Lub luag haujlwm tseem ceeb ntawm recarburizer yog dab tsi?

Hauv kev lag luam metallurgical, cov ntsiab lus recarburizer, carbon raiser, thiabGPC(Graphitized Petroleum Coke) feem ntau siv sib hloov los piav qhia txog qhov tseem ceeb hauv kev tsim cov hlau ferrous. Nkag siab txog lub luag haujlwm tseem ceeb ntawm arecarburizeryog ib qho tseem ceeb rau metallurgists, foundry managers, thiab zoo tswj cov tub txawg nrhiav kom optimize lawv cov txheej txheem melting thiab cov khoom zoo kawg.

Lub luag haujlwm tseem ceeb ntawm arecarburizeryog los kho cov ntsiab lus ntawm cov pa roj carbon monoxide mus rau theem teev tom qab cov txheej txheem melting inevitably txo nws. Thaum cov hlau los yog hlau seem melted nyob rau hauv hluav taws xob arc furnaces los yog induction furnaces, carbon oxidation tshwm sim lawm raws li oxygen interacts nrog cov hlau molten. Qhov kev poob qis no tuaj yeem muaj li ntawm 10% mus rau 30% nyob ntawm cov khoom siv melting, cov khoom siv, thiab cua sov cua.

High -zoocarbon raiserxws liGPC(Graphitized Petroleum Coke) ua tau zoo rov qab qhia cov pa roj carbon monoxide uas ploj lawm nrog cov kev mob tshwm sim tsawg.GPCmuab cov txiaj ntsig tshwj xeeb ntawm no vim tias nws cov qauv graphitic txhawb kev tawg sai thiab kev nqus tau siab, feem ntau ua tiav 90-95% carbon rov qab piv rau cov ntaub ntawv qis dua. Cov pa roj carbon monoxide hloov tau yooj yim qhib los ntawm kev tsim nyogrecarburizerkev xaiv ua kom tiav chemistry ua tau raws li cov neeg siv khoom tshwj xeeb.

Yog tsis muaj txiaj ntsigrecarburizerTsis tas li ntawd, ua kom tiav cov hom phiaj cov qib carbon yuav tsis sib haum, ua rau tsis lees txais cov cua sov thiab cov nqi rov ua dua. Covcarbon raiseryog li no yog lub hauv paus cuab yeej rau cov pa roj carbon chemistry tswj nyob rau hauv niaj hnub steelmaking thiab foundry hauj lwm.

Tshaj tsuas yog ntxiv cov pa roj carbon, qhov zoorecarburizercuam ​​tshuam cov qauv metallurgical ntawm cov khoom kawg. Nyob rau hauv cam khwb cia hlau ntau lawm, hom thiab zoo ntawmcarbon raiserncaj qha cuam tshuam rau graphite morphology- cov duab, qhov loj me, thiab kev faib tawm ntawm graphite hais nyob rau hauv cov hlau matrix.

HwmGPCCov qib, nrog rau lawv cov qauv crystalline thiab tsis tshua muaj leej faj cov ntsiab lus (feem ntau 0.03-0.06%), txhawb kev tsim cov graphite zoo hauv cov ntaub ntawv hlau. Covrecarburizerpab tsis tau tsuas yog carbon units tab sis kuj nucleation chaw rau graphite nag lossis daus thaum solidification. Qhov txiaj ntsig nucleation no yog qhov tseem ceeb tshwj xeeb rau kev ua tiav cov khoom siv kho tshuab zoo ib yam thoob plaws castings.

Foundries siv high -kev ua tau zoocarbon raiserCov ntaub ntawv qhia txog kev txhim kho machinability, zoo dua tensile lub zog, thiab txo qhov tsis xws luag casting. Covrecarburizeryog li ua haujlwm raws li ob qho tib si tshuaj ntxiv thiab kev hloov kho microstructural, cuam tshuam cov khoom uas txuas mus deb tshaj cov ntsiab lus carbon yooj yim.

Dissolution yam ntxwv ntawm arecarburizercuam ​​tshuam rau qhov cub efficiency thiab lub zog noj. Thaum xaiv kom raug, acarbon raiserdissolves sai thiab tag, txo lub sij hawm rauv thiab txo lub zog yuav tsum tau ib tuj ntawm molten hlau.

GPCexcels nyob rau hauv no hais txog vim nws superior thermal conductivity thiab molten hlau wettability. Cov qauv graphitic tso cai rau cua sov kom nkag mus rau cov khoom sai sai thaum cov yam ntxwv saum npoo txhawb kev sib cuag nrog cov hlau molten tam sim ntawd. Qhov kev ua tau zoo no txhais tau rau lub sijhawm tuav luv, txo oxidation losses, thiab txo tag nrho lub zog siv.

Ntxiv thiab, ntxivrecarburizerntawm qhov zoo tshaj plaws nyob rau hauv lub voj voog melting-feem ntau thaum lub sij hawm muab hluav taws xob los yog tam sim ntawd tom qab tapping- tuaj yeem txhim kho cov cua sov hauv lub cub tawg. Covcarbon raiserkoom nrog hauv slag chemistry thiab tuaj yeem pab tswj kom txo tau cov xwm txheej uas tiv thaiv cov ntsiab lus ntawm cov oxidation tsis tsim nyog.

Thaumrecarburizersawv cev rau tus nqi tsim khoom ncaj qha, xaiv kom raug thiab siv tau los txo tag nrho cov nqi tsim khoom. Siab - zoocarbon raisercov ntaub ntawv zoo liGPCmuab cov pa roj carbon zoo dua qub, txhais tau tias yuav tsum muaj cov khoom siv tsawg dua kom ua tiav cov pa roj carbon qib piv rau qib qis dua - qib.

Qhov kev ua tau zoo no txuas ntxiv tshaj li kev txuag khoom. Kev tshem tawm sai dua txo lub sijhawm ua kom sov, txiav kev siv hluav taws xob thiab ua kom muaj peev xwm ntau lawm. Zoo ib yamrecarburizerkev ua tau zoo txo ​​qis tsis lees txais cov cua sov thiab rov ua haujlwm dua, txhim kho thawj zaug - kis tau los. Kev kwv yees chemistry ntawm premiumGPCkuj tso cai rau metallurgists kom optimize lwm alloy ntxiv nrog kev ntseeg siab.

Tsis tas li ntawd, cov qib impurity tsawg hauv qhov zoorecarburizercov khoom lag luam-tshwj xeeb yog sulfur thiab nitrogen- txo qhov xav tau cov ntaub ntawv kho mob kim tom qab hauv cov txheej txheem. Rau ductile hlau ntau lawm, txhua kilogram ntawm sulfur qhia los ntawm lubcarbon raiseryuav tsum tau magnesium ntxiv- muaj cov nodulizer rau neutralize, tsim kom muaj nuj nqis leverage rau qis-sulfurGPCqib.

Lub luag haujlwm tseem ceeb ntawm arecarburizertxuas mus deb tshaj qhov tsuas yog ntxiv carbon rau molten hlau. Txawm sivGPClos yog lwm yamcarbon raiserhom, qhov tseem ceeb additive restores chemistry rau specification, influences metallurgical qauv, txhim kho rauv efficiency, thiab txo tag nrho cov nqi ntau lawm. Kev nkag siab txog cov haujlwm ntau yam no ua rau cov kws tshaj lij metallurgical xaiv qhov zoo tshaj plawsrecarburizerrau lawv cov kev siv tshwj xeeb, ntsuas kev ua tau zoo nrog kev xav txog kev lag luam kom ua tiav cov txiaj ntsig tau zoo tshaj plaws hauv lawv cov haujlwm melting.