SMT reflow ovenngenitrogen (N2) yeyona ndima ibalulekileyo ekunciphiseni ukuwelda umphezulu oxidation, ukuphucula ukumanzisa ukuwelda, kuba initrogen luhlobo lwegesi inert, akukho lula ukuvelisa iikhompawundi ngentsimbi, nako ukunqumla ioksijini emoyeni. kunye noqhagamshelwano lwesinyithi kwiqondo lokushisa eliphezulu kunye nokukhawulezisa ukusabela kwe-oxidation.
Okokuqala, umgaqo wokuba i-nitrogen inokuphucula i-SMT weldability isekelwe kwinto yokuba ukunyanzeliswa komphezulu we-solder phantsi kwe-nitrogen bume bungaphantsi kwaloo nto ibonakaliswe kwimeko ye-atmospheric, ephucula ukumanzi kunye nokumanzi kwe-solder.
Okwesibini, i-nitrogen inciphisa ukunyibilika kweoksijini kumoya wokuqala kunye nezinto ezinokungcolisa umphezulu we-welding, inciphisa kakhulu i-oxidation ye-solder yobushushu obuphezulu, ngakumbi ekuphuculeni umgangatho we-backwelding yecala lesibini.
I-Nitrojeni ayilonyango lwe-PCB oxidation.Ukuba umphezulu wecandelo okanye ibhodi yesiphaluka i-oxidized kakhulu, i-nitrogen ayiyi kuyibuyisela ebomini, kwaye i-nitrogen iluncedo kuphela kwi-oxidation encinci.
Izinto ezilungileyo zesolder reflow ovenngenitrogen:
Ukunciphisa i-oxidation yesithando somlilo
Ukuphucula umthamo we-welding
Ukwandisa ukuqina
Nciphisa izinga lomgodi.Ngenxa yokuba i-solder paste okanye i-solder pad oxidation iyancitshiswa, ukuhamba kwe-solder kungcono.
Ukungalungi kweUmatshini wokuthengisa we-SMTngenitrogen:
ukutshisa
Yandisa ithuba lokuvelisa ilitye lengcwaba
I-capillarity eyandisiweyo (isiphumo sewick)
Ixesha lokuposa: Aug-24-2021