Xa kuziwa kwiibhodi zeesekethe eziprintiweyo, asinakulibala indima ebalulekileyo yezinto ezincedisayo.Okwangoku, eyona isetyenziswa ngokuqhelekileyo i-tin-lead solder kunye ne-lead-free solder.Eyona idumileyo yi-63Sn-37Pb eutectic tin-lead solder, eyeyona nto ibalulekileyo kwi-electronic soldering material phantse iminyaka eyi-100.
Ngenxa yokunganyangeki kakuhle kwe-oxidation kwiqondo lobushushu begumbi, i-tin yindawo ephantsi yokunyibilika yentsimbi enokwakheka okuthambileyo, kunye ne-ductility elungileyo.Ilothe ayisiyiyo kuphela isinyithi esithambileyo esineempawu ezizinzileyo zemichiza, ukumelana ne-oxidation, kunye nokuxhathisa ukubola, kodwa inokubunjwa okulungileyo, kunye nokuphosa, kwaye kulula ukuyiqhuba kunye nokubumba.Ilothe kunye netoti zinokunyibilika kakuhle.Ukongeza imilinganiselo eyahlukeneyo yelothe kwitoti inokwenza i-solder ephezulu, ephakathi, kunye nesezantsi.Ngokukodwa, i-63Sn-37Pb eutectic solder ine-conductivity egqwesileyo yombane,, ukuzinza kweekhemikhali,, iipropathi zoomatshini kunye nokuqhubekeka, indawo encibilikayo ephantsi kunye namandla adibeneyo e-solder, yinto efanelekileyo yokuthengisa nge-elektroniki.Ngoko ke, i-tin inokudibaniswa nelothe, isilivere, i-bismuth, i-indium kunye nezinye izinto zetsimbi ukwenza i-solder ephezulu, ephakathi kunye nephantsi yokushisa kwizicelo ezahlukeneyo.
Iimpawu ezisisiseko zomzimba kunye neekhemikhali zetoti
I-Tin yintsimbi ekhazimlayo yesilivere-mhlophe ekwaziyo ukumelana ne-oxidation kwiqondo lobushushu begumbi kwaye igcina ukukhazimla kwayo xa ivezwe emoyeni: kunye noxinzelelo lwe-7.298 g/cm2 (15) kunye nendawo yokunyibilika eyi-232, yintsimbi ephantsi yokunyibilika. kunye nokuthungwa okuthambileyo kunye ne-ductility elungileyo.
I. Isigaba sokutshintsha isenzeko setoti
Inqanaba lokutshintsha kwe-tin yi-13.2.i-boron tin emhlophe kwiqondo lokushisa elingaphezulu kwenqanaba lokutshintsha kwesigaba;xa iqondo lokushisa liphantsi kunenqanaba lokutshintsha kwesigaba, liqala ukujika libe ngumgubo.Xa utshintsho lwesigaba lwenzeka, umthamo uya kwanda malunga ne-26%.Utshintsho lwenqanaba lobushushu obuphantsi lwe-tin lubangela ukuba i-solder ibe brittle kwaye amandla aphantse anyamalale.Izinga lokutshintsha kwesigaba likhawuleza kakhulu malunga ne-40, kwaye kumaqondo okushisa angaphantsi kwe-50, i-metallic tin iguqulwa ibe yipowder grey tin.Ke ngoko, itoti esulungekileyo ayinakusetyenziswa kwindibano ye-elektroniki.
II.Iimpawu zeekhemikhali zetoti
1. I-Tin ine-corrosion resistance resistance emoyeni, akulula ukulahlekelwa yi-luster, engachaphazeleki ngamanzi, i-oksijeni, i-carbon dioxide.
2. I-Tin inokuxhathisa ukubola kwe-asidi ephilayo kwaye inokumelana okuphezulu kwizinto ezingathathi hlangothi.
3. I-Tin yintsimbi ye-amphoteric kwaye inokusabela nge-acids eqinile kunye neziseko, kodwa ayikwazi ukumelana ne-chlorine, iodine, i-caustic soda kunye ne-alkali.
Ukonakala.Ngoko ke, kwiibhodi zendibano ezisetyenziselwa kwiindawo ezine-acidic, i-alkaline kunye netyuwa yokutshiza, i-triple anti-corrosion coating iyadingeka ukukhusela amalunga e-solder.
Kukho iingenelo kunye nokungonakali, la macala omabini engqekembe.Kwimveliso ye-PCBA, kubalulekile ukuqwalasela indlela yokukhetha i-solder ye-tin-lead echanekileyo okanye i-solder engena-lothe ngokweemveliso ezahlukeneyo kulawulo lomgangatho.
Ixesha lokuposa: Dec-21-2021