I-Lead-Free Solder vs. I-Lead Solder: Ukuqhathanisa Okuningiliziwe

Ngokwesiko, i-lead solder bekuyiyona ndlela yokuzikhethela ngenxa yokuguquguquka kwayo okuhle kakhulu kagesi kanye nephuzu elincibilikayo eliphansi. Kodwa-ke, ngokukhathazeka okukhulayo mayelana nokuphepha kwezempilo kanye nemvelo, i-solder-free solder iye yanda kakhulu. Le bhulogi icubungula ekuqhathaniseni okuningiliziwe phakathi komthofu kanye ne-solder engenamthofu, ihlola izakhiwo zayo, ukusetshenziswa, kanye nomthelela kukho kokubili inqubo yokukhiqiza kanye nendawo ezungezile ebanzi. Ukuqonda lo mehluko kubalulekile kubakhiqizi, abathanda ukuzilibazisa, kanye nochwepheshe ekwenzeni izinqumo ezinolwazi emisebenzini yabo yokudayisa.

Iyini i-Lead Solder?

I-lead solder iyingxube yensimbi ngokuyinhloko eyakhiwe ngomthofu (Pb) kanye ne-tin (Sn), enezingoma ezivame kakhulu ukuthi 60/40 (60% tin, 40% lead) noma 63/37 (63% tin, 37% lead). Le ngxubevange ethile ibilokhu iyisisekelo ekukhiqizeni izinto zikagesi amashumi eminyaka ngenxa yenhlanganisela yayo eyingqayizivele yezakhiwo ezilungele kahle izinqubo zokudayiswa.

Izimpawu Ezisemqoka Ze-Lead Solder

1. I-Low Melting Point: Esinye sezizathu eziyinhloko zokuthi i-lead solder isetshenziswe kabanzi kuma-electronics indawo yayo encibilikayo ephansi, ngokuvamile esukela ku-183°C kuya ku-190°C. Lokhu kushisa okuphansi kwenza inqubo ye-solder ibe lula, inciphisa ingozi yokulimala ezingxenyeni ezibucayi namabhodi wesifunda. Ingxube ye-eutectic eyakhiwe ngesilinganiso esingu-63/37 sikathayela nomthofu idala indawo encibilikayo efanayo, iqeda ukukhathazeka kobubanzi bokuncibilika obutholakala kwamanye ama-alloys e-solder.
2. Ikhono Eliphezulu Lokumanzisa: I-solder eholayo ihlonishwa kakhulu ngenxa yekhono layo lokusabalalisa ngokulinganayo futhi linamathele kahle ezinsimbi ngesikhathi senqubo yokuhlanganisa. Leli khono lokumanzisa liqinisekisa ukuthi i-solder igcwalisa igebe phakathi kwezingxenye kanye nama-pads abo nge-voids encane noma ukungapheleli, ukuhlinzeka ngokuxhumeka okuqinile, okuthembekile kagesi.
3. Kuhle Kakhulu Kagesi Conductivity: I-lead solder iyaziwa ngokusebenza kwayo kagesi okuhle kakhulu, okwenza kube ukukhetha okuhle kwezinhlelo zokusebenza lapho ukusebenza kukagesi kubaluleke kakhulu. Inhlanganisela ye-tin kanye nomthofu iqinisekisa ukuthi amalunga atholakalayo agcina ukuhanjiswa okuphezulu, okubaluleke kakhulu ekusetshenzisweni kwe-high-frequency kanye ne-low-resistance.
4. I-Ductility kanye nokuvumelana nezimo: I-lead solder nayo iyigugu ngenxa ye-ductility yayo, eyivumela ukuba ibambe ukucindezeleka komshini ngaphandle kokuqhekeka noma ukuphuka. Lesi sakhiwo sibalulekile ekuqinisekiseni ukuthi amalunga athengisiwe ahlala eqinile futhi esebenza kahle ngisho nangaphansi kwezimo zokunwetshwa kokushisa, ukudlidliza komshini, noma okunye ukucindezeleka.
5. Kalula Yokusebenzisa: I-solder yomthofu kulula ukuyiphatha uma iqhathaniswa nezinye izindlela ezingenamthofu. Ukugeleza kwayo okubushelelezi kanye nezinga lokushisa elincibilikayo eliphansi kuyenza isebenziseke ngokukhethekile kuzo zombili izinqubo zokuhlanganisa okwenziwa ngesandla nezizenzekelayo. Lokhu kusebenziseka kalula, kuhlanganiswe nokufinyeleleka kwayo nokusebenza ngempumelelo, kukwenze kwaba into ethandwayo yokudayiswa embonini yezogesi amashumi eminyaka.

Ukuhlaziywa Okuqhathaniswayo Kwezakhiwo Zomzimba ku-PCB Soldering

I-Melting Point

I-solder yomthofu igqamile nendawo yayo yokuncibilika ephansi cishe engu-183°C, yenza kube lula ukuphatha nokusebenzisa phakathi nezinqubo zokuhlanganisa i-PCB. Ngokuphambene, ama-solder angenawo umthofu, akhiwe ngama-alloys afana ne-tin, ithusi, nesiliva, ngokuvamile anezindawo zokuncibilika eziphakeme ezingaphezu kuka-217°C. Nakuba leli phuzu eliphakeme lokuncibilika lingase libe nezinselele ngesikhathi se-soldering, liqinisekisa ubuqotho obuhlangene obuqinile nokwethembeka ezimweni ezihlukahlukene zemvelo.

Ukuqina namandla

I-lead solder ibungazwa ukuqina kwayo kanye nezindawo zokumanzisa ezihlukile, iqinisekisa ukuxhumana okuthembekile kukagesi kuma-electronic assembles. Nokho, izicelo ngenkani high mechanical ukucindezeleka ukumelana, umthofu-free solder ngokuvamile ukudlula solder lead. Naphezu kokuba i-ductile encane, ezinye izindlela ezingenamthofu zibonisa amandla emishini aphakeme, athuthukisa impilo ende nokusebenza kwamalunga adayisiwe ngaphansi kwezimo zokusebenza ezinzima.

Lokhu kubuka konke okuqhathanisayo kugcizelela ukuhwebelana okubalulekile phakathi kwezinto ezithengiswa ngomthofu nezingenamthofu, eziqondisa izinqumo ezinolwazi ekukhiqizeni i-PCB ukuze kusebenze kahle nokwethembeka.

Imithelela Yezempilo Nemvelo Yokuhola vs. I-Lead-Free Solder Ekwenziweni kwe-PCB

Izingozi Zezempilo Ze-Lead Solder

I-lead solder iveza izingozi ezinkulu zezempilo, ikakhulukazi ezindaweni zezimboni lapho ukuchayeka kuvame kakhulu phakathi nezinqubo zokukhiqiza. Ukuchayeka isikhathi eside kuntuthu womthofu noma uthuli kungaholela ekuphazamisekeni okukhulu kwemizwa nokuphefumula, kube usongo olukhulu ekuphepheni nasekuphileni kahle kwabasebenzi. Ngenxa yalokho, imithetho eqinile nezinqubo zokuphepha ziyaphoqelelwa ukuze kuncishiswe lezi zingozi ezindaweni zokusebenza lapho kusetshenziswa khona i-lead solder.

Ukukhathazeka Kwemvelo Ngomthofu

Umthelela wemvelo womthofu udlulela ngalé kokukhathazeka ngempilo yabantu. Ukulahlwa kanye nokugaywa kabusha kwezinto zikagesi eziqukethe i-lead solder kunomthelela ezinseleleni zikadoti kagesi, ezingase zingcolise inhlabathi namanzi angaphansi komhlaba ngezinsalela ezinobuthi. Lokhu kungcoliswa kubeka engcupheni i-ecosystem kanye nenani labantu ngokufanayo, okudinga ukuphathwa ngokucophelela kanye nezinqubo zokulahla ukuze kuncishiswe ukulimala kwemvelo.

Izinzuzo Solder-Free Umthofu

Ngokuphambene nalokho, ukwamukelwa kwe-solder engenalo i-lead kuphawula ushintsho olubalulekile oluya emikhubeni yokukhiqiza izinto zikagesi ephephile futhi eqhubekayo. Izakhi ze-solder ezingenalo i-lead zivame ukufaka izinsimbi ezifana ne-tin, ithusi, nesiliva, ezingenawo okuqukethwe yi-lead okunobuthi. Lolu shintsho luhambisana nezinhlelo zomhlaba wonke ezifana nesiqondiso se-Restriction of Hazardous Substances ( RoHS ), esihlose ukunciphisa izinto eziyingozi emishinini kagesi neye-elekthronikhi. Ngokususa i-lead, i-solder engenalo i-lead inciphisa izingozi zempilo kubasebenzi futhi inciphise ukungcoliswa kwemvelo, isekela imizamo yeplanethi eluhlaza nenempilo.

Umehluko Wohlelo

Izicelo ze-Lead Solder

I-solder yomthofu ithandwa ngokwesiko ezinhlelweni ezidinga izinga lokushisa eliphansi lokuncibilika kanye ne-ductility ephezulu. Ivamise ukusetshenziswa emishinini ye-elekthronikhi emidala nasezinhlelweni ezithile ezikhethekile lapho izakhiwo zayo ezihlukile zinenzuzo.

Izicelo Ze-Solder Esingenamthofu

I-solder engenawo umthofu iya ngokuya isetshenziswa ekukhiqizeni izinto zikagesi zesimanjemanje, ikakhulukazi kuma-electronics abathengi, ukuze ihambisane nemithetho yezempilo neyemvelo. Kuyakhethwa futhi ezinhlelweni zokusebenza lapho ukwethembeka kwesikhathi eside kanye nomthelela oncishisiwe kwezemvelo kuwukucatshangelwa okubalulekile.

Ukucatshangelwa Kwezindleko ku-PCB Soldering: I-Lead vs. I-Lead-Free Solder

Izindleko ze-Lead Solder

I-lead solder isalokhu inenzuzo kwezomnotho ekwakhiweni kwe-PCB ikakhulukazi ngenxa yokutholakala kabanzi kanye nezindleko eziphansi ze-lead. Ukusetshenziswa kwayo isikhathi eside embonini kuye kwenza izinqubo zokukhiqiza zaba lula futhi kwaba negalelo ekuthengeni kwayo kalula. Lokhu kusebenza kahle kwezindleko kwenza i-lead solder ibe yisinqumo esikhethwayo ezisetshenziswayo lapho imikhawulo yesabelomali ibaluleke kakhulu, naphezu kokukhathazeka kwayo ngezempilo kanye nemvelo.

Izindleko Zokudayisa Ezingakhokhelwa Umthofu

Ngakolunye uhlangothi, i-lead-free solder ivame ukubiza kakhulu uma iqhathaniswa ne-lead solder. Lezi zindleko eziphezulu zibangelwa izici eziningana, kuhlanganise nokusetshenziswa kwezinye izinsimbi njengesiliva noma ithusi kuma-alloys e-solder. Lezi zinsimbi zibiza kakhulu kunomthofu, zinomthelela ezindlekweni zezinto ezibonakalayo ekukhiqizeni i-solder engenamthofu. Ngaphezu kwalokho, inqubo yokukhiqiza ye-solder engenamthofu ingaba nzima kakhulu futhi isebenzise kakhulu izinsiza, ibe nomthelela ephuzwini layo lentengo eliphakeme.

Naphezu kwezindleko zayo eziphakeme, ukwamukelwa kwe-solder engenamthofu kuya ngokuya kugunyazwa noma kuthandwa ezindaweni eziningi ngenxa yemithetho yemvelo (efana nokuthobela i-RoHS) nokucatshangelwa kwezempilo. Ukushintshela kwezinye izindlela ezingenawo umthofu kubonisa ukuzibophezela ekwehliseni izinto eziyingozi emikhiqizweni ye-elekthronikhi, okuhambisana nezinhlelo zokusimama komhlaba.

Sekukonke, yize i-lead solder inikeza izinzuzo zomnotho, izindleko eziphezulu ze-lead-free solder zivunyelwe yizinzuzo zayo zemvelo kanye nokuhambisana nemithetho. Abakhiqizi kumele bahlole ngokucophelela lezi zindleko kanye nezidingo zokusebenza kanye nezibopho zomthetho lapho bekhetha izinto zokunamathisela ze -PCB.

Isiphetho

Ukukhetha phakathi kwe-solder engenamthofu kanye ne-lead-free kuncike ezicini ezihlukahlukene ezihlanganisa izidingo zohlelo lokusebenza, ukuhambisana nemithetho yezempilo neyemvelo, nokucatshangelwa kwezindleko. Nakuba i-lead solder ithandwa ngenxa yokusebenziseka kwayo kalula nendawo encibilikayo ephansi, ubungozi bezempilo kanye nomthelela wemvelo kuyizithiyo ezinkulu. I-solder engenamthofu, naphezu kokuba kubiza kakhulu futhi inephuzu eliphakeme lokuncibilika, iya ngokuya iba yindinganiso embonini, eqhutshwa izindinganiso zokulawula kanye nokukhathazeka kokuphepha. Ekugcineni, isinqumo kufanele sisekelwe ezidingweni ezithile zephrojekthi, ukulinganisa ukusebenza, ukuhambisana, nezici zezindleko.

Imibuzo Evame Ukubuzwa

Yiziphi izinzuzo eziyinhloko zokusebenzisa i-solder yamahhala ekuhlanganiseni kwe-PCB?

I-solder engenamthofu inikeza izinzuzo ezibalulekile zezempilo nezemvelo, ukunciphisa izingozi ezihlobene nokuchayeka komthofu ekukhiqizeni. Iphinde ihambisane namazinga okulawula afana ne-RoHS, efaka isandla ekukhiqizweni kwama-elekthronikhi aluhlaza.

Iphuzu eliphakeme lokuncibilika le-solder-free solder liyithinta kanjani inqubo yokunamathisela?

Iphuzu eliphakeme lokuncibilika le-solder elingenawo umthofu lingenza kube inselele kakhulu ukusebenza nalo, okudinga ukulawula okunembe kakhudlwana kwamazinga okushisa e-solder. Kodwa-ke, ukuthuthuka kwemishini yokuthengisa kanye namasu kwenze le nselele yaba lula ukuyiphatha.

Imaphi ama-alloys angenawo umthofu angcono kakhulu wezinhlelo zokusebenza ezinokwethenjelwa okuphezulu?

Ama-alloys afana ne-SAC305 (Sn-3Ag-0.5Cu) ajwayele ukusetshenziselwa izinhlelo zokusebenza ezinokwethenjelwa okuphezulu ngenxa yamandla azo aphezulu, izakhiwo zemishini, nokusebenza okushisayo. Lawa ma-alloys ahlinzeka ngobuqotho obuhlangene obuhle kakhulu ngisho nangaphansi kwezimo ezinzima.

Kungani i-lead solder isasetshenziswa ezinhlelweni ezithile naphezu kwezingozi zayo zempilo nezemvelo?

I-solder yomthofu isasetshenziswa kwezinye izinhlelo zokusebenza lapho indawo yayo yokuncibilika ephansi, ukusetshenziswa kalula, kanye nokuhamba kahle kukagesi kubalulekile. Futhi kubiza kakhulu, okuyenza ibe inketho ekhangayo kumaphrojekthi azwela isabelomali noma lawo angekho ngaphansi kwemithetho eqinile.

Ngabe intuthuko kubuchwepheshe be-solder obungenamthofu buthinta kanjani izindleko zayo uma kuqhathaniswa ne-lead solder?

Ukuthuthuka kwama-alloys angenawo umthofu we-solder kanye nezinqubo zokukhiqiza kunciphisa kancane kancane igebe lezindleko phakathi kwe-lead-free kanye ne-lead solder. Nakuba i-solder engenamthofu isabiza kakhulu, ukusetshenziswa kwayo okwandayo nokusebenza okuthuthukisiwe kwenza kube ukukhetha okungabizi kakhulu kwezinhlelo zokusebenza eziningi ngokuhamba kwesikhathi.