Impurity Element Cov ntsiab lus txwv thiab yam tsawg kawg nkaus nickel cov ntsiab lus xav tau rau Monel K500
1. Cov ntsiab lus txwv rau impurity Elements hauv Monel K500
Hlau (Fe): Tsawg dua lossis sib npaug li 2.0% (los ntawm qhov hnyav)
Hlau yog qhov impurity tshaj plaws hauv Monel K500. Cov ntsiab lus ntawm cov hlau tswj tau pab txhim kho cov hlau casting thiab vuam kev ua tau zoo, tab sis cov hlau ntau dhau yuav txo qhov compactness ntawm nickel- tooj liab passive zaj duab xis, ua rau nws tsis muaj zog chloride pitting thiab crevice corrosion nyob rau hauv marine ib puag ncig.
Manganese (Mn): Tsawg dua lossis sib npaug li 1.5% (los ntawm qhov hnyav)
Manganese ua raws li cov deoxidizer thaum lub sij hawm alloy smelting, tab sis siab manganese cov ntsiab lus yuav tsim nkig intermetallic tebchaw, uas yuav txo tau cov alloy lub toughness thiab qaug zog zog -ib qho teeb meem tshwj xeeb tshaj yog rau aerospace Cheebtsam raug rau cyclic loads.
Silicon (Si): Tsawg dua lossis sib npaug li 0.5% (los ntawm qhov hnyav)
Silicon yog qhia ua tus neeg sawv cev deoxidizing hauv cov txheej txheem tsim khoom. Silicon ntau dhau yuav ua rau kom muaj qhov brittleness ntawm cov alloy cov ciam teb, ua rau intergranular tawg thaum kho cua sov los yog vuam.
Cov pa roj carbon (C): Tsawg dua lossis sib npaug li 0.25% (los ntawm qhov hnyav)
Raws li tau hais ua ntej, carbon yog ib qho kev txwv nruj me ntsis. Tshaj carbon precipitates raws li carbides ntawm grain ciam teb, ua rau intergranular corrosion thiab txo cov hlau ductility. Rau siab- kev ua tau zoo (xws li, sib sib zog nqus- cov khoom siv hauv hiav txwv, aerospace fasteners), cov tuam txhab feem ntau tswj cov ntsiab lus carbon rauTsawg dua lossis sib npaug li 0.10%rau txhim khu kev ntseeg.
Sulfur (S): Tsawg dua lossis sib npaug li 0.015% (los ntawm qhov hnyav)
Sulfur yog ib qho teeb meem impurity uas tsim tsawg -sulphide inclusions. Cov kev suav nrog no ua raws li cov ntsiab lus kev ntxhov siab, txo cov hlau ua haujlwm kub thiab tiv thaiv corrosion, thiab ua rau muaj kev pheej hmoo ntawm kev tawg thaum lub sij hawm forging los yog dov.
Phosphorus (P): Tsawg dua lossis sib npaug li 0.03% (los ntawm qhov hnyav)
Tshaj phosphorus tuaj yeem ua rau muaj kev sib cais ntawm cov ciam teb, ua rau cov hlau tsis muaj zog thiab corrosion kuj nyob rau hauv acidic ib puag ncig.
2. Yam tsawg kawg nkaus nickel ntsiab lus rau Monel K500
Guaranteeing corrosion kuj: Nickel yog cov khoom tseem ceeb tsim cov nickel ntom ntom - tooj liab oxide passive zaj duab xis. Cov ntsiab lus npib tsib xee tsawg kawg yog 63% ua kom cov yeeb yaj kiab muaj kev ncaj ncees thiab tsis tshua muaj chloride permeability, ua rau cov hlau tiv thaiv pitting hauv siab -chloride ib puag ncig xws li dej hiav txwv.
Txhawb nag lossis daus hardening: Nickel muab cov matrix rau kev tsim covNi₃(Al,Ti)ntxiv dag zog rau theem thaum laus kho. Cov ntsiab lus npib tsib xee txaus ua kom cov dej nag tsis sib haum ntawm theem no, uas yog qhov tseem ceeb rau kev ua tiav cov alloy siab tensile lub zog (txog 1,034 MPa) thiab qaug zog.
Kev ruaj ntseg ruaj ntseg: Cov npib tsib xee- tooj liab piv (nrog npib tsib xee Ntau dua lossis sib npaug li 63%) ua kom cov hlau ib leeg -theem austenitic microstructure nyob rau hauv chav tsev kub, zam qhov tsim ntawm nkig theem uas yuav txo tau ductility thiab cuam tshuam toughness.
