Oxidation yam ntxwv ntawm hluav taws xob cua sov hlau chromium aluminium alloy
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Oxidation yam ntxwv ntawm hluav taws xob cua sov hlau chromium aluminium alloy
Hauv cov hlau-chromium-aluminium hluav taws xob cua sov alloy, cov ntsiab lus uas tuaj yeem txhim kho oxidation kev ua tau zoo yog aluminium thiab chromium, thiab lub luag haujlwm ntawm txhuas yog qhov tseem ceeb. Thaum cov hlau yog kub, qhov ntom ntom Al2O3 oxide zaj duab xis yog tsim rau saum npoo, uas tuaj yeem txo cov oxidation ntawm cov hlau. Kev sib xyaw ua ke ntawm Al2O3 oxide zaj duab xis thiab lub hauv paus alloy yog qhov zoo tshaj plaws tiv thaiv oxide zaj duab xis. Yog li ntawd, hlau-chromium-aluminium alloys muaj oxidation zoo dua li nickel-chromium thiab nickel-chromium-hlau alloys.
Kev tshuaj xyuas cov tshuaj tiv thaiv oxidation ntawm cov hlau-chromium-aluminium hluav taws xob cua sov alloys qhia tau hais tias muaj pes tsawg leeg ntawm oxide zaj duab xis hloov nrog kub. Hauv qab 700 degree, nws yog tsim los ntawm Al2O3, Cr2O3, thiab Fe2O3. Tshaj 700 degree, cov ntsiab lus ntawm Al2O3 nce nrog qhov nce ntawm qhov kub thiab txias. Nws yog tag nrho cov tsim ntawm Al2O3, thiab Cr2O3 thiab Fe2O3 raug txo raws li. Cov nyhuv tiv thaiv ntawm oxide zaj duab xis nce nrog qhov nce ntawm Al2O3 cov ntsiab lus.
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 manganese hauv cov hlau 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.
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