1. Brazing abu
(1) Brazing filler karfe simintin ƙarfe brazing galibi yana ɗaukar ƙarfe zinc brazing filler karfe da ƙarfe na ƙarfe na ƙarfe na ƙarfe na ƙarfe.Samfuran samfuran ƙarfe na zinc brazing na jan ƙarfe da aka saba amfani da su sune b-cu62znnimusir, b-cu60zusnr da b-cu58znfer.Ƙarfin jujjuyawar haɗin gwiwar simintin ƙarfe gabaɗaya ya kai 120 ~ 150MPa.Dangane da ƙarfe na ƙarfe na zinc brazing na jan ƙarfe, Mn, Ni, Sn, AI da sauran abubuwa ana ƙara su don sanya haɗin gwiwa mai ƙarfi ya sami ƙarfi iri ɗaya tare da ƙarfen tushe.
Zazzabi na narkewar ƙarfe na ƙarfe na ƙarfe na ƙarfe na ƙarfe na ƙarfe yana da ƙasa kaɗan.Za a iya guje wa tsari mai cutarwa lokacin da ake yin simintin ƙarfe.Haɗin gwiwar brazing yana da kyakkyawan aiki, musamman ƙarfe mai cike da brazing mai ƙunshe da Ni, kamar b-ag50cuzncdni da b-ag40cuznsnni, waɗanda ke haɓaka ƙarfin ɗaure tsakanin ƙarfen filler ɗin brazing da simintin ƙarfe.Ya dace musamman don brazing na nodular simintin ƙarfe, wanda zai iya sa haɗin gwiwa ya sami ƙarfi iri ɗaya tare da ƙarfe mai tushe.
(2) Idan aka yi amfani da tagulla da zinc wajen yin simintin ƙarfe, fb301 da fb302 galibi ana amfani da su, wato borax ko cakuɗen borax da boric acid.Bugu da ƙari, juzu'in da ya ƙunshi h3bo340%, li2co316%, na2co324%, naf7.4% da nac112.6% ya fi kyau.
Lokacin jefa baƙin ƙarfe da ƙarfe na ƙarfe na ƙarfe na ƙarfe na ƙarfe, za a iya zaɓar nau'i-nau'i irin su fb101 da fb102, watau cakuda borax, boric acid, potassium fluoride da potassium fluoroborate.
2. Fasahar Brazing
Kafin a cire simintin ƙarfe na simintin ƙarfe, graphite, oxide, yashi, tabon mai da sauran sundries akan farfajiyar simintin a hankali.Ana iya amfani da gogewar kaushi mai ƙarfi don cire tabon mai, yayin da ana iya amfani da hanyoyin injiniya kamar fashewar yashi ko fashewar harbi, ko hanyoyin electrochemical don cire graphite da oxides.Bugu da ƙari, ana iya cire graphite ta hanyar ƙone shi da harshen wuta.
Ana iya dumama ƙarfen simintin ƙarfe ta wuta, tanderu ko ƙara.Tun da SiO2 yana da sauƙin samuwa akan saman simintin ƙarfe, tasirin brazing a cikin yanayin kariya ba shi da kyau.Gabaɗaya, ana amfani da juzu'in brazing don brazing.Lokacin brazing manyan workpieces tare da jan karfe tutiya brazing filler karfe, da Layer na brazing flux za a fara fesa a kan tsabtace surface da farko, sa'an nan da workpieces za a sa a cikin tanderu domin dumama ko mai tsanani da walda tocila.Lokacin da kayan aikin ya yi zafi zuwa kusan 800 ℃, ƙara ƙarin juzu'i, zafi shi zuwa zafin zafin jiki, sa'an nan kuma goge kayan allura a gefen haɗin gwiwa don narke mai siyarwar kuma cike gibin.Domin inganta ƙarfin haɗin gwiwa na brazed, za a gudanar da maganin annealing a 700 ~ 750 ℃ na minti 20 bayan brazing, sa'an nan kuma sannu a hankali sanyaya.
Bayan brazing, za a iya cire wuce haddi da saura ta hanyar wankewa da ruwan dumi.Idan yana da wuya a cire, za'a iya tsaftace shi da 10% sulfuric acid aqueous solution ko 5% ~ 10% phosphoric acid aqueous solution, sannan a tsaftace shi da ruwa mai tsabta.
Lokacin aikawa: Juni-13-2022