kub lub zog thiab zoo heev kub kuj nyob rau hauv high kub tej yam kev mob. Tuam Tshoj pib tsim cov hlau tsis muaj cua sov hauv xyoo 1952.
Thaum tshav kub kub-resistant steel feem ntau yog siv nyob rau hauv kev tsim khoom ntawm cov khoom ua haujlwm ntawm qhov kub thiab txias hauv boilers, chav turbines, fais fab machinery, industrial furnaces thiab industrial sectors xws li aviation thiab petrochemical industries. Ntxiv nrog rau qhov kub thiab txias lub zog thiab tsis kam mus rau qhov kub thiab txias oxidative corrosion, cov khoom no kuj xav tau kev ua haujlwm zoo, kev ua haujlwm zoo thiab kev sib txuas, thiab qee yam kev ruaj ntseg raws li kev siv sib txawv.
Thaum tshav kub kub-resistant steel yuav muab faib ua ob hom raws li nws muaj nuj nqi: anti-oxidation steel thiab tshav kub-resistant steel. Anti-oxidation steel tseem hu ua daim tawv nqaij hlau luv luv. Kub-lub zog steel yog hais txog cov hlau uas muaj oxidation tsis kam ntawm qhov kub thiab txias thiab muaj zog kub.
Thaum tshav kub kub-resistant steel yuav muab faib ua austenitic tshav kub-resistant steel, martensitic tshav kub-resistant steel, ferritic tshav kub-resistant steel thiab pearlite tshav kub-resistant steel raws li nws normalizing kev npaj.
Austenitic heat-resistant steel muaj ntau cov khoom siv austenite xws li npib tsib xee, manganese, thiab nitrogen. Thaum nws siab tshaj 600 ℃, nws muaj qhov kub thiab txias zog thiab kev ruaj ntseg, thiab muaj kev ua haujlwm zoo heev. Nws yog feem ntau siv saum 600 ℃ Thaum tshav kub kub siv cov ntaub ntawv ntawm kev ua haujlwm. Martensitic tshav kub-resistant steel feem ntau muaj cov ntsiab lus chromium ntawm 7 mus rau 13%, thiab muaj qhov kub thiab txias zog, oxidation tsis kam thiab dej vapor corrosion kuj qis dua 650 ° C, tab sis nws cov weldability tsis zoo.
Ferritic tshav kub-resistant steel muaj ntau cov ntsiab lus xws li chromium, aluminium, silicon, thiab lwm yam, tsim ib-theem ferrite kev npaj, muaj peev xwm tiv taus oxidation thiab kub gas corrosion, tab sis muaj qhov kub thiab txias zog thiab ntau dua brittleness ntawm chav tsev kub. . , Weldability tsis zoo. Lub pearlite tshav kub-resistant steel alloy ntsiab lus feem ntau yog chromium thiab molybdenum, thiab tag nrho cov nyiaj feem ntau tsis tshaj 5%.
Nws txoj kev nyab xeeb tsis suav nrog pearlite, ferrite, thiab bainite. Cov hlau no muaj lub zog kub zoo heev thiab cov txheej txheem ua haujlwm ntawm 500 ~ 600 ℃, thiab tus nqi qis.
Nws yog dav siv los ua cov khoom kub-resistant hauv qab 600 ℃. Xws li boiler steel kav, turbine impellers, rotors, fasteners, high-pressure hlab ntsha, kav dej, thiab lwm yam.
Post lub sij hawm: Jan-19-2020