Ukulungiselela
I-vacuum annealing ingasetshenziselwa insimbi yasentwasahlobo yekhwalithi ephezulu, insimbi yeThuluzi, intambo yepayipi yensimbi enembayo, imikhiqizo yensimbi engagqwali kanye nezinto ze-titanium alloy ukuze kufakwe i-annealing ekhanyayo.Lapho izinga lokushisa le-anneal liphansi liphansi, i-vacuum degree iyadingeka.Ukuvimbela ukuhwamuka kwe-chromium nokusheshisa ukuqhutshwa kokushisa, indlela yokushisisa igesi yenkampani yenethiwekhi ngokuvamile isetshenziswa, futhi kufanele kuqashelwe ukusebenzisa i-argon esikhundleni se-nitrogen yensimbi engagqwali nama-alloys e-titanium.
Inqubo
I-vacuum quenching vacuum quenching furnaces ihlukaniswe yaba izinhlobo ezimbili ngokwezindlela zokupholisa: ukucisha uwoyela nokucisha igesi, futhi ihlukaniswe yaba yigumbi elilodwa nezinhlobo zamakamelo amabili ngokuya ngenani leziteshi.I-904 Mountain/Weidao furnace ingeyeziko lokusebenza ngezikhathi ezithile.Iziko lokucisha uwoyela we-vacuum angamakamelo aphindwe kabili, anezici zokushisa zikagesi ezifakwe ekamelweni elingemuva kanye nemigodi kawoyela etholakala ngaphansi kwegumbi elingaphambili.Ngemuva kokuthi ucezu lomsebenzi lushisiwe futhi lufakwe ngaphakathi, luthuthelwa ekamelweni elingaphambili.Ngemva kokuvala umnyango ophakathi, igesi ye-inert igcwaliswa ekamelweni elingaphambili cishe izikhathi ezingu-2.66% 26;LO~1.01% izikhathi ezingu-26;10 Pa (200-760mm ikholomu ye-mercury), engeza amafutha.Ukucisha uwoyela kungabangela kalula ukuwohloka kwendawo yokusebenza.Ngenxa yomsebenzi wayo ongaphezulu, i-carburization ebalulekile yongqimba oluncane oluncane ingenzeka ngaphansi kwesenzo sefilimu kawoyela esezingeni eliphezulu.Ngaphezu kwalokho, ukunamathela kwekhabhoni emnyama namafutha ebusweni akusizi ukwenza lula inqubo yokwelapha ukushisa.Ukuthuthukiswa kobuchwepheshe be-vacuum quenching ikakhulukazi kulele ekuthuthukisweni kweziko lokucisha igesi elipholile elisebenza kahle kakhulu kanye nesiteshi esisodwa.Lesi sithando somlilo esishiwo ngenhla singasetshenziselwa ukucisha igesi (ukupholisa indiza yomoya egumbini elingaphambili), kodwa ukusebenza kohlobo lwesiteshi esikabili kwenza kube nzima ukukhiqiza inani elikhulu lokulayishwa kwesithando somlilo, futhi kulula ukubangela ucezu lomsebenzi. deformation noma uguqule umumo we-workpiece ukuze kwandiswe ukuwohloka kokucisha ngesikhathi sokunyakaza kwezinga lokushisa eliphezulu.Isithando somlilo sesiteshi esisodwa esipholiswa ngomoya sipholiswa ngokupholisa i-jet egumbini lokufudumeza ngemva kokuqedwa kokushisa nokufakwa ngaphakathi.Isivinini sokupholisa sokupholisa komoya asisheshi njengesokupholisa uwoyela, futhi siphansi kune-isotherm kanye nokucishwa okulinganiselwe kukasawoti oncibilikisiwe ngezindlela zendabuko zokucisha.Ngakho-ke, ngokuqhubekayo ukwandisa ukucindezela kwegumbi lokupholisa isifutho, ukwandisa izinga lokugeleza, nokusebenzisa amagesi angenayo i-helium ne-hydrogen ene-Molar mass encane kune-nitrogen ne-argon yizona ezihamba phambili zokuthuthukiswa kobuchwepheshe bokucisha i-vacuum namuhla.Ngasekupheleni kwawo-1970, ingcindezi yokupholisa i-nitrogen yanda ukusuka ku-(1-2)% izikhathi ezingu-26;Khulisa i-10Pa ukuya ku-(5-6)% izikhathi ezingu-26;10Pa, okwenza umthamo wokupholisa usondele ekupholiseni uwoyela ngaphansi kwengcindezi evamile.Maphakathi nawo-1980, ukucisha igesi yomfutho ophakeme kakhulu kwavela, kusetshenziswa (10-20)% izikhathi ezingu-26;I-Helium ku-10Pa, enekhono lokupholisa elilingana noma elingaphezulu kancane kunokucisha uwoyela, ingene emisebenzini yezimboni.Ekuqaleni kwawo-1990, kwamukelwa ama-40% izikhathi ezingu-26;Igesi ye-hydrogen eyi-10Pa, eseduze namandla okupholisa okucisha amanzi, isesigabeni sayo sokuqala.Amazwe athuthukile ezimbonini adlulele kwingcindezi ephezulu (5-6)% izikhathi ezingama-26;10. I-pa gas quenching iyingxenye eyinhloko, kuyilapho ubudlelwano phakathi kwengcindezi ye-Vapor (ivelu ecatshangelwayo) kanye nezinga lokushisa kwezinye izinsimbi ezikhiqizwa eChina kusesesigabeni sokucisha okujwayelekile okucindezelwe (2% 26times; 10Pa).
Umphumela uba ijika lenqubo yokucisha i-vacuum carburization.Ngemuva kokushisisa izinga lokushisa le-carburizing ku-vacuum futhi uyibambe ukuze ihlanzeke futhi isebenze, kwethulwa igesi elincanyana le-carburizing elinothisayo (bheka ukulawulwa kokushisa komkhathi olawulwayo) futhi ukungeniswa kwenziwa ngengcindezi engemihle ecishe ibe ngu-1330Pa (10T0rr).Khona-ke, igesi iyamiswa (icindezelekile) ukuze isakazeke.Ipayipi lensimbi elinembile elicishiwe ngemva kokuba i-carburization isebenzisa indlela yokucisha ngesikhathi esisodwa, eqala ukunqamula amandla, idlulise i-nitrogen ukuze ipholise i-workpiece endaweni ebalulekile A, ngezansi, ibangele ukuguqulwa kwesigaba sangaphakathi, bese imisa igesi, iqala iphampu. , futhi inyusa izinga lokushisa.
Isikhathi sokuthumela: Jun-20-2023