Stabilizing interstitial ntsiab kom tiv thaiv intergranular corrosion
Titanium muaj kev sib raug zoo rau cov pa roj carbon ntau dua li chromium. Nyob rau hauv tus txheej txheem ntawm smelting, kev kho cua sov thiab kev pab cuam ntawm Incoloy 825, titanium nyiam ua ke nrog cov dawb carbon nyob rau hauv lub alloy los tsim nplua thiab dispersed titanium carbide (TiC) precipitates. Cov tshuaj tiv thaiv no zoo zam kev tsim cov chromium carbide (Cr₂₃C₆) ntawm cov ciam teb. Yog tias chromium carbides precipitate ntau dhau ntawm cov ciam teb, lawv yuav ua rau muaj kev txo qis hauv chromium cov ntsiab lus hauv cov matrix uas nyob ib sab (piv txwv li,chromium depletion tsam), ua rau cov ciam teb poob corrosion kuj thiab ua rau hnyav intergranular corrosion. Yog li ntawd, titanium ua raws li ib tugcarbide stabilizertxhawm rau txhim kho qhov sib xyaw ua ke ntawm cov tshuaj tiv thaiv ntawm Incoloy 825, tshwj xeeb tshaj yog nyob rau hauv corrosive media xws li sulfuric acid, phosphoric acid thiab chloride daws.
Refining nplej thiab txhim kho mechanical zog
Lub titanium carbide precipitated thaum lub sij hawm solidification thiab kub kho ntawm cov hlau yuav ua raws li heterogeneous nucleation qhov chaw nyob rau hauv lub grain loj hlob txheej txheem. Cov TiC me me no pin cov ciam teb nplej thiab cuam tshuam kev tsiv teb tsaws ntawm cov ciam teb, yog li ua kom zoo dua cov nplej loj ntawm Incoloy 825. Zoo-grained qauv tsis tsuas yog txhim kho chav tsev- kub tensile lub zog, yield zog thiab toughness ntawm cov hlau, tab sis kuj txhim kho nws cov kev ua tau zoo ntawm qhov nruab nrab ntawm qhov kub thiab txias. ntawm lub alloy nyob rau hauv load tej yam kev mob.
Txhim kho corrosion kuj nyob rau hauv tej xov xwm
Titanium can promote the formation of a more dense and stable passive film on the surface of Incoloy 825. The passive film is mainly composed of chromium oxides, and the participation of titanium oxides can improve the adhesion and compactness of the film, making it difficult for corrosive ions (such as Cl⁻, SO₄²⁻) to penetrate the film and corrode the matrix. Cov yam ntxwv no yog qhov tseem ceeb tshwj xeeb rau Incoloy 825 los tiv thaiv pitting corrosion thiab crevice corrosion nyob rau hauv chloride - muaj ib puag ncig, uas nthuav dav daim ntawv thov ntawm cov hlau nyob rau hauv marine, tshuaj thiab roj thiab roj industries.
Pab hauv nag lossis daus ntxiv (lub luag haujlwm thib ob)
Txawm hais tias Incoloy 825 tsis yog nag lossis daus- tawv superalloy zoo li Inconel 718, ib qho me me ntawm titanium tseem tuaj yeem txhawb cov nag lossis daus ntawm cov kab sib txuas (xws li Ni₃Ti) hauv matrix raws li qee qhov kev kho cua sov. Cov me me precipitates tuaj yeem ua lub luag haujlwm tsis muaj zog pinning ntawm dislocations, ntxiv txhim kho lub zog ntawm cov hlau tsis muaj qhov txo qis nws qhov toughness thiab corrosion kuj.
