Shanduko mu microstructure uye zvinhu zvekuregerera panguva yekudzora

Kukanganwiramushure mekudzima, martensite uye yakachengetwa austenite isingagadzikike, ivo vane gadziriro yekushanduka sangano shanduko yekudzikama, senge supersaturated kabhoni mune martensite yekupedzisa zvakasara austenite kuora kuitira kusimudzira shanduko, sekunge tempering tempering isiri-yakaenzana sangano. kuyananisa mashandiro esangano, maitiro aya anoenderana nekutama kutama uye kusanganisa kweiyo mvumo pamwe chete nekupedzwa kwako kupisa kwemoto kuri pamusoro, nekukurumidza kusanganisa velocity; Kusiyana neizvozvo, nekuwedzera kwekupisa kupisa, iyo queching chimiro chekuregerera vanochinja zvinotevedzana. Zvinoenderana nemamiriro ezvinhu ekushandurwa kwema micostosition, tempering inowanzo gadzaniswa muzvikamu zvina: martensite decomposition, inosara austenite kuora, carbide kuunganidzwa kukura uye ferrite kudzokorodza.
Chikamu chekutanga (200)
(1) nokuchengetedza tempering martensite kuora pasi pe80 tembiricha yekudziya, kudzima simbi pasina Ming S shanduko yesangano, kuitika kwebhabhoni mune martensite chete chikamu, uye hapana anotanga kuputsa mukati me80-200 tempering, martensite inotanga kuora, kururamisa zvakanyanya kusanzwisisika carbides, kuderedza kuwanda kwenzvimbo martensite pakukanganwira kabhoni mune ino nhanho, nekuda kwekushisa kwakadzikira, martensitic mhepo chete chikamu che supersaturated kabhoni maatomu, saka ichiri kabhoni mune - Fe supersaturated solid solution kunyungudika kwemaitiro akanaka kwazvo ebarbide yakagoverwa mune matrix ye martensite. Chimiro chakasanganiswa chakaderera satellite Martensite uye yakanaka kwazvo carbide inonzi yakaomeswa Martensite.

1

(2) inowedzera tempering muchikamu chechipiri (200-300), iyo yakasara austenite kuora kana tembiricha yakakwira kusvika 200-300, kuora kwemartensite kwakaenderera mberi, asi shanduko huru ndeyekusara kwekusagadzika kwekuora kwezosara austenite. Kuwedzeredzwa kweatomu kabhoni kuti iite nzvimbo ine chikamu, uyezve yakatemwa kuita alpha chikamu uye musanganiswa we carbide organisation, iko kuumbwa kweasina kusimba simbi haisi pachena kuderera panguva ino
(3) Chikamu chechitatu (250-400) carbide shanduko. ofging tempering iri mune ino tembiricha huwandu. Nekuda kwekupisa kwakanyanya, Carbon atomu infusion kugona kwakasimba, iyo infusion inokwanisa kudzosera iron maatomu zvakare, martensite kuora shanduko yeiyo precipitation carbides uye yakasara austenite kuora kuchashandurwa kuva yakagadzikana cementite nekuparadzanisa uye shanduko yemakaradhi, kuderera. ye martensite mu kabhoni misa chidimbu, martensite lattice kukanganisika kunyangarika, martensitic shanduko yeiyo ferrite, wana ferritic matrix kugoverwa mukati mechidiki granular kana lamellar cementite yesangano, sangano rakadaidzwa kuti tempering rakazobvisa chikamu ichi austenite kupedzisa kusagadzikana, kuoma, plastikiity tnessness yakagadziriswa.

1

(4) Chikamu chechina chekusimbisa tempering (& GT; 400) yakakurira carbide yakaunganidzwa pamwe nekudzokororwazve kweiyo ferrite nekuda kwekudziya tembiricha yakanyanya kwazvo, kabhoni nesimbi maatomu ane kugona kwakasimba kwekuwedzera, chikamu chechitatu kuumbwa kwe cementite flakes ichaenderera mberi. spheroidizing uye akakurira mune anopfuura 500-600, alpha kudzokorodza kunoitika zvishoma nezvishoma, kurasikirwa ferrite morphology yeiyo yepakutanga iplat dhiza kana pepa, uye kugadzira polygon zviyo kugovera pane iyo sangano seyakakora matrix granular carbides, boka rakanzi tempering sorbite rakatswa sorbite ne yakanaka yakakwana macomment zvinhu zvechikamu uye latti inokanganisa inobvisa kushushikana kwemukati.

(From 168 forging net 8


Nguva yekutumira: Aug-05-2020

  • Previous:
  • Next:

  • WhatsApp Online Chat!