Kub dov thiab txias dov yog ob txoj hauv kev tseem ceeb hauv kev ua cov hlau, txhua qhov nthuav tawm qhov sib txawv tseem ceeb hauv kev ua haujlwm kub, cov txheej txheem, thiab cov khoom ua rau cov khoom siv hauv kev lag luam.
Kub Rolling: Txhim kho Plasticity thiab Efficiency:
Kub dov feem ntau yog ua los ntawm qhov kub thiab txias thiab feem ntau yog siv los ua cov phaj tuab thiab cov qauv hlau. Txoj kev no txhim kho cov hlau plasticity, txo cov deformation tsis kam, txhim kho kev tsim khoom, txo tus nqi, thiab txhim kho kev ua haujlwm. Txawm li cas los xij, cov khoom kub dov tej zaum yuav muaj qhov ntxhib ntawm qhov chaw, thiab vim qhov shrinking thaum lub sij hawm txias, qhov precision ntawm qhov yuav raug cuam tshuam. Tsis tas li ntawd, kub dov ua rau muaj kev sib tw hauv kev tswj xyuas cov khoom siv kho tshuab ntawm cov khoom thiab yuav ua rau muaj kev sib koom ua ke ntawm cov hlau tsis muaj hlau, uas ua rau cov txheej txheem txheej txheej uas tuaj yeem cuam tshuam cov hlau ua haujlwm.
![Recrystallization during hot rolling (adapted from Figure 1.8 of [5]). | Download Scientific Diagram](https://www.researchgate.net/publication/323969640/figure/fig1/AS:665766785466368@1535742579861/Recrystallization-during-hot-rolling-adapted-from-8-of-5.png "info-1-1")
Cold Rolling: Precision thiab Mechanical Performance:
Txias dov, ua nyob rau hauv chav tsev kub, feem ntau yog ua hauj lwm raws li cov kauj ruam tom ntej rau cov khoom kub dov. Txias dov txhim kho cov khoom siv lub zog thiab qhov ntsuas qhov tseeb, ua rau cov khoom lag luam smoother. Txawm li cas los xij, txias dov tuaj yeem ua rau kev ua haujlwm nyuaj hauv cov khoom, ua rau txo qis kev ua haujlwm. Tsis tas li ntawd, cov khoom txias dov feem ntau pom muaj zog dua thiab hardness piv rau cov khoom kub dov, tab sis nrog qis toughness.
Kev Sib Piv Kev Ntsuas
- Formability thiab Mechanical Properties:
Kub dov pab txhawb kev tawg ntawm cov qauv casting, refining steel lis thiab txhim kho nws cov khoom siv kho tshuab. Ntawm qhov tod tes, txias dov ua tiav cov yas deformation tseem ceeb hauv cov hlau los ntawm kev ua haujlwm txias, yog li ua kom cov txiaj ntsig tau zoo. Txawm li cas los xij, cov txheej txheem txias-kuav los tiag steel feem ntau nthuav tawm cov ntaub ntawv qhib, qis torsional nruj, thiab inferior torsional tsis kam.
- Residual Stresses:
Residual stresses nyob rau hauv kub-kuav los tiag steel feem ntau tshwm sim los ntawm non-uniform txias, whereas nyob rau hauv txias-dov hlau, lawv muaj feem xyuam rau cov txheej txheem ua hauj lwm txias. Kev faib tawm ntawm cov kev ntxhov siab seem txawv txawv ntawm ob txoj hauv kev, nrog cov hlau kub-kuav los tiag uas nthuav tawm cov yeeb yaj kiab-hom faib thiab cov hlau txias-dov uas qhia txog kev faib khoom.
- Ntu Buckling:
Cold-dov hlau tso cai rau thaj tsam hauv cheeb tsam buckling, harnessing lub peev xwm load-bearing tom qab buckling tshwm sim. Nyob rau hauv sib piv, kub-kuav los tiag steel tsis tso cai rau hauv zos seem buckling.
Hauv kev xaus, kub dov thiab txias dov yog cov kev sib txawv nrog lawv tus kheej yam ntxwv. Qhov kev xaiv ntawm cov txheej txheem no nyob ntawm cov khoom yuav tsum tau ua thiab daim ntawv thov scenarios. Kub dov muaj kev txhim kho plasticity, kev tsim tau ntau dua, thiab cov nqi qis dua tab sis yuav ua rau muaj kev sib tw thiab cov nyom hauv kev tswj cov khoom siv tshuab. Txias dov muab qhov ntev, txhim kho cov khoom siv kho kom zoo, thiab cov npoo du tab sis tuaj yeem ua rau kev ua haujlwm hardening thiab txo toughness. Nkag siab txog qhov sib txawv thiab xaiv txoj kev tsim nyog ua kom pom kev ua haujlwm steel thiab ua tau raws li qhov xav tau cov khoom tshwj xeeb hauv ntau yam kev lag luam.
