1. Zvinhu zvesimbi
(1) Brazing filler metal cast iron brazing inonyanya kushandisa copper zinc brazing filler metal uye silver copper brazing filler metal. Mhando dze copper zinc brazing filler metal dzinonyanya kushandiswa ndedze b-cu62znnimusir, b-cu60zusnr uye b-cu58znfer. Simba rekusimba re brazed cast iron joint rinowanzo kusvika 120 ~ 150MPa. Zvichibva pa copper zinc brazing filler metal, Mn, Ni, Sn, AI nezvimwe zvinhu zvinowedzerwa kuti brazed joint ive nesimba rakafanana ne base metal.
Kupisa kwekunyunguduka kwesimbi yesirivha ine mhangura yesimbi kwakaderera. Chimiro chinokuvadza chinogona kudzivirirwa kana simbi ine mhangura. Joini yesimbi ine mashandiro akanaka, kunyanya simbi ine mhangura ine Ni, yakadai se b-ag50cuzncdni uye b-ag40cuznsnni, iyo inowedzera simba rekubatanidza pakati pesimbi ine mhangura yesimbi nesimbi yakakandwa. Yakakodzera zvakanyanya simbi ine mhangura, iyo inogona kuita kuti joini ive nesimba rakafanana nesimbi yepasi.
(2) Kana mhangura ne zinc zvichishandiswa pakugadzira simbi yakakandwa, fb301 ne fb302 zvinonyanya kushandiswa, kureva, borax kana musanganiswa we borax ne boric acid. Pamusoro pezvo, flux inoumbwa ne h3bo340%, li2co316%, na2co324%, naf7.4% uye nac112.6% iri nani.
Pakuputira simbi yakakandwa nesimbi yesirivha yekuzadza mhangura, maflux akadai se fb101 ne fb102 anogona kusarudzwa, kureva musanganiswa we borax, boric acid, potassium fluoride uye potassium fluoroborate.
2. Tekinoroji yekuisa mabrazing
Musati maisa simbi yakakandwa, graphite, oxide, jecha, oil stain nezvimwe zvinhu zviri pamusoro pechinhu chinofanira kubviswa nokungwarira. Kukwesha organic solvent kunogona kushandiswa kubvisa mavanga emafuta, nepo nzira dzemuchina dzakadai sejecha blasting kana shot blasting, kana nzira dzemagetsi dzinogona kushandiswa kubvisa graphite nema oxides. Pamusoro pezvo, graphite inogona kubviswa nekuipisa nemurazvo we oxidizing.
Simbi yesimbi inogona kupiswa nemoto, furnace kana induction. Sezvo SiO2 iri nyore kuumbwa pamusoro pesimbi yakakandwa, simba resimbi mumhepo inodzivirira harina kunaka. Kazhinji, simbi yesimbi inoshandiswa pakugadzira simbi. Pakugadzira simbi huru nesimbi yesimbi yesimbi yemhangura, jira resimbi yesimbi inofanira kupfapfaidzwa pamusoro pechinhu chakacheneswa kutanga, uye simbi dzinofanira kuiswa muchoto kuti dzipiswe kana kudziiswa netochi yesimbi. Kana simbi yesimbi yapiswa kusvika pa800 ℃, wedzera mvura yekuwedzera, ipise kusvika pakupisa kwesimbi, wobva wakwesha zvinhu zvetsono pamucheto wejointi kuti unyungudise solder wozadza nzvimbo yacho. Kuti uwedzere simba rejoin yakakandwa, mushonga we annealing unofanira kuitwa pa700 ~ 750 ℃ kwemaminitsi makumi maviri mushure mekugadzira, uye wozotonhodza zvishoma nezvishoma.
Mushure mekuputira, mvura yakawandisa uye zvasara zvinogona kubviswa nekushambidzwa nemvura inodziya. Kana zvakaoma kubvisa, zvinogona kucheneswa ne10% sulfuric acid aqueous solution kana 5% ~ 10% phosphoric acid aqueous solution, uye zvozocheneswa nemvura yakachena.
Nguva yekutumira: Chikumi-13-2022