Lub luag haujlwm ntawm electrothermal manganese thiab hlau:
Tso lus
Lub luag haujlwm ntawm electrothermal manganese thiab hlau:
Manganese yuav txo cov oxidation tsis kam ntawm cov hlau thiab nce oxidation tus nqi. Thaum kub siab, manganese yuav raug oxidation cov tshuaj tiv thaiv los tsim MnO. Thaum kub siab, MnO tuaj yeem ua ke nrog Cr2O3 los tsim manganese spinel. Thaum manganese spinel muaj nyob rau hauv oxide zaj duab xis, oxidation tus nqi ntawm cov alloy nce sai heev. Manganese spinel kuj tseem txo cov kev sib txuas ntawm cov oxide zaj duab xis thiab lub hauv paus alloy, ua rau cov oxide zaj duab xis yooj yim tev tawm. Yog li, manganese tuaj yeem txo cov oxidation tsis kam ntawm nickel-chromium thiab nickel-chromium hluav taws xob cua sov alloys. Nws yog qhov tsim nyog los txwv cov ntsiab lus ntawm manganese hauv cov alloy saum toj no rau 1.0 feem pua lossis tsawg dua. Txawm li cas los xij, nyob rau hauv cov ntsiab lus siab dua ntawm nickel-chromium thiab nickel-chromium-raws li hlau alloys, cov ntsiab lus manganese tuaj yeem tsim nyog ntxiv.
Lub luag haujlwm ntawm hlau zoo ib yam li cov manganese. Rau cov laj thawj nyiaj txiag, cov tuam ntxhab tseem khaws cov ntsiab lus hlau siab hauv cov nickel-chromium alloys.
Tom qab kub kub oxidation, silicon cov ntaub ntawv SiO2, uas yog faib nyob rau hauv lub interface ntawm oxide zaj duab xis thiab lub hauv paus hlau. SiO2 tuaj yeem cuam tshuam cov pa oxygen infiltration thiab txo cov oxidation tus nqi ntawm cov hlau.
Chromium yog lub hauv paus tseem ceeb los txhim kho qhov kub siab oxidation tsis kam ntawm nickel-chromium thiab nickel-chromium-hlau hluav taws xob cua sov alloys. Kev tiv thaiv oxide zaj duab xis tsim los ntawm cov hlau alloy ntawm qhov kub thiab txias yog tsim los ntawm Cr2O3. Cov yeeb yaj kiab oxide feem ntau yog ua los ntawm Cr2O3 yog denser thiab muaj zog yoog raws, uas tuaj yeem ua kom siv tau ntev ntawm cov hlau ntawm qhov kub thiab txias. Lub oxidation tus nqi ntawm cov alloy txo qis raws li cov ntsiab lus chromium nce. Kev sib raug zoo ntawm chromium cov ntsiab lus, kub thiab oxidation tus nqi nyob rau hauv Fe-Cr system yog qhia nyob rau hauv daim duab 3-2.
Yuav kom tswj tau qhov zoo oxidation tsis kam ntawm hluav taws xob cua sov alloy ntawm qhov kub thiab txias, nws yuav tsum tau oxidation hnyav nce ntawm lub alloy ntawm qhov kub ntawm no tsis ntau tshaj 2.0*10-2g. cm -2.h-1. Raws li tus nqi no, npib tsib xee-chromium thiab npib tsib xee-chromium-hlau hluav taws xob cua sov alloys muaj 15% ~ 18 feem pua, 19 feem pua ~ 23 feem pua thiab 28 feem pua ~31 feem pua ntawm Cr, qhov siab tshaj plaws oxidation kuj kub yog sib xws: 900 ~ 950 degree , 1000 ~ 1100 degree Thiab 1000 ~ 1200 degree .
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