Chromium thiab Molybdenum hauv Nickel-raws li Alloys - Kev Paub

1. Core Matrix Cheebtsam

Ob hom alloys cojnpib tsib xee (Ni)Raws li lub hauv paus ntsiab lus, suav txog qhov feem ntau tshaj (feem ntau tshaj 50%) kom ntseeg tau zoo heev corrosion kuj, oxidation tsis kam, thiab siab - kub stability. Txawm li cas los xij, muaj qhov sib txawv hauv kev sib piv ntawm matrix alloying ntsiab:

Kev daws -nickel hardening-raws li alloys

Lub matrix feem ntau yog txhawb los ntawmcov ntsiab lus daws teeb meem nrog siab solubility hauv nickel, xws li chromium (Cr), hlau (Fe), molybdenum (Mo), thiab tungsten (W). Cov ntsiab lus no zoo sib xws hauv nickel-raws li lub ntsej muag-centered cubic (FCC) lattice los ua ib qho -phase solid solution. Cov ntsiab lus ntawm txhua lub ntsiab lus yog tswj nyob rau hauv qhov ntau ntawm cov khoom solubility, thiab tsis muaj qhov thib ob -theem precipitates yuav raug tsim tawm thaum kho cua sov lossis kev pabcuam. Piv txwv li, Alloy 600 muaj li ntawm 72% Ni, 15.5% Cr, thiab 8% Fe, tsis muaj zog los nag- tsim cov ntsiab lus.

Dej nag-nickel hardening-raws li alloys

Raws li lub hauv paus ntawm nickel-chromium- molybdenum matrix, ib qho nyiaj ntawmnag lossis daus- tsim cov ntsiab lus uas tsis tshua muaj solubility hauv nickeltau ntxiv. Cov ntsiab lus no tuaj yeem tsim cov sib txuas sib txuas hauv nruab nrab ntawm qhov kub thiab txias, uas yog lub hauv paus ntawm kev ua kom muaj zog los nag. Cov ntsiab lus matrix (Cr, Mo, W) tsis yog tsuas yog ua si lub luag haujlwm ntawm kev txhim kho lub zog, tab sis kuj tseem pab txhim kho cov theem precipitated.

2. Cov ntsiab lus tseem ceeb ntawm Alloying Elements

Qhov sib txawv tseem ceeb hauv kev sib xyaw yog nyob rau hauv qhov sib ntxiv ntawm nag lossis daus- tsim cov ntsiab lus hauv nag lossis daus- cov alloys hardening, uas tsis muaj lossis tsuas yog muaj nyob rau hauv cov lej hauv cov tshuaj - hardening alloys:

Qeb	Los nag-Nickel hardening-raws li Alloys	Kev daws teeb meem - hardening Nickel-raws li Alloys
Cov dej nag- tsim cov ntsiab lus	Muaj cov ntsiab lus siab -aluminium (Al), titanium (Ti), thiab qee zaumniobium (Nb)thiabtantalum (Ta). Tag nrho cov ntsiab lus ntawm Al thiab Ti yog feem ntau 1.5% -6%. Cov ntsiab lus no hnov ntxhiab nrog npib tsib xee los tsim cov khoom sib txuas sib txuasNi₃(Al,Ti)(hu ua 'phase) los yogNi₃ Nb(hu ua 'theem). Piv txwv li, Inconel 718 muaj txog 0.5% Al, 1.0% Ti, thiab 5.0% Nb, nrog 'theem raws li lub ntsiab txhawb zog theem.	Yuav luag tsis muaj Al thiab Ti ntxiv, lossis cov ntsiab lus tsawg dua 0.5%. Tsis muaj cov ntsiab lus uas tuaj yeem tsim cov txheej txheem ua kom muaj zog loj heev.
Solid tov ntxiv dag zog rau cov ntsiab lus	Muaj Cr (10% - 20%), Mo (2% - 10%), W (0% - 5%) raws li cov khoom siv ntxiv dag zog, uas yog yaj hauv matrix los txhim kho lub zog ntawm matrix thaum ua kom muaj kev tiv thaiv corrosion.	Muaj cov siab -cov ntsiab lus Cr (15%–30%), Mo (5%–15%), W (0%–10%) ua cov ntsiab lus ntxiv dag zog, uas tso siab rau cov lattice distortion tshwm sim los ntawm kev daws teeb meem los txhim kho lub zog.
Cov ntsiab lus pab	Tej zaum yuav ntxiv me me ntawmcarbon (C)los tsim cov theem carbide (xws li TiC, NbC) los ua kom cov nplej zom; ntxivboron (B)thiabzirconium (Zr)los txhim kho grain ciam zog.	Ntxiv ib qho me me ntawm C los ua M₂₃C₆ carbides kom ruaj khov ciam teb; tsis muaj B lossis Zr ntxiv feem ntau, vim tias tsis tas yuav txhim kho lub zog sib txuas ntawm cov qoob loo ciam teb rau siab - qhov kub thiab txias.

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3. Element Content Control Logic

Raunag lossis daus- hardening alloys, cov ntsiab lus piv ntawm Al/Ti thiab tag nrho cov nag lossis daus -cov ntsiab lus yuav tsum tau tswj nruj me ntsis. Cov ntsiab lus ntau dhau yuav ua rau kev tsim cov theem nkig (xws li σ theem, Laves theem) thiab txo qhov toughness ntawm alloy; Cov ntsiab lus tsis txaus tsis tuaj yeem tsim cov theem kom muaj zog txaus, ua rau muaj zog tsawg.

Rautov-cov alloys hardening, cov ntsiab lus ntawm cov ntsiab lus ntawm cov khoom daws teeb meem feem ntau yog txwv los ntawm kev txwv solubility. Lub hom phiaj yog txhawm rau ua kom tiav cov kev daws teeb meem ntxiv dag zog rau lub hauv paus ntawm kev ua kom ntseeg tau tias cov hlau tseem nyob ib leeg -theem qauv ntawm txhua qhov kev pabcuam kub, zam cov nag lossis daus ntawm cov theem uas ua rau kev ua haujlwm tsis zoo.

Chromium thiab Molybdenum hauv Nickel{0}}raws li Alloys

1. Core Matrix Cheebtsam

2. Cov ntsiab lus tseem ceeb ntawm Alloying Elements

3. Element Content Control Logic