Kusakwana annealing yeMetal Castings
Tsanangudzo:
Annealing isina kukwana is akupisa kurapa maitiro esimbi castings, izvo zvinosanganisira kudziyisa simbi kusvika patembiricha iri pakati peAc1 neAc3 (yesimbi yehypoeutectoid) kana Ac1 neAccm (yesimbi ye hypereutectoid), kuitonhodza painotonhora isingasviki 50 ℃/h mushure mekuibata kusvika tembiricha yadonha. iri pasi pe500 ℃ uye wozoibudisa muchoto kuti itonhodze mweya. Iyi nzira ine chinangwa chekuwana chimiro chiri pedyo nemamiriro ekuenzanisa.
Austenitization maitiro:
Sezvo kupisa kwekushisa kuri munharaunda yezvikamu zviviri, chimiro chesimbi hachina kuchinjwa zvachose kuva austenite. Chete chikamu chepearlite chinopinda shanduko yechikamu uye recrystallization, ichishandurwa kuita austenite, nepo morphology uye kugoverwa kweproeutectoid ferrite kana simenti inoramba isina kuchinjika.
Application:
Kusakwana annealing kunonyanya kushandiswa senzira yepretreatment isati yadzima hypereutectoid simbi, uye kushandiswa kwayo mu hypoeutectoid simbi kushoma.
Spheroidizing annealing yeMetal Castings
Tsanangudzo:
Spheroidizing annealing ndeye chaiyo kupisa kupisa maitiro ayo ane chinangwa chekugadzira carbides musimbi fomu spherical particles, nekudaro kuwana granular pearlite chimiro. Muchokwadi, imhando yekusakwana annealing.
Application:
Iyi nzira inonyanya kushandiswa eutectoid simbi, hypereutectoid simbi uyealloy tool simbi castings, nechinangwa chekudzikisa kuoma kwezvinhu, kuvandudza mashandiro ekucheka, kuve nechokwadi chechimiro chakafanana, kukwidziridza maitiro ekupisa kwekuita, uye kuisa hwaro hwakanaka hwehurongwa hwekudzima kunotevera.
Maitiro ekuita:
Iyo tembiricha yekudziya inoda kunyatsodzorwa, kazhinji yakakwira zvishoma pane tembiricha yeAc1 ne20 kusvika 30 ° C, uye nzira yekudziya yevira inogamuchirwa.
Nguva yekubata haifanirwe kuve yakarebesa, kazhinji inochengetwa pakati pe2 ne4 maawa.
Kune nzira dzakasiyana dzekutonhodza, asi kutonhora kwechoto kana kurapwa kwenguva refu isothermal panenge pa20 °C pazasi peAr1 inzira yakajairika.
Chinokosha che spheroidizing annealing ndechekuona kuti nhamba yakakwana yezvisina kunyunguduka zve carbide zvinochengetwa mu austenite, zvichiita kuti kugoverwa kusina kufanana kwekabhoni yekabhoni kukurudzira spheroidization ye carbides.
Kupisa pakupisa kwakanyanya kana kubata kwenguva yakareba kunokonzeresa kuwanda kwecarbides kunyungudika, kugadzira yunifomu austenite, kuderedza spheroidization core uye kukanganisa spheroidization effect.
Chimiro uye saizi yemasimende zvimedu zvinokanganiswa nehuwandu hwekutonhora kana isothermal tembiricha. Kukurumidza kutonhora kana kuderera isothermal tembiricha inowanzoitika kuumba flaky carbides, zvichikonzera kuwedzera kuoma.
Inowanzo shandiswa spheroidizing annealing maitiro:
Single spheroidizing annealing:
kudziyisa kusvika pa20-30 ℃ pamusoro peAc1, kutonhora zvishoma nezvishoma kusvika pasi pe600 ℃ mushure mekudziya, uyezve mweya uchitonhodza kubuda muchoto.
Isothermal spheroidizing annealing:
kudziyisa kusvika pa20-30 ℃ pamusoro peAc1, inokurumidza kutonhora kusvika pa20 ℃ pazasi peAr1 mushure mekudziya, uyezve kutonhora kusvika pazasi pe600 ℃ nechoto nemhepo ichitonhora kubuda muchoto. Iyi nzira inoshandiswa zvakanyanya.
Reciprocating spheroidizing annealing:
kudziyisa kune tembiricha yakakwira zvishoma pane Ac1 kakawanda, kutonhora kusvika kune tembiricha yakadzikira zvishoma pane Ar1 mushure mekudziya, uyezve kutonhora kwemhepo kusvika tembiricha yekamuri kuwana zvirinani spheroidizing maitiro. Iyo yakakodzera kune yakaoma-ku-spheroidize simbi castings, asi kushanda kwakaoma.
Nguva yekutumira: Jan-03-2025