Kev txhim kho oxidation tsis kam ntawm siab -kub alloy steel castings yog ib qho tseem ceeb ntawm kev txhim kho lawv cov kev ua tau zoo thiab kev pab cuam lub neej, thiab qhov no tuaj yeem txav los ntawm ntau lub kaum ntse ntse. Hauv kev tsim cov hlau alloy, qhov sib ntxiv ntawm cov ntsiab lus alloying yog qhov tseem ceeb. Chromium yog ib qho tseem ceeb rau kev txhim kho oxidation tsis kam ntawm hlau alloy; Nws tsim cov ntaub ntawv ntom ntom chromium oxide tiv thaiv zaj duab xis rau ntawm qhov chaw casting, tiv thaiv cov pa oxygen ntxiv rau sab hauv thiab ua kom qeeb ntawm oxidation. Feem ntau, nyob rau hauv ib qho chaw, cov ntsiab lus chromium ntau dua ua rau muaj kev tiv thaiv oxidation zoo dua, tab sis cov ntsiab lus chromium ntau dhau tuaj yeem cuam tshuam rau lwm yam khoom ntawm cov casting, yog li kev ua kom zoo dua yog tsim nyog raws li cov kev cai tshwj xeeb.
Aluminium kuj yog ib qho khoom siv feem ntau siv alloying. Thaum qhov kub thiab txias, txhuas ua ib qho txhuas oxide tiv thaiv zaj duab xis, uas muaj zog ruaj khov thiab oxidation tsis kam. Ntxiv rau qhov tsim nyog ntawm txhuas tuaj yeem txhim kho oxidation tsis kam ntawm castings hauv siab - qhov kub thiab txias. Tsis tas li ntawd, cov ntsiab lus tsis tshua muaj hauv ntiaj teb xws li cerium thiab lanthanum tuaj yeem txhim kho cov qauv thiab cov khoom ntawm oxide zaj duab xis, txhim kho lub zog sib txuas ntawm oxide zaj duab xis thiab cov substrate, thiab txhim kho kev ncaj ncees thiab ruaj khov ntawm cov yeeb yaj kiab oxidation. Nyob rau hauv cov nqe lus ntawm kev tsim cov txheej txheem, optimizing cov txheej txheem casting tuaj yeem txo qhov tsis xws luag hauv qhov casting thiab txhim kho nws qhov ntom, yog li txhim kho oxidation kuj. Siv cov thev naus laus zis siab tshaj plaws, xws li lub tshuab nqus tsev induction melting thiab electroslag remelting, tuaj yeem tshem tawm impurities thiab gases los ntawm cov hlau, txhim kho cov purity ntawm cov hlau, thiab txo qhov pib ntawm oxidation. Kev tswj xyuas tsis meej xws li qhov kub thiab txias thaum lub sij hawm casting txheej txheem tuaj yeem tau txais cov qauv zoo thiab zoo -grained qauv, uas yog qhov tsim nyog rau kev tsim cov oxide zaj duab xis txuas ntxiv thiab ntom ntom. Kev kho deg kuj yog ib txoj hauv kev zoo los txhim kho oxidation tsis kam. Cov txheej txheem xws li thermal spraying thiab tshuaj plating tuaj yeem siv los npaj cov tshuaj tiv thaiv - oxidation txheej rau ntawm qhov chaw casting.
Thermal spray coatings muab ib qho kev tiv thaiv ntxiv, tiv thaiv cov pa oxygen los ntawm kev sib cuag nrog lub substrate; chemical plating coatings tuaj yeem txhim kho cov tshuaj lom neeg ntawm qhov chaw thiab txhim kho oxidation tsis kam. Tsis tas li ntawd, kev kho cua sov uas tsim nyog ntawm cov casting, xws li kev kho kev daws teeb meem thiab kev laus kev kho mob, tuaj yeem kho cov microstructure ntawm cov hlau thiab txhim kho nws cov oxidation tsis kam.
