1. Izinto zokubopha
(1) I-brazing filler metal cast iron brazing ikakhulukazi isebenzisa i-copper zinc brazing filler metal kanye ne-silver copper brazing filler metal. Izinhlobo ze-copper zinc brazing filler metal ezivame ukusetshenziswa yi-b-cu62znnimusir, b-cu60zusnr kanye ne-b-cu58znfer. Amandla okuthamba kwe-brazed cast iron joint ngokuvamile afinyelela ku-120 ~ 150MPa. Ngokusekelwe ku-copper zinc brazing filler metal, i-Mn, i-Ni, i-Sn, i-AI nezinye izinto zengezwa ukuze i-brazed joint ibe namandla afanayo ne-base metal.
Izinga lokushisa lokuncibilika kwensimbi yesiliva yokugcwalisa ithusi liphansi. Isakhiwo esiyingozi singagwenywa lapho kugcwaliswa insimbi ephonswe nge-brazing. Ijoyinti yokugcwalisa ithusi isebenza kahle, ikakhulukazi insimbi yokugcwalisa ithusi equkethe i-Ni, njenge-b-ag50cuzncdni kanye ne-b-ag40cuznsnni, okuthuthukisa amandla okubopha phakathi kwensimbi yokugcwalisa ithusi kanye nensimbi ephonswe nge-brazing. Ifaneleka kakhulu ekufakweni kwensimbi ephonswe nge-nodular, okungenza ijoyinti libe namandla afanayo nensimbi eyisisekelo.
(2) Uma ithusi ne-zinc kusetshenziswa insimbi ecijile, i-fb301 ne-fb302 kusetshenziswa kakhulu, okungukuthi, i-borax noma ingxube ye-borax ne-boric acid. Ngaphezu kwalokho, i-flux eyenziwe nge-h3bo340%, i-li2co316%, i-na2co324%, i-naf7.4% kanye ne-nac112.6% ingcono.
Uma ufaka insimbi ephonswe ngensimbi yesiliva, kungakhethwa ama-flux afana ne-fb101 kanye ne-fb102, okungukuthi ingxube ye-borax, i-boric acid, i-potassium fluoride kanye ne-potassium fluoroborate.
2. Ubuchwepheshe be-brazing
Ngaphambi kokusebenzisa insimbi ephonswe nge-brazing, i-graphite, i-oxide, isihlabathi, i-oyela stain kanye nezinye izinto ezisetshenziswayo ebusweni bokuphonswa kufanele zisuswe ngokucophelela. Ukuhlikihla nge-organic solvent kungasetshenziswa ukususa amabala kawoyela, kanti izindlela zemishini ezifana nokuqhumisa isihlabathi noma ukuqhumisa ngokudubula, noma izindlela ze-electrochemical zingasetshenziswa ukususa i-graphite nama-oxide. Ngaphezu kwalokho, i-graphite ingasuswa ngokuyishisa ngelangabi elikhipha i-oxidizing.
Insimbi ecijile yokubumba ingashiswa ilangabi, isithando somlilo noma ukufakelwa. Njengoba i-SiO2 kulula ukuyibumba phezu kwensimbi ecijile, umphumela wokubumba endaweni evikelayo awulungile. Ngokuvamile, ukubumba kwensimbi kusetshenziselwa ukubumba. Lapho ubumba izinsimbi ezinkulu ngensimbi yokugcwalisa insimbi ye-zinc brazing, ungqimba lwe-flux yokubumba kufanele lufuthwe endaweni ehlanziwe kuqala, bese izinsimbi zomsebenzi zifakwa esithandweni ukuze zifudumale noma zishiswe ngethoshi lokushisela. Lapho insimbi ishiswa cishe ku-800 ℃, engeza ukubumba okwengeziwe, ukushise kuze kufike ekushiseni kwe-brazing, bese uklwebha izinto zenaliti emaphethelweni ejoyinti ukuze uncibilikise i-solder bese ugcwalisa igebe. Ukuze kuthuthukiswe amandla ejoyinti elicijile, ukwelashwa kokuncibilikisa kufanele kwenziwe ku-700 ~ 750 ℃ imizuzu engama-20 ngemuva kokubumba, bese kuba ukupholisa kancane.
Ngemva kokubilisa, ukugeleza okuningi kanye nezinsalela kungasuswa ngokugeza ngamanzi afudumele. Uma kunzima ukususa, kungahlanzwa ngesisombululo samanzi esingu-10% se-sulfuric acid noma isisombululo samanzi esingu-5% ~ 10% se-phosphoric acid, bese kuhlanzwa ngamanzi ahlanzekile.
Isikhathi sokuthunyelwe: Juni-13-2022