Izinsimbi eziyigugu zibhekisela kakhulu ku-Au, Ag, PD, Pt nezinye izinto, ezinomoya omuhle wokuqhuba, umoya wokushisa, ukumelana nokugqwala kanye nokushisa okuphezulu kokuncibilika. Zisetshenziswa kabanzi emishinini kagesi ukukhiqiza izingxenye zesekethe ezivulekile nezivaliwe.
(1) Izici ze-Brazing njengezinto zokuxhumana, izinsimbi eziyigugu zinezici ezivamile zendawo encane ye-brazing, okudinga ukuthi insimbi ye-brazing seam ibe nokumelana okuhle komthelela, amandla aphezulu, ukumelana okuthile kwe-oxidation, futhi ikwazi ukumelana nokuhlaselwa yi-arc, kodwa ayishintshi izici zezinto zokuxhumana kanye nezakhiwo zikagesi zezingxenye. Njengoba indawo ye-brazing yokuxhumana ilinganiselwe, ukugcwala kwe-solder akuvunyelwe, futhi amapharamitha enqubo ye-brazing kufanele alawulwe ngokuqinile.
Izindlela eziningi zokushisa zingasetshenziswa ukubhula izinsimbi eziyigugu kanye nokuxhumana kwazo kwensimbi eyigugu. Ukubhula ilangabi kuvame ukusetshenziselwa izingxenye ezinkulu zokuxhumana; Ukubhula kokungenisa kufanelekela ukukhiqizwa ngobuningi. Ukubhula kokumelana kungenziwa ngomshini wokushisela ojwayelekile wokumelana, kodwa kufanele kukhethwe isikhathi esincane samanje nesikhathi eside sokubhula. Ibhulokhi lekhabhoni lingasetshenziswa njenge-electrode. Uma kudingeka ukubhula inani elikhulu lezingxenye zokuxhumana ngesikhathi esisodwa noma ukubhula oxhumana nabo abaningi engxenyeni eyodwa, ukubhula kwesithando somlilo kungasetshenziswa. Lapho izinsimbi ezinhle zibhula ngezindlela ezivamile emoyeni, ikhwalithi yamalunga ayimbi, kuyilapho ukubhula nge-vacuum kungathola amalunga ekhwalithi ephezulu, futhi izakhiwo zezinto ngokwazo ngeke zithinteke.
(2) Igolide elicwebezelayo kanye nengxube yalo kukhethwa njengezinsimbi zokugcwalisa insimbi. Izinsimbi zokugcwalisa ezisekelwe esiliveni kanye nezethusi zisetshenziswa kakhulu ekuthinteni, okuqinisekisa ukuthi i-conductivity ye-brazing joint iyaqhutshwa, kodwa futhi kulula ukuyimanzisa. Uma izidingo zokuqhuba insimbi zingahlangatshezwana nazo, insimbi yokugcwalisa insimbi equkethe i-Ni, i-PD, i-Pt nezinye izinto zingasetshenziswa, kanti insimbi yokugcwalisa insimbi ene-brazing nickel, i-alloy yedayimane kanye nokumelana okuhle kwe-oxidation nayo ingasetshenziswa. Uma kukhethwa insimbi yokugcwalisa insimbi ye-Ag Cu Ti, izinga lokushisa le-brazing akufanele libe ngaphezu kuka-1000 ℃
I-oxide yesiliva eyakhiwe phezu kwesiliva ayizinzile futhi kulula ukuyibopha. Ukugoqa kwesiliva kungasebenzisa insimbi ye-tin lead filler enesisombululo samanzi se-zinc chloride noma i-rosin njenge-flux. Lapho kubopha, kuvame ukusetshenziswa insimbi yesiliva filler, kanti i-borax, i-boric acid noma izingxube zazo zisetshenziswa njenge-flux ye-brazing. Lapho kubopha nge-vacuum brazing silver kanye ne-silver alloy contacts, kusetshenziswa kakhulu izinsimbi zesiliva ezisekelwe ku-brazing filler, njenge-b-ag61culn, b-ag59cu5n, b-ag72cu, njll.
Koxhumana nabo be-palladium abasebenzisa i-brazing, kungasetshenziswa ama-solder asekelwe egolideni nase-nickel okulula ukuwakha izixazululo eziqinile, noma ama-solder asekelwe esilivani, asekelwe ethusini noma e-manganese. Isisekelo sesiliva sisetshenziswa kabanzi koxhumana nabo be-platinum abasebenzisa i-brazing kanye ne-platinum alloy. I-solder esekelwe ethusini, egolideni noma e-palladium. Ukukhetha insimbi yokugcwalisa i-brazing ye-b-an70pt30 akugcini nje ngokushintsha umbala we-platinum, kodwa futhi kuthuthukisa ngempumelelo izinga lokushisa lokuncibilikisa kwe-brazing joint futhi kwandise amandla nobunzima be-brazing joint. Uma ukuxhumana kwe-platinum kuzofakwa ngqo ku-kovar alloy, i-b-ti49cu49be2 solder ingakhethwa. Koxhumana nabo be-platinum abanokushisa okusebenzayo okungadluli ku-400 ℃ endaweni engaboliyo, i-solder yethusi emsulwa engenawo umoya-mpilo enezindleko eziphansi kanye nokusebenza kahle kwenqubo kufanele kukhethwe.
(3) Ngaphambi kokushisela, ukushisela, ikakhulukazi i-contact assembly, kufanele kuhlolwe. Oxhumana nabo abakhishwe epuletini elincane noma abasikiwe kusuka ku-strip akufanele bakhubazeke ngenxa yokubhoboza nokusika. Ubuso bokushisela boxhumana nabo obakhiwe ngokuphambanisa, ukucindezela okuncane kanye nokwakha kumele buqonde ukuqinisekisa ukuthintana okuhle nobuso obuyisicaba bokusekela. Ubuso obugobile bengxenye ezoshisela noma ubuso banoma iyiphi i-radius kumele buhambisane ukuqinisekisa umphumela ofanele we-capillary ngesikhathi sokushisela.
Ngaphambi kokufaka i-bracing yezinto ezahlukahlukene ezithintanayo, ifilimu ye-oxide ebusweni be-weldment kufanele isuswe ngezindlela zamakhemikhali noma zemishini, futhi ubuso be-weldment kufanele buhlanzwe ngokucophelela ngophethiloli noma utshwala ukuze kususwe uwoyela, amafutha, uthuli kanye nokungcola okuvimbela ukumanzisa nokugeleza.
Kuma-weldings amancane, i-glue kufanele isetshenziselwe ukubeka kusengaphambili ukuqinisekisa ukuthi ngeke ishintshe ngesikhathi senqubo yokuphatha yokushaja isithando somlilo kanye nokushaja insimbi yokugcwalisa, futhi i-glue esetshenzisiwe ngeke ibangele umonakalo ku-brazing. Kuma-weldings amakhulu noma ukuthintana okukhethekile, ukuhlanganiswa kanye nokubekwa kumele kube ngokusebenzisa i-fixture ne-boss noma i-groove ukuze i-weldment ibe sesimweni esizinzile.
Ngenxa yokushisa okuhle kwezinto zensimbi eziyigugu, izinga lokushisa kufanele linqunywe ngokohlobo lwezinto. Ngesikhathi sokupholisa, izinga lokushisa kufanele lilawulwe kahle ukuze kwenziwe ukucindezeleka kwejoyinti le-brazing kufane; Indlela yokushisa kufanele ivumele izingxenye ezihlanganisiwe ukuthi zifinyelele izinga lokushisa le-brazing ngesikhathi esifanayo. Koxhumana nabo bensimbi abancane abayigugu, kufanele kugwenywe ukushisa okuqondile futhi ezinye izingxenye zingasetshenziswa ekufudumaleni kokuqhuba. Ingcindezi ethile kufanele isetshenziswe koxhumana nabo ukuze kwenziwe ukuxhumana kuqine lapho i-solder incibilika futhi igeleza. Ukuze kugcinwe ukuqina kokusekelwa noma ukwesekwa kokuxhumana, ukunamathisela kufanele kugwenywe. Ukushisa kungakhawulelwa endaweni engaphezulu ye-brazing, njengokulungisa indawo ngesikhathi se-flame brazing, i-induction brazing noma i-resistance brazing. Ngaphezu kwalokho, ukuze kuvinjelwe i-solder ekuncibilikiseni izinsimbi eziyigugu, izinyathelo ezinjengokulawula inani le-solder, ukugwema ukushisa ngokweqile, ukunciphisa isikhathi se-brazing ekushiseni kwe-brazing, nokwenza ukushisa kusatshalaliswe ngokulinganayo.
Isikhathi sokuthunyelwe: Juni-13-2022