Brazing muvacuum furnace inzira nyowani yekubhuroka isina flux pasi pevacuum mamiriro.Nekuti iyo brazing iri munzvimbo yevacuum, inokuvadza mhedzisiro yemhepo pane workpiece inogona kunyatso kubviswa, saka brazing inogona kuitwa zvinobudirira pasina kushandisa flux.Inonyanya kushandiswa kugadzira simbi uye alloys ayo akaoma kubhuroka, senge aluminium alloy, titanium alloy, superalloy, refractory alloy uye ceramics.Iyo brazed joint inopenya uye yakaoma, ine yakanaka mechanical zvivakwa uye corrosion resistance.Vacuum brazing midziyo haiwanzo kushandiswa kugadzira tsono yekabhoni simbi uye yakaderera alloy simbi.
Midziyo yekubatira muvacuum choto inonyanya kuumbwa yevacuum brazing choto uye vacuum system.Kune mhando mbiri dzevacuum brazing Furnaces: inopisa moto uye inotonhora moto.Mhando mbiri dzevira dzinogona kupiswa negasi rechisikigo kana kupisa kwemagetsi.Iwo anogona kugadzirwa ari padivi akaiswa choto, pazasi akaiswa choto kana pamusoro akaiswa choto (Kang mhando) chimiro, uye vacuum system inogona kuve yepasirese.
Vacuum system inonyanya kusanganisira vacuum unit, vacuum pipeline, vacuum valve, etc. Vacuum unit inowanzo umbwa ne rotary vane mechanical pump uye mafuta diffusion pump.Kushandisa kamwechete mechanical pombi inogona kungowana isingasviki 1.35 × Vacuum degree ye10-1pa level.Kuti uwane vacuum yakakwirira, pombi yekuparadzira mafuta inofanira kushandiswa panguva imwe chete, iyo inogona kusvika 1.35 panguva ino × Vacuum degree ye10-4Pa level.Kumanikidza kwegasi muhurongwa kunoyerwa negeji yevacuum.
Kupisa muchoto chevacuum kuri kupisa muchoto kana mukamuri yekupisa ine mweya wakabviswa.Iyo inonyanya kukodzera kubhuroka majoini makuru uye anoenderera.Inokodzerawo kubatanidza mamwe simbi yakakosha, kusanganisira titanium, zirconium, niobium, molybdenum uye tantalum.Nekudaro, vacuum brazing zvakare ine zvinotevera zvakaipa:
① Mumamiriro ezvinhu evacuum, simbi iri nyore kunyungudutsa, saka vacuum brazing haifanirwe kushandiswa kune base simbi uye solder welding zvinhu zvinoputika.Kana zvichidikanwa, matanho akaomarara anowirirana anofanira kutorwa.
② Vacuum brazing inonzwa nekukasharara kwepasi, kunaka kwegungano uye kushivirira kwakakodzera kwezvikamu zvakasungwa, uye ine zvinodiwa zvakanyanya zvenzvimbo yekushanda uye theoretical level yevashandisi.
③ Vacuum midziyo yakaoma, ine hombe yenguva imwe chete yekudyara uye yakakwira mutengo wekugadzirisa.
Saka, maitiro ekuita iyo brazing process mu vacuum furnace?Kana brazing ichiitwa muchoto chevacuum, isa weldment ine welding muchoto (kana mumudziyo unopisa), vhara gonhi rechoto (kana kuvhara chivharo chemudziyo wesimbi), uye pre vacuumize usati wapisa.Tanga pombi yemagetsi kutanga, shandura vharuvhu yekugezera mushure mekunge dhigirii revhacuum rasvika 1.35pa, vhara nzira yakatwasuka pakati pepombi yemuchina nechoto chinopisa, ita pombi yakabatana nechoto chinopisa kuburikidza nepombi yekuparadzira, shanda mukati menguva shoma. uchivimba nepombi yemagetsi uye pombi yekuparadzira, pomba choto chebrazing kusvika kune inodiwa vacuum degree, uye wobva watanga kupisa kwemagetsi.
Munguva yese yekuita tembiricha yekukwira nekudziya, iyo vacuum unit icharamba ichishanda kuchengetedza iyo vacuum dhigirii muchoto, kumisa kubuda kwemhepo munzvimbo dzakasiyana dzevacuum system nechoto chekupisa, kuburitswa kwegasi uye mhute yemvura inoshambadzirwa nechoto. wall, fixture uye weldment, uye volatilization yesimbi uye oxide, kuitira kuderedza kudonha kwemhepo kwechokwadi.Kune marudzi maviri evacuum brazing: high vacuum brazing uye partial vacuum (yepakati vacuum) brazing.High vacuum brazing yakanyatsokodzera kubhuroka simbi yepasi iyo oxide inonetsa kuora (senge nickel base superalloy).Partial vacuum brazing inoshandiswa kune iyo nguva iyo base simbi kana solder inonyungudika pasi pekushisa kwekupisa uye yakakwirira vacuum mamiriro.
Kana chenjedzo dzakakosha dzichifanirwa kutorwa kuti ive nehutsanana hwakanyanya, vacuum yekuchenesa nzira inogamuchirwa isati yaoma hydrogen brazing.Saizvozvo, kushandisa yakaoma haidhirojeni kana inert gasi yekuchenesa nzira pamberi pekupomba kwevacuum kuchabatsira kuwana mhedzisiro iri nani mukukwirisa vacuum brazing.
Nguva yekutumira: May-07-2022