Ko nezve welding mhedzisiro yevacuum brazing furnace

Ko nezve welding mhedzisiro yevacuum brazing furnace

Iyo nzira yekubhuroka muvacuum vira inzira nyowani yekubhuroka isina flux pasi pevacuum mamiriro.Nekuti iyo brazing iri munzvimbo yevacuum, iyo inokuvadza mhedzisiro yemhepo pane workpiece inogona kunyatso kubviswa, saka iyo brazing inogona kubudirira kuitwa pasina kushandisa flux.Inonyanya kushandiswa kugadzira simbi uye alloys yakaoma kubhuroka, senge aruminiyamu alloys, titanium alloys, high-temperature alloys, refractory alloys uye ceramics.Iyo brazed joint inopenya uye compact, ine yakanaka ma mechanical properties uye corrosion resistance.Vacuum brazing midziyo haiwanzo kushandiswa kugadzira tsono yekabhoni simbi uye yakaderera alloy simbi.

Brazing midziyo muvacuum choto inonyanya kuumbwa yevacuum brazing choto uye vacuum system.Kune mhando mbiri dzevacuum brazing Furnaces: inopisa moto uye inotonhora moto.Iwo marudzi maviri echoto anogona kupiswa negasi rechisikigo kana kupisa kwemagetsi, uye anogona kugadzirwa muchoto chakaiswa padivi, pazasi akaiswa choto kana pamusoro akaiswa choto (Kang type) chimiro.Iyo vacuum system inogona kushandiswa zvachose.

Vacuum system inonyanya kusanganisira vacuum unit, vacuum pipeline, vacuum valve, etc. Vacuum unit inowanzo umbwa ne rotary vane mechanical pombi uye mafuta diffusion pump.Mechanical pombi chete inogona kuwana isingasviki 1.35 × Vacuum degree ye10-1pa level.Kuti uwane vacuum yakakwirira, pombi yekuparadzira mafuta inofanira kushandiswa panguva imwe chete.Panguva ino, inogona kusvika 1.35 × Vacuum degree ye10-4Pa level.Kumanikidza kwegasi muhurongwa kunoyerwa negeji yevacuum.

Kupisa muchoto chevacuum ndiko kupinza muchoto kana mukamuri yekupisa nemhepo inobviswa.Iyo inonyanya kukodzera kubhuroka majoini makuru uye anoenderera, uye akakodzera kubatanidza mamwe masimbi akakosha, anosanganisira titanium, zirconium, niobium, molybdenum uye tantalum.Iine huwandu hwakawanda hwekushandisa.Nekudaro, vacuum brazing zvakare ine zvinotevera zvakaipa:

① Simbi iri nyore kunyungudika pasi pevacuum, saka haina kukodzera kushandisa vacuum brazing kune base simbi uye yekuzadza simbi yezvinhu zvinoputika.Kana zvichidikanwa kushandisa, inoenderana yakaoma maitiro matanho anogamuchirwa.

② Vacuum brazing inonzwa kune kushata kwepamusoro, mhando yegungano uye kushivirira kwakakodzera kwezvikamu zvakasungwa, uye inoda yakakwira theoretical level yenzvimbo yekushanda nevashandisi.

③ Vacuum midziyo yakaoma, ine hombe yenguva imwe chete yekudyara uye yakakwirira mari yekugadzirisa.

Saka, maitiro ekuita brazing process muvacuum furnace?Kana kupisa kuchiitwa muchoto chevacuum, weldment ichaiswa welded inoiswa muchoto (kana mumudziyo wekupisa), gonhi rechoto richavharwa (kana chivharo chemudziyo wekupisa chichavharwa), uye chisati chabviswa pamberi. kudziyisa.Tanga pombi yemagetsi kutanga, shandura vheji yekugezera mushure mekunge dhigirii yevacuum yasvika 1.35pa, vhara nzira yakananga pakati pemakinika pombi nechoto chekupisa, ita pombi yakabatana nechoto chekupisa kuburikidza nepombi yekuparadzira, vimba nepombi yemagetsi uye pombi yekuparadzira kushanda mukati menguva shoma, pomba choto chebrazing kusvika kune inodiwa vacuum degree, uye wobva watanga simba pakudziya.

Munguva yese yekuita tembiricha yekukwira nekudziya, iyo vacuum unit icharamba ichishanda kuchengetedza iyo vacuum dhigirii muchoto, kugadzirisa kubuda kwemhepo munzvimbo dzakasiyana dzevacuum system uye nechoto chinopisa, kuburitswa kwegasi uye chiutsi chinoshambadza pamhepo. rusvingo rwevira, chigadziriso uye weldment, volatilization yesimbi uye oxide, nezvimwewo, kuitira kuderedza mhepo yechokwadi.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 yekuzadza simbi 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 usati wapukuta kuchabatsira kuwana mhedzisiro iri nani mukukwirisa vacuum brazing.