Thaum lub sijhawm txheej txheem soldering, muaj qee lub sijhawm uas yuav tsum tau muaj qhov kub thiab txias. Qhov no tshwm sim hauv kev tsim cov microcircuits lossis hauv cov xwm txheej uas muaj kev pheej hmoo ntawm overheating ntawm microelectronic cov ntsiab lus, tab sis lub zog siab tsis tas yuav tsum muaj. Rose alloy yog qhov haum tshaj plaws rau cov hom phiaj no.
Nyob ib pliag
Roze alloy muaj:
- bismuth 50%;
- lead 25%;
- tin 25%.
Kev kam rau qhov sib piv yog ± 0.5%. Nyob rau hauv cov nqe lus ntawm lub cev tsis muaj zog, no solder yog ze rau Wood's alloy, tab sis muaj tsawg toxicity vim tsis muaj cadmium nyob rau hauv nws muaj pes tsawg leeg, yog li nws yog tsim nyog rau siv hauv tsev. Nws tsis tas yuav muaj cov khoom siv nrog lub fume hood ntawm qhov chaw ua haujlwm.
Lub ntsiab lus melting ntawm Rose alloy yog +94 ° C. Nws hardens twb ntawm +93 ° C. Xws li ib tug kub tswj yog ntse siv rau tinning boards nrog Rose alloy. Hauv tsev, cov txheej txheem no tuaj yeem nqa tawm hauv dej npau npau. Tab sis nws yuav tsum nco ntsoov tias qhov no alloy yog rhiab heev rau overheating, ntxiv rau, nwsyooj yim txaus.
Rose alloy, nws yog dab tsi thiab vim li cas nws thiaj li hu ua? Lub solder yog lub npe hu ua tom qab nto moo German chemist Valentin Rose, Sr., thiab yog ib tug me me, silver-xim granule los yog pas nrig.
Cov ntaub ntawv dab tsi yog siv rau kev sib tsoo?
Soldering nrog cov muaj pes tsawg leeg zoo sib xws pab txhawb kev sib txuas ntawm qhov kub thiab txias tseem ceeb ntawm cov khoom siv hauv xov tooj cua thiab cov ntsiab lus hauv microelectronics vim qhov kub tsis tshua muaj melting. Nws yog siv nyob rau hauv kev lag luam raws li solder ntawm POSM-50 hom. Cov khoom no tau ua tiav cov tooj liab, nws cov alloys nrog txhuas, npib tsib xee, tooj dag, nyiaj-plated nto ntawm cov khoom siv ceramic, cov hlau muaj txiaj ntsig.
Boiling water tinning technology
Vim yog qhov tshwj xeeb ntawm qhov kub thiab txias hauv tsev, cov cuab yeej hauv qab no rau tinning luam ntawv Circuit Court boards siv Rose alloy tau tsim. Nws yog dab tsi thiab nws ua haujlwm li cas?
Ua ntej ntawm tag nrho, koj yuav tsum tau ntxuav cov etched tooj liab ntawm PCB.
Tom qab ntawd kub ib lub thawv me me uas muaj cov hlau uas muaj dej (lub tais los yog lub lauj kaub) kom kub. Ib lub kaus poom loj kuj tsim nyog. Muab cov citric acid me me rau hauv dej npau.
Tom qab ntawd, maj mam txo cov ntawv luam tawm rau hauv qab ntawm lub thawv nrog cov tin saum npoo. Tus naj npawb ntawm cov granules ntawm Rose alloy poob qab nws. Tom qab ntawd, nyob rau hauv boiling dej, molten granules yog faibsib npaug nrog ib tug ntoo stick los yog roj hmab spatula rau ntawm tooj liab ntawm lub rooj tsavxwm. Hauv qhov no, txheej txheem tinning tshwm sim.
Cov khoom siv ntau dhau raug muab tshem tawm nrog lub swab lossis spatula. Tom qab ntawd, lub tinned board raug tshem tawm los ntawm lub thawv thiab tso cai rau txias. Qhov tshwm sim yog lub ci ci, yuav luag zoo li daim iav zoo li tinned nto uas zoo li cov qauv kev lag luam.
txhawm rau txhawm rau txuas ntxiv nrog Rose alloy kom muaj lub zog txaus thiab tsis nkig, nws yog qhov tsim nyog kom ua tiav qhov tsawg kawg nkaus thickness ntawm tinning txheej. Tom qab ntawd, nws yog ib qho tsim nyog yuav tsum tau yaug qhov saum npoo ntawm lub rooj tsavxwm nrog dej kom tshem tawm cov kua qaub seem. Txhawm rau txo oxidation ntxiv, nws yog qhov tsim nyog los npog nws nrog ib txheej ntawm cov kua dej cawv ntawm rosin. Nws yuav tiv thaiv kev nkag mus ntawm cov pa oxygen mus rau cov hlau nto thiab yuav ua raws li cov dej ntws thaum lub sij hawm soldering, kom ntseeg tau tias qhov zoo ntawm kev sib txuas.
Technique ua haujlwm nrog glycerin
Muaj txoj hauv kev tinning hauv glycerin nrog Rose alloy. Nws yog dab tsi thiab yuav npaj cov txheej txheem li cas? Rau tinning, nws yog ntshaw kom siv lub thawv hlau enameled, piv txwv li, lub tais. Nws yog ib nrab puv nrog glycerin los ntawm lub tsev muag tshuaj ze tshaj plaws thiab ua kom sov rau qhov kub ntawm li 200 ° C. Ntxiv ob peb tee ntawm soldering acid rau cov kua. Tsis tas li ntawd, lub rooj tsavxwm tau txo qis rau hauv cov rhuab glycerin nrog ib txheej tooj liab stripped. Los ntawm saum toj no, pellets ntawm Rose's alloy raug pov tseg. Tom qab ntawd, nrog cov roj hmab spatula, melted hlau pobrubbed rau ntawm tooj liab nto ntawm lub rooj tsavxwm. Tom qab ntawd, lub workpiece yog ua tib zoo tshem tawm nrog tweezers thiab huv si ntxuav nrog dej khiav los ntawm acid thiab glycerin. Lub ci tinned nto yog them nrog ib txheej ntawm cawv-raws li rosin tov. Tom qab ntawd, lub rooj tsavxwm tau npaj siv.
Simplified tinning technology
Tsis muaj lub siab xav mus ncig nrog cov thawv hlau, boiling thiab acid, ib tug xov tooj cua amateur tuaj yeem tin lub rooj tsavxwm luam tawm hauv txoj kev yooj yim tshaj plaws. Tinning nyob rau hauv cov ntaub ntawv no kuj yog nqa tawm nrog Rose alloy. Nws yog dab tsi thiab nws ua li cas? Cov ntawv ci tooj liab ntawm lub rooj tsav xwm luam tawm yog ntxuav nrog cov ntawv xuab zeb thiab coated nrog cov kua dej cawv ntawm rosin, uas yog hu ua kua flux. Tom qab ntawd, nws yog ib qho tsim nyog yuav tsum tau muab qhov xav tau ntawm Rosé alloy granules rau ntawm cov tooj liab ntawm lub rooj tsavxwm thiab siv lub tshuab hluav taws xob qis kom ua tiav cov txheej txheem tinning los ntawm fluffy braid ntawm coaxial cable. Tom qab ntawd ntxuav tawm cov seem ntawm cov dej cawv siv nrog cawv thiab npog nrog cov kua dej cawv ntawm rosin ua ib hom tshuaj tiv thaiv.
Qhov zoo thiab qhov tsis zoo ntawm tinning technologies
Txhua txoj kev no muaj nws qhov zoo thiab qhov tsis zoo. Tinning nyob rau hauv boiling dej yog qhov zoo dua vim hais tias ntawm qhov kub thiab txias (txog +100 ° C). Nws muab qhov zoo tshaj plaws tinned nto, tsis ua rau cov kab nyias nyias ntawm cov laug cam thiab etched inscriptions.
Thaum ua haujlwm hauv glycerin rhuab mus rau 200 ° C, tau txais cov txheej txheem zoo sib xws. Tab sis tib lub sij hawm muaj kev phom sij ntawm kev kub hnyiab los ntawm cov kua roj uas muaj roj kub. Vapors ntawm glycerin kuj tsis pab txhim kho kev noj qab haus huv ntawm xov tooj cua amateur. Tsuas yogTsis tas li ntawd, nws yuav tsum nco ntsoov tias thaum lub cev qhuav dej glycerin yog overheated, acrolein tshwm, uas belongs rau qib 1 ntawm kev phom sij thiab muaj zog carcinogenic zog.
Tinning nrog cov hlau soldering yog yooj yim dua thiab sai dua, tab sis muaj qhov txaus ntshai ntawm overheating nrog tev ntawm cov ntawv ci thiab cov ntawv sau rau ntawm lub rooj tsav xwm luam tawm.
Ua Rose Alloy DIY
Nws tsis tuaj yeem yuav cov khoom tsim nyog txhua lub sijhawm. Hauv qhov no, koj yuav tsum sim ua rau lawv tus kheej. Yuav kom tau txais ib qho hlau, nws yog ib qho tsim nyog, ua ntej ntawm tag nrho cov, muas bismuth. Hloov cov tin ntshiab, koj yuav tau siv cov tin-lead solder, vim cov hlau ntshiab tsis tuaj yeem ib txwm tau. Ib txwm solder yog hais txog 40% txhuas thiab 60% tin. Nws yog ib qho tsim nyog yuav tsum tau muab ib daim ntawm solder thiab ib daim ntawm bismuth raws nraim tib yam hauv ntim. Sib tov tag nrho cov khoom nyob rau hauv lub crucible thiab yaj nrog ntxiv ntawm rosin flux. Tom qab ntawd maj mam ncuav lub molten solder rau hauv ib lub thawv dej nyob rau hauv ib tug nyias kwj. Rose alloy granules yuav tsim rau hauv qab. Ntawm chav kawm, txoj kev no tsis yog tag nrho, yog li qhov feem pua ntawm cov hlau yuav tsis zoo heev, nrog rau cov ntsiab lus melting. Rau qhov tseeb alloy, Rose yuav xav tau tshuaj dawb huv tin, txhuas thiab bismuth.
Kev nyab xeeb thiab ceev faj
Txawm hais tias Rose alloy tsis muaj cadmium, nws cov khoom (tshuaj txhuas thiab bismuth) tuaj yeem ua rau muaj kev tsis haum tshuaj lossis qaug cawv. Yog li ntawd, nws yog qhov zoo dua los khaws cov hlau rau hauv ib lub pob kaw nruj nreem. Lub txee lub neej ntawm cov khoom xyaw yog txog 3 xyoos. Thaum soldering thiab tinningyuav tsum tau saib xyuas kev nyab xeeb. Ua hauj lwm nyob rau hauv ib qho chaw ventilated. Tsis txhob ua pa ntawm cov hlau lead, tin thiab bismuth. Cov pa taws ntawm rosin thiab glycerin kuj tsim teeb meem. Thaum ua hauj lwm nrog lub rhuab crucible, cov cuab yeej tiv thaiv yuav tsum muaj nyob rau hauv daim ntawv ntawm cov hnab looj tes tuab thiab tsom iav.
