Brazing ntawm cam khwb cia hlau

1. Cov khoom siv brazing

(1) Brazing muab tub lim hlau cam khwb cia hlau brazing tsuas yog siv tooj liab zinc brazing muab tub lim hlau thiab nyiaj tooj liab brazing muab tub lim hlau.Feem ntau siv tooj liab zinc brazing muab tub lim hlau hom yog b-cu62znnimusir, b-cu60zusnr thiab b-cu58znfer.Lub zog tensile ntawm brazed hlau sib koom ua ke hlau sib koom tes dav dav 120 ~ 150mpa.Ntawm lub hauv paus ntawm tooj liab Zinc Brazing muab tub rog hlau, mn, ni, ni, nab thiab lwm cov khoom sib koom ua ke muaj tib lub zog nrog lub hauv paus hlau.

Lub melting kub ntawm nyiaj tooj liab brazing muab tub lim hlau yog tsawg.Cov qauv tsim kev puas tsuaj tuaj yeem zam tau thaum brazing cam khwb cia hlau.Lub brazing kev sib koom tes muaj kev ua tau zoo, tshwj xeeb tshaj yog cov brazing muab tub lim hlau uas muaj Ni, xws li b-ag50cuzncdni thiab b-ag40cuznsnni, uas txhim kho lub zog ntawm kev sib khi ntawm lub brazing muab tub lim hlau thiab cam khwb cia hlau.Nws yog tshwj xeeb tshaj yog haum rau lub brazing ntawm nodular cam khwb cia hlau, uas yuav ua rau cov kev sib koom ua ke muaj lub zog tib yam nrog lub hauv paus hlau.

(2) Thaum tooj liab thiab zinc yog siv rau brazing cam khwb cia hlau, fb301 thiab fb302 feem ntau yog siv, uas yog, borax los yog ib tug sib tov ntawm borax thiab boric acid.Tsis tas li ntawd, cov flux muaj li H3bo340%, LI2CO316%, NAF7.4% thiab NAC112.6% yog qhov zoo dua.

Thaum brazing cam khwb cia hlau nrog nyiaj tooj liab muab tub lim hlau, fluxes xws li fb101 thiab fb102 tuaj yeem xaiv tau, piv txwv li kev sib xyaw ntawm borax, boric acid, potassium fluoride thiab potassium fluoroborate.

2. Brazing tshuab

Ua ntej brazing cam khwb cia hlau, graphite, oxide, xuab zeb, roj stain thiab lwm yam sundries ntawm lub casting nto yuav tsum tau ua tib zoo tshem tawm.Organic solvent scrubbing tuaj yeem siv los tshem tawm cov roj stains, thaum siv cov txheej txheem xws li xuab zeb blasting lossis tua blasting, los yog cov txheej txheem electrochemical tuaj yeem siv los tshem tawm graphite thiab oxides.Tsis tas li ntawd, graphite tuaj yeem raug tshem tawm los ntawm hlawv nws nrog oxidizing nplaim taws.

Brazing cam khwb cia hlau tuaj yeem ua kom sov los ntawm nplaim taws, qhov cub lossis induction.Txij li SiO2 yooj yim tsim rau saum npoo ntawm cam khwb cia hlau, cov nyhuv brazing hauv kev tiv thaiv huab cua tsis zoo.Feem ntau, brazing flux yog siv rau brazing.Thaum brazing loj workpieces nrog tooj liab zinc brazing muab tub lim hlau, ib txheej ntawm brazing flux yuav tsum tau txau rau ntawm qhov chaw ntxuav ua ntej, thiab tom qab ntawd cov workpieces yuav tsum muab tso rau hauv lub qhov cub kom cua sov los yog rhuab nrog lub vuam teeb.Thaum lub workpiece yog rhuab rau txog 800 ℃, ua kom sov ntxiv, ua kom sov, thiab tom qab ntawd txhuam cov khoom siv cov koob rau ntawm qhov sib koom ua ke thiab sau qhov sib txawv.Txhawm rau txhim kho lub zog ntawm kev sib koom ua ke ntawm kev sib koom ua ke, anealing kev kho yuav tsum tau ua ntawm 700 ~ 750 ℃ ​​rau 20min tom qab kev nkag mus txias, thiab tom qab ntawd maj mam txias yuav tsum tau nqa tawm.

Tom qab brazing, cov dej ntau dhau thiab cov seem tuaj yeem raug tshem tawm los ntawm kev ntxuav nrog dej sov.Yog tias nws nyuaj rau tshem tawm, nws tuaj yeem ntxuav nrog 10% sulfuric acid aqueous daws lossis 5% ~ phosphoric acrosous daws, thiab tom qab ntawd ntxuav nrog dej huv.