Lub ntsiab tseem ceeb tshaj plaws hauv kev kho cov khoom siv yog soldering. Solder, fluxes, solder paste - tag nrho cov no yuav tsum tau coj mus rau hauv tus account thaum ua haujlwm kho. Yog hais tias txhua yam yog meej meej nrog solder - feem ntau tin-lead solders nrog cov ntsiab lus sib txawv yog siv rau qhov no (nyob ntawm seb muaj pes tsawg leeg ntawm cov alloy), ces dab tsi txog cov flux? Nws yog dab tsi?
Lub hom phiaj tseem ceeb ntawm cov flux yog tshem tawm cov oxides ntawm qhov chaw, nrog rau txo qhov nro ntawm qhov chaw txhawm rau txhawm rau txhim kho kev sib kis. Tsis tas li ntawd, soldering flux pab tiv thaiv kev sib koom ua ke los ntawm ib puag ncig cuam tshuam.
Dab tsi yog fluxes
Raws li lawv cov nyhuv ntawm cov hlau, cov fluxes yog cov hauv qab no.
- Active (tseem hu ua acid). Lawv muaj hydrochloric acid, fluorine thiab chloride hlau. Active soldering flux intensively dissolves oxide zaj duab xis uas tsim nyob rau hauv cov hlau nto, yog li muab siab mechanical zog ntawm lub neej yav tom ntej kev sib koom tes. Nws yuav tsum tau nco ntsoov tias lub active flux tsis haum rau kev khoCov khoom siv hluav taws xob, raws li nws cov khoom seem corrode qhov taw tes rau lub sijhawm.
- Acid-free. Cov no suav nrog rosin, nrog rau cov fluxes npaj los ntawm rosin nrog ntxiv ntawm turpentine, cawv lossis glycerin. Acid-free soldering flux tsis tsuas yog ntxuav cov hlau nto ntawm oxides, tab sis kuj tiv thaiv nws los ntawm oxidation ntxiv. Tsis tas li ntawd, kev siv cov rosin tsis ua rau lub ntsej muag corrosion. Feem ntau siv thaum soldering tooj liab, bronze thiab tooj dag cov khoom.
- Activated. Lawv tau npaj los ntawm rosin, uas phosphoric lossis hydrochloric aniline, salicylic acid thiab hydrochloric acid diethylamine ntxiv rau hauv me me. Activated soldering flux tuaj yeem siv rau ntau yam hlau thiab alloys (hlau, tooj liab, npib tsib xee, tooj liab, nichrome, nyiaj, hlau). Nws kuj tseem siv tau los ua cov hlau oxidized tooj liab alloy yam tsis tau stripping ua ntej.
- Anti-corrosion. Cov fluxes no yog tsim los ntawm phosphoric acid nrog ntxiv ntawm ntau cov kuab tshuaj thiab cov organic tebchaw. Tsis tas li ntawd, qee qhov ntawm cov fluxes no yuav muaj cov organic acids. Anti-corrosion flux yog siv rau soldering tooj liab thiab nws cov alloys, nrog rau cov nyiaj, platinum thiab constantan.
- Tiv thaiv. Cov no suav nrog cov roj txiv roj, siv quav ciab, roj av jelly, hmoov qab zib. Kev tiv thaiv fluxes tsis muaj tshuaj lom neeg ntawm cov hlau, thiab tseem tiv thaiv qhov chaw ntxuav ntawm oxidation.
Kuj rau cov cam khwb cia hlau, carbon steels, thiab tooj liab thiab nws cov alloysborax (sodium tetraborate) yog siv, uas yog dawb crystalline hmoov nrog melting point ntawm 741oC.
Tsis tas li, borax (ntau qhov tseeb, nws qhov sib xyaw nrog boric acid hauv qhov sib piv 1: 1) yog siv rau cov hlau tsis muaj hlau thiab cov hlau tsis muaj cua sov.
Raws li cov khoom siv tooj dag, cov khoom sib tov uas muaj qhov sib npaug ntawm cov lus ntsev thiab calcium chloride yog siv.
Aluminium soldering yuav tsum muaj flux nrog lub melting point tsawg. Feem ntau aluminium brazing flux muaj 30 txog 50% potassium chloride.
Soldering flux muaj nyob rau hauv hmoov, kua los yog muab tshuaj txhuam. Tsis tas li ntawd, muaj cov nplaum tshwj xeeb uas cov khoom siv uas twb muaj lawm nrog cov flux.
Yam yuav tsum paub thaum soldering
Thaum xaiv cov flux rau soldering, tsis yog tsuas yog cov khoom ntawm cov khoom yuav tsum tau soldered yog muab rau hauv tus account, tab sis kuj yuav siv hom solder. Lub melting point ntawm lub flux yuav tsum tsis txhob tshaj lub melting point ntawm lub solder.
Txawm hais tias siv cov flux hom twg los xij, qhov chaw yuav tsum tau solder tom qab ua tiav cov haujlwm yuav tsum tau muab so nrog ib daim ntaub ntub dej hauv acetone los yog cov dej cawv rectified. Tom qab ntawd ntxuav qhov chaw no nrog txhuam los yog txhuam moistened nrog cov kuab tshuaj kom tshem tawm cov dej ntws tawm. Qhov no yog tshwj xeeb tshaj yog muaj tseeb ntawm cov nquag flux, txij li thaum cov khoom ntawm nws decomposition tsis tsuas pollute qhov chaw ntawm soldering, tab sis kuj yog ib qhov chaw ntawm corrosion.
