1. Thepa ea ho besa
(1) Brazing filler tšepe cast iron brazing haholo-holo e sebelisa koporo zinc brazing filler tšepe le silevera copper brazing filler tšepe. Mefuta ea koporo zinc brazing filler metal e sebelisoang haholo ke b-cu62znnimusir, b-cu60zusnr le b-cu58znfer. Matla a ho thaepa a brazing iron cast connection hangata a fihla ho 120 ~ 150MPa. Motheong oa koporo zinc brazing filler metal, Mn, Ni, Sn, AI le likarolo tse ling lia eketsoa ho etsa hore brazing iron e be le matla a tšoanang le tšepe ea motheo.
Mocheso o qhibilihang oa tšepe ea silevera e nang le koporo e thata o tlase. Sebopeho se kotsi se ka qojoa ha ho sebelisoa tšepe e thata. Sehokelo sa tšepe se na le ts'ebetso e ntle, haholo-holo tšepe e nang le Ni, joalo ka b-ag50cuzncdni le b-ag40cuznsnni, tse eketsang matla a ho tlama pakeng tsa tšepe e nang le koporo e thata le tšepe e thata. E loketse haholo ho sebelisoa tšepe e thata e nang le li-nodular, e ka etsang hore sehokelo se be le matla a tšoanang le tšepe ea motheo.
(2) Ha koporo le zinki li sebelisoa bakeng sa tšepe e entsoeng ka tšepe e besitsoeng, fb301 le fb302 li sebelisoa haholo-holo, ke hore, borax kapa motsoako oa borax le boric acid. Ho phaella moo, phallo e entsoeng ka h3bo340%, li2co316%, na2co324%, naf7.4% le nac112.6% e betere.
Ha ho besoa tšepe e entsoeng ka tšepe ea silevera e tlatsang koporo, ho ka khethoa li-flux tse kang fb101 le fb102, ke hore, motsoako oa borax, boric acid, potassium fluoride le potassium fluoroborate.
2. Theknoloji ea ho besa
Pele ho besoa tšepe e entsoeng ka tšepe, graphite, oxide, lehlabathe, letheba la oli le lintho tse ling tse holim'a bokaholimo ba ho betsa li lokela ho tlosoa ka hloko. Ho hloekisa ka lintho tse phelang ho ka sebelisoa ho tlosa matheba a oli, ha mekhoa ea mechine e kang ho phatloha ha lehlabathe kapa ho phatloha ka lithunya, kapa mekhoa ea electrochemical e ka sebelisoa ho tlosa graphite le li-oxide. Ho phaella moo, graphite e ka tlosoa ka ho e chesa ka lelakabe le etsang oxidizing.
Tšepe e entsoeng ka tšepe e ka futhumatsoa ka lelakabe, sebōpi kapa induction. Kaha SiO2 e bonolo ho e etsa holim'a tšepe e entsoeng ka tšepe, phello ea tšepe e sireletsang moeeng ha e ntle. Ka kakaretso, flux ea tšepe e sebelisoa bakeng sa brazing. Ha u brazing li-workpiece tse kholo ka tšepe ea koporo ea zinc brazing filler, lera la flux ea tšepe le tla fafatsoa holim'a bokaholimo bo hloekisitsoeng pele, ebe li-workpiece li tla kenngoa ka ontong bakeng sa ho futhumatsa kapa ho futhumatsoa ka toche ea ho tjheseletsa. Ha mosebetsi o futhumatsoa ho fihlela ho 800 ℃, eketsa flux e eketsehileng, e futhumatse mochesong oa brazing, ebe u hohla thepa ea nale moeling oa lenonyello ho qhibilihisa solder le ho tlatsa sekheo. E le ho ntlafatsa matla a lenonyello le entsoeng ka tšepe e entsoeng ka tšepe e entsoeng ka tšepe e tla etsoa ka 700 ~ 750 ℃ metsotso e 20 kamora ho brazing, ebe ho pholisoa butle.
Kamora ho besa, phallo e feteletseng le masalla a ka tlosoa ka ho hlatsuoa ka metsi a futhumetseng. Haeba ho le thata ho e tlosa, e ka hloekisoa ka tharollo ea metsi ea 10% ea sulfuric acid kapa tharollo ea metsi ea 5% ~ 10% ea phosphoric acid, ebe e hloekisoa ka metsi a hloekileng.
Nako ea poso: Phuptjane-13-2022