1. Lisebelisoa tsa ho chesoa
(1) Brazing filler metal cast cast iron brazing haholo-holo e sebelisa koporo zinki brazing filler tšepe le silevera koporo brazing filler tšepe.Mefuta ea tšepe e sebelisoang hangata ea koporo ea zinki ke b-cu62znnimusir, b-cu60zusnr le b-cu58znfer.Matla a tsitsitseng a lenonyeletso la tšepe e entsoeng ka brazed hangata a fihla ho 120 ~ 150MPa.Motheong oa tšepe ea tšepe ea koporo ea zinki, Mn, Ni, Sn, AI le likarolo tse ling li eketsoa ho etsa hore lenonyeletso la brazed le be le matla a tšoanang le tšepe ea motheo.
Mocheso o qhibilihang oa tšepe ea tšepe ea koporo ea koporo o tlase.Sebopeho se kotsi se ka qojoa ha ho betla tšepe e entsoeng ka tšepe.Lenonyeletso la brazing le na le ts'ebetso e ntle, haholo-holo tšepe ea brazing e nang le Ni, joalo ka b-ag50cuzncdni le b-ag40cuznsnni, e matlafatsang matla a tlamang pakeng tsa tšepe ea brazing le tšepe e entsoeng ka tšepe.E loketse ka ho khetheha bakeng sa brazing ea tšepe ea nodular cast, e ka etsang hore motsoako o be le matla a tšoanang le tšepe ea motheo.
(2) Ha koporo le zinki li sebelisoa bakeng sa brazing cast iron, fb301 le fb302 li sebelisoa haholo-holo, ke hore, borax kapa motsoako oa borax le boric acid.Ho phaella moo, flux e entsoeng ka h3bo340%, li2co316%, na2co324%, naf7.4% le nac112.6% e molemo.
Ha ho etsoa tšepe e entsoeng ka tšepe e nang le tšepe ea koporo ea silevera, ho ka khethoa li-fluxes tse kang fb101 le fb102, ke hore, motsoako oa borax, boric acid, potassium fluoride le potassium fluoroborate.
2. Theknoloji ea brazing
Pele ho chesoa tšepe e entsoeng ka tšepe, graphite, oxide, lehlabathe, letheba la oli le li-sundries tse ling tse holim'a ho lahla li tla tlosoa ka hloko.Organic solvent scrubbing e ka sebelisoa ho tlosa matheba a oli, ha mekhoa ea mechine e kang ho qhomisa lehlabathe kapa ho thunya, kapa mekhoa ea electrochemical e ka sebelisoa ho tlosa graphite le oxides.Ho phaella moo, graphite e ka tlosoa ka ho e chesa ka lelakabe la oxidizing.
Brazing cast iron e ka futhumatsoa ka lelakabe, sebōpi kapa induction.Kaha SiO2 e bonolo ho theha holim'a tšepe e entsoeng ka tšepe, phello ea brazing sebakeng se sireletsang ha e ntle.Ka kakaretso, brazing flux e sebelisoa bakeng sa brazing.Ha o tiisa lisebelisoa tse kholo tsa tšepe ka tšepe ea koporo ea zinc brazing, ho tla fafatsoa lesela la brazing flux holim'a metsi a hloekisitsoeng pele, ebe lisebelisoa li tla kenngoa ka seboping bakeng sa ho futhumatsa kapa ho futhumatsa ka toche ea welding.Ha workpiece e futhumetse hoo e ka bang 800 ℃, eketsa phallo ea tlatsetso, e futhumale mochesong oa mocheso, ebe o hohola lisebelisoa tsa nale pheletsong ea lenonyeletso ho qhibilihisa solder le ho tlatsa lekhalo.Bakeng sa ho ntlafatsa matla a lenonyeletso la brazed, kalafo ea annealing e tla etsoa ka 700 ~ 750 ℃ bakeng sa 20min ka mor'a brazing, ebe ho pholile butle ho tla etsoa.
Ka mor'a ho khabisa, ho phalla ho feteletseng le masala ho ka tlosoa ka ho hlatsoa ka metsi a futhumetseng.Haeba ho le thata ho e tlosa, e ka hloekisoa ka 10% ea sulfuric acid aqueous solution kapa 5% ~ 10% phosphoric acid aqueous solution, ebe e hloekisoa ka metsi a hloekileng.
Nako ea poso: Jun-13-2022