Ukucisha, okubizwa nangokuthi ukuqina kuyinqubo yokushisa bese kuba ukupholisa kwensimbi (noma enye ingxubevange) ngesivinini esikhulu ukuthi kunokwanda okukhulu kokuqina, noma ngaphezulu noma kuyo yonke indawo.Endabeni ye-vacuum Quenching, le nqubo yenziwa kuma-vacuum furnaces lapho izinga lokushisa elifinyelela ku-1,300°C lingafinyelelwa.Izindlela zokucisha zizohluka ngokuphathelene nezinto ezilashwayo kodwa ukucisha igesi kusetshenziswa i-nitrogen kuvame kakhulu.
Ukucisha igesi ye-Vacuum:
Ngesikhathi sokucisha igesi ye-vacuum, okokusebenza kuyashiswa lapho ungekho umoya-mpilo ngokuguquguquka phakathi kwegesi ye-inert (N₂) kanye / noma imisebe yokushisa ngaphansi kwengcindezi.Insimbi iqiniswa ngokugeleza kwe-nitrogen, lapho izinga lokupholisa linganqunywa ngokukhetha ukucindezela okweqile.Kuye ngokuthi i-workpiece shape kungenzeka futhi ukhethe isiqondiso nesikhathi sokushaywa kwe-nitrogen.Ukulungiswa kwesikhathi nokulawulwa kwezinga lokushisa kwensimbi kwenziwa ngesikhathi senqubo ngokusetshenziswa kwama-thermocouples omshayeli angabekwa endaweni yokusebenza ekamelweni lokushisa.Insimbi ephathwa ukushisa esithandweni sevacuum ithola izici ezishiwo zamandla nobulukhuni kuso sonke isigaba esiphambanayo, ngaphandle kokususwa kwe-carburization.Okusanhlamvu kwe-Austenitic kulungile futhi kuhambisana nezindinganiso zamazwe ngamazwe.
Empeleni wonke ama-alloys ensimbi athakazelisa ngokobuchwepheshe, njengezinsimbi zasentwasahlobo, izinsimbi ezisebenza ngokubandayo, izinsimbi ezicishiwe neziqinile, izinsimbi ezivikela ukushayisana, izinsimbi ezisebenza ngokushisayo nezinsimbi zamathuluzi, kanye nenani elikhulu lezinsimbi ezingenasici ne-cast. -ama-iron alloys, angaqiniswa ngale ndlela.
Ukucisha Amafutha eVacuum
I-Vacuum Oil quenching ipholisa izinto ezishisiwe ngamafutha we-Vacuum. Njengoba ukudluliswa kwenkokhiso kwenzeka ngaphansi kwesivikelo se-vacuum noma i-inert-gas ngemva kokuba sigeze sihlanze isithando somlilo, ingxenye engaphezulu ihlezi ivikelekile kuze kube yilapho icwiliswa ngokuphelele emafutheni.Ukuvikelwa kwendawo kufana kakhulu noma ngabe ukucisha uwoyela noma igesi.
Inzuzo enkulu uma iqhathaniswa nezixazululo ezivamile zokucisha uwoyela osemkhathini ukulawula okunembayo kwemingcele yokupholisa.Ngesithando somlilo se-vacuum, kungenzeka ukuguqula imingcele evamile yokucisha - izinga lokushisa nokuyaluza - futhi ulungise nokucindezela ngaphezu kwethangi lokucisha.
Ukushintsha ingcindezi ngaphezu kwethangi kuzodala umehluko ekucindezelweni ngaphakathi kwendawo yokugezela kawoyela, okushintsha ijika elisebenza kahle lokupholisa uwoyela elichazwe kungcindezi yomoya.Ngempela, indawo yokubilisa iyisigaba lapho isivinini sokupholisa siphezulu kakhulu.Ukushintsha kwengcindezi kawoyela kuzoshintsha ukuhwamuka kwayo ngenxa yokushisa komthwalo.
Ukwehliswa kokucindezela kuzokwenza kusebenze izenzakalo ze-vaporization, eziqala isigaba sokubilisa.Lokhu kuzonyusa ukusebenza kahle kokupholisa koketshezi lokucisha futhi kuthuthukise amandla okuqina uma kuqhathaniswa nesimo somoya.Kodwa-ke, ukukhiqizwa okukhulu kwe-steam kungabangela i-sheath phenomenon futhi kubangele ukuguga okungenzeka.
Ukwanda kwengcindezi emafutheni kuvimbela ukwakheka komhwamuko futhi kubambezele ukuhwamuka.I-sheath inamathela engxenyeni futhi iphole ngokufanayo kodwa kancane kakhulu.Ngakho-ke, ukucisha uwoyela ku-vacuum kufana kakhulu futhi kubangela ukuphazamiseka okuncane.
Vacuum amanzi quenching
Inqubo efana nokucisha uwoyela we-vacuum, Kuyisixazululo esifanelekile sokuqina kokushisa kokushisa kwe-aluminium, i-titanium noma ezinye izinto ezidinga ukupholiswa ngesivinini esanele.
Isikhathi sokuthumela: May-07-2022