Solder pastes yog cov tshuaj zoo li cov tshuaj uas siv los kho qhov chaw ntawm lub rooj tsav xwm luam tawm. Lawv muaj qee qhov zoo, qhov tsis zoo thiab daim ntawv thov nta.
Qhov txiaj ntsig thiab ntau yam ntawm cov khoom nthuav tawm
Cia peb saib cov txiaj ntsig ntawm cov tshuaj txhuam hniav:
- muaj peev xwm siv lawv rau kev tsim cov laug cam nrog qhov me me;
- lawv tsis xav tau cov hlau nplaum, txawm li cas los xij, ua haujlwm nrog cov khoom siv no, koj yuav xav tau lub tshuab plaub hau tshwj xeeb lossis chaw nres tsheb, ua tsaug rau cov khoom sov so;
- cov tshuaj no tuaj yeem siv rau hauv cov xwm txheej uas nws tsis tuaj yeem ua haujlwm nrog cov cuab yeej ua haujlwm.
Solder pastes tuaj ntau yam. Ua ntej tshaj plaws, lawv raug cais raws li txoj kev tshem tawm cov khoom siv ntau dhau tom qab ua haujlwm: ntxuav thiab tsis huv. Qhov kev xaiv thib ob yog kev nyab xeeb dua, vim nws tsis ua rau corrosion ntawm lub rooj tsavxwm. Thawj hom pastes tuaj yeem ntxuav tawm nrog dej, yog li lawv muaj cov khoom siv uas tuaj yeem ua rau lub xov tooj cua ua phem.
Nws tseem yuav tsum tau sau tseg tias cov khoom tuaj yeem ua nrog lossis tsis muaj txhuas. Thib ob hom pasteyog ib puag ncig tus phooj ywg.
Yuav xaiv thiab khaws cov khoom li cas?
Yuav kom txoj hauj lwm ua tau zoo thiab raug, koj yuav tsum tau yuav cov "txoj cai" solder pastes. Ua ntej tshaj plaws, koj yuav tsum xyuam xim rau cov yam ntxwv ntawm cov khoom: av noo thiab huab cua kub, cia nta.
Cov khoom uas nthuav tawm tuaj yeem poob nws qhov zoo nyob ntawm kev laus. Qhov kev xaiv nyob ntawm hom muab tshuaj txhuam thiab nws cov peev txheej. Lawm, qhov tseem ceeb tshaj plaws yog tus nqi ntawm cov khoom siv. Solder paste, luv nqi ntawm ib ncig $10 rau 50 grams lossis ntau dua, tsuas yog muaj los ntawm cov khw muag khoom muaj ntawv pov thawj.
Txog kev khaws cov khoom, nws yuav tsum tau muab tso rau hauv lub tub yees, qhov kub thiab txias tsis nce siab tshaj 4 degrees. Thaum siv, chav tsev yuav tsum sov, tab sis tsis kub (tsis ntau tshaj 25 0 C). Humidity yuav tsum tsis txhob ncav cuag 80%. Ua ntej siv cov khoom, nws yog ib qhov tsim nyog kom sov nws mus rau chav tsev kub thiab tsuas yog tom qab ntawd qhib lub hub. Qee zaum nws tuaj yeem siv sijhawm txog 6 teev.
Cov yam ntxwv ntawm daim ntawv thov khoom
Soldering nrog solder paste muaj nws tus kheej nuances. Piv txwv li, qhov chaw ntawm cov khoom siv yuav tsum yog huv si, qhuav thiab tsis muaj roj. Lub rooj tsavxwm rau lub sijhawm ua haujlwm yuav tsum tau kho kom ruaj khov li sai tau hauv txoj haujlwm kab rov tav.
Qhov chaw yuav tsum tau muab npog tag nrhoyam khoom. Tom qab ntawd, sim tso tag nrho cov ntsiab lus tsim nyog ntawm lub rooj tsavxwm kom raug. Tam sim no koj tuaj yeem pib cua sov cov khoom nrog lub tshuab ziab plaub hau. Lub dav hlau yuav tsum tsis txhob muaj zog heev. Nws kub yuav tsum yog li 150 degrees kom txog thaum tag nrho cov flux tau evaporated los ntawm muab tshuaj txhuam. Tom qab ntawd, lub dav hlau tuaj yeem ua kom kub (200-250 0 C).
Tom qab txhua txoj haujlwm tiav lawm, lub rooj tsavxwm yuav tsum tau txias thiab ntxuav cov seem ntawm cov khoom. Cov txheej txheem no nyob ntawm hom muab tshuaj txhuam.
