1. Brazing abu
(1)Brazing na carbon karfe da ƙananan gami da ƙarfe ya haɗa da brazing mai laushi da ƙaƙƙarfan brazing.Solder da aka yi amfani da shi sosai a cikin siyar da laushi shine dalar gubar.Riƙewar wannan solder zuwa ƙarfe yana ƙaruwa tare da haɓaka abun ciki na gwangwani, don haka mai siyar da abun ciki mai yawa yakamata a yi amfani da shi don rufe haɗin gwiwa.Fesn2 intermetallic fili Layer na iya zama a wurin mu'amala tsakanin kwano da karfe a cikin tin gubar solder.Don guje wa samuwar fili a cikin wannan Layer, zafin brazing da lokacin riƙewa yakamata a sarrafa shi da kyau.Ƙarfin ƙarfi na haɗin gwiwar ƙarfe na carbon da aka yi tare da masu siyar da gubar kwano da yawa ana nuna su a cikin Tebura 1. Daga cikin su, ƙarfin haɗin gwiwa da aka yi brazed tare da 50% w (SN) shine mafi girma, kuma ƙarfin haɗin gwiwa wanda aka saƙa tare da mai siyar kyauta na antimony ya fi girma fiye da cewa tare da antimony.
Tebura 1 Ƙarfin juzu'i na haɗin gwiwar ƙarfe na carbon wanda aka yi da gwangwani solder gubar
Lokacin brazing carbon karfe da ƙananan gami da ƙarfe, jan ƙarfe mai tsabta, jan ƙarfe zinc da azurfa jan ƙarfe na zinc brazing filler ana amfani da su musamman.Tagulla mai tsabta yana da babban wurin narkewa kuma yana da sauƙi don oxidize karfen tushe yayin brazing.Ana amfani da shi musamman don gyaran ƙarfe mai kariya da iskar gas.Duk da haka, ya kamata a lura da cewa rata tsakanin haɗin gwiwa ya kamata ya zama ƙasa da 0.05mm don kauce wa matsalar cewa ba za a iya cike gibin haɗin gwiwa ba saboda kyakkyawan ruwa na jan karfe.The carbon karfe da low gami karfe gidajen abinci brazed tare da tsantsa jan karfe da high ƙarfi.Gabaɗaya, ƙarfin juzu'i shine 150 ~ 215mpa, yayin da aka rarraba ƙarfi tsakanin 170 ~ 340mpa.
Idan aka kwatanta da tagulla mai tsafta, wurin narkewar silar jan ƙarfe na jan ƙarfe yana raguwa saboda ƙari na Zn.Don hana ƙawancewar Zn yayin brazing, a gefe guda, ana iya ƙara ƙaramin adadin Si a cikin siyar da zinc ta jan ƙarfe;A gefe guda, dole ne a yi amfani da hanyoyin ɗumama cikin sauri, kamar ƙyalli na harshen wuta, brazing induction da tsoma brazing.Haɗin gwiwar karfen carbon da ƙaramin ƙarfe mai ƙarancin ƙarfe wanda aka yi da ƙarfe na zinc filler ƙarfe suna da ƙarfi mai kyau da filastik.Misali, ƙarfin ƙwanƙwasa da ƙarfin juzu'i na gidajen haɗin gwiwar ƙarfe na carbon da aka yi tare da solder b-cu62zn sun kai 420MPa da 290mpa.Wurin narkewar siyar da tashar tagulla ta azurfa ta yi ƙasa da na jan ƙarfe na zinc solder, wanda ya dace da waldar allura.Wannan ƙarfe mai cikawa ya dace da brazing na harshen wuta, induction brazing da tanderu brazing na carbon karfe da low alloy karfe, amma abun ciki na Zn ya kamata a rage kamar yadda zai yiwu a lokacin da tanderu brazing, da kuma dumama kudi ya kamata a ƙara.Brazing carbon karfe da low gami karfe tare da azurfa jan karfe filler karfe iya samun gidajen abinci tare da kyau ƙarfi da kuma roba.An jera takamaiman bayanai a cikin Table 2.
Tebur 2 ƙarfi na ƙananan haɗin gwiwar ƙarfe na carbon brazed tare da siyar da zinc ta ƙarfe na azurfa
(2) Flux: juyi ko garkuwar gas za a yi amfani da shi don brazing carbon karfe da ƙananan gami karfe.Yawancin lokaci ana ƙayyade juzu'in ta hanyar zaɓin ƙarfe mai filler da hanyar brazing.Lokacin da aka yi amfani da siyar da gubar dalma, za a iya amfani da gaurayen ruwa na zinc chloride da ammonium chloride a matsayin juzu'i ko wani juyi na musamman.Ragowar wannan juzu'i gabaɗaya yana da lalacewa sosai, kuma yakamata a tsaftace haɗin gwiwa sosai bayan an yi tagulla.
Lokacin brazing tare da ƙarfe na zinc filler na jan karfe, fb301 ko fb302 flux za a zaɓi, wato, borax ko cakuda borax da boric acid;A cikin harshen wuta, ana iya amfani da cakuda methyl borate da formic acid azaman brazing flux, wanda B2O3 tururi ke taka rawar cire fim.
Lokacin da aka yi amfani da ƙarfe na ƙarfe na zinc brazing na azurfa, fb102, fb103 da fb104 brazing fluxes za a iya zaɓar, wato, cakuda borax, boric acid da wasu fluorides.Ragowar wannan juzu'i yana lalatawa zuwa wani wuri kuma yakamata a cire shi bayan an yi tagulla.
2. Fasahar Brazing
Za a tsaftace farfajiyar da za a yi walda ta hanyar inji ko hanyoyin sinadarai don tabbatar da cewa an cire fim din oxide da kwayoyin halitta gaba daya.Wurin da aka tsabtace ba zai zama mai muguwar gaske ba kuma kada ya tsaya ga guntun ƙarfe ko wasu datti.
Carbon karfe da ƙananan gami karfe za a iya brazed ta daban-daban na kowa brazing hanyoyin.A lokacin brazing na harshen wuta, ya kamata a yi amfani da tsaka tsaki ko ɗan rage harshen wuta.Yayin aiki, dumama karfen filler kai tsaye da jujjuyawar wuta ya kamata a kauce masa gwargwadon yiwuwa.Hanyoyin dumama cikin sauri kamar induction brazing da tsoma brazing sun dace sosai don brazing na ƙarewa da ƙarfe mai zafi.A lokaci guda, quenching ko brazing a yanayin zafi ƙasa da zafin jiki ya kamata a zaɓi don hana laushin ƙarfe na tushe.Lokacin brazing low gami high ƙarfi karfe a cikin m yanayi, ba kawai high tsarki na iskar da ake bukata, amma kuma iskar gas dole ne a yi amfani da don tabbatar da wetting da yada filler karfe a saman tushe karfe.
Za a iya cire ragowar juzu'in ta hanyar sinadarai ko na inji.Za'a iya gogewa ko tsaftace ragowar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta za a iya shafewa ko tsaftace shi tare da man fetur, barasa, acetone da sauran kaushi na kwayoyin halitta;Ragowar ruwa mai ƙarfi kamar zinc chloride da ammonium chloride za a lalata su a cikin maganin ruwa na NaOH da farko, sannan a tsaftace shi da ruwan zafi da sanyi;Boric acid da boric acid flux ragowar suna da wahalar cirewa, kuma za'a iya magance su ta hanyoyin inji ko kuma dogon nutsewa cikin ruwa mai tasowa.
Lokacin aikawa: Juni-13-2022