Kuwotcha kwachitsulo chachitsulo

1. Kuwotcha zinthu

(1) Brazing filler metal cast iron brazing makamaka imatenga copper zinc brazing filler zitsulo ndi siliva copper brazing filler zitsulo.Mitundu yachitsulo yomwe imagwiritsidwa ntchito kwambiri ndi copper zinc brazing filler ndi b-cu62znnimusir, b-cu60zusnr ndi b-cu58znfer.Kulimba kwachitsulo cholumikizira chitsulo chosungunuka nthawi zambiri kumafika 120 ~ 150MPa.Pamaziko a zitsulo zamkuwa zamkuwa zodzaza zitsulo, Mn, Ni, Sn, AI ndi zinthu zina zimawonjezedwa kuti mgwirizano wa brazed ukhale ndi mphamvu zofanana ndi zitsulo zoyambira.

Kutentha kosungunuka kwa chitsulo chamkuwa cha brazing filler ndikotsika.Kapangidwe kovulaza kumatha kupewedwa mukamangirira chitsulo.Cholumikizira cha brazing chimagwira ntchito bwino, makamaka chitsulo chodzaza ndi Ni, monga b-ag50cuzncdni ndi b-ag40cuznsnni, chomwe chimalimbitsa mphamvu yomangirira pakati pa chitsulo chodzaza ndi chitsulo ndi chitsulo.Ndikoyenera makamaka kutsekemera kwa chitsulo cha nodular cast, chomwe chingapangitse kuti mgwirizano ukhale ndi mphamvu zofanana ndi zitsulo zoyambira.

(2) Pamene mkuwa ndi zinki zimagwiritsidwa ntchito popanga chitsulo chosungunula, fb301 ndi fb302 zimagwiritsidwa ntchito makamaka, ndiko kuti, borax kapena kusakaniza kwa borax ndi boric acid.Kuphatikiza apo, flux yopangidwa ndi h3bo340%, li2co316%, na2co324%, naf7.4% ndi nac112.6% ndiyabwino.

Mukawotcha chitsulo chonyezimira ndi zitsulo zasiliva zamkuwa, ma fluxes monga fb101 ndi fb102 amatha kusankhidwa, mwachitsanzo, kusakaniza kwa borax, boric acid, potaziyamu fluoride ndi potaziyamu fluoroborate.

2. Zipangizo zamakono

Pamaso brazing kuponyedwa chitsulo, graphite, okusayidi, mchenga, mafuta banga ndi zina sundries pa kuponyera pamwamba ayenera kuchotsedwa mosamala.Zosungunulira za organic scrubbing zitha kugwiritsidwa ntchito pochotsa madontho amafuta, pomwe njira zamakina monga kuphulitsa mchenga kapena kuphulika, kapena njira za electrochemical zingagwiritsidwe ntchito kuchotsa ma graphite ndi ma oxide.Kuphatikiza apo, graphite imatha kuchotsedwa ndikuwotcha ndi lawi la oxidizing.

Brazing cast iron imatha kutenthedwa ndi moto, ng'anjo kapena kulowetsa.Popeza SiO2 ndi yosavuta kupanga pamwamba pa chitsulo choponyedwa, mphamvu yowotcha mumlengalenga yoteteza si yabwino.Kawirikawiri, brazing flux imagwiritsidwa ntchito popanga brazing.Mukawotcha zida zazikulu zogwirira ntchito ndi chitsulo chamkuwa cha zinc brazing filler, wosanjikiza wa brazing flux uyenera kupopera pamalo oyeretsedwa poyamba, kenako zogwirira ntchitozo zimayikidwa mu ng'anjo kuti ziwotche kapena kutenthetsa ndi tochi yowotcherera.Chombocho chikatenthedwa kufika pafupifupi 800 ℃, onjezerani chowonjezera chowonjezera, chotenthetsera kutentha kwamoto, ndiyeno sulani singano m'mphepete mwa olowa kuti musungunule solder ndikudzaza kusiyana.Pofuna kulimbitsa mphamvu ya olowa brazed, mankhwala annealing ayenera kuchitidwa pa 700 ~ 750 ℃ ​​kwa 20min pambuyo brazed, ndiyeno kuziziritsa pang'onopang'ono kudzachitika.

Pambuyo pakuwotcha, kutulutsa kowonjezera ndi zotsalira zimatha kuchotsedwa ndikutsuka ndi madzi ofunda.Ngati ndizovuta kuchotsa, zitha kutsukidwa ndi 10% sulfuric acid amadzimadzi kapena 5% ~ 10% phosphoric acid amadzimadzi, ndiyeno kutsukidwa ndi madzi oyera.