Iintsimbi ezixabisekileyo zibhekisa ikakhulu kwi-Au, Ag, PD, Pt kunye nezinye izinto, ezinomoya olungileyo wokuqhuba, umbane oshushu, ukumelana nokugqwala kunye nobushushu obuphezulu bokunyibilika. Zisetyenziswa kakhulu kwizixhobo zombane ukwenza izixhobo zesekethe ezivulekileyo nezivaliweyo.
(1) Iimpawu zebrazing njengezinto zoqhagamshelwano, iintsimbi ezixabisekileyo zineempawu ezifanayo zendawo encinci yebrazing, nto leyo efuna ukuba isinyithi se-brazing seam sibe nokumelana okuhle kwempembelelo, amandla aphezulu, ukumelana ne-oxidation ethile, kwaye singakwazi ukumelana nohlaselo lwe-arc, kodwa asitshintshi iimpawu zezinto zoqhagamshelwano kunye neempawu zombane zezixhobo. Ekubeni indawo yebrazing yoqhagamshelwano inqongophele, ukugcwala kwe-solder akuvumelekanga, kwaye iiparameter zenkqubo yebrazing kufuneka zilawulwe ngokungqongqo.
Uninzi lweendlela zokufudumeza zingasetyenziselwa ukubethela iintsimbi ezixabisekileyo kunye noqhagamshelwano lwazo lwesinyithi oluxabisekileyo. Ukubethela ilangatye kudla ngokusetyenziswa kwiindawo ezinkulu zonxibelelwano; Ukubethela ngokungenisa kufanelekile ukuvelisa ngobuninzi. Ukubethela ngokumelana kungenziwa ngomatshini wokuwelda oqhelekileyo wokuxhathisa, kodwa kufuneka kukhethwe ixesha elincinci lokubethela kunye nexesha elide lokubethela. Ibhloko yekhabhoni ingasetyenziswa njenge-electrode. Xa kuyimfuneko ukubethela inani elikhulu lezinto zonxibelelwano ngaxeshanye okanye ukubethela oonxibelelwano abaninzi kwicandelo elinye, ukubethela ngomlilo kungasetyenziswa. Xa iintsimbi ezintle zibethelwa ngeendlela eziqhelekileyo emoyeni, umgangatho wamalungu awulunganga, ngelixa ukubethela nge-vacuum kunokufumana amalungu asemgangathweni ophezulu, kwaye iimpawu zezinto ngokwazo aziyi kuchaphazeleka.
(2) Igolide yeBrazing kunye ne-alloy yayo zikhethwa njengeentsimbi zebrazing filler. Iintsimbi zefiller ezisekelwe kwisilivere kunye ne-copper zisetyenziselwa ikakhulu ukunxibelelana, ezingagcini nje ngokuqinisekisa ukuhanjiswa kwe-brazing joint, kodwa kulula nokumanzisa. Ukuba iimfuno ze-joint conductivity zinokufezekiswa, intsimbi yebrazing filler equlethe i-Ni, i-PD, i-Pt kunye nezinye izinto zingasetyenziswa, kwaye intsimbi yebrazing filler ene-brazing nickel, i-diamond alloy kunye nokumelana okuhle kwe-oxidation nayo ingasetyenziswa. Ukuba i-Ag Cu Ti brazing filler metal ikhethiwe, ubushushu bebrazing abuyi kuba ngaphezulu kwe-1000 ℃
I-oxide yesilivere eyenziwe phezu komphezulu wesilivere ayizinzanga kwaye kulula ukuyiqhobosha. Ukuxutywa kwesilivere kunokusebenzisa isinyithi se-tin lead filler esinesisombululo samanzi se-zinc chloride okanye i-rosin njenge-flux. Xa kuqhoboshwa, kusetyenziswa isinyithi se-silver filler, kwaye i-borax, i-boric acid okanye imixube yazo isetyenziswa njenge-brazing flux. Xa kuqhoboshwa nge-vacuum brazing silver kunye ne-silver alloy contacts, kusetyenziswa ikakhulu iintsimbi ze-silver based brazing filler, ezifana ne-b-ag61culn, b-ag59cu5n, b-ag72cu, njl.
Kwizihlanganisi ze-palladium ezirhabaxa, kungasetyenziswa izihlanganisi zegolide nezirhabaxa ezisekelwe kwi-nickel ezilula ukwenza izisombululo eziqinileyo, okanye izihlanganisi zesilivere, ezisekelwe kwi-copper okanye ezisekelwe kwi-manganese. Isiseko sesilivere sisetyenziswa kakhulu kwiihlanganisi ze-platinum ezirhabaxa kunye ne-platinum alloy. I-solder esekelwe kwi-copper, esekwe kwi-gold okanye esekwe kwi-palladium. Ukukhetha i-b-an70pt30 brazing filler metal akunakutshintsha nje kuphela umbala we-platinum, kodwa kukwaphucula ngempumelelo ubushushu bokunyibilika kwe-brazing joint kunye nokunyusa amandla kunye nobunzima be-brazing joint. Ukuba uqhagamshelo lwe-platinum luza kurhabaxa ngqo kwi-kovar alloy, i-b-ti49cu49be2 solder ingakhethwa. Kwizihlanganisi zeplatinum ezinobushushu bokusebenza obungadluli kwi-400 ℃ kwindawo engangcolisiyo, i-solder yobhedu ecocekileyo engena-oxygen enexabiso eliphantsi kunye nokusebenza kakuhle kwenkqubo kuya kukhethwa.
(3) Ngaphambi kokuqhobosha, ukuqhobosha, ingakumbi indibano yoqhagamshelwano, kufuneka kujongwe. Iziqhagamshelo ezikhutshiweyo kwipleyiti ebhityileyo okanye ezisikiweyo kwistrip aziyi konakala ngenxa yokuqhobosha nokusika. Umphezulu wokuqhobosha woqhagamshelwano owenziwe ngokucinezela nokucinezela okuncinci kufuneka uthe tye ukuqinisekisa ukunxibelelana okuhle nomphezulu othe tyaba wenkxaso. Umphezulu ogobileyo wenxalenye eza kuqhoboshwa okanye umphezulu wayo nayiphi na iradiyo kufuneka uhambelane ukuqinisekisa ukusebenza kakuhle kwe-capillary ngexesha lokuqhobosha.
Ngaphambi kokuba kufakwe ibrashi kwiindawo ezahlukeneyo zokunxibelelana, ifilimu ye-oxide kumphezulu we-weldment mayisuswe ngeendlela zeekhemikhali okanye ze-mechanical, kwaye umphezulu we-weldment kufuneka ucocwe ngononophelo ngepetroli okanye ngotywala ukuze kususwe ioyile, igrisi, uthuli kunye nokungcola okuthintela ukumanzisa nokuhamba kwamanzi.
Kwizinto zokugquma ezincinci, i-adhesive kufuneka isetyenziswe kwindawo yokuqala ukuqinisekisa ukuba ayitshintshi ngexesha lenkqubo yokuphatha i-oven charging kunye ne-filler metal charging, kwaye i-adhesive esetyenzisiweyo ayizukubangela umonakalo kwi-brazing. Kwi-weldment enkulu okanye unxibelelwano olukhethekileyo, i-assembly kunye ne-positioning kufuneka idlule kwi-fixture kunye ne-boss okanye i-groove ukuze i-weldment ihlale izinzile.
Ngenxa yokuqhuba kakuhle kobushushu bezinto zesinyithi ezixabisekileyo, izinga lokufudumeza kufuneka limiselwe ngokohlobo lwezinto. Ngexesha lokupholisa, izinga kufuneka lilawulwe ngokufanelekileyo ukuze uxinzelelo lwejoyinti yebrazing lufane; Indlela yokufudumeza kufuneka ivumele iindawo ezidityanisiweyo ukuba zifikelele kubushushu bebrazing ngaxeshanye. Kwiifowuni ezincinci zesinyithi ezixabisekileyo, ukufudumeza ngqo kufuneka kuthintelwe kwaye ezinye iindawo zingasetyenziselwa ukufudumeza ukuqhubela phambili. Uxinzelelo oluthile kufuneka lusetyenziswe kwifowuni ukuze kwenziwe unxibelelwano luhlale luqinile xa i-solder inyibilika kwaye iphuma. Ukuze kugcinwe ukuqina kwenkxaso yoqhagamshelwano okanye inkxaso, kufuneka kuthintelwe ukuqhoboshelwa. Ukufudumeza kunokukhawulelwa kwindawo yomphezulu webrazing, njengokulungisa indawo ngexesha le-flame brazing, i-induction brazing okanye i-resistance brazing. Ukongeza, ukuze kuthintelwe i-solder ekunyibilikiseni iintsimbi ezixabisekileyo, amanyathelo anjengokulawula ubungakanani be-solder, ukuphepha ukufudumeza okugqithisileyo, ukunciphisa ixesha le-brazing kubushushu bebrazing, kunye nokwenza ubushushu busasazwe ngokulinganayo kunokuthathwa.
Ixesha lokuthumela: Juni-13-2022