Chromium nyob rau hauv lub alloy ntawm hluav taws xob cua sov alloy

Chromium nyob rau hauv lub alloy ntawm hluav taws xob cua sov alloy

Chromium nyob rau hauv cov hlau yog ib qho tseem ceeb ntawm cov ntaub ntawv carbide, ua raws li cov hlau. Yog li ntawd, raws li cov ntsiab lus ntawm Cr thiab Fe nyob rau hauv lub alloy nce, qhov tsis kam mus carburization txo. Silicon, txhuas thiab npib tsib xee hauv cov hlau tsis yooj yim rau kev tsim cov carbides vim lawv tsis muaj zog affinity rau carbon, uas tuaj yeem txhim kho cov carburization tsis kam ntawm cov hlau. Ntawm cov nickel-chromium thiab npib tsib xee-chromium-hlau alloys, alloys muaj 2 feem pua ​​​​Si muaj cov carburization zoo hauv qab 900 degree, thiab silicon poob nws cov nyhuv ntawm 1000 degree.

Cov ntsiab lus tsis tshua muaj hauv ntiaj teb muaj qhov tsis muaj zog rau cov pa roj carbon monoxide, thiab tib lub sijhawm tuaj yeem txhim kho kev ruaj ntseg thiab compactness ntawm oxide zaj duab xis, yog li nws tuaj yeem txhim kho cov carburization tsis kam ntawm cov hlau. Qhov sib ntxiv ntawm yttrium rau hlau-chromium-aluminium alloy tuaj yeem txhim kho cov carburizing tsis kam.

Kev daws: Ua ntej, koj tuaj yeem tshawb xyuas tus contactor tswj fais fab mov nrog lossis tsis muaj hluav taws xob. Yog tias muaj hluav taws xob lossis tsis ua haujlwm, nws yog qhov teeb meem contactor. Xyuas seb qhov kev sib cuag yog xoob. Tom qab loosening thiab tig tawm lub hwj chim, ceev lub connector nrog ib tug ntswj ntsia hlau. Qhov thib tsib teeb meem ntawm lub connector yog lub contactor puas lawm. Cia li poob nws thiab hloov nws. Nco ntsoov tias txhua kab yuav tsum raug cim kom tsis txhob muaj qhov tsis meej.

Cov carbides tsim los ntawm cov tshuaj tiv thaiv sib sau ua ke ntawm cov ciam teb, ua ib txheej carburized nrog cov ntsiab lus siab carbon nyob rau hauv oxide zaj duab xis. Tom qab cov hlau yog me ntsis carburized, tus nqi kuj nce, cov yas txo qis, thiab cov oxide zaj duab xis saum npoo hloov xim. Tom qab hnyav carburization, oxide zaj duab xis yuav tev tawm, tus nqi kuj yuav nce siab, thiab cov cua sov yuav nkig.

Lub corrosion ntawm carbon ntawm nickel-chromium alloys thiab npib tsib xee-chromium-hlau alloys yog cov carbonization ntawm chromium nyob rau hauv lub grain ciam teb ntawm cov hlau, thiab nyob rau tib lub sij hawm lub generated chromium carbide ib feem yog oxidized, ua rau cov hlau seem tshwm ntsuab, uas. yog qhov hu ua "green corrosion" phenomenon.

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