Chithandizo cha kutentha Njira ya High Precision Steel Pipe

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Vacuum quenching vacuum quenching ng'anjo amagawidwa m'mitundu iwiri malinga ndi njira yozizira: kuzimitsa mafuta ndi kuzimitsa mpweya, ndipo amagawidwa m'chipinda chimodzi ndi mitundu iwiri ya chipinda malinga ndi chiwerengero cha masiteshoni.Ng'anjo ya 904 Mountain/Weidao ndi ya ng'anjo ya periodic operation.Mng'anjo zozimitsira mafuta a vacuum ndi zipinda ziwiri, zokhala ndi zinthu zotenthetsera zamagetsi zomwe zimayikidwa kuchipinda chakumbuyo ndi ma groove amafuta omwe ali pansi pa chipinda chakutsogolo.Chidutswacho chikatenthedwa ndi kutenthedwa, chimasunthira kuchipinda chakutsogolo.Pambuyo potseka chitseko chapakati, gasi wa inert amadzazidwa mu chipinda chakutsogolo pafupifupi 2.66% 26times;LO ~ 1.01% 26times;10 Pa (200-760mm mercury column), onjezerani mafuta.Kuzimitsa mafuta kungayambitse kuwonongeka kwa malo ogwirira ntchito.Chifukwa cha zochita zake zapamwamba, carburization yowonda kwambiri imatha kuchitika mothandizidwa ndi filimu yayifupi yamafuta otentha kwambiri.Kuonjezera apo, kumamatira kwa carbon wakuda ndi mafuta pamwamba sikungathandize kuchepetsa kutentha kwa kutentha.Kukula kwa ukadaulo wa vacuum quenching makamaka kwagona pakupanga ng'anjo zozimitsa gasi zomwe zimagwira ntchito bwino komanso malo amodzi.Ng'anjo yazipinda ziwiri zomwe tatchulazi zitha kugwiritsidwanso ntchito kuzimitsa gasi (kuzizira kwa ndege yapachipinda chakutsogolo), koma magwiridwe antchito amtundu wapawiri kumapangitsa kuti zikhale zovuta kutulutsa ng'anjo yochulukirapo, komanso ndikosavuta kuyambitsa ntchito. mapindikidwe kapena kusintha mawonekedwe a workpiece kuti awonjezere deformation yozimitsa panthawi yotentha kwambiri.Ng'anjo yozimitsa yokha yozimitsidwa ndi mpweya imaziziritsidwa ndi kuziziritsa kwa jeti m'chipinda chotenthetsera kutentha ndi kutchinjiriza kumalizidwa.Liwiro loziziritsa la kuziziritsa kwa mpweya silili lofulumira ngati la kuziziritsa kwa mafuta, komanso limakhala lotsika kusiyana ndi isotherm ndi kuzimitsidwa kwapadera kwa mchere wosungunula m'njira zachikhalidwe zozimitsa.Choncho, mosalekeza kuonjezera kuthamanga kwa kutsitsi kuzirala chipinda, kuonjezera otaya mlingo, ndi kugwiritsa ntchito mpweya inert helium ndi haidrojeni ndi Molar misa ang'onoang'ono kuposa nayitrogeni ndi argon ndi waukulu chitukuko vacuum quenching luso masiku ano.Chakumapeto kwa zaka za m'ma 1970, kupanikizika kwa kuziziritsa kwa nayitrogeni kunawonjezeka kuchokera ku (1-2)% 26times;Wonjezerani 10Pa mpaka (5-6)% 26times;10Pa, kupangitsa kuzirala kufupi ndi kuziziritsa kwamafuta pansi pazovuta zanthawi zonse.Pakatikati mwa zaka za m'ma 1980, kuzima kwa mpweya wochuluka kwambiri kunawonekera, pogwiritsa ntchito (10-20)% 26times;Helium ku 10Pa, yokhala ndi mphamvu yozizirira yofanana kapena yokwera pang'ono kuposa kuzimitsa mafuta, yalowa m'mafakitale.Kumayambiriro kwa zaka za m'ma 1990, 40% 26times inavomerezedwa;Mpweya wa 10Pa hydrogen, womwe uli pafupi ndi mphamvu yoziziritsa ya kuzimitsidwa kwa madzi, udakali m'mayambiriro ake.Maiko otukuka mafakitale apita patsogolo kwambiri (5-6)% 26times;10. Pa gasi kuzimitsidwa ndi gawo lalikulu, pamene ubale Nthunzi kuthamanga (mtengo wongoyerekeza) ndi kutentha kwa zitsulo zina opangidwa ku China akadali siteji ya ambiri pressurized quenching (2% 26times; 10Pa).

Zotsatira zake ndi vacuum carburization quenching process curve.Pambuyo potenthetsa kutentha kwa carburizing mu vacuum ndikuigwira kuti iyeretsedwe ndi kuyambitsa, mpweya wowonjezera wowonjezera wa carburizing (onani kutentha kwa mpweya wotentha) umayambitsidwa, ndipo kulowetsedwako kumachitika ndi mphamvu yoipa pafupifupi 1330Pa (10T0rr).Kenaka, mpweya umayimitsidwa (depressurized) kuti uwonongeke.The mwatsatanetsatane zitsulo chitoliro kuzimitsidwa pambuyo carburization utenga nthawi imodzi kuzimitsa njira, amene poyamba kudula mphamvu, amadutsa nayitrogeni kuti kuziziritsa workpiece kwa mfundo yovuta A, m'munsimu, kuchititsa kusintha gawo mkati, ndiyeno amasiya mpweya, akuyamba mpope. , ndikuwonjezera kutentha.