Ukuxutywa kwentsimbi

1. Izinto zokubrasha

(1) Isithambiso sentsimbi yokuphonswa kwesinyithi sokujongisisa ikakhulu kwamkela isinyithi sobhedu sokujongisa isinyithi kunye nesilivere yobhedu yokufaka isinyithi.I-zinc brazing filler metal brands eziqhelekileyo ezisetyenziswa ngokuqhelekileyo ziyi-b-cu62znnimusir, b-cu60zusnr kunye ne-b-cu58znfer.Amandla okuqina komdibaniso wentsimbi etyhidiweyo ngokubanzi afikelela kwi-120 ~ 150MPa.Ngesiseko se-copper zinc brazing filler metal, Mn, Ni, Sn, AI kunye nezinye izinto zongezwa ukwenza i-brazed joint ibe namandla afanayo kunye nesiseko sesinyithi.

Ubushushu obunyibilikayo besinyithi sobhedu bebrazing yesilivere buphantsi.Isakhiwo esinobungozi sinokuphetshwa xa kubhengezwa intsimbi.Umdibaniso wokuqhafaza unomsebenzi omhle, ngakumbi isinyithi esine-brazing esine-Ni, efana ne-b-ag50cuzncdni kunye ne-b-ag40cuznsnni, ephucula amandla okubopha phakathi kwentsimbi yokuqhafaza kunye nentsimbi.Kufanelekile ngokukhethekileyo ukubethelwa kwentsimbi ye-nodular cast, enokwenza ukuba umdibaniso ube namandla afanayo kunye nesiseko sesinyithi.

(2) Xa ubhedu kunye nezinki zisetyenziselwa ukuphoswa kwentsimbi, i-fb301 kunye ne-fb302 zisetyenziswa kakhulu, oko kukuthi, iboraksi okanye umxube weboraksi kunye ne-boric acid.Ukongezelela, i-flux eyenziwe nge-h3bo340%, i-li2co316%, i-na2co324%, i-naf7.4% kunye ne-nac112.6% ingcono.

Xa intsimbi etyhidiweyo yentsimbi kunye nentsimbi yesiliva yobhedu, i-fluxes efana ne-fb101 kunye ne-fb102 inokukhethwa, oko kukuthi umxube we-borax, i-boric acid, i-potassium fluoride kunye ne-potassium fluoroborate.

2. Iteknoloji yokubrawuza

Ngaphambi kokutshisa isinyithi, i-graphite, i-oxide, isanti, i-oyile ibala kunye nezinye i-sundries kwindawo yokuphosa ziya kususwa ngononophelo.I-Organic solvent scrubbing ingasetyenziselwa ukususa amabala e-oyile, ngelixa iindlela zomatshini ezifana nokuqhunyiswa kwesanti okanye ukudubula ukudubula, okanye iindlela ze-electrochemical zingasetyenziselwa ukususa i-graphite kunye ne-oxides.Ukongeza, igraphite inokususwa ngokuyitshisa ngedangatye eline-oxidizing.

I-Brazing cast iron inokufudumala ngedangatye, isithando somlilo okanye ukufakwa.Ekubeni i-SiO2 ilula ukwenza phezu kwendawo yentsimbi, umphumo wokubhobhoza kwindawo yokukhusela ayilungile.Ngokuqhelekileyo, i-brazing flux isetyenziselwa ukudibanisa.Xa ubhobhoza izixhobo zokusebenza ezinkulu ngesinyithi se-zinc brazing filler, umaleko we-brazing flux uya kutshizwa kwindawo ecociweyo kuqala, emva koko izinto zokusebenza ziya kufakwa kwiziko lokufudumeza okanye ukufudumeza ngetotshi ye-welding.Xa i-workpiece ishushu malunga ne-800 ℃, yongeza i-flux eyongezelelweyo, yifudumeze kwiqondo lokushisa lokuqhaqha, kwaye emva koko ukhuhle imathiriyeli yenaliti emphethweni we-joint ukunyibilikisa i-solder kwaye ugcwalise isithuba.Ukuze kuphuculwe ukomelela komdibaniso webrazed, unyango lwe-annealing luya kwenziwa kwi-700 ~ 750 ℃ ​​nge-20min emva kokubrawuza, kwaye ke ukupholisa okucothayo kuya kwenziwa.

Emva kokuqhaqha, ukugqithisa okugqithisileyo kunye ne-residu inokususwa ngokuhlamba ngamanzi afudumeleyo.Ukuba kunzima ukususa, kunokucocwa nge-10% ye-sulfuric acid isisombululo se-aqueous okanye i-5% ~ 10% ye-phosphoric acid isisombululo se-aqueous, emva koko ihlambuluke ngamanzi acocekileyo.