Kev puas tsuaj theem ntawm electrothermal oxide zaj duab xis:

Kev cuam tshuam ntawm hluav taws xob cua sov alloy ntsiab ntawm oxidation kuj

Kev puas tsuaj theem ntawm electrothermal oxide zaj duab xis:

Hauv nickel-chromium thiab nickel-chromium-hlau hluav taws xob cua sov alloys, cov ntsiab lus uas txhim kho oxidation kuj yog chromium thiab silicon. Cov npib tsib xee, hlau, manganese, carbon, thiab lwm yam nyob rau hauv lub alloy muaj ib tug unfavorable nyhuv ntawm high-kub oxidation kuj. Cov kab kawm lanthanum, cerium, Tsis tshua muaj ntiaj teb cov ntsiab lus xws li yttrium tuaj yeem txhim kho oxidation tsis kam ntawm cov hlau.

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 oxide zaj duab xis 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. Cov oxidation tus nqi ntawm cov hlau yuav txo qis thaum cov ntsiab lus chromium nce. Kev sib raug zoo ntawm cov ntsiab lus chromium, kub thiab oxidation tus nqi hauv Fe-Cr system yog qhia 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 .

Thaum cov oxidation sab hauv ntawm cov alloy nce mus rau ib qho kev txwv, oxide zaj duab xis pib tawg. Cov tsos ntawm cov kab nrib pleb ua rau cov pa oxygen nkag mus rau hauv cov hlau loj, thiab ntau cov hlau, txhuas, silicon, chromium, thiab lwm yam yog oxidized, uas txhawb kev nce ceev ntawm oxidation. Nyob rau tib lub sijhawm, ntau cov kab nrib pleb pib tshwm hauv cov yeeb yaj kiab oxide, uas thaum kawg ua rau kev puas tsuaj.

Hauv luv luv, cov txheej txheem oxidation ntawm hluav taws xob cua sov alloy qhia txog kev puas tsuaj ntawm cov hluav taws xob cua sov. Yuav ua li cas los tsim kom muaj kev tiv thaiv oxide zaj duab xis thiab txhim kho oxidation stability theem ntawm cov hlau alloy yog qhov tseem ceeb heev rau kev ncua kev pab cuam lub neej ntawm electrothermal alloy.

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