Cov lus piav qhia luv luv ntawm solder thiab flux rau soldering hlau
Solder yog ib hom ntawm cov hlau fusible, uas ua rau kev tivthaiv ua rau muaj kev sib txuas nrog cov ntsiab lus sib txuas ntawm cov ntawv luam tawm. Tin (Sn) yog ib tug mos mos, malleable silver-dawb hlau, melting point ntawm 232 degree C, nyob rau hauv chav tsev kub tshuaj stability, tsis yooj yim rau oxidise, tsis poob ntawm metallic luster, kuj rau atmospheric corrosion. Lead (Pb) yog ib lub teeb ntsuab-dawb hlau, melting point ntawm 327 degree C, siab purity lead tsis kam rau atmospheric corrosion, tshuaj stability, tab sis muaj teeb meem rau tib neeg. Tin nyob rau hauv ib qho kev faib ua feem ntawm txhuas thiab ib tug me me ntawm lwm yam hlau yuav ua tau rau hauv ib tug tsawg melting point, zoo txav mus los, muaj zog adhesion rau lub Cheebtsam thiab nyob ntawm tej, siab mechanical zog, zoo hluav taws xob conductivity, tsis yooj yim rau oxidise, corrosion kuj, zoo, ci thiab zoo nkauj solder pob qij txha solder, feem ntau hu ua solder. Solder raws li tus nqi ntawm cov tin tuaj yeem muab faib ua 15 hom, raws li tus nqi ntawm cov tin thiab impurities nyob rau hauv cov tshuaj muaj pes tsawg leeg muab faib ua S, A, B peb qib. Kev tuav welding feem ntau siv hlau solder.
V. Flux
① flux flux feem ntau tuaj yeem muab faib ua inorganic flux, organic flux thiab resin flux, tuaj yeem yaj cov oxides ntawm cov hlau mus, thiab hauv cov vuam thiab cua sov ntawm cov hlau ncig ntawm huab cua kom cais tawm, tiv thaiv oxidation ntawm cov hlau thaum rhuab; tuaj yeem txo qhov nro ntawm molten solder, conducive rau wetting ntawm lub solder.
② soldermask los txwv cov solder tsuas yog nyob rau hauv qhov xav tau ntawm cov pob qij txha, cov ntawv luam tawm Circuit Court tsis tas yuav tsum tau welded rau lub rooj tsavxwm ib feem ntawm lub hau, tiv thaiv lub vaj huam sib luag kom nws yog welded los ntawm thermal shock yog me me, tsis yog. yooj yim rau blister, tab sis kuj ua lub luag hauj lwm nyob rau hauv kev tiv thaiv bridging, rub lub taub hau, luv luv-circuiting, cuav soldering thiab thiaj li nyob. Kev siv cov flux, yuav tsum tau welded raws li qhov loj ntawm thaj chaw thiab qhov chaw ntawm lub xeev ntawm qhov tsim nyog tus nqi ntawm daim ntawv thov, qhov ntau npaum li cas me me dhau los cuam tshuam rau qhov zoo ntawm vuam, qhov ntau npaum li cas, cov flux residue yuav corrode lub Cheebtsam los yog ua rau lub Circuit Court board rwb thaiv tsev kev ua tau zoo deterioration.
