Agbagharamgbe 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 decomposition iji kwalite nnofega, dị ka n'ihi na tempering tempering bụ a na-abụghị nha nha nzukọ ka itule nke nzukọ na-arụkọ ọrụ na atomization nke usoro nke a dechara atomization na usoro a na-adabere n'otú a na-arụ ọrụ na itughari usoro na atomization. ọkụ okpomọkụ dị elu, ngwa ngwa mgbasa ngwa ngwa; Kama nke ahụ, na-abawanye nke tempering okpomọkụ, quenching Ọdịdị nke forgings ga-enwe 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, ibelata uka nta nke martensite na okpomọkụ na nke a ogbo, ọdịda naanị akụkụ nke supersaturated carbon atom, ya mere ọ ka bụ carbon na a - Fe supersaturated siri ike ngwọtaThe 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 decomposition mgbe okpomọkụ bilie ka 200-300, decomposition nke martensite nọgidere na-, ma na-achị mgbanwe bụ ihe fọdụrụ austenite decomposition nke fọdụrụ austenite decomposition bụ site mgbasawanye nke carbon atoms na-etolite a ele mmadụ anya n'ihu na mpaghara, na mgbe ahụ decomposed nke carbpha nhazi n'ime akụkụ, na-adọ decomposed nke carbpha. ike siri ike bainite adịghị agbada n'ụzọ doro anya na ọkwa a
(3)Nke atọ ogbo (250-400) carbide mgbanwe nke forging tempering dị na nke a okpomọkụ nso. N'ihi oke okpomọkụ, carbon atom diffusion ike dị ike karị, ikike mgbasawanye na-agbake atom ígwè kwa, martensite decompose mgbanwe nke mmiri ozuzo carbides na residual austenite decomposition ga-aghọ a dịtụ kwụsiri ike simenti na nkewa na mgbanwe nke carbides, mbelata nke martensite na carbon uka akụkụ, latticedite na-apụ n'anya, latticeterite na-apụ n'anya, nweta ferritic matrix nkesa n'ime obere granular ma ọ bụ lamellar cementite nke nzukọ, nzukọ a na-akpọ tempering ihu ọma kpochapụ a na-adọ austenite quenching nchekasị, isi ike, plasticity siri ike e mma.

(4)Nke anọ ogbo nke forging tempering (& GT; 400) toro carbide gbakọtara na recrystallization nke ferrite n'ihi tempering okpomọkụ dị elu nke ukwuu, carbon na ígwè atọm nwere ike ike nke proliferation, nke atọ na-adọ guzobe nke cementite flakes ga-anọgide na-spheroidizing na tolite na ihe karịrị 500-600, alpha na-eme ka morphoid na ihe karịrị 500-600. etolite polygon ọka nkesa na nzukọ dị ka a ferritic matrix granular carbides, otu a na-akpọ tempering sorbite tempered sorbite na ezi keukwu n'ibu Njirimara nke frasi na lattice distortion wepụ esịtidem nchegbu.

(site na 168 forging net)