Ukulungiselela
I-vacuum annealing ingasetyenziselwa umgangatho ophezulu wentsimbi yasentwasahlobo, insimbi yeSixhobo, ucingo lombhobho wentsimbi oluchanekileyo, iimveliso zensimbi engenasici kunye nemathiriyeli ye-titanium ye-alloy ekhanyayo.Okukhona usezantsi ubushushu be-annealing, kokukhona kufuneka iqondo le-vacuum ephezulu.Ukuthintela ukuvela komphunga kwechromium kunye nokukhawulezisa ukuhanjiswa kobushushu, indlela yokufudumeza igesi yomthuthi (i-insulation) isetyenziswa ngokubanzi, kwaye ingqalelo kufuneka ihlawulwe ekusebenziseni i-argon endaweni ye-nitrogen yensimbi engenasici kunye ne-titanium alloys.
Inkqubo
Vacuum quenching vacuum quenching furnaces zahlulwe zibe ziindidi ezimbini ngokweendlela zokupholisa: ukucima ioli kunye nokucima igesi, kwaye zahlulwe zibe yigumbi elinye kunye neentlobo zegumbi eliphindwe kabini ngokwenani lezitishi.I-904 Mountain/Weidao furnace yeyeziko lokusebenza ngamaxesha athile.Iziko lokucima ioyile ligumbi eliphindwe kabini, elinezinto zokufudumeza zombane ezifakwe kwigumbi elingasemva kunye neegrooves zeoyile ezibekwe ngezantsi kwegumbi elingaphambili.Emva kokuba umsebenzi ushushu kwaye ufakwe i-insulated, uhanjiswe kwigumbi elingaphambili.Emva kokuvala umnyango ophakathi, igesi engasebenziyo igcwaliswa kwigumbi elingaphambili ukuya malunga ne-2.66% ngamaxesha angama-26;LO ~ 1.01% 26 amaxesha;I-10 Pa (200-760mm ikholamu ye-mercury), yongeza ioli.Ukucinywa kwe-oyile kunokubangela ukuwohloka komphezulu womsebenzi.Ngenxa yomsebenzi wayo ophezulu womphezulu, i-carburization enqabileyo enqabileyo inokwenzeka phantsi kwesenzo sefilimu emfutshane yobushushu obuphezulu.Ukongezelela, ukunamathela kwekhabhoni emnyama kunye neoli phezu komhlaba akuncedi ukwenza lula inkqubo yonyango lokushisa.Uphuhliso lwetekhnoloji yokucima ivacuum ikakhulu ilele kuphuhliso lweziko lokucima igesi elipholileyo elinokusebenza okugqwesileyo kunye nesikhululo esinye.Isithando somlilo esichazwe ngasentla segumbi eliphindwe kabini sinokusetyenziselwa ukucima igesi (ukupholisa ijethi yomoya kwigumbi elingaphambili), kodwa ukusebenza kohlobo lwesikhululo esiphindwe kabini kwenza kube nzima ukuvelisa izixa ezikhulu zokulayishwa kweziko, kwaye kulula ukubangela isiqwenga somsebenzi. i-deformation okanye ukuguqula ukuqhelaniswa kwe-workpiece ukwandisa ukucima ukuguqulwa ngexesha lokunyakaza okuphezulu kobushushu.Isikhululo esisodwa sokucima isithando somlilo sipholiswa yijethi yokupholisa kwigumbi lokufudumeza emva kokuba ukufudumeza kunye nokugquma kugqityiwe.Isantya sokupholisa sokupholisa umoya asikhawulezi njengeso sokupholisa i-oyile, kwaye sikwangaphantsi kwe-isotherm kunye nokucinywa ngokwemigangatho yetyuwa enyibilikisiweyo kwiindlela zemveli zokucinywa.Ngoko ke, ngokuqhubekayo ukwandisa uxinzelelo lwegumbi lokupholisa lokutshiza, ukwandisa izinga lokuhamba, kunye nokusebenzisa iigesi ze-inert ze-helium kunye ne-hydrogen ene-Molar mass encinci kune-nitrogen kunye ne-argon zezona ziphambili zophuhliso lwetekhnoloji yokucima i-vacuum namhlanje.Ngasekupheleni kwe-1970, uxinzelelo lokupholisa i-nitrogen lonyuswe ukusuka kwi-(1-2)% ngamaxesha angama-26;Ukwandisa i-10Pa ukuya (5-6)% ngamaxesha angama-26;I-10Pa, ukwenza umthamo wokupholisa usondele ekupholiseni kweoli phantsi koxinzelelo oluqhelekileyo.Phakathi kwiminyaka yee-1980, ukucinywa kwegesi yoxinzelelo oluphezulu kakhulu kwavela, kusetyenziswa (10-20)% amaxesha angama-26;I-Helium kwi-10Pa, enegunya lokupholisa elilingana okanye elingaphezulu kancinci kunokucima ioli, ingene kwi-industrial practice.Ekuqaleni kweminyaka yoo-1990, 40% 26times yamkelwa;Irhasi ye-hydrogen ye-10Pa, ekufutshane nomthamo wokupholisa wokucinywa kwamanzi, isekwizigaba zayo zokuqala.Amazwe aphuhlileyo kwezoshishino aqhubele phambili kuxinzelelo oluphezulu (5-6)% 26 amaxesha;10. Pa ukucima irhasi inxalenye ephambili, lo gama ubudlelwane phakathi Uxinzelelo Umphunga (ixabiso ithiyori) kunye lobushushu ezinye zesinyithi eziveliswe China isekwinqanaba ucime uxinzelelo jikelele (2% 26 amaxesha; 10Pa).
Isiphumo sisivacuum carburization quenching process curve.Emva kokufudumeza ubushushu be-carburizing kwi-vacuum kwaye ibambe ukucocwa komphezulu kunye nokusebenza, igesi encinci yokutyebisa i-carburizing (jonga unyango lobushushu obulawulwayo) iyaziswa, kwaye ukungeniswa kuqhutywa kuxinzelelo olubi malunga ne-1330Pa (10T0rr).Emva koko, igesi imisiwe (i-depressurized) yokusabalalisa.Umbhobho wentsimbi ochanekileyo ucinywe emva kokuba i-carburization ithatha indlela yokucima ixesha elilodwa, eliqala ukunqumla amandla, lidlulisa i-nitrogen ukuze ipholise i-workpiece kwindawo ebalulekileyo A, ngezantsi, ibangele utshintsho lwesigaba sangaphakathi, kwaye emva koko imise igesi, iqala impompo. , kwaye inyusa ubushushu.
Ixesha lokuposa: Jun-20-2023