Lub luag haujlwm ntawm Cov Khoom Txhuas Txhuas, Molybdenum, thiab Niobium Elements hauv Hlau Chromium Txhuas Cov Hlau Hluav Taws Xob
Tso lus
Hlau chromium txhuas hluav taws xob cua sov xov hlau yog tsim los ntawm hlau (Fe), chromium (Cr), thiab txhuas (Al) cov ntsiab lus, thiab ntxiv rau, molybdenum (Mo) lossis niobium (Nb) cov ntsiab lus tau ntxiv kom tau raws li qee qhov kev xav tau. Feem ntau, cov ntsiab lus ntawm Cr yog 12 feem pua rau 3 0 feem pua, Al element yog 4 feem pua rau 8 feem pua, thiab tus so yog Fe, uas yog nyob rau hauv ib tug ferrite qauv. Raws li kev muaj pes tsawg leeg, nws tau muab faib ua 1Cr13Al4, {{10}}Cr25Al5, 0Cr21Al6, 0Cr23Al5, 0Cr21Al6Nb, 0Cr27Al7Mo2, thiab lwm yam. Cov hauv qab no yuav qhia txog cov haujlwm ntawm aluminium, molybdenum, thiab niobium cov ntsiab lus hauv hlau chromium txhuas hluav taws xob rauv hlau.
1, Lub luag hauj lwm ntawm txhuas (Al) nyob rau hauv alloys
Aluminium yog tsuas yog siv rau deoxidation thiab grain refinement. Txhawb kev tsim cov txheej txheem nyuaj thiab corrosion-resistant nitrided hauv nitrided alloys. Aluminium tuaj yeem tiv thaiv kev laus ntawm cov pa roj carbon tsawg thiab txhim kho lawv cov tawv nqaij ntawm qhov kub thiab txias. Thaum cov ntsiab lus siab, nws tuaj yeem txhim kho oxidation tsis kam thiab corrosion kuj ntawm cov hlau hauv oxidizing acids thiab H2S roj, thiab tuaj yeem txhim kho cov khoom siv hluav taws xob thiab sib nqus ntawm cov hlau. Aluminium muaj cov txiaj ntsig tseem ceeb ntawm cov tshuaj tiv thaiv ntxiv dag zog hauv cov alloys, txhim kho lawv cov hnav tsis kam, qaug zog lub zog, thiab cov khoom siv kho tshuab tseem ceeb.
Nyob rau hauv tshav kub-resistant alloys, aluminium tsim ib tug compound nrog npib tsib xee, yog li txhim kho thermal zog. Hlau chromium aluminium alloy uas muaj txhuas muaj cov khoom nyob ze rau qhov ua haujlwm tsis tu ncua thiab oxidation zoo heev ntawm qhov kub thiab txias. Haum rau kev ua hluav taws xob cua sov alloy cov ntaub ntawv, xws li hlau chromium aluminium cua sov xov hlau.
(1) Cov nyhuv ntawm microstructure thiab kev kho cua sov ntawm cov hlau
A. Aluminium muaj qhov muaj zog affinity rau oxygen thiab nitrogen, ua rau nws deoxygenation thiab nitrogen kho tus neeg sawv cev rau alloy smelting
B. Aluminium muaj zog txo qhov austenite theem cheeb tsam hauv alloys
C. Aluminium thiab cov pa roj carbon monoxide muaj qhov tsis sib xws, thiab aluminium carbides feem ntau tsis tshwm sim hauv cov alloys. Aluminium muaj zog txhawb lub graphitization ntawm carbon, thiab ntxiv cov muaj zog carbides xws li Cr, Ti, V, Nb los tsim cov ntsiab yuav inhibit graphitization ntawm Al
D. Aluminium refines qhov tseem ceeb grain ntawm cov hlau thiab tsub kom lub coarsening kub ntawm lub alloy grain. Txawm li cas los xij, thaum cov ntsiab lus txhuas ntawm cov khoom siv hlau hauv cov hlau alloy ntau tshaj li ib qho nyiaj, cov austenite grain yog ib qho yooj yim kom loj hlob thiab coarsen E. Aluminium tsub kom lub martensite taw tes Ms ntawm cov alloy thiab txo cov seem austenite cov ntsiab lus tom qab quenching, uas yog. rov qab rau lwm cov ntsiab lus alloy tshwj tsis yog cobalt hauv qhov kev hwm no
(2) Cov nyhuv ntawm cov khoom siv kho tshuab ntawm alloys
A. Aluminium txo qhov rhiab heev ntawm cov alloys mus rau notches, txo los yog tshem tawm cov laus tshwm sim ntawm cov alloy, tshwj xeeb tshaj yog txo cov nkig hloov kub ntawm cov alloy, thiab txhim kho lub toughness ntawm alloy nyob rau hauv qis kub.
B. Aluminium muaj ib qho tseem ceeb ntawm cov tshuaj ntxiv dag zog rau cov nyhuv, thiab siab aluminium alloys muaj qhov zoo ntawm lub zog tshwj xeeb. Ferritic hlau aluminium alloys muaj qhov kub thiab txias zog ntau dua li Cr13 alloys, tab sis lawv cov chav sov plasticity thiab toughness tsawg, ua rau txias deformation ua nyuaj.
C. Austenitized austenite hom hlau aluminium manganese alloy nrog carbon thiab manganese muaj cov khoom zoo dua
(3) Cov nyhuv ntawm lub cev, tshuaj lom neeg, thiab cov txheej txheem ntawm alloys
A. Thaum ntxiv rau Fe-Cr alloy hluav taws xob cua sov xov hlau uas muaj 20 feem pua -30 feem pua Cr, lawv cov coefficient kub tsis kam yog tsawg heev, yog li lawv tuaj yeem siv los ua cov khoom siv hluav taws xob cua sov.
B. Aluminium thiab silicon muaj cov txiaj ntsig zoo sib xws hauv kev txo cov tub ntxhais poob ntawm transformer alloys. Cov nqi sib txawv ntawm txhuas muaj qhov tshwj xeeb thiab nyuaj rau kev coercivity thiab hysteresis poob
C. Thaum cov ntsiab lus aluminium nce mus txog ib qho nqi,
