Puas yog soldering hlau lom?
Solder hlau, ib yam khoom siv rau soldering nrog ib tug hluav taws xob soldering hlau, txawm hais tias nws lub ntsiab tivthaiv yog tin, nws kuj muaj lwm yam hlau. Feem ntau muab faib ua cov hlau lead thiab tsis muaj txhuas (uas yog, ib puag ncig tus phooj ywg). Nrog rau kev tshaj tawm ntawm EU ROHS cov qauv, ntau thiab ntau PCB soldering factories tam sim no xaiv cov hlau lead-dawb thiab ib puag ncig tus phooj ywg solder hlau, thiab cov hlau lead hlau txuas tau maj mam hloov. Nws tsis yog ib puag ncig tus phooj ywg thiab tsis tuaj yeem raug xa tawm. Lead-free solder paste, lead-free solder wire, thiab lead-free solder bar yog cov khoom tseem ceeb ntawm kev ua lag luam tam sim no.
Txhawm rau muab nws yooj yim: vim qhov qis melting point ntawm feem ntau siv solder, nws muaj li ntawm 60 feem pua cov hlau lead thiab txog 40 feem pua tin, yog li cov solder nws tus kheej yog tshuaj lom. Feem ntau ntawm cov solders nyob rau hauv lub lag luam yog hollow thiab puv nrog rosin, yog li cov roj uas koj tau hais yog tej zaum volatilized thaum lub rosin nyob rau hauv lub solder melts thaum vuam. Cov roj volatilized los ntawm rosin kuj yog me ntsis lom, thiab cov pa roj no tsis zoo siab heev.
Qhov teeb meem tseem ceeb ntawm kev sib tsoo yog cov fume txhuas, txawm tias nws yog cov hlau tsis muaj txhuas, nws muaj qee cov hlau lead. Tus nqi txwv ntawm txhuas fume nyob rau hauv GBZ2-2002 yog tsawg heev, thiab toxicity siab heev, yog li nws yuav tsum tau tiv thaiv. Vim yog kev puas tsuaj rau tib neeg lub cev thiab ib puag ncig thaum lub sijhawm vuam, hauv Tebchaws Europe, kev tiv thaiv cov neeg ua haujlwm vuam thiab kev tiv thaiv ib puag ncig tau raug tswj hwm raws li kev cai lij choj, thiab vuam yam tsis muaj kev tiv thaiv ib puag ncig. Nyob rau hauv ISO14000 tus qauv, muaj cov kev cai meej ntawm kev kho thiab kev tiv thaiv cov pa phem hauv cov txheej txheem tsim khoom.
Tin muaj cov hmoov lead. Yav dhau los, cov hlau lead nyob rau hauv solder hlau cais solder raws li ib tug ua hauj lwm txaus ntshai txoj hauj lwm (nyob rau hauv lub teb chaws occupational kab mob catalog); tam sim no peb cov tuam txhab lag luam siv lead-free solder hlau, cov khoom tseem ceeb yog tin, raws li ntsuas los ntawm Lub Chaw Tiv Thaiv Kab Mob thiab Tiv Thaiv Nws yog tin dioxide; nws tsis yog nyob rau hauv lub teb chaws daim ntawv teev cov kab mob ua hauj lwm.
Feem ntau hais lus, txhuas fume yuav tsis tshaj tus qauv hauv cov txheej txheem tsis muaj hmoov txhuas, tab sis muaj lwm yam kev phom sij hauv kev sib txuas, xws li flux (rosin-zoo li tshuaj) muaj qee yam kev phom sij, uas nyob ntawm qhov xwm txheej tshwj xeeb. Cov neeg ua haujlwm feem ntau tuaj yeem tshawb xyuas lub logo thiab qeb ntawm cov tin faib, kom lawv tuaj yeem muaj pov thawj thiab nug lub tuam txhab kom kho (lawv tuaj yeem muab lawv cov kev xav rau lub Hoobkas hauv kev lag luam sab hauv). Yog tias cov tin siv muaj cov hmoov txhuas, nws yuav tsum ua rau lub cev tsis zoo. Tom qab lub sijhawm ntev, lawv khaws cia hauv lub cev thiab ua rau lub cev tsis muaj zog ntawm lub paj hlwb.
Lead-free solder wire yog ib puag ncig tus phooj ywg, tab sis cov hlau lead-dawb solder hlau kuj ua rau tib neeg lub cev. Cov ntsiab lus tsis tshua muaj hlau lead-dawb solder hlau tsis muaj txhuas. Piv nrog cov hlau lead uas muaj cov hlau lead, cov hlau tsis muaj hlau lead tsis muaj teeb meem rau ib puag ncig thiab tib neeg lub cev muaj kuab paug tsawg dua cov hlau lead. Cov roj uas tsim thaum lub sij hawm soldering yog tshuaj lom, thiab nws yog tsim los ntawm cov pa vapors xws li rosin roj thiab zinc chloride.
