Qhov sib txawv ntawm lub zog ntawm cov hluav taws xob soldering hlau
Nyob rau hauv cov txheej txheem kho hluav taws xob, hluav taws xob soldering hlau yog ib qho khoom siv tsis tau, tab sis ntau tus neeg ua haujlwm saib xyuas uas nyuam qhuav tuaj rau hauv kev sib cuag nrog cov hlau soldering tsis paub dab tsi tus qauv siv los xaiv lub hwj chim ntawm cov hluav taws xob soldering hlau thaum lub sij hawm vuam, thiab lawv feem ntau mus thoob plaws lub ntiaj teb no nrog ib tug soldering hlau. Qhov cuam tshuam ncaj qha tshaj plaws yog tias cov nyhuv vuam tsis zoo vim qhov tsis zoo ntawm kev xaiv lub zog ntawm cov hlau soldering.
Lub zog ntawm cov hluav taws xob hluav taws xob siv hluav taws xob yog qhov loj heev, nws yooj yim rau hlawv cov khoom (feem ntau, thaum qhov kub thiab txias ntawm diode thiab triode siab tshaj 200 degree, nws yuav hlawv tawm) thiab cov xov hlau luam tawm yuav poob ntawm lub substrate; Lub zog ntawm cov hlau siv yog me me, thiab cov tin soldering tsis tuaj yeem ua kom tiav, cov flux tsis tuaj yeem hloov pauv, cov pob qij txha tsis du thiab ruaj khov, thiab nws yooj yim los tsim cov vuam cuav. Feem ntau, nws yog siv rau vuam integrated circuits, luam Circuit Court boards, CMOS circuits, kho kom zoo nkauj transistors, IC recorders, TV teeb, rau ib tug tib yam Circuit Court thwmsim, feem ntau 20W yog tsim nyog, thiab kho lub tshuab nqus tsev raj, xws li amplifiers thiab qub twj paj nruag. , 35W yog qhov tsim nyog, thiab cov cua sov sab nraud yog 45W. Kev xaim ntawm vuam loj transformer thiab cov kab hauv av ntawm cov hlau puag phaj yog 50W rau cov cua sov sab hauv thiab 75W rau cov cua sov sab nraud. Yog tias koj xav tau cov khoom siv hlau, koj yuav tsum siv lub tshuab hluav taws xob hluav taws xob sab nraud uas muaj zog tshaj 100W. Yog tias muaj kev tso cai, cov neeg nyiam siv xov tooj cua tuaj yeem nruab nrog 2OW sab hauv cua sov hom, 35W sab hauv lossis sab nraud cua sov hom, thiab 150W sab nraud cua sov hom hluav taws xob soldering hlau, kom lawv tuaj yeem ua tau raws li ntau yam kev xav tau vuam.
Lub solder peb siv feem ntau muab faib ua ob hom: leaded solder thiab lead-free solder, tab sis feem ntau siv yog leaded solder, uas muaj ib tug muaj pes tsawg leeg ntawm 63 feem pua tin, 37 feem pua cov hlau lead, thiab ib tug melting point ntawm 183 degree; Thaum lub sij hawm muaj pes tsawg leeg ntawm cov hlau lead-free solder yog 99 feem pua tin, flux yog li ntawm 1 feem pua, thiab lub melting point yog 227 degree. Lead solder muaj qhov zoo ntawm qhov tsis tshua muaj melting point, yooj yim soldering, thiab tus nqi qis, tab sis nws tsis yog ib puag ncig tus phooj ywg, thiab cov hlau lead yog qhov teeb meem rau tib neeg lub cev, yog li tom qab soldering, koj yuav tsum ntxuav koj txhais tes kom zoo. Thaum lub sij hawm cov txheej txheem soldering, nws yog qhov zoo tshaj plaws los hnav lub npog ntsej muag lossis qhov chaw nrog lub teeb ci kom ntseeg tau tias muaj qee qhov kev ncua deb ntawm lub taub hau thiab vuam. Nrog rau kev txhim kho ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig, cov hlau tsis muaj hlau lead yog tam sim no siv rau lub tshuab vuam hauv cov chaw tsim khoom. Vim lub siab melting point ntawm cov hlau lead-free solder, nws tsis yooj yim to taub vim li cas nws yog ib qho nyuaj rau yaj lub solder thaum kho cov khoom siv hluav taws xob txawv teb chaws.
Lub tshuab hluav taws xob hluav taws xob yog cov khoom siv hluav taws xob cua sov, uas tuaj yeem tsim kom muaj qhov kub ntawm li 250 degree tom qab ua kom muaj zog. Thaum lub sij hawm soldering txheej txheem ntawm hluav taws xob soldering hlau, nws yog tiag tiag ib tug txheej txheem ntawm tshav kub conduction. Thaum nws sib cuag nrog lub soldering nto, lub tshav kub ntawm lub taub hau ntawm cov hlau yog hloov mus rau lub solder, thiab lub solder absorbs lub tshav kub, melts thiab ntws, thiab tsim ib tug kaj thiab puag ncig solder sib koom nyob rau hauv qhov kev txiav txim ntawm nto nro. . Nyob rau hauv tus txheej txheem ntawm vuam kub conduction, vim hlau yog zoo conductors ntawm tshav kub, lub tshav kub hloov yog sai dua. Thaum lub sij hawm melting txheej txheem ntawm solder, vim lub tshav kub poob ntawm lub soldering hlau taub, nws kub yuav poob ntau los yog tsawg. Yog tias qhov sib koom ua ke muaj thaj tsam loj, nws yuav tsum tau nqus cua sov ntau kom ua rau lub solder ntawm nws mus txog qhov melting point. Yog hais tias lub taub hau hlau yog me me thiab khaws cov cua sov tsawg dua, qhov kub thiab txias poob sai dua, thiab cov cua sov tsim los ntawm lub zog me me ntawm cov tub ntxhais hlau soldering yuav lig dhau los ua kom cov cua sov poob. Lub sijhawm no, qhov tshwm sim zoo tshaj plaws yog tias lub solder tsis yaj lossis tsis yaj tag. Nyob rau hauv cov ntaub ntawv no, peb yuav tsum tau siv ib tug high-power soldering hlau rau welding. Ntawm qhov tsis sib xws, yog tias cov khoom siv welded me me, peb tsis tas yuav siv lub zog loj soldering hlau; Yog tias peb siv lub zog hluav taws xob siab, peb yuav tsum tau them sai sai rau lub sijhawm vuam, txwv tsis pub cov cua sov ntau dhau yuav yooj yim ua rau lub voj voog uas tam sim no ntws, thiab lub rooj tsav xwm hauv Circuit Court yuav puas. , ua rau cov ntawv luam ntawv tooj liab poob tawm. Lub zog tshwj xeeb ntawm cov hlau soldering yog qhov tsim nyog, thiab tsis muaj qhov xav tau tshwj xeeb. Kev ua haujlwm ntev ntev ntawm cov neeg ua haujlwm saib xyuas yog txoj hauv kev zoo tshaj plaws los xaiv cov hlau uas haum rau koj.
