Kev taw qhia txog qhov sib txawv ntawm qhov ntsuas hluav taws xob ntawm hluav taws xob soldering hlau
Nyob rau hauv cov txheej txheem ntawm kev kho hluav taws xob, hluav taws xob soldering hlau yog ib qho cuab yeej tseem ceeb, tab sis ntau tus neeg saib xyuas uas nyuam qhuav tuaj ntsib nrog cov hlau soldering tsis paub tus qauv xaiv lub zog ntawm cov hlau soldering thaum lub sij hawm vuam. Feem ntau, cov hlau soldering yuav mus thoob ntiaj teb. Qhov cuam tshuam ncaj qha tshaj plaws yog tias cov nyhuv vuam tsis zoo vim tsis ua tib zoo mloog rau lub zog ntawm cov hlau uas tau xaiv.
Lub zog ntawm cov hluav taws xob hluav taws xob siv hluav taws xob yog siab dhau, uas tuaj yeem hlawv tawm cov khoom siv tau yooj yim (feem ntau yog thaum qhov kub thiab txias ntawm transistor thiab transistor siab tshaj 200 degree, nws yuav kub hnyiab tau) thiab ua rau cov ntawv luam tawm los ntawm cov substrate; Lub zog ntawm cov hlau soldering siv tsawg dhau, lub solder tsis tuaj yeem yaj tag nrho, cov flux tsis tuaj yeem evaporate, cov pob qij txha tsis du thiab ruaj khov, thiab ua rau cov khoom cuav. Feem ntau, nws yog siv rau soldering integrated circuits, luam Circuit Court boards, CMOS circuits, decorating transistors, IC hom recorders, TVs, thiab ua tej yam zoo tib yam Circuit Court sim. Nws feem ntau pom zoo kom siv 20W. Rau kev kho cov tshuab nqus tsev vacuum, xws li cov tshuab biliary thiab cov cuab yeej qub, nws raug nquahu kom siv 35W, thaum rau cov cua sov sab nraud, nws raug nquahu kom siv 45W. Rau vuam cov xaim ntawm cov hloov pauv loj thiab cov kab tseem ceeb hauv av ntawm cov hlau substrates, sab hauv rhuab 50W thiab sab nraud rhuab 75W yog siv. Thaum vuam cov ntaub ntawv hlau, ib qho hluav taws xob hluav taws xob sab nraud uas muaj peev xwm tshaj 100W yuav tsum raug xaiv. Yog tias muaj kev tso cai, cov neeg nyiam siv xov tooj cua tuaj yeem tsim kho lawv tus kheej nrog 20W sab hauv rhuab, 35W sab hauv lossis sab nraud, thiab 150W sab nraud rhuab soldering hlau, uas tuaj yeem ua tau raws li ntau yam kev xav tau vuam.
Lub solder peb siv feem ntau muab faib ua ob hom: txhuas solder thiab lead-free solder, tab sis feem ntau siv yog txhuas solder, uas muaj 63% tin, 37% txhuas, thiab melting point ntawm 183 degree. Ntawm qhov tod tes, cov hlau tsis muaj hlau lead muaj cov ntsiab lus ntawm 99% tin, txog 1% flux, thiab melting point ntawm 227 degree. Qhov zoo ntawm cov hlau lead yog qhov tsis tshua muaj melting point, yooj yim soldering, tsis tshua muaj nqi, tab sis nws tsis yog ib puag ncig tus phooj ywg. Cov hmoov txhuas muaj teeb meem rau tib neeg lub cev, yog li tom qab vuam, nws yuav tsum tau ntxuav tes kom zoo. Thaum lub sij hawm vuam, nws yog qhov zoo tshaj rau hnav lub npog ntsej muag lossis qhov chaw ci ntsa iab kom ntseeg tau tias qhov kev ncua deb ntawm lub taub hau thiab qhov welded. Nrog rau kev paub txog kev tiv thaiv ib puag ncig ntawm tib neeg, cov hlau lead-dawb soldering yog tam sim no siv rau lub tshuab vuam hauv cov chaw tsim khoom. Vim lub siab melting point ntawm cov hlau lead-dawb solder, nws tsis yooj yim to taub vim li cas nws yog qee zaum nyuaj rau yaj 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 thaum muaj zog. Thaum lub sij hawm welding txheej txheem, ib tug hluav taws xob soldering hlau yog ib tug txheej txheem ntawm tshav kub conduction. Thaum nws los rau hauv kev sib cuag nrog lub vuam nto, lub tshav kub ntawm lub taub hau ntawm lub taub hau yog xa mus rau lub solder, uas absorbs lub tshav kub thiab melts, tsim ib tug kaj thiab du solder sib koom nyob rau hauv qhov chaw nro. Nyob rau hauv tus txheej txheem ntawm welding thaum tshav kub kub conduction, vim lub fact tias hlau yog zoo conductors ntawm tshav kub, 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 hau, nws qhov kub thiab txias yuav txo mus rau qee yam. Yog tias qhov chaw sib koom ua ke loj, nws yuav tsum tau nqus cov cua sov kom ntau dua kom cov solder nyob rau sab saum toj ncav cuag lub melting point. Yog tias qhov ntim ntawm lub taub hau ntawm lub taub hau me me, nws khaws cov cua sov tsawg, thiab qhov kub thiab txias poob sai sai. Vim lub zog me me ntawm cov tub ntxhais hlau soldering, cov cua sov tsim tawm tsis txaus 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. Hauv qhov xwm txheej no, peb yuav tsum xaiv lub zog hluav taws xob loj rau vuam. Ntawm qhov tsis sib xws, yog tias qhov welded yog me me, peb tsis tas yuav siv lub zog loj soldering hlau; Yog tias siv lub tshuab hluav taws xob muaj zog, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo saib xyuas lub sij hawm soldering, txwv tsis pub cov cua sov ntau dhau tuaj yeem ua rau muaj kev puas tsuaj rau lub rooj tsav xwm Circuit Court thiab Circuit Court board, uas ua rau lub detachment ntawm luam ntawv tooj liab ntawv ci. Tsis muaj ib qho kev xav tau tshwj xeeb rau lub zog tshwj xeeb ntawm cov hlau soldering, thiab kev sib sau ua ke ntawm kev ua haujlwm ntev los ntawm kev saib xyuas cov neeg ua haujlwm yog qhov zoo tshaj plaws los xaiv cov hlau soldering uas haum rau koj tus kheej.
