15 chrome-molybdenum lub zog siab steel yeeb nkab yog ib hom ntawm cov yeeb nkab tsis sib haum steel. Nws qhov ua tau yog ntau dua li uas zoo tib yam seamless steel yeeb nkab. Vim tias cov yeeb nkab steel no muaj ntau dua Cr, nws qhov kub tsis kam, qhov kub tsis kam thiab kev tiv thaiv corrosion yog lwm yam tsis muaj kev cuam tshuam. Cov kav hlau tsis sib piv, yog li cov kav dej txuas txhuas yog siv dav hauv roj av, tshuaj lom neeg, hluav taws xob, boiler thiab lwm yam kev lag luam.
Lub hauv paus ntsiab lus ntawm kev lim dej hydrogen los ntawm 15 chrome molybdenum siab siab steel yeeb nkab yog tias thaum cov hydrogen ua kom huv yog qhia rau hauv ib sab ntawm 15 chrome molybdenum steel yeeb nkab ntawm 300-500 ° C, hydrogen yog adsorbed ntawm phab ntsa ntawm 15 chrome molybdenum siab lub zog steel yeeb nkab, vim yog 4d ntawm palladium. Lub txheej txheej hauv hluav taws xob tsis muaj ob lub tshuab hluav taws xob, uas tuaj yeem ua rau cov ntawv pov thawj tshuaj lom uas tsis ruaj khov nrog hydrogen (qhov tshuaj tiv thaiv ntawm palladium thiab hydrogen rov ua tau). Hauv qab qhov kev txiav txim ntawm palladium, hydrogen yog ionized rau protons nrog lub voos xwm txheej ntawm 1.5 × 10 15 m, thaum palladium Lub ntxaij ntoo tas li yog 3.88 × 10-10m (ntawm 20 ° C), yog li nws tuaj yeem hla 15 chrome-molybdenum siab steel leeg. Raws li kev txiav txim siab ntawm palladium, cov protons sib txuas nrog cov khoom siv hluav taws xob thiab rov ua cov qauv hydrogen hydrogen, los ntawm lwm sab ntawm 15 chrome-molybdenum siab-siab steel yeeb nkab. Tawm. Nyob rau saum npoo ntawm 15 chrome-molybdenum lub zog siab steel yeeb, cov roj uas tsis cuam tshuam yog impermeable, yog li high-purity hydrogen tuaj yeem tau los ntawm kev siv 15 chrome-molybdenum lub zog siab steel yeeb. Txawm hais tias palladium muaj qhov tshwj xeeb permeability rau hydrogen, 15 chrome-molybdenum siab lub zog steel yeeb nkab, tab sis cov ntshiab palladium muaj cov khoom tsis zoo, yooj yim oxidation thaum kub, qis recrystallization kub, yooj yim rau deform thiab embrittlement ntawm 15 chrome-molybdenum lub zog siab cov yeeb nkab steel, yog li nws tsis tuaj yeem tsis huv Palladium siv los ua kev tiv thaiv kev puas tsuaj. Ntxiv cov nqi tsim nyog ntawm Pab Pawg IB thiab Pawg VIII cov ntsiab lus rau palladium los tsim palladium alloy tuaj yeem txhim kho cov khoom siv kho tshuab ntawm palladium. 11. Seamless steel tube rau tsheb ib leeg axle casing (GB3088-82) yog siv los tsim lub tsheb thauj tog raj nkoj casing thiab tsav lub pob qag. Nyiaj-siv raws li lub raj hlau tsis sib haum palladium alloy rau cov pa roj carbon zoo cov txheej txheem steel thiab alloy cov txheej txheem steel rau plhaub-hau raj, nyiaj tso nyiaj rau 20-30%, thiab lwm yam khoom siv (xws li kub) cov ntsiab lus <>
