Iintsimbi ezixabisekileyo zibhekisa ikakhulu kwi-Au, Ag, PD, Pt kunye nezinye izinto, ezine-conductivity elungileyo, i-thermal conductivity, ukumelana nokubola kunye nobushushu obuphezulu bokunyibilika.Zisetyenziswa ngokubanzi kwizixhobo zombane ukwenza amacandelo esekethe avulekileyo navaliweyo.
(1) Iimpawu zokudibanisa njengezinto zokudibanisa, iintsimbi ezixabisekileyo zineempawu eziqhelekileyo zendawo yokutshisa encinci, efuna ukuba isinyithi esiqhekezayo sibe nefuthe elihle lokuchasana, amandla aphezulu, ukuxhathisa okuthile kwe-oxidation, kwaye inokumelana nokuhlaselwa kwe-arc, kodwa ayitshintshi iimpawu zoqhagamshelwano kunye neempawu zombane zamacandelo.Ekubeni indawo yokuqhafaza yoqhagamshelwano ilinganiselwe, ukugqithiswa kwe-solder akuvumelekanga, kwaye iiparitha zenkqubo yokuqhafaza kufuneka zilawulwe ngokungqongqo.
Uninzi lweendlela zokufudumeza zingasetyenziselwa ukubraya iintsimbi ezixabisekileyo kunye nonxibelelwano lwentsimbi exabisekileyo.Ukuvutha komlilo kudla ngokusetyenziswa kumacandelo amakhulu oqhagamshelwano;I-induction brazing ifanelekile kwimveliso yobuninzi.Ukunyanzeliswa kwe-resistance brazing kunokwenziwa ngomatshini oqhelekileyo we-welding welding, kodwa ixesha elincinci langoku kunye nexesha elide lokuqhawula kufuneka likhethwe.Ibhloko yekhabhoni ingasetyenziswa njenge electrode.Xa kuyimfuneko ukugcoba inani elikhulu lamacandelo oqhagamshelwano ngexesha elinye okanye ukuqhafaza abafowunelwa abaninzi kwicandelo elinye, ukuvutha kwesithando somlilo kungasetyenziswa.Xa iintsimbi ezihloniphekileyo zigxininiswe ngeendlela eziqhelekileyo kwi-atmosphere, umgangatho wamalungu uhlwempuzekile, ngelixa i-vacuum brazing inokufumana amalunga aphezulu, kwaye iipropati zezixhobo ngokwazo aziyi kuchaphazeleka.
(2) Igolide yokubrawuza kunye nealloyi yayo ikhethwa njengesinyithi sokubrawuza.I-Silver based based and copper based metal filler isetyenziswa ikakhulu kuqhagamshelwano, olungaqinisekisi kuphela ukuhanjiswa kwe-brazing joint, kodwa kulula ukumanzisa.Ukuba iimfuno ze-conductivity ezihlangeneyo zinokufezekiswa, isinyithi se-brazing filler equkethe i-Ni, i-PD, i-Pt kunye nezinye izinto zingasetyenziswa, kunye ne-brazing filler metal ne-brazing nickel, i-diamond alloy kunye ne-oxidation resistance resistance ingasetyenziswa.Ukuba i-Ag Cu Ti yokufaka isinyithi ikhethiwe, iqondo lobushushu lokubeka aliyi kuba ngaphezulu kwe-1000 ℃
I-oxide yesilivere eyenziwe kumphezulu wesilivere ayizinzile kwaye kulula ukuyibetha.I-solder yesilivere inokusebenzisa i-tin lead filler metal kunye ne-zinc chloride isisombululo samanzi okanye i-rosin njenge-flux.Xa i-brazing, i-metal filler metal isoloko isetyenziswa, kwaye i-borax, i-boric acid okanye imixube yazo isetyenziswa njenge-brazing flux.Xa i-vacuum brazing isilivere kunye nesilivere ye-alloy contacts, isilivere esekelwe kwi-brazing filler metals isetyenziswa ikakhulu, njenge-b-ag61culn, b-ag59cu5n, b-ag72cu, njl.
Ukudibanisa unxibelelwano lwe-palladium, i-gold based and nickel based solders ekulula ukwenza izisombululo eziqinileyo, okanye isilivere esekelwe, i-copper based or manganese based solders ingasetyenziswa.Isiseko sesilivere sisetyenziswa ngokubanzi kwiplatinam kunye noqhagamshelwano lweplatinam alloy.Isekwe ubhedu, igolide esekwe okanye i-palladium esekwe kwi-solder.Ukukhetha i-b-an70pt30 yokuqhafaza isinyithi ayikwazi nje ukutshintsha umbala weplatinum, kodwa iphinde iphucule ngokufanelekileyo ubushushu obuncitshisiweyo be-brazing joint kunye nokwandisa amandla kunye nobunzima bokudibanisa.Ukuba umfowunelwa weplatinam kufuneka uqhagamshelwe ngokuthe ngqo kwi-kovar alloy, i-b-ti49cu49be2 solder inokukhethwa.Kuqhagamshelwano lweplatinam olunobushushu obusebenzayo obungagqithiyo kuma-400 ℃ kwindawo engadlekiyo, i-oxygen engenasoda yobhedu ecocekileyo enexabiso eliphantsi kunye nokusebenza kakuhle kuya kukhethwa.
(3) Ngaphambi kokutshiza, i-weldment, ngakumbi indibano yoqhagamshelwano, iya kuhlolwa.Abafowunelwa abakhutshwe kwi-plate encinci okanye banqunywe kwi-strip abayi kuphazamiseka ngenxa yokubethelwa kunye nokusika.Umphezulu wokudibanisa umnxeba owenziwe ngokuphazamisa, ukucofa okulungileyo kunye nokunyanzeliswa kufuneka kube ngokuthe tye ukuze kuqinisekiswe ukuba unxibelelwano oluhle kunye nomgangatho osicaba wenkxaso.Umphezulu ogobileyo wenxalenye oza kuxutywa okanye umphezulu wayo nayiphi na i-radius kufuneka ihambelane ukuze kuqinisekiswe umphumo ofanelekileyo we-capillary ngexesha lokuqhaqha.
Ngaphambi kokudibanisa abafowunelwa abahlukeneyo, ifilimu ye-oxide ephezu kwe-weldment iya kususwa ngeendlela zeekhemikhali okanye zemishini, kwaye umphezulu we-weldment uya kucocwa ngononophelo ngepetroli okanye utywala ukususa ioli, igrisi, uthuli kunye nokungcola okuthintela ukumanzisa. kunye nokuhamba.
I-weldments encinci, i-adhesive iya kusetyenziselwa ukubeka kwangaphambili ukuqinisekisa ukuba ayiyi kutshintsha ngexesha lokusingatha inkqubo yokutshaja kwesithando somlilo kunye ne-filler metal charger, kunye ne-adhesive esetyenzisiweyo ayiyi kubangela ingozi kwi-brazing.Kwi-weldment enkulu okanye uqhagamshelwano olukhethekileyo, indibano kunye nokubeka indawo kufuneka ibe nge-fixture kunye nomphathi okanye i-groove ukwenza i-weldment ibe yindawo ezinzileyo.
Ngenxa ye-thermal conductivity efanelekileyo yezinto ezixabisekileyo zetsimbi, izinga lokushisa kufuneka libekwe ngokohlobo lwezinto eziphathekayo.Ngexesha lokupholisa, izinga kufuneka lilawulwe ngokufanelekileyo ukwenza i-brazing joint stress uniform;Indlela yokufudumala iya kwenza ukuba iindawo ezidibeneyo zifikelele kwiqondo lokushisa lokutshisa ngexesha elifanayo.Uqhagamshelwano oluncinci lwentsimbi enqabileyo, ukufudumeza ngokuthe ngqo kufuneka kugwenywe kwaye ezinye iindawo zingasetyenziselwa ukufudumeza ukuqhuba.Uxinzelelo oluthile luya kusetyenziswa kuqhagamshelwano ukwenza uqhagamshelwano lulungiswe xa i-solder inyibilika kwaye ihamba.Ukuze kugcinwe ukuqina kwenkxaso yoqhagamshelwano okanye inkxaso, i-annealing iya kugwenywa.Ukufudumeza kunokukhawulwa kwindawo yokukhanya, njengokulungelelanisa indawo ngexesha lokutshisa amadangatye, ukubethelwa kwe-induction okanye ukunyanzeliswa kwebrashi.Ukongezelela, ukwenzela ukuthintela i-solder ekunyibilikeni kweentsimbi ezixabisekileyo, amanyathelo afana nokulawula inani le-solder, ukuphepha ukufudumeza ngokugqithiseleyo, ukunciphisa ixesha lokuqhaqhazela kwiqondo lokushisa, kunye nokwenza ubushushu busasazwe ngokulinganayo.
Ixesha lokuposa: Jun-13-2022