Forgingsmgbe quenching, martensite na retained austenite bụ ejighị n'aka, ha nwere a spontaneous nzukọ mgbanwe na-emekarị ka kwụsie ike, dị ka supersaturated carbon na martensite ka precipitate fọdụrụnụ austenite ire ere iji kwalite nnofega, dị ka maka tempering tempering bụ a na-abụghị nha nha nzukọ. iji itule nzukọ usoro, usoro a na-adabere na atomic Mbugharị na mgbasa nke ikike ọnụ gị dechara ọkụ okpomọkụ dị elu, ngwa ngwa mgbasa ike; ime usoro mgbanwe. Dị ka ọnọdụ nke mgbanwe microstructure si kwuo, a na-ekewa tempering n'ụzọ anọ: decomposition martensite, residual austenite decomposition, carbide accumulation growth and ferrite recrystallization.
Nkeji mbụ (200)
(1) ịgha ụghatempering martensite decompose n'okpuru 80 okpomọkụ tempering, quenching ígwè na-enweghị Ming S nzukọ mgbanwe, omume nke carbon na martensite naanị ele mmadụ anya n'ihu, na ọ dịghị amalite imebi na 80-200 tempering, martensite na-amalite decompose, ịkpali nnọọ aghụghọ carbides, belata uka akụkụ nke martensite na carbon forgings na nke a ogbo, n'ihi na ala tempering okpomọkụ, martensitic ọdịda naanị akụkụ nke supersaturated carbon atom, ya mere ọ ka bụ carbon na a - Fe supersaturated siri ike solutionThe ọdịda nke nnọọ mma carbide uniformly ekesa na matriks. nke martensite. Ngwakọta agwakọta nke saturation dị ala Martensite na ezigbo carbide ka a na-akpọ tempered Martensite.

(2)ịgha ụghatempering na nke abụọ ogbo (200-300), ihe fọdụrụ austenite ire ere mgbe okpomọkụ bilitere na 200-300, decomposition nke martensite gara n'ihu, ma na-achị mgbanwe bụ ihe fọdụrụ austenite decomposition nke fọdụrụ austenite decomposition bụ site na mgbasawanye nke carbon atoms. na-etolite a ele mmadụ anya n'ihu ebe, na mgbe ahụ decomposed n'ime alfa-adọ na ngwakọta nke carbide nzukọ, ya bụ guzobe bainite ígwè ekweghị ekwe bụ doro anya ibelata na a ogbo.
(3)Nke atọ ogbo (250-400) carbide mgbanwe nke forging tempering dị na nke a okpomọkụ nso. N'ihi okpomọkụ dị elu, ikike mgbasa carbon carbon atom na-esiwanye ike, ikike mgbasawanye iji nwetaghachi atom ígwè, martensite na-emebi mgbanwe nke carbide mmiri ozuzo na refud austenite decomposition ga-aghọ cimentite siri ike na nkewa na mgbanwe nke carbides, mbelata. nke martensite na carbon mass partition, martensite lattice distortion na-apụ n'anya, mgbanwe martensitic maka ferrite, nweta nkesa ferritic matrix n'ime obere granular ma ọ bụ lamellar cementite nke nzukọ, nzukọ a na-akpọ tempering na-ekpochapụ usoro a austenite quenching stress, hardness, plasticity hardness e mma mma.

(4)Nke anọ ogbo nke forging tempering (& GT; 400) toro carbide gbakọtara na recrystallization nke ferrite n'ihi tempering okpomọkụ dị nnọọ elu, carbon na ígwè atọm nwere ike ike nke proliferation, nke atọ na-adọ guzobe cementite flakes ga-anọgide na-spheroidizing na-eto eto. n'ihe karịrị 500-600, alfa recrystallization na-eme nwayọọ nwayọọ, hapụ morphology ferrite nke mpempe efere mbụ ma ọ bụ mpempe akwụkwọ, na-etolite nkesa ọka polygon na nzukọ dị ka ferritic matrix granular carbides, otu a na-akpọ tempering sorbite tempered sorbite nwere ezigbo igwe zuru oke. Njirimara nke oge na mgbagha lattice na-ewepụ nrụgide dị n'ime.

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