Grain size yog hais txog cov grain loj nyob rau hauv ib lub grain loj siv lead ua.Cov qoob loo loj tuaj yeem qhia tau los ntawm thaj chaw nruab nrab lossis nruab nrab txoj kab uas hla ntawm cov nplej.Cov qoob loo loj yog qhia los ntawm qib grain loj hauv kev tsim khoom.General grain loj loj, uas yog, lub finer qhov zoo.Raws li cov lus hauv qab no, kuv vam tias nws tuaj yeem pab koj kom nkag siab txog qhov loj ntawm cov forgings.Kuv ntseeg hais tias yog paub txog cov grain loj ntawm forgings, ces peb yuav tsum tsis txhob paub ntau npaum li cas ntawm grain loj ntawm forgings.
Cov yas deformation ntawm forgings lov cov ntxhib thawj dendritic crystals thiab muaj ib qho tseem ceeb ntawm cov nplej refinement.Ntawm qhov tod tes, muaj cov txheej txheem recrystallization thaum lub sij hawm yas deformation ntawm qhov kub thiab txias.Thaum kub kub yas deformation, lub grain loj ntawm lubforgingsTom qab recrystallization yog txiav txim los ntawm qhov kub thiab txias, deformation degree thiab ceev.Yog li ntawd, lub grain loj ntawmforgingstau los ntawm cov txheej txheem forging sib txawv.

Cov khoom tseem ceeb ntawm forgings nrog coarse nplej yog tias lawv cov plasticity thiab toughness tsawg dua li cov nplej zoo.Refining nplej los ntawm kev kho cua sov tsis yog tsuas yog siv zog thiab kim, tab sis kuj nyuaj heev thiab ua tsis tau rau qee cov hlau alloy.Yog li ntawd, qhov tsim nyogforgingcov txheej txheem ntawm qee qib steel yuav tsum tau ua haujlwm raws li daim duab recrystallization ntawm kev ua haujlwm kub.
Qhov siab dua qhov kub ntawm forging, qhov loj qhov loj ntawm cov forgings tom qab recrystallization.Yog li ntawd, qhov kawg forging kub yuav tsum tau txo kom deb li deb li sai tau los xyuas kom meej lub grain refinement nyob rau hauv lub mob uas lub forgings yuav tsis ua rau tsawg kub forging tawg.Txawm li cas los xij, nws yog qhov nyuaj heev rau forgings loj los xyuas kom meej qhov tsis tshua muaj qhov kawg forging kub hauv txhua qhov chaw ntawm tib lub forging.Qhov no tsuas yog ua tau nrog kev paub thiab kev txawj ntawm cov neeg ua haujlwm tswv.
Ntawm ib qhoforgingkub, muaj qhov tseem ceeb deformation degree ntau yam.Thaum lub deformation degree nyob rau hauv qhov ntau, lub recrystallized grain ntawm forgingsyog tus ntxhib.Yog li ntawd, lub degree ntawm deformation thaum lub sij hawm forging, tshwj xeeb tshaj yog nyob rau hauv lub xeem hluav taws, yuav tsum tau zam kom deb li deb li sai tau nyob rau hauv lub tseem ceeb degree ntawm deformation.
Cov nplej tsis sib xws yog hais txog qee qhov ntawm forging grain yog tshwj xeeb yog ntxhib, qee qhov me me.Qhov laj thawj tseem ceeb ntawm qhov tsis sib xws ntawm cov nplej yog qhov tsis sib xws ntawm cov pob zeb ua rau cov nplej tawg ua kom sib txawv, lossis qhov deformation degree ntawm cov cheeb tsam hauv cheeb tsam poob mus rau qhov tseem ceeb deformation cheeb tsam, los yog lub zos ua hauj lwm hardening ntawm superalloy, los yog lub zos. coarse grain loj thaum quenching thiab cua sov.Thaum tshav kub kub-resistant steels thiab superalloys yog tshwj xeeb tshaj yog rhiab rau grain inhomogeneity.Qhov loj me me ntawm cov nplej tsis sib xws yuav txo qis kev ua haujlwm ntev thiab qaug zog ntawm forgings.
Kab lus no tsuas yog qhia txog cov nplej loj ntawm forgings.Kuv vam tias nws yuav pab tau koj.