1.Cov ntsiab lus tseem ceeb ntawm cov xwm txheej Annealed
Kev kho cua sov
Cov txheej txheem annealing feem ntau suav nrog cua sov cov hlau mus rau qhov kub ntawm 925-1150℃(1700-2100℃F), tuav nws ntawm qhov kub no rau lub sijhawm txaus (feem ntau 30-120 feeb, nyob ntawm cov khoom tuab thiab daim ntawv) kom ntseeg tau tias cov microstructure tsis sib xws, ua raws li kev ua kom txias sai (cua txias lossis dej quenching). Cov kauj ruam ua kom txias sai no yog qhov tseem ceeb- nws tiv thaiv cov nag lossis daus ntawm nkig intermetallic theem (piv txwv li, σ theem) thiab carbides raws cov ciam teb, uas tuaj yeem degrade cov alloy lub toughness thiab corrosion kuj.
Microstructure yam ntxwv
Tom qab annealing, Inconel 625 nthuav tawm ib homogeneous austenitic microstructure nrog ib tug me me ntawm uniformly dispersed niobium carbides (NbC) thiab titanium carbides (TiC). Qhov tsis muaj qhov loj, ua rau muaj kev puas tsuaj ua kom cov hlau ua tiav qhov kev pom zoo ntawm cov khoom siv kho tshuab, suav nrog kev ua haujlwm siab, zoo toughness, thiab zoo corrosion kuj, uas yog ib qho tseem ceeb rau kev ua haujlwm tom ntej (xws li, sib sau, vuam, machining) thiab xaus - daim ntawv thov kev pab.
Variations rau cov ntawv tshwj xeeb cov khoom
Rau daim ntawv, phaj, thiab sawb: Cov mob annealed yog ntxiv raws li "annealed thiab descaled" los yog "annealed, descaled, thiab pickled" kom tshem tawm cov oxides thiab cov kab mob, kom muaj ib tug huv si rau fabrication.
Rau cov khoom siv wrought (bars, rods, xov hlau): Annealing yog ua raws li kev ncaj thiab txias kom ua tau raws li qhov yuav tsum tau ua kom ntev ntev.
Rau castings: Cov txheej txheem xa khoom feem ntau yog "raws li -cast and solution annealed" kom tshem tawm qhov tsis xws luag casting (piv txwv li, porosity) thiab kho cov qauv nplej.
2.Rationale rau Annealing raws li tus qauv xwm txheej
Tsis zoo li nag lossis daus -nickel hardened-raws li alloys (piv txwv li, Inconel 718), Inconel 625 feem ntau yog ntxiv dag zog los ntawm cov tshuaj tiv thaiv ntxiv zog (los ntawm Mo thiab Nb) es tsis yog nag lossis daus ntawm intermetallic theem. Annealing maximizes lub alloy lub formability thiab xyuas kom meej kev ua tau zoo nyob rau hauv sib txawv batch, ua rau nws haum rau ntau yam fabrication txheej txheem thiab kev pab cuam ib puag ncig.
