Yuav ua li cas welding tooj liab yeeb nkab? Taw qhia rau tooj liab yeeb nkab vuam txoj kev thiab ceev faj
Cov kav dej tooj liab, tseem hu ua tooj liab kav, yog ib hom ntawm cov kav hlau tsis muaj hlau uas muaj zog tiv thaiv corrosion thiab tiv thaiv oxidation. Lawv tau siv dav hauv kev teeb tsa cov kav dej, cua sov thiab cua txias kav hauv cov chaw nyob niaj hnub thiab cov tsev. Cov kav dej tooj liab yuav tsum tau welded zoo thaum lub sijhawm teeb tsa kom ntseeg tau tias kev siv ib txwm muaj. Yog li, txoj kev vuam ntawm cov yeeb nkab tooj liab yog dab tsi? Cov kev ceev faj rau vuam yog dab tsi?
1. Copper yeeb nkab vuam txoj kev
1. Kev npaj rau vuam
① Ntxuav cov oxide zaj duab xis nyob rau sab nrauv ntawm cov yeeb nkab tooj liab sib koom thiab sab hauv ntawm cov yeeb nkab sib txuas. Thov muab tshuaj txhuam los yog kua dej sib npaug ntawm qhov huv ntawm cov yeeb nkab thiab sab hauv ntawm cov yeeb nkab fittings. Thaum siv tooj liab-phosphorus solder lossis qis-nyiaj tooj liab-phosphorus solder rau braze tooj liab kav thiab tooj liab fittings, tsis tas yuav tsum muaj flux.
②Ntxig cov yeeb nkab tooj liab rau hauv cov yeeb nkab haum, ntxig rau hauv qab thiab tig nws kom tsim nyog kom muaj qhov sib txawv. Yog hais tias nws yog coated nrog flux, cov dej ntau dhau los ntawm kev sib koom tes yuav tsum tau muab tshem tawm nrog ib daim ntaub huv.
2. Ua haujlwm vuam
① Thaum vuam, cov khoom siv vuam yuav tsum tau preheated. Tshav kub ntawm cov yeeb nkab tooj liab vuam sib txuas nrog nplaim taws. Thaum cov yeeb nkab tooj liab yog rhuab mus rau ntshav-liab, tshem tawm cov nplaim hluav taws thiab tso lub solder tiv thaiv qhov sib koom ua ke kom cov solder melts thiab ntws mus rau hauv cov welded tooj liab qhov chaw. Qhov kub tom qab cua sov tuaj yeem cuam tshuam los ntawm cov xim. Qhov kub thiab txias yog raws li nram no: tsaus liab: txog 600 degree; sib sib zog nqus liab: txog 700 degree; txiv kab ntxwv-liab: txog 1000 degree.
② Siv cov nplaim hluav taws kub kom sib npaug ntawm cov pob qij txha ntawm cov yeeb nkab tooj liab kom txog thaum lawv ncav cuag qhov kub thiab txias. Thaum soldering, hluav taws xob cua sov kuj tuaj yeem siv los ua kom sov cov pob qij txha mus rau qhov kub thiab txias.
③ Siv lub solder los kov cov pob qij txha uas tau muab tso rau hauv qhov kub thiab txias los txiav txim qhov kub ntawm qhov sib koom ua ke. Yog tias lub solder tsis yaj, nws txhais tau hais tias qhov kub ntawm qhov sib koom ua ke tseem tsis tau mus txog qhov kub thiab txias, thiab qhov sib koom ua ke yuav tsum tau ua kom sov ntxiv; Yog hais tias lub solder tuaj yeem yaj sai sai, nws txhais tau tias Thaum qhov kub ntawm cov yeeb nkab tooj liab sib koom tau mus txog qhov kub thiab txias, koj tuaj yeem ua kom sov rau qhov sib koom ua ke kom qhov kub thiab txias ntawm qhov sib koom ua ke saum lub brazing kub, ntxiv solder rau qhov sib txawv ntawm qhov sib koom ua ke. , thiab siv lub tshav kub ntawm qhov sib koom ua ke kom yaj lub solder. mus rau hauv qhov sib txawv kom txog thaum lub solder sib koom ua ke. Tsis txhob siv cov nplaim hluav taws ncaj qha rau ntawm lub solder thiab siv rau qhov chaw ntawm qhov sib txawv.
3. Vuam txias
Tshem tawm cov cua sov, nres cua sov, thiab tso cai rau qhov sib koom ua ke kom txias thiab crystallize nyob rau hauv lub xeev zoo li qub los tiv thaiv cov molten solder los ntawm kev co thaum lub sij hawm txias thiab crystallization, uas yuav cuam tshuam rau qhov zoo ntawm brazing. Siv cov nitrogen qhuav los ntxuav cov oxides thiab vuam slag hauv cov yeeb nkab tooj. Yog tias tsim nyog, siv cov kua roj vanish rau kev tiv thaiv.
4. Kho vuam tom qab vuam
① Thaum lub sij hawm ntsuas lub siab ntawm cov yeeb nkab tooj liab, yog tias pom muaj qhov xau hauv qhov vuam, kev kho vuam yuav tsum tau ua. Thaum lub sij hawm kho welding, nitrogen siv nyob rau hauv lub system siab test yuav tsum raug tso tawm, thiab lub siab yuav tsum tau sim dua tom qab vuam.
② Ua ntej kho qhov vuam ntawm cov kav hlau, cov oxide txheej ntawm qhov chaw yuav tsum tau muab ntxuav kom huv nrog cov ntaub qhwv. Tom qab kho vuam, cov nplai oxide yuav tsum tau muab tshem tawm, thiab tom qab quenching hauv dej, cov yeeb nkab tooj liab yuav tsum tau qhuav yam tsis muaj dej ntws. Tom qab tag nrho cov welding tiav, lub kaw lus yuav tsum tau purged nrog nitrogen.
2. Tej yam uas yuav tsum tau nco ntsoov thaum vuam cov kav tooj liab
1. Thaum vuam, tos kom txog thaum lub solder solidifies ua ntej txav cov yeeb nkab tooj liab, txwv tsis pub cov welded ib feem yuav tawg. Thaum vuam, tos kom txog thaum lub refrigerant yog drained ua ntej mus. Txwv tsis pub, thaum lub tub yees ntsib cov nplaim taws, nws yuav tsim cov tshuaj lom phosgene, uas ua rau muaj kev phom sij rau tib neeg lub cev.
2. Copper yeeb nkab vuam yuav tsum tau siv cov nplaim taws. Lub tog raj kheej roj yuav tsum tau muab tso ncaj thiab nyob deb ntawm ntau tshaj 5 meters ntawm qhov qhib nplaim taws kom tsis txhob muaj hluav taws kub. Txoj kev sib txuas ntawm lub vuam teeb thiab lub tog raj kheej roj yuav tsum raug.
3. Thaum vuam cov kav tooj liab, kev tsim kho yuav tsum tau ua nyob rau hauv qhov chaw uas muaj cua zoo. Cov neeg ua haujlwm tsim kho yuav tsum hnav cov iav tiv thaiv zoo, thiab cov khoom siv tua hluav taws yuav tsum muaj nyob rau ntawm qhov chaw vuam.
Cov yeeb nkab tooj liab vuam txoj kev yuav tsum tsis tsuas yog ua raws li cov lus qhia saum toj no, tab sis kuj hnav cov cuab yeej tiv thaiv thaum lub sij hawm vuam kom tiv thaiv kev sib tsoo los ntawm scalding ntawm daim tawv nqaij. Koj yuav tsum hnav looj tsom iav dub, vim hais tias cov hluav taws kub hnyiab yog qhov khaus heev rau qhov muag thiab tuaj yeem ua rau mob qhov muag tau yooj yim.
