Kupaka chitsulo chopangidwa ndi chitsulo

1. Zipangizo zomangira

(1) Brazing filler metal cast iron brazing imagwiritsa ntchito copper zinc brazing filler metal ndi siliva copper brazing filler metal. Mitundu ya copper zinc brazing filler metal yomwe imagwiritsidwa ntchito kwambiri ndi b-cu62znnimusir, b-cu60zusnr ndi b-cu58znfer. Mphamvu yokoka ya brazed cast iron joint nthawi zambiri imafika 120 ~ 150MPa. Pogwiritsa ntchito copper zinc brazing filler metal, Mn, Ni, Sn, AI ndi zinthu zina zimawonjezedwa kuti brazed joint ikhale ndi mphamvu yofanana ndi chitsulo choyambira.

Kutentha kwa chitsulo chosungunula cha mkuwa wa siliva kumakhala kochepa. Kapangidwe koyipa kakhoza kupewedwa pogwiritsira ntchito chitsulo chosungunula. Cholumikizira cha brazing chimagwira ntchito bwino, makamaka chitsulo chosungunula cha brazing chokhala ndi Ni, monga b-ag50cuzncdni ndi b-ag40cuznsnni, zomwe zimawonjezera mphamvu yomangirira pakati pa chitsulo chosungunula cha brazing ndi chitsulo chosungunula. Ndikoyenera makamaka pogwiritsira ntchito chitsulo chosungunula cha nodular, chomwe chingapangitse cholumikizira kukhala ndi mphamvu yofanana ndi chitsulo choyambira.

(2) Pamene mkuwa ndi zinc zimagwiritsidwa ntchito popanga chitsulo chosungunuka, fb301 ndi fb302 zimagwiritsidwa ntchito kwambiri, kutanthauza borax kapena chisakanizo cha borax ndi boric acid. Kuphatikiza apo, madzi otuluka omwe amapangidwa ndi h3bo340%, li2co316%, na2co324%, naf7.4% ndi nac112.6% ndi abwino.

Mukapaka chitsulo chopangidwa ndi siliva, mutha kusankha ma flux monga fb101 ndi fb102, mwachitsanzo, chisakanizo cha borax, boric acid, potassium fluoride ndi potassium fluoroborate.

2. Ukadaulo wa brazing

Musanagwiritse ntchito chitsulo chopangidwa ndi chitsulo, graphite, oxide, mchenga, banga la mafuta ndi zina zomwe zili pamwamba pa chopangiracho ziyenera kuchotsedwa mosamala. Kutsuka zinthu zosungunuka zachilengedwe kungagwiritsidwe ntchito kuchotsa banga la mafuta, pomwe njira zamakina monga kuphulika kwa mchenga kapena kuphulika kwa mfuti, kapena njira zamagetsi zingagwiritsidwe ntchito kuchotsa graphite ndi ma oxide. Kuphatikiza apo, graphite ikhoza kuchotsedwa poyiwotcha ndi lawi la okosijeni.

Chitsulo chopangidwa ndi chitsulo chosungunula chingatenthedwe ndi moto, ng'anjo kapena induction. Popeza SiO2 ndi yosavuta kupanga pamwamba pa chitsulo chosungunula, mphamvu ya chitsulo chosungunula mumlengalenga woteteza siili bwino. Nthawi zambiri, chitsulo chosungunula chimagwiritsidwa ntchito posungunula. Mukasungunula zinthu zazikulu pogwiritsa ntchito chitsulo chosungunula cha zinc, choyamba muzitha kupopera chitsulo chosungunula pamwamba, kenako zinthuzo ziyenera kuyikidwa mu ng'anjo kuti zitenthedwe kapena kutenthedwa ndi tochi yowotcherera. Chitsulocho chikatenthedwa kufika pa 800 ℃, onjezerani chitsulo chowonjezera, chitentheni kutentha kwa chitsulo chosungunula, kenako pukutani singano m'mphepete mwa cholumikizira kuti musungunule chosungunula ndikudzaza mpata. Pofuna kulimbitsa mphamvu ya cholumikizira chosungunula, chithandizo cha annealing chiyenera kuchitika pa 700 ~ 750 ℃ ​​kwa mphindi 20 mutatha kusungunula, kenako kuziziritsa pang'onopang'ono kuchitike.

Pambuyo popaka chitsulo, madzi ochulukirapo ndi zotsalira zimatha kuchotsedwa potsuka ndi madzi ofunda. Ngati n'zovuta kuchotsa, zitha kutsukidwa ndi yankho la madzi la 10% sulfuric acid kapena yankho la madzi la 5% ~ 10% phosphoric acid, kenako nkutsukidwa ndi madzi oyera.