1. Rose-scented ham muab tshuaj:
Rosin tau yog qhov tseem ceeb ua haujlwm hauv ham muag txij thaum nws pib. Rosin tau siv nyob rau hauv ham muab tshuaj txhuam txawm tias tsis muaj cov huv huv muab tshuaj vim nws muaj ntau yam zoo. Rosin muaj qhov ua tau zoo weldability, thiab qhov seem ntawm rosin tom qab vuam muaj cov yeeb yaj kiab zoo-tsim muaj peev xwm, muaj kev tiv thaiv ntawm vuam chaw, qee zaum txawm tias tsis tau ntxuav, yuav tsis muaj qhov tshwm sim corrosion. Hauv kev tshwj xeeb, rosin muaj qhov ua haujlwm ntawm kev ua kom ntau ntxiv kev nplaum, yob muab tshuaj txhuam luam ntawv tuaj yeem ua raws cov nti ua ke, tsis yooj yim los tsim qhov chaw tsis sib xws, ntxiv rau, rosin tau yooj yim sib xyaw nrog lwm yam, tuaj yeem ua lub luag haujlwm ntawm kev kho viscosity, kom hlau hmoov nyob rau hauv ham muab tshuaj tsis yog yooj yim nag lossis daus thiab txheej. Ntau hom cam muab tshuaj txhuam siv cov rosin hloov pauv, xws li KoKi muab tshuaj txhuam, uas muaj xim xim nrog ci ci thiab muaj xim zoo nkauj.
2. dej-soluble ham muab tshuaj txhuam
Vim tias rosin solder paste qee zaum yuav tsum siv tshuaj ntxuav kom huv si tom qab siv, kom tshem tawm cov khoom seem, rosin nrog cov tshuaj ntxhua khaub ncaws tsis huv (CFC - 113), nrog kev txhim kho ntawm kev paub txog ib puag ncig, fluorine chlorine hydrocarbons tau pom tias muaj kev puas tsuaj ntawm cov cua. ozone txheej, tau txwv los ntawm Montreal convention xiam oob khab, dej soluble solder muab tshuaj txhuam tau yoog raws li qhov xav tau ntawm kev tiv thaiv ib puag ncig thiab kev txhim kho ntawm cov muab tshuaj txhuam.
Dej-soluble ham muab tshuaj yog ua tiav zoo li ntoo thuv tsw ham muab tshuaj nyob rau hauv muaj pes tsawg leeg thiab qauv. Nws cov pes tsawg leeg suav nrog SnPb hmoov thiab muab tshuaj txhuam flux. Tab sis nyob rau hauv tus muab tshuaj txhuam flux yog hloov los ntawm lwm cov teeb meem organic rosin, tom qab vuam tuaj yeem siv ncaj qha hauv 50 ℃ ~ 60 ℃ cov dej ntshiab rau ntxuav, thiaj li yuav tshem cov khoom seem tom qab vuam.
3.Tsis tu thiab qis residue ham muab tshuaj:
Tsis muaj-ntxuav qis qis qis roj nplaum tso tawm kuj tseem tsim kom tau raws li cov kev xav tau ntawm kev tiv thaiv ib puag ncig, raws li lub npe tau qhia, nws tsis tas yuav tsum ntxuav tom qab welding. Qhov tseeb, nws tseem muaj qee qhov nqi ntawm cov seem tom qab vuam, thiab cov seem yog tsuas yog nyob rau hauv cheeb tsam solder, thiab qee zaum tseem cuam tshuam rau kev kuaj lub txaj kuaj kom paub meej.
Muaj ob qho kev ua haujlwm ntawm qhov tsis huv-qis qis-residue ham muab tshuaj. Ib qho yog surfactant tsis siv halogens ntxiv. Qhov thib ob yog kom txo qis rosin, nce ntau ntawm lwm cov organic tshuaj. Kev xyaum qhia tau hais tias qhov txo qis ntawm rosin ntau npaum li cas, vim tias thaum rosin ntau npaum li cas tsawg txaus, nws yuav zam dhau qhov kev ua haujlwm ntawm flux thiab txo qhov tshwm sim ntawm kev tiv thaiv oxidation theem nrab hauv qhov chaw vuam.
Yog li, thiaj li ua tiav lub hom phiaj ntawm kev ua kom huv dawb, nws feem ntau yuav tsum tau siv cov roj nitrogen tsis muaj viav vias thaum siv vuam dawb thiab cov khoom seem qis. Nitrogen tiv thaiv vuam tuaj yeem txhim kho txoj kev ntub dej ntawm cov tshuaj pleev xim thiab tiv thaiv cov oxidation theem nrab hauv cov chaw vuam.
Feem ntau, kev ua tib zoo kuaj thiab ntsuas cov khoom ntawm cov khoom ua kom huv si, tsis muaj kuab qis qis qis yuav tsum tau nqa tawm kom ntseeg tau tias tsis muaj qhov tsis zoo ntawm cov khoom siv hluav taws xob ntawm PCB kev sibtham tom qab vuam. Txawm li cas los xij, nyob rau hauv cov ntaub ntawv ntawm cov khoom lag luam qib siab, cov tshuaj txhuam huv huv yuav tsum tau ntxuav txhua lub sijhawm kom ntseeg tau tseeb ntawm cov khoom.
4. tsis pub ham ham muab tshuaj:
Piv nrog sn - Pb ham muab tshuaj, tsis tsuas yog cov tshuaj muaj pes tsawg leeg xwb tab sis kuj tseem yog qhov muab tshuaj hloov nplaim.
Cov hmoov lead uas tsis muaj hmoov dawb li
Raws li txoj kev xav, txhua txoj kev tsim cov hmoov txhuas tsis muaj hmoov txhuas tuaj yeem tsim cov tshuaj txhuas tsis pub dawb cov hmoov txhuas thiab npaj rau cov tshuaj txhuas tsis muaj cov hmoov txhuas, tab sis cov tshuaj txhuas txhuas uas tsis muaj cov hmoov txhuas tsuas yog hloov kho los ntawm SnAgCu series thiab SN-0.7Cu. Tam sim no, SnAgCu nrog cov ntsiab lus Ag tsawg lossis hloov kho los ntawm cov khoom tsis tshua muaj thiab SN-0.7Cu cov hlau lead tsis muaj txhuas yog qhov xav tau, xws li SN-3.0 ag-0.5C, SN-3.0 ag-0.5Cu Hauv, Sn-3.0 ag-. 5Cu-0.5CO, Sn (0.5-1.0) Ag-0.5C + X, Sn-0.7Cu (Ni) Ge, thiab lwm yam Hauv xyoo tsis ntev los no, sn-0.7Cu hmoov txhuas tsis pub hloov kho los ntawm cov khoom tsis tshua muaj tau siv ntau thiab ntau zaus.
Tsis muaj teeb meem dab tsi ntawm cov hlau lead-dawb alloy hmoov yog, tsis muaj. 3 hmoov thiab No. 4 hmoov tseem siv tau. Cov duab ntawm cov hmoov txhuas txhua qhov tseem yog spherical, thiab cov pa ntsiab lus yog tswj tau qis dua 100 × 10-6.
Muab cov nplai flux
Muab tshuaj txhuam flux muaj pes tsawg leeg ntawm cov hlau lead uas tsis muaj cov tshuaj txhuam tsis tau hloov, uas yog, cov tshuaj txhuam flux tseem muaj cov rosin lossis lwm cov resins, thixotics, cov neeg sawv cev nquag, cov kuab tshuaj, luam ntawv AIDS, tshuaj tua kab mob, tab sis ntau yam muaj pes tsawg leeg tau hloov, qhov no yog vim tias reflow vuam kub ntawm cov hmoov txhuas uas tsis muaj cov hmoov txhuas muab tshuaj yuav luag ze li 30 ℃ siab dua qhov uas tsis muaj txhuas. Noj SnAgCu ua piv txwv, lub zog qhov kub yog 245 ℃ ~ 255 ℃ siab dua, cov khoom qub (xws li rosin, solvent, surfactant) tsis haum rau qhov kub siab, txwv tsis pub lub rosin yuav daj lossis txawm tias carbonized, thiab surfactant yuav decompose thiab swb ntxov. Yog li no, rosin-kub-resistant resistant thiab cov kuab tshuaj nrog kub dua cov taw tes yuav tsum tau siv. Ntawm ib sab tes, vim tsis tshua muaj cov hmoov lead-free alloy weldability, extensibility qis, yuav tsum txhim kho kev ua haujlwm ntawm flux hauv surfactant thiab ntau npaum li cas, tab sis vim yog cov hlau lead tsis muaj cov ntsiab lus ntau hauv cov alloy tau nce los ntawm 63% mus txog 96 %, nce kev ua ntawm hmoov txhuas tsis pub cov hmoov ua kua los ntawm, yog tias qhov hloov ntawm cov surfactant sib xyaw tom qab cam muab tshuaj tso kev ua tau zoo dhau los ua lub neej luv luv, yog li ntawd, flux ntawm surfactant yuav tsum tau nyeem dua.Peb xav txog yog tias txhuas yog hom ntawm cov hlau nrog nws tus kheej zoo thiab lub siab tuab. Tsis muaj hmoov txhuas nyob hauv cov hlau lead tsis muaj txhuas. Kev siv tus kheej ntawm cov nplaum muab tshuaj txhuam zuj zus thiab qhov chaw ntom nti ua ntais, uas txhua qhov cuam tshuam kev ua tiav luam ntawv ntawm qhov muab tshuaj txhuam. Vim tias cov kev hloov ntawm cov khoom tau hais los saum toj no, kev tsim cov hmoov txhuas tsis pub muag cov nyom yog qhov nyuaj heev. Qhov tseeb, thaum ntxov ua tsis muaj cov kav dej txhuas ua rau tag nrho cov teeb meem saum toj no, xws li qhov tshwm sim ntawm lub qhov thaiv thaum lub sijhawm luam ntawv, nplaum scraper, ya hlaws tom qab vuam, tsis muaj lub cev ntub ntawm cov phaj cam, thiab lwm yam, yog li peb yuav tsum ua tib zoo ntsuas xaiv los ntawm cov hlau lead tsis pub ham.