Dab tsi txwv yog muab tso rau ntawm impurity ntsiab xws li sulfur (S) thiab phosphorus (P) hauv Inconel 625?
Inconel 625 yog ib qho siab -purity, corrosion{2}}resistant superalloy, yog li cov lus qhia feem ntau tso cov kev txwv nruj rau cov impurities xws li S thiab P kom ntseeg tau zoo ductility, toughness, weldability, thiab tsis kam mus rau embrittlement thiab intergranular nres.
1.Cov kev txwv tsis pub muaj (ntau dhau ntawm cov qauv tshwj xeeb, xws li ASTM B443 / B444, ASME SB-443 / SB-444, thiab zoo sib xws):
Sulfur (S): Tsawg dua lossis sib npaug li 0.015% (feem ntau teev tias Tsawg dua lossis sib npaug li 0.010% hauv kev xyaum ua kom zoo dua kub ua haujlwm thiab weldability)
Phosphorus (P): Tsawg dua lossis sib npaug rau 0.015%
2.Rationale rau cov kev txwv no:
Sulfur (S):
S muaj lub siab xav ua kom qis -melting-point sulfides (piv txwv li, NiS, FeS) uas tuaj yeem sib cais ntawm cov ciam teb.
Cov sulfides no ua rau muaj kev pheej hmoo ntawm kub tawg thaum vuam thiab ua haujlwm kub.
S kuj tseem tuaj yeem ua rau cov ductility, toughness, thiab qaug zog kev ua tau zoo, thiab tej zaum yuav txhawb sulphidation nyob rau hauv tej qhov chaw siab - kub.
Yog li ntawd, ua kom S qis yog qhov tseem ceeb rau weldability thiab tag nrho cov neeg kho tshuab kev ntseeg tau.
Phosphorus (P):
P yog ib qho zoo -paub embrittling impurity uas cais rau cov ciam teb nplej, txo cov kev sib koom ua ke.
Kev nce qib P tuaj yeem txo qhov cuam tshuam rau lub zog, ua rau muaj kev cuam tshuam rau intergranular corrosion, thiab txhawb kev tawg los yog embrittlement hauv qee yam mob.
Nyob rau hauv npib tsib xee-raws li alloys, P kuj yog txuam nrog txo tsis kam mus rau tej yam ntaub ntawv ntawm ib puag ncig embrittlement.
Li no, P yog nruj tswj xyuas kom muaj zog thiab corrosion kuj.
Cov kev txwv tseeb yuav txawv me ntsis ntawm cov kev qhia tshwj xeeb, cov ntaub ntawv cov khoom (daim ntawv, phaj, bar, hlau, forgings, weld muab tub lim), thiab cov neeg yuav khoom- cov kev xav tau tshwj xeeb ntxiv. Rau cov ntawv thov tseem ceeb (piv txwv li, nuclear, aerospace, lossis kev pabcuam corrosive heev), txawm tias kev tswj tsis huv yuav raug txwv los ntawm kev txwv cov khoom siv ntxiv.
