Yuav ua li cas xaiv ib tug soldering flux

Qhov tseem ceeb tshaj lub caij rau kho ntawm tej apparatus yog lub soldering. Solder, flux, solder muab tshuaj txhuam - tag nrho cov no yuav tsum raug xam tias yog thaum nqa tawm kho. Yog hais tias solder tag nrho kuj tseeb - feem ntau siv rau qhov no tin-lead solders uas txawv melting sov (nyob ntawm seb hlau muaj pes tsawg leeg), yog dab tsi hais txog cov flux? Yuav ua li cas yog nws rau?

Lub hom phiaj tseem ceeb ntawm ib tug flux - tshem oxides ntawm tus nto, thiab kuj txo nto nro los txhim kho lub kis ntawm cov tshuaj lo. Ntxiv mus, flux rau soldering ua hauj lwm pab los tiv thaiv lub hlws ris los ntawm cov sab nraud ib puag ncig.

Yuav ua li cas yog cov fluxes

Los ntawm qhov kev txiav txim, sib sib zog tsa rau lub hniav hlau, fluxes yog cov nram qab no hom.

• Active (kuj hu ua acidic). Nyob rau hauv lawv muaj pes tsawg leeg muaj hydrochloric acid, fluorides thiab chlorides hlau. Active brazing flux yaj sai oxide zaj duab xis tsim nyob rau hlau nto, yog li muab siab txhua yam zog lawm yav tom ntej kev twb kev txuas. Nws yuav tsum tau nco ntsoov tias active flux yog tsis haum rau kho ntawm hluav taws xob khoom, raws li nws cov remnants nws thiaj li corrode lub soldering.
• Acid-free. Cov no muaj xws rosin, raws li zoo raws li npaj rau lub hauv paus ntawm rosin flux nrog rau qhov sib ntxiv ntawm Turpentine, haus dej cawv los yog glycerin. Acid-free soldering flux tsis tsuas cleans lub hlau nto ntawm oxides, tab sis kuj tiv thaiv nws los ntawm ntxiv oxidation. Tsis tas li ntawd, siv ntawm rosin tsis ua xeb qhov chaw. Feem ntau siv rau soldering tooj liab, bronze thiab tooj dag cov khoom.
• Tshuab txais. Yog npaj los ntawm rosin, nyob rau hauv uas yog ntxiv me me ntawm phosphorus los yog aniline hydrochloride, salicylic acid thiab diethylamine hydrochloride. Tshuab txais flux rau brazing yuav tsum muaj ntaub ntawv mus rau ib tug ntau yam ntawm hlau thiab alloys (hlau, tooj liab, npib tsib xee, bronze, nichrome, silver, steel). Nws kuj yuav siv tau rau brazing qhov chaw ua los ntawm oxidized tooj liab alloys tsis muaj pre-stripping.
• Anticorrosion. Cov fluxes no yog ua los ntawm phosphoric acid nrog tas li ntawd ntawm ntau yam organic kuab tshuaj thiab cov tebchaw. Tsis tas li ntawd, cov muaj pes tsawg leeg ntawm ib co ntawm cov fluxes tej zaum yuav muaj cov organic acids. Corrosive flux yog siv rau brazing tooj liab thiab nws alloys, thiab nyiaj, platinum thiab constantan.
• Tiv. Cov no muaj xws txiv roj roj, waxes, roj av jelly, hmoov qab zib. Tiv fluxes tsis muaj hlau tshuaj txiav txim, raws li zoo raws li kev tiv thaiv tus ntxuav nto los ntawm oxidation.

Nyob rau hauv tas li ntawd, solder khoom los ntawm cam khwb cia hlau, carbon steels, thiab tooj liab thiab nws alloys yog siv borax (sodium tetraborate), uas yog ib tug dawb crystalline hmoov muaj ib tug melting sov li ntawm 741 ° ^C.

Tsis tas li ntawd borax (ntau precisely, nws sib tov nrog boric acid nyob rau hauv ib tug ratio ntawm 1: 1) yog siv rau brazing stainless steel thiab khoom superalloys.

Raws li cov flux rau dag khoom, ib tug sib tov muaj raws ntawm vaj huam sib qhov chaw ntawm sodium tshuaj dawb thiab calcium chloride.

Brazing ntawm txhuas cov khoom yuav tsum tau flux muaj ib tug uas tsis muaj melting point. Feem ntau, cov flux rau txhuas brazing muaj 30 mus rau 50% poov tshuaj tshuaj dawb.

Flux rau soldering yuav tau ua nyob rau hauv daim ntawv ntawm cov hmoov, kua los yog muab tshuaj txhuam. Tsis tas li ntawd, muaj kev tshwj xeeb solder muab tshuaj txhuam nyob rau hauv uas solder hais yog muaj ua ke nrog cov twb submerged.

Yuav ua li cas yog ib qho tseem ceeb kom paub tias thaum brazing

Thaum xaiv ib tug brazing flux yog muab rau tus account tsis tau tsuas yog cov ntaub ntawv uas los ntawm uas ua rau qhov chaw yuav tsum tau soldered, tab sis uas siv solder. Lub melting point ntawm lub flux yuav tsum tsis txhob ntau tshaj lub melting kub ntawm cov tshuaj lo.

Tsis hais txog ntawm lub hom soldering flux qhov chaw tom qab daim ntawv thov yuav tsum tau wiped nrog ib daim ntaub soaked nyob rau hauv acetone los yog rectified ntsuj plig. Tom qab hais tias, ntxuav qhov chaw no txhuam los yog txhuam moistened nrog tej kuab kom tshem tawm flux residues. Qhov no yog tshwj xeeb tshaj yog muaj tseeb ntawm lub active flux, txij li thaum nws decomposition khoom tsis tsuas tsim plua plav paug brazed tab sis yog hearth corrosion.