Yuav Ua Li Cas Tshwj Xeeb Thermocouples Txhim Kho Cov Txheej Txheem Hlau?

Cov thermocouples tshwj xeeb tau dhau los ua cov cuab yeej siv tau zoo uas txhim kho tag nrho cov txheej txheem tsim khoom hauv lub ntiaj teb nyuaj thiab xav tau ntawm kev tsim steel. Cov cuab yeej zoo kawg no yog cov neeg txhawb nqa tseem ceeb ntawm kev ua tau zoo, kev ua haujlwm zoo, thiab raug nyob rau hauv ib puag ncig steel-ua; lawv yog considerably ntau tshaj li kub sensors.
Cov thermocouples tshwj xeeb muaj cov yam ntxwv tshwj xeeb txhais tau tias ua kom txaus siab rau cov teeb meem tshwj xeeb ntawm steel ntau lawm. Lawv ua hauj lwm ntawm Seebeck phenomenon, nyob rau hauv ib tug kub sib txawv generates ib tug voltage nyob rau hauv lub hlws ris ntawm ob dissimilar hlau. Qhov voltage no ces hloov mus rau qhov ntsuas kub. Cov thermocouples no tau tsim los tiv thaiv ib puag ncig hnyav, txawm li cas los xij, hauv kev tsim steel.
Tshwj xeeb thermocouples yog qhov tseem ceeb heev thaum lub sij hawm melting theem ntawm steel tsim. Kub nyob rau hauv hluav taws xob arc rauv tej zaum yuav me ntsis tshaj 1500 degrees Celsius. Cov khoom muaj peev xwm tiv taus cov cua kub zoo li no ua rau cov thermocouples. Piv txwv li, lawv tuaj yeem siv cov alloys uas muaj qhov kub thiab txias-xws li molybdenum-rhenium. Lawv muab kev tswj xyuas meej ntawm cov txheej txheem melting los ntawm kev ntsuas qhov ntsuas kub ntawm lub cub tawg. Yog tias qhov ntsuas kub tsawg dhau, cov khoom nyoos yuav tsis yaj tag nrho, ua rau cov hlau nrog cov khoom sib xyaw. Nws zoo li sim tsim cov kua zaub du los ntawm cov pob ntawm cov khoom uas tsis tau ua tiav. Cov impurities no tuaj yeem cuam tshuam qhov zoo ntawm cov khoom siv hlau thiab ua rau nws tsis muaj zog. Ntawm qhov tod tes, kub dhau heev tuaj yeem ua rau hlau oxidation ploj mus vwm. Cov hlau molten tuaj yeem hnov ​​​​mob nrog oxygen hauv qhov chaw kom tsim cov oxides uas cuam tshuam nws qhov zoo. Zoo li tus kws ua zaub mov zoo uas yuav tsum tau ua tib zoo tswj cov cua sov thaum npaj cov khoom noj qab haus huv, cov neeg tsim khoom steel nyob ntawm qee yam thermocouples los txhawb qhov zoo tshaj plaws melting kub.
Tshwj xeeb thermocouples tseem ceeb heev nyob rau hauv cov txheej txheem refining. Piv txwv li, rau lub cub tawg, qhov kub thiab txias cuam tshuam rau kev tshem tawm cov kab mob xws li phosphorus thiab sulfur. Cov txheej txheem tshuaj lom neeg uas pab cov kab mob no tshem tawm yog qhov ntsuas kub me ntsis. High precision tshwj xeeb thermocouples nyob rau hauv lub ladle cia cov neeg ua hauj lwm hloov cov refining tej yam kev mob raws li kub nyob rau hauv lub ladle. Yog tias qhov ntsuas kub dhau mus dhau qhov tsim nyog, cov txheej txheem refining yuav tsis muaj. Qhov no zoo li sim ntxuav dej tsis muaj qhov kub thiab txias; cov kab mob yuav tsis raug tshem tawm tag nrho. Cov thermocouples no tau lees paub tias cov hlau tau ua kom zoo rau qhov yuav tsum tau ua kom huv si los ntawm cov ntaub ntawv ntsuas kub, yog li txhim kho nws qhov zoo thiab kev ua haujlwm.
Hais txog kev casting, qee qhov thermocouples yog qhov tseem ceeb los lav qhov zoo ntawm qhov ua tiav zoo. Raws li molten steel yog muab tso rau hauv pwm, nws qhov kub thiab txias yuav tsum tau tswj kom zoo. Qhov kub thiab txias heev tuaj yeem ua rau muaj qhov tsis zoo xws li cam khwb cia hlau tawg lossis shrinkage voids. Cov quav ciab txias tsis sib xws thiab tsim qhov, ib yam li cov quav ciab kub nchuav sai heev rau hauv pwm. Hloov pauv, qhov kub qis dhau yuav ua rau cov hlau ntws tsis sib xws, ua rau cov khoom tsis tiav lossis tsis zoo. Thermocouples nyob rau hauv lub casting system los yog ze rau cov pwm tso cai rau ib tug los saib xyuas lub sij hawm ntawm kub nyob rau hauv qhov no guarantees tias cov hlau solidifies kom raug thiab tsis muaj qhov tsis zoo los ntawm kev cia ib tug hloov cov pwm 'txias pace thiab pouring kub.
Cov thermocouples tshwj xeeb yog qhov tseem ceeb heev hauv kev kho cua sov xws li annealing, quenching, thiab tempering. Txhawm rau tso qhov nro sab hauv thiab nce ductility, annealing heats cov hlau ces maj mam txias nws. Annealing yuav tsum muaj qhov kub thiab txias nyob rau hauv ib qho kev xaiv. Qhov tseeb zoo hauv kev ntsuas qhov kub thiab txias ua tau los ntawm cov thermocouples tshwj xeeb pab cov tswv lag luam kom tswj xyuas cov cua sov thiab cua txias. Nyob rau hauv quenching-tus txheej txheem ceev ceev-qhov kub poob yog qhov tseem ceeb heev. Yog tias qhov txias txias qeeb dhau, cov hlau yuav tsis ncav cuag qhov xav tau hardness. Qhov ntsuas kub yuav tsum tau muab los ntawm cov thermocouples lav qhov kev pom zoo ntawm cov txheej txheem kev kho cua sov. Cov thermocouples kom paub tseeb tias txhua kauj ruam ntawm cov txheej txheem kev kho cua sov khiav ntawm qhov kub thiab txias, yog li tsim cov hlau nrog cov khoom siv zoo, zoo li tus neeg xyuas pib ua lub suab paj nruag.
Tsis tas li ntawd koom nrog cov txheej txheem tswj hwm hauv cov chaw tsim khoom steel yog cov thermocouples tshwj xeeb. Lawv cov ntaub ntawv ntsuas kub ntawm lub sijhawm tso cai rau ib qho tuaj yeem ua tiav thiab ua kom tiav tag nrho cov txheej txheem tsim khoom. Hauv cov txheej txheem nruam nruam, piv txwv li, cov ntaub ntawv ntsuas kub los ntawm cov thermocouples tuaj yeem muab nkag rau hauv lub computer ua haujlwm uas hloov pauv ntau yam tsis zoo xws li molten steel flow rate, dej txias, thiab lwm yam. Qhov kev sib koom ua ke ntawm kev tswj hwm nrog cov thermocouples tshwj xeeb tsis yog tsuas yog ua kom muaj kev ua haujlwm ntawm cov hlau ntau lawm tab sis kuj txo qis qhov ua yuam kev ntawm tib neeg.
Txhua yam xav tau, tus kws tshaj lij thermocouples txhim kho cov txheej txheem steel ntau lawm. Txhua kauj ruam ntawm kev tsim steel nyob ntawm lawv raws li lawv tuaj yeem tiv taus qhov kub thiab txias, muab kev ntsuas kub zoo, thiab cuam tshuam nrog kev tswj hwm. Los ntawm melting mus rau refining, casting, thiab kev kho cua sov, cov thermocouples lav tias cov hlau tiav muaj qhov zoo tshaj plaws thiab cov yam ntxwv ntawm cov khoom siv. nyob ntsiag to tiv thaiv ntawm cov hlau, lawv txhawb cov sector mus rau kev ua tau zoo dua thiab txhim kho cov khoom zoo los ntawm lawv txoj kev saib xyuas ntsiag to.