Mgbanwe microstructure na akụrụngwa nke forgings n'oge tempia

Oge ngbagharamgbe emesasịrị, martensite ma jigide austenite bụ ihe akwụghị chịm, ha nwere nzukọ nzukọ mgbanwe na-agbanwe ka udo, dị ka carbon na-aga n’ihu na martensite iji kpalite mbibi mbibi iji kwalite ngbanwe, dị ka maka iwe iwe ọkụ bụ nzukọ na-akwadoghị. imezi usoro nke nzukọ a, usoro a dabere na ịkwaga atom na ngbasa nke ikike a ọnụ zuru oke ọkụ gị dị elu, ngwa ngwa osisa ọsọ; Kama nke a, na mmụba nke tempering temprechọ, usoro a ga - echighari. na -aga usoro mgbanwe. Dabere na ọnọdụ nke mgbanwe microstructure, tempering na-ekewa n'ime nkebi anọ: martensite decomposition, nsị anụ austenite, nsị carbide na ferrite recrystallization.
The akpa ogbo (200)
(1) ibe ya bụrụ tempering martensite amalite irekasị n'okpuru 80 okpomọkụ tempering, quenching ígwè enweghị Ming S nzukọ mgbanwe, omume nke carbon na martensite naanị ele mmadụ anya n'ihu, ma ọ dighi-amalite imebi ala na 80-200 tempering, martensite amalite imebi, kpachara anya ụdị aghụghọ dị ala, belata oke nke martensite na mgbanye carbon na ogbo a, n'ihi oke ikuku na-ekpo ọkụ, ọdịda martensitic naanị akụkụ nke carbon atom na-ekpo ọkụ, yabụ ọ ka bụ carbon a ọdịda nke ezigbo carbide edo edo na-ekesa na matriks nke martensite. A na-akpọ agwakọta agwakọta nke Martensite dị ala na ezigbo carbide.

1

(2) ịkpa oke iwe na ọkwa nke abụọ (200-300), nsị nke mkpụkọ ihu mgbe ọnụọgụ wee ruo 200-300, mbibi nke martensite gara n'ihu, mana mgbanwe kachasị bụ nsị nke mkpochapu nke nsị mkpochasị ihe site na mbibi ahụ Mgbasa carbon atom na-etolite mpaghara akụkụ, wee jupụta n'ime usoro Alfa na ngwakọta nke nzukọ carbide, ya bụ, nguzobe ihe siri ike nke bainite apụtachaghị na ọkwa a
(3) ogbo nke atọ (250-400) mgbanwe carbide nke iwe iwe di otutu ebe a. N'ihi oke okpomọkụ, carbon carbon atom diffusion ikike siri ike, ikike mgbasa weghachite iron atoms nwekwara, martensite decompose Transition of prebure carbides and resinual austenite decomposition ga-abụ ihe kwụsiri ike ciment na nkewa na mgbanwe nke carbides, mbelata nke martensite na carbon carbon fraction, martensite lattice distortion na-apụ, mgbanwe martensitic maka ferrite, nweta ferritic matriks nkesa n'ime obere granular ma ọ bụ lamellar cementite nke nzukọ ahụ, nzukọ a kpọrọ tempering tụpụrụ oge a austenite quenching stress, hardness, plasticity solidness was beented

1

(4) Agba nke anọ nke iwe iwe (& GT; 400) toro carbide gbakọtara na recrystallization nke ferrite n'ihi oke ikuku na-ekpo ọkụ nke ukwuu, carbon na iron atom nwere ikike nke ịba ụba, usoro nke atọ nke cimite flakes ga-aga n'ihu spheroidizing ma tolite na ihe karịrị 500-600, alfa recrystallization na-eme nke nta nke nta, hapụ ferrite morphology nke mpempe efere mbụ ma ọ bụ mpempe akwụkwọ, wee mepụta nkesa polygon na nzukọ ahụ dị ka matriks granular carbides, otu a na-akpọ tempering sorbite tembite tembite with ezigbo ihe njiri mara usoro nke usoro na lattice distortion na-ewepụ nrụgide nke ime.

Sitere na 168 forging net)


Oge nzipu ozi: Ọgọst-05-2020

  • Previous:
  • Next:

  • WhatsApp Online Chat!