Kugadzirira
Vacuum annealing inogona kushandiswa kune yepamusoro-mhando chitubu simbi, Tool simbi, chaiyo simbi pombi waya, Stainless simbi zvigadzirwa uye titanium alloy zvinhu kupenya annealing.Iyo yakadzikira tembiricha yekuvharisa, iyo yakakwirira iyo vacuum degree inodiwa.Kudzivirira kubuda kwechromium uye kumhanyisa kupisa conduction, inotakura gasi kupisa (insulation) nzira inowanzoshandiswa, uye kutarisisa kunofanirwa kubhadharwa pakushandisa argon pachinzvimbo chenitrogen yesimbi isina tsvina uye titanium alloys.
Process
Vacuum quenching vacuum quenching furnaces dzakakamurwa kuita mhando mbiri maererano nekutonhodza nzira: kudzima oiri uye kudzima gasi, uye yakakamurwa kuita imwe kamuri uye kaviri kamuri mhando zvichienderana nehuwandu hwezviteshi.Iyo 904 Gomo/Weidao choto ndeye periodic operation choto.Vacuum oiri yekudzimisa mavira imakamuri maviri, ane magetsi ekudziya zvinhu akaiswa mukamuri yekumashure uye magirofu emafuta ari pazasi pekamuri yekumberi.Mushure mokunge chidimbu chebasa chinopisa uye chakavharidzirwa, chinotamirwa muimba yepamberi.Mushure mekuvhara musuwo wepakati, inert gasi inozadzwa mukamuri yekumberi kusvika kunosvika 2.66% 26 nguva;LO ~ 1.01% 26times;10 Pa (200-760mm mercury column), wedzera mafuta.Kudzima oiri kunogona kukonzera kuparara kwepasi kwechigamba chebasa.Nekuda kwekuita kwayo kwepamusoro kwepamusoro, yakakosha yakaonda layer carburization inogona kuitika pasi pechiito chepfupi firimu remafuta ekupisa.Pamusoro pezvo, kunamatira kwekabhoni dema nemafuta pamusoro hakubatsiri kurerutsa maitiro ekupisa.Iko kuvandudzwa kwevacuum quenching tekinoroji inonyanya kuve mukugadzirwa kwegasi rakatonhodzwa kudzima mavira ane mashandiro akanaka uye chiteshi chimwe chete.Iyo yambotaurwa mbiri yekamuri yevira inogona zvakare kushandiswa kudzima gasi (yemhepo jet kutonhora mukamuri yekumberi), asi kushanda kweiyo mbiri chiteshi mhando kunoita kuti zviome kuburitsa huwandu hukuru hwekurodha muchoto, uye zvakare zviri nyore kukonzera chidimbu chebasa. deformation kana kushandura kutaridzika kweiyo workpiece kuti iwedzere kudzima deformation panguva yepamusoro-tembiricha kufamba.Imwe chiteshi mhepo-yakatonhodzwa quenching choto inotonhodzwa nejeti kutonhora mukamuri yekudziya mushure mekudziya uye kuvhara kwapera.Iko kumhanya kwekutonhodza kwekutonhodza kwemhepo hakuna kukurumidza sekuya kwekutonhodza kwemafuta, uye zvakare yakadzikira pane isotherm uye graded quenching yemunyu wakanyunguduka munzira dzechinyakare dzekudzima.Naizvozvo, kuramba uchiwedzera dzvinyiriro yekamuri yekupfapfaidza inotonhorera, kuwedzera kuyerera, uye kushandisa inert magasi helium nehydrogen ine Molar mass idiki pane nitrogen uye argon ndiyo huru yekuvandudzwa kwevacuum quenching tekinoroji nhasi.Mukupera kwema1970, kudzvinyirirwa kwenitrogen kutonhora kwakawedzerwa kubva (1-2)% 26 nguva;Wedzera 10Pa kusvika (5-6)% 26 nguva;10Pa, ichiita iyo yekutonhodza huwandu pedyo nekutonhora kwemafuta pasi pekumanikidzwa kwakajairwa.Pakati pemakore ekuma1980, kudzima gasi kwepamusoro-soro kwakaonekwa, uchishandisa (10-20)% 26 nguva;Helium pa10Pa, ine simba rekutonhodza rakaenzana kana kukwira zvishoma pane kudzima mafuta, yapinda muindasitiri yekudzidzira.Mukutanga kwema1990, 40% 26times yakagamuchirwa;Iyo 10Pa hydrogen gasi, iri padyo nekutonhodza kugona kwekudzima kwemvura, ichiri mumatanho ekutanga.Nyika dzakasimukira dzakabudirira kusvika pakumanikidzwa kwakanyanya (5-6)% 26 nguva;10. Pa gasi kudzima ndicho chikamu chikuru, nepo hukama pakati peVapor pressure (theoretical value) uye tembiricha yeimwe simbi inogadzirwa muChina ichiri padanho rekumanikidza kudzima (2% 26times; 10Pa).
Mhedzisiro ndeye vacuum carburization quenching process curve.Mushure mekupisa kune tembiricha yecarburizing muvacuum uye kuibata kuti icheneswe pamusoro uye activation, gasi rakatetepa rinowedzera carburizing (ona inodzorwa mamiriro ekupisa kupisa) inounzwa, uye kupinza kunoitwa nekumanikidza kwakashata kunosvika 1330Pa (10T0rr).Zvadaro, gasi rinomiswa (depressurized) nokuda kwekupararira.Iyo chaiyo simbi pombi inodzimwa mushure mekuita carburization inotora imwe-nguva yekudzima nzira, iyo inotanga kucheka simba, inopfuudza nitrogen kuti itonhodze workpiece kune yakakosha point A, pazasi, ichikonzera shanduko yemukati, yozomisa gasi, inotanga pombi. , uye inokwidza tembiricha.
Nguva yekutumira: Jun-20-2023