Simbi dzakakosha dzinonyanya kureva Au, Ag, PD, Pt uye zvimwe zvinhu, zvine conductivity yakanaka, thermal conductivity, corrosion resistance uye yakanyanya kunyunguduka tembiricha.Iwo anoshandiswa zvakanyanya mumidziyo yemagetsi kugadzira akavhurika uye akavharika edunhu zvikamu.
(1) Brazing hunhu semidziyo yekubatanidza, simbi dzinokosha dzine hunhu hwakajairwa hwenzvimbo diki yekugezera, iyo inoda kuti brazing seam simbi ine yakanaka kukanganisa kupikisa, kusimba kwepamusoro, kumwe kupikisa oxidation, uye inogona kumira kurwiswa kwearc, asi haichinji maitiro ekubatanidza zvinhu uye magetsi emagetsi ezvikamu.Sezvo nzvimbo yekubatanidza brazing ishoma, solder overflow haibvumirwe, uye iyo brazing process parameters inofanira kunyatsodzorwa.
Mazhinji ekudziya nzira anogona kushandiswa kubhuroka simbi dzinokosha uye simbi dzinokosha dzinobata.Kupisa kwemoto kunowanzoshandiswa kune zvikamu zvakakura zvekusangana;Induction brazing inokodzera kugadzirwa kwakawanda.Resistance brazing inogona kuitwa neyakajairwa yekudzivirira welding muchina, asi madiki ezvino uye akareba nguva yekusimbisa inofanira kusarudzwa.Carbon block inogona kushandiswa se electrode.Kana zvichidikanwa kubhuroka nhamba huru yezvikamu zvekusangana panguva imwe chete kana kubhuroka akawanda maitirwo pane chimwe chinhu, simbi yekubatira inogona kushandiswa.Kana simbi dzakasimba dzakashongedzwa nenzira dzakajairwa mumhepo, mhando yemajoini yakashata, nepo vacuum brazing inogona kuwana emhando yepamusoro majoini, uye zvimiro zvezvinhu zvacho pachazvo hazvikanganiswe.
(2) Goridhe rinopisa uye alloy yaro zvinosarudzwa sesimbi dzekuzadza simbi.Sirivha yakavakirwa uye mhangura yakavakirwa mazadza masimbi anonyanya kushandiswa pakubata, izvo zvisingaite chete kuvimbisa conductivity yejoint yekubhuroka, asi zvakare iri nyore kunyorova.Kana iyo yekubatanidza conductivity inodikanwa inogona kuzadzikiswa, iyo brazing filler simbi ine Ni, PD, Pt uye zvimwe zvinhu zvinogona kushandiswa, uye brazing filler simbi ine brazing nickel, diamond alloy uye yakanaka oxidation kuramba inogona kushandiswa zvakare.Kana Ag Cu Ti brazing filler simbi yasarudzwa, tembiricha yekudziya haifanire kunge yakakwira kupfuura 1000 ℃.
Iyo sirivheri oxide inoumbwa pamusoro pesirivheri haina kugadzikana uye iri nyore kubhuroka.Iko kushambadzira kwesirivha kunogona kushandisa tin lead filler simbi ine zinc chloride aqueous solution kana rosin se flux.Kana kubhuroka, sirivheri yekuzadza simbi inowanzoshandiswa, uye borax, boric acid kana misanganiswa yavo inoshandiswa sebrazing flux.Kana vacuum brazing sirivheri uye sirivheri alloy contacts, sirivheri based brazing filler metals inonyanya kushandiswa, senge b-ag61culn, b-ag59cu5n, b-ag72cu, nezvimwe.
Kune brazing palladium contacts, goridhe rakavakirwa uye nickel-based vatengesi vari nyore kugadzira zvigadziriso zvakasimba, kana sirivheri yakavakirwa, mhangura yakavakirwa kana manganese based solder anogona kushandiswa.Silver base inoshandiswa zvakanyanya kugadzira platinamu uye platinamu alloy contacts.Mhangura yakavakirwa, goridhe yakavakirwa kana palladium yakavakirwa solder.Kusarudza b-an70pt30 brazing filler metal haigoni kungoshandura ruvara rweplatinamu, asi zvakare zvinobudirira kuvandudza tembiricha yekutsikirira yejoinhi yebrazing uye kuwedzera kusimba uye kuomarara kwekubatana kwebrazing.Kana iyo platinamu yekubata ichizoiswa brazed yakananga pa kovar alloy, b-ti49cu49be2 solder inogona kusarudzwa.Pamabatirwo eplatinamu ane tembiricha yekushanda isingadariki 400 ℃ muisina corrosive medium, oxygen isina pure copper solder ine mutengo wakaderera uye kuita kwakanaka kwekuita kuchasarudzwa.
(3) Usati wapisa, weldment, kunyanya musangano wekusangana, ichaongororwa.Mabatirwo anobaiwa kubva mundiro yakatetepa kana kuchekwa kubva pamutsetse haafaniri kuremara nekuda kwekurovera nekucheka.Iyo brazing pamusoro peiyo yekusangana inoumbwa nekugumburisa, kudzvanya kwakanaka uye kuforoma kunofanirwa kuve kwakatwasuka kuti ive nechokwadi chekubata kwakanaka neiyo flat surface yerutsigiro.Iyo yakakomberedzwa pamusoro pechikamu chinofanira kusungirirwa kana pamusoro pechero radius inofanirwa kuenderana kuti ive nechokwadi chakakodzera capillary effect panguva yekubhuroka.
Asati avhara emhando dzakasiyana-siyana, iyo oxide firimu iri pamusoro peiyo weldment ichabviswa nemakemikari kana michina nzira, uye pamusoro peiyo weldment ichacheneswa nekunatswa nepeturu kana doro kubvisa mafuta, girisi, guruva uye tsvina inotadzisa kunyorova. uye kuyerera.
Kune madiki weldments, iyo inonamira ichashandiswa kune pre positioning kuti ive nechokwadi chekuti haizochinji panguva yekubata kwechoto kuchaja uye filler simbi kuchaja, uye chinonamira chinoshandiswa hachizokonzerese kukuvadza kune brazing.Kune weldment hombe kana yakakosha kuonana, gungano uye kumira kunofanirwa kunge kuri kuburikidza nekugadzirisa nemukuru kana groove kuita weldment mune yakagadzikana.
Nekuda kweiyo yakanaka yekupisa conductivity yezvinhu zvakakosha zvesimbi, mwero wekupisa unofanirwa kutariswa zvinoenderana nerudzi rwezvinhu.Munguva yekutonhora, chiyero chinofanira kudzorwa zvakanaka kuita brazing joint stress yunifomu;Iyo yekudziya nzira ichaita kuti zvikamu zvakashongedzwa zvisvike pakudziya kwebrazing panguva imwe chete.Kune madiki akakosha masimbi anobatika, kupisa kwakananga kunofanirwa kudzivirirwa uye zvimwe zvikamu zvinogona kushandiswa pakudziisa.Imwe dzvinyiriro ichaiswa kune iyo yekubata kuti iyo yekubata igadziriswe kana solder yanyungudika nekuyerera.Kuti uchengetedze kuomarara kwetsigiro yekubata kana tsigiro, annealing ichadziviswa.Iyo yekudziya inogona kuganhurirwa kune iyo brazing nzvimbo, sekugadzirisa chinzvimbo panguva yekupisa kwemoto, induction brazing kana kuramba brazing.Mukuwedzera, kuitira kudzivirira solder kubva pakunyungudutsa simbi dzinokosha, matanho akadai sekudzora kuwanda kwekutengesa, kudzivisa kupisa kwakanyanya, kuderedza nguva yekuputira pakupisa kwekupisa, uye kuita kuti kupisa kugovaniswe zvakaenzana kunogona kutorwa.
Nguva yekutumira: Jun-13-2022