Coiling kub cuam tshuam cov khoom ntawm lub sawb

Tom qab ua tiav dov lub sawb, cov dej txias hauv txheej los hloov cov coiling kub ntau yamα yog suppressed heev.Nyob rau hauv feem ntau eutectoid ferrite nucleation thiab kev loj hlob nyob rau hauv lub coiling kub, tom qab ua tiav ntawm tsis tshua muaj txias txias tej yam kev mob yuav suav hais tias zoo ib yam li isothermal transformation txheej txheem, yog li ntawd, cuam tshuam lub coiling kub ntawm lub microstructure thiab cov khoom ntawm steel to taub raws li qhov cuam tshuam ntawm kev hloov ntawm kub. .Yog li qhov cuam tshuam ntawm coiling kub ntawm microstructure thiab cov khoom ntawm steel yog qhov tseem ceeb heev.Thaum lub coiling kub yog siab, ntxhib ferrite nplej tsis zoo, uas yog tsawg heev vim qhov kev hloov nyob rau hauv lub degree ntawm supercooling.α, tsawg cov ntsiab lus nucleation, feem ntau ntawm cov qoob loo ntawm cov thawjγ nplej, qhov kev loj hlob tshaj li ferrite ceev vim.Thaum lub coiling kub yog tsawg,α nce tus naj npawb ntawm nucleation, kev loj hlob tshaj tawm slows ferrite, ferrite grain loj yuav me me, tab sis nyhav rau diffuse zoo pearlite.Nrog txo qis coiling kub ferrite grain refinement, tus naj npawb ntawm acicular ferrite maj mam nce, nce pearlite ntsiab lus, pearlite lamellar qhov sib nrug yog maj mam txo.Yog li, nrog qis coiling kub, lub zog Performance index yuav nce, thaum lub plasticity Performance index poob me ntsis, uas yog cov pa roj carbon thiab ferritic alloy ntsiab vim lubγ-α theem kev hloov ntawm qis kub tau txais thaum cov ntsiab lus ntawm exigencies siab.Thaum qhov kawg ntawm qhov txias txias yog tsawg dhau lawm, qhov sib piv ntawm cov txiaj ntsig tau txhim kho formability detrimental rau, vim tias ntau dhau theem thib ob, tshwj xeeb tshaj yog coarse bainite steel plasticity Performance index ntawm qhov tsis zoo.

Coiling kub tswj cuam tshuam rau microstructure

Metallurgical machinery khoom, coiling kub thiab tiav dov kub, raws li qhov cuam tshuam ntawm ib tug loj steel microstructure, yog ib tug ntawm cov determinants ntawm tiav steel ua, mechanical zog ntawm cov txheej txheem tseem ceeb tsis.Coiling kub tswj yog qhov tseem ceeb ntawm kev tsim cov kub-kuav los tiag strip steel dov tswj kev ua kom txias, thiab tswj kev txias tom qab dov lub ntsiab yam tseem ceeb cuam tshuam rau qhov zoo ntawm cov khoom yog qhov pib txias (txias pib kub yog qhov txias txias) thiab qhov kawg kub, txias. ceev thiab uniformity ntawm txias.Lub coiling kub yuav tsum qis dua 670℃, feem ntau 600 ~ 650℃.Nyob rau hauv qhov ntsuas kub no, metallurgical machinery steel microstructure tau ua tiav, tuaj yeem ua kom txias txias thiab qeeb qeeb kom txo cov kev ntxhov siab sab hauv ntawm cov sawb kuj tau txais txiaj ntsig.Coiling kub yog siab dhau lawm, nws yuav ua rau recrystallization thiab qeeb txias tom qab coiling tsim cov nqaij ntshiv thiab coarse grain carbides, ua rau deterioration ntawm txhua yam khoom thiab tiam ntawm tawv hlau tawv, yog li pickling nyuaj.Yog hais tias lub coiling kub yog tsawg heev, thaum lub winding nyuaj, thiab muaj cov residual kev nyuaj siab, yooj yim unwinding, cuam tshuam qhov zoo ntawm cov tiav strip;Ntawm qhov tod tes, qhov kub coiling tsis txaus los ua kom cov supersaturated carbonitrides nag lossis daus, cuam tshuam rau kev ua haujlwm dov.Yog li ntawd, coiling kub tswj los ntawm lub internal microstructure nyob rau hauv lub Scope ntawm cov hlau, yog lwm yam tseem ceeb tswj ntsuas Metallurgical Machinery sawb zoo.Ntau yam sib txawv thiab cov lus qhia tshwj xeeb ntawm cov sawb, nws lub taub hau dov qhov kub yog feem ntau 800℃, highly oriented silicon steel xov kub yog feem ntau 980℃, whereas nyob rau hauv ntau tshaj 100 m ntev steel tso zis rollers khiav lub sij hawm ntawm tsuas yog 5 mus rau 158 .Rau nyob rau hauv xws li ib tug luv luv lub sij hawm ntawm lub sij hawm kom txo tau cov sawb kub 200 ~ 350℃, hluav taws xob hluav taws xob ib leeg steel tso zis chais thiab cov menyuam cov cua sov rau cov txheej txheem cua txias tsis tuaj yeem ua tau, cov khoom siv hluav taws xob yuav tsum tau teeb tsa qhov ntev ntawm kev ua haujlwm siab dej txias txhais tau tias rau lub sawb, yuam kom txias ntawm cov dej saum npoo av, thiab tswj kom raug. tus nqi ntawm cov dej kom tau raws li qhov yuav tsum tau muaj ntawm coiling kub.Kev siv tshwj xeeb coiling kub tswj yog raws li metallurgical machinery ntsig txog cov yam ntxwv sib txawv ntawm cov sawb (khoom siv, qhov loj), thiab lub xeev sib txawv ntawm tib lub strip point (kub, ceev), ntws los ntawm qhov ntev ntawm txheej txias (ie, qhib cua txias. Tus naj npawb ntawm header) ntawm qhov kev hloov pauv hloov pauv ntawm tag nrho qhov ntev ntawm cov strips mus rau ib qho kev taw qhia los ntawm qhov siab precision Qian kawg dov kub mus rau qhov kub ntawm qhov cua txias ceev yuav tsum tau.