Brazing ti simẹnti irin

1. Brazing ohun elo

(1) Brazing kikun irin simẹnti irin brazing ni akọkọ gba Ejò zinc brazing irin kikun irin ati fadaka idẹ brazing irin.Awọn ami iyasọtọ irin ti o kun epo zinc brazing ti o wọpọ jẹ b-cu62znnimusir, b-cu60zusnr ati b-cu58znfer.Agbara fifẹ ti isẹpo simẹnti irin brazed ni gbogbogbo de 120 ~ 150MPa.Lori ipilẹ ti Ejò zinc brazing metal filler, Mn, Ni, Sn, AI ati awọn eroja miiran ni a ṣafikun lati jẹ ki isẹpo brazed ni agbara kanna pẹlu irin ipilẹ.

Awọn yo otutu ti fadaka Ejò brazing irin kikun ti wa ni kekere.Ilana ipalara le yago fun nigbati o ba npa simẹnti irin.Apapọ brazing ni iṣẹ to dara, paapaa irin filler brazing ti o ni Ni, gẹgẹbi b-ag50cuzncdni ati b-ag40cuznsnni, eyiti o mu agbara abuda laarin irin filler brazing ati iron iron.O dara julọ fun brazing ti irin simẹnti nodular, eyi ti o le jẹ ki isẹpo ni agbara kanna pẹlu irin ipilẹ.

(2) Nigbati a ba lo bàbà ati zinc fun irin simẹnti brazing, fb301 ati fb302 ni a lo ni pataki, iyẹn ni, borax tabi adalu borax ati boric acid.Ni afikun, ṣiṣan ti o jẹ h3bo340%, li2co316%, na2co324%, naf7.4% ati nac112.6% dara julọ.

Nigbati o ba n ṣe irin brazing pẹlu fadaka idẹ kikun irin, awọn ṣiṣan bii fb101 ati fb102 ni a le yan, ie adalu borax, boric acid, potassium fluoride ati potasiomu fluoroborate.

2. Brazing ọna ẹrọ

Ṣaaju mimu irin simẹnti, graphite, oxide, iyanrin, idoti epo ati awọn oriṣiriṣi miiran lori ilẹ simẹnti ni a gbọdọ yọkuro ni pẹkipẹki.Organic epo scrubbing le ṣee lo lati yọ awọn abawọn epo, nigba ti darí ọna bi iyanrin fifún tabi shot iredanu, tabi electrochemical ọna le ṣee lo lati yọ graphite ati oxides.Ni afikun, graphite le yọkuro nipasẹ sisun pẹlu ina oxidizing.

Simẹnti brazing le jẹ kikan nipasẹ ina, ileru tabi fifa irọbi.Niwọn igba ti SiO2 rọrun lati dagba lori ilẹ ti irin simẹnti, ipa brazing ni oju-aye aabo ko dara.Ni gbogbogbo, ṣiṣan brazing ni a lo fun brazing.Nigbati brazing ti o tobi workpieces pẹlu Ejò zinc brazing irin kikun, Layer ti brazing ṣiṣan yoo wa ni sprayed lori awọn ti mọ dada akọkọ, ati ki o si awọn workpieces yoo wa ni fi sinu ileru fun alapapo tabi kikan pẹlu kan alurinmorin ògùṣọ.Nigbati iṣẹ-iṣẹ ba gbona si iwọn 800 ℃, ṣafikun ṣiṣan afikun, gbona si iwọn otutu brazing, ati lẹhinna ge ohun elo abẹrẹ naa ni eti isẹpo lati yo solder ki o kun aafo naa.Lati le ni ilọsiwaju agbara ti isẹpo brazed, itọju annealing yoo ṣee ṣe ni 700 ~ 750 ℃ ​​fun 20min lẹhin brazing, ati lẹhinna itutu agbaiye yoo ṣee ṣe.

Lẹhin brazing, ṣiṣan pupọ ati iyokù le yọkuro nipasẹ fifọ pẹlu omi gbona.Ti o ba ṣoro lati yọ kuro, o le di mimọ pẹlu 10% sulfuric acid aqueous solution tabi 5% ~ 10% phosphoric acid aqueous ojutu, ati lẹhinna ti mọtoto pẹlu omi mimọ.