Ukugquma ngentsimbi ephosiweyo

1. Izinto zokugquma

(1) I-brazing filler metal cast iron brazing ikakhulu isebenzisa i-copper zinc brazing filler metal kunye ne-silver copper brazing filler metal. Iimpawu ze-copper zinc brazing filler metal ezisetyenziswa rhoqo yi-b-cu62znnimusir, b-cu60zusnr kunye ne-b-cu58znfer. Amandla okuxinana kwe-brazed cast iron joint ngokubanzi afikelela kwi-120 ~ 150MPa. Ngokusekelwe kwi-copper zinc brazing filler metal, i-Mn, i-Ni, i-Sn, i-AI kunye nezinye izinto zongezwa ukwenza i-brazed joint ibe namandla afanayo ne-base metal.

Ubushushu bokunyibilika kwesinyithi sesilivere esinobhedu oluyi-brazing filler buphantsi. Ulwakhiwo olunobungozi lunokuthintelwa xa kusenziwa isinyithi esityhidiweyo. Ijoyinti ye-brazing isebenza kakuhle, ingakumbi isinyithi esityhidiweyo esiqulethe i-Ni, njenge-b-ag50cuzncdni kunye ne-b-ag40cuznsnni, ephucula amandla okubopha phakathi kwesinyithi esityhidiweyo kunye nesinyithi esityhidiweyo. Ifanelekile ngokukodwa kwi-brazing yesinyithi esityhidiweyo esine-nodular, enokwenza ijoyinti ibe namandla afanayo nesinyithi esisisiseko.

(2) Xa kusetyenziswa i-copper kunye ne-zinc kwi-brazing cast iron, i-fb301 kunye ne-fb302 zisetyenziswa kakhulu, oko kukuthi, i-borax okanye umxube we-borax kunye ne-boric acid. Ukongeza, i-flux eyenziwe yi-h3bo340%, i-li2co316%, i-na2co324%, i-naf7.4% kunye ne-nac112.6% ingcono.

Xa kusenziwa isinyithi esityhidiweyo ngesilivere, kungakhetha iiflux ezifana ne-fb101 kunye ne-fb102, oko kukuthi, umxube we-borax, i-boric acid, i-potassium fluoride kunye ne-potassium fluoroborate.

2. Itekhnoloji yokurhawula

Ngaphambi kokuba kufakwe isinyithi esityhidiweyo, i-graphite, i-oxide, isanti, i-oyile stain kunye nezinye izinto ezikumphezulu we-casting mazisuswe ngononophelo. Ukucola i-organic solving kungasetyenziselwa ukususa amabala eoyile, ngelixa iindlela zoomatshini ezifana nokuqhumisa isanti okanye ukuqhumisa nge-shot, okanye iindlela ze-electrochemical zingasetyenziselwa ukususa i-graphite kunye nee-oxides. Ukongeza, i-graphite ingasuswa ngokuyitshisa ngelangatye le-oxidizing.

Isinyithi esiqhotsiweyo seBrazing sinokufudunyezwa ngelangatye, isithando somlilo okanye induction. Ekubeni iSiO2 kulula ukuyenza phezu komphezulu wesinyithi esiqhotsiweyo, isiphumo sebrazing kwindawo ekhuselayo asilunganga. Ngokubanzi, i-brazing flux isetyenziselwa ibrazing. Xa ubrazing izinto ezinkulu zokusebenza nge-copper zinc brazing filler metal, umaleko we-brazing flux kufuneka utshizwe kumphezulu ocociweyo kuqala, uze emva koko izinto zokusebenza zifakwe kwisithando somlilo ukuze zifudunyezwe okanye zifudunyezwe ngetotshi yokuwelda. Xa i-workpiece ifudunyezwe ukuya kuthi ga kwi-800 ℃, yongeza i-flux eyongezelelweyo, uyifudumale ukuya kubushushu bebrazing, uze emva koko ukrwele izinto zenaliti kumphetho we-joint ukuze unyibilikise i-solder kwaye uzalise isithuba. Ukuze kuphuculwe amandla e-brazing joint, unyango lwe-annealing kufuneka lwenziwe kwi-700 ~ 750 ℃ ​​kangangemizuzu engama-20 emva kwebrazing, uze emva koko upholise kancinci.

Emva kokugquma, ukugeleza okugqithisileyo kunye nentsalela zingasuswa ngokuhlanjwa ngamanzi afudumeleyo. Ukuba kunzima ukuyisusa, ingacocwa ngesisombululo samanzi se-10% se-sulfuric acid okanye isisombululo samanzi se-5% ~ 10% se-phosphoric acid, uze emva koko ucocwe ngamanzi acocekileyo.