Kev tsim cov hlau, los ntawm cov hlau ore mus rau cov khoom tiav, feem ntau muaj plaub theem: sintering, ironmaking, steelmaking, thiab dov. Hauv cov kab lus dhau los, peb tau tshawb nrhiav qhov tseem ceeb ntawm kev tsim steel kom meej. Tam sim no, peb yuav tsom mus rau cov txheej txheem steel dov, delving tob rau hauv cov txheej txheem ntau lawm los ntawm ingot mus rau cov khoom tiav. Raws li theem kawg ntawm kev tsim cov hlau nyob rau hauv niaj hnub steel mills, dov yog qhov tseem ceeb uas tsis tuaj yeem lees paub.
Txheej txheem cej luam ntawm Steel Rolling
Steel dov yog ib kauj ruam tseem ceeb hauv kev tsim steel. Nws hloov cov hlau ingots rau hauv qhov xav tau loj thiab cov duab los ntawm cov yas deformation ntawm rotating rollers. Cov txheej txheem steel dov yog cov txheej txheem tsim ua tib zoo uas suav nrog kev npaj billet, cua sov, dov, thiab ua tiav. Cov khoom uas xav tau yog ua tiav los ntawm kev hloov pauv ntawm cov rotating rollers.
Hlau dov yog lub siab- txheej txheem tsim los ntawm kev sib hloov cov chais kom hloov cov duab ntawm cov hlau ingot lossis billet. Cov txheej txheem tsim ua tib zoo no muaj ntau cov kauj ruam uas ua ke ua tiav cov txheej txheem steel dov.
Kev piav qhia ntxaws ntawm Cov Txheej Txheem Hlau Rolling
Kev npaj Bill thiab cua sov
Kev npaj daim nqi suav nrog kev kho saum npoo thiab kev kho cua sov. Cov cua kub muab qhov tsim nyog kub rau dov thiab yog ib kauj ruam tseem ceeb hauv cov txheej txheem kub dov. Qhov no yog thawj kauj ruam hauv kev tsim cov hlau dov thiab suav nrog kev tu qhov chaw tsis xws luag, tshem tawm cov nplai, thiab ua ntej-kub kho cov pob zeb. Cov cua kub tshwj xeeb yog qhov tseem ceeb hauv cov txheej txheem kub dov, vim nws muab cov kev ntsuas kub tsim nyog rau cov txheej txheem dov.
Rolling thiab Finishing ntawm Steel
Rolling yog lub hauv paus kauj ruam hauv steel dov ntau lawm. Ntawm no, lub billet yog deformed los ntawm dov, thiab cov txheej txheem no muaj kev txiav txim siab rau qhov zoo ntawm cov khoom kawg. Kev ua tiav yog cov kauj ruam kawg uas ua kom zoo kawg nkaus thiab suav nrog coiling, txias, thiab straightening. Cov khoom lag luam zoo yuav tsum muaj ntau yam, suav nrog cov duab geometric, qhov tseeb qhov tseeb, cov qauv sab hauv thiab cov khoom, thiab qhov chaw tiav. Raws li cov kauj ruam kawg hauv steel dov ntau lawm, nws yog lub luag haujlwm los xyuas kom meej cov khoom zoo kawg. Cov ntsiab lus ntawm cov txheej txheem tiav nws txawv nyob ntawm cov khoom tsim nyog, tab sis feem ntau suav nrog coiling, post- dov txias, straightening, kho cua sov zaum kawg, ntxuav nto, thiab pleev xim.
Hlau Rolling Txoj Kev
Kub Rolling thiab Txias Rolling
Kub dov yog ua nyob rau hauv high kub, thaum txias dov yog ua nyob rau hauv lub chav tsev kub. Qhov txawv yog nyob ntawm cov hlau recrystallization kub. Hlau ingots los yog billets nyuaj rau deform thiab txheej txheem ntawm chav tsev kub, yog li lawv tau rhuab mus rau ntawm 1100℃thiab 1250℃rau dov. Cov txheej txheem no hu ua kub dov. Rolling ua nyob rau hauv chav tsev kub yog feem ntau suav hais tias yog txias dov. Los ntawm kev xav metallurgical, qhov sib txawv ntawm qhov kub thiab txias dov yog nyob ntawm cov hlau qhov kub thiab txias recrystallization. Rolling hauv qab qhov ntsuas kub ntawm qhov ntsuas kub ntawm 450℃txog 600℃yog suav tias yog txias dov, thaum dov saum toj no qhov kub thiab txias yog suav tias yog kub dov.
Ntev thiab Hla - Rolling
Nyob rau hauv longitudinal dov, lub workpiece txav perpendicular mus rau yob axis; nyob rau hauv cross- dov, lub workpiece rotates txog lub centerline, parallel mus rau lub yob axis. Longitudinal dov, tseem hu ua longitudinal dov, yog hom kev dov feem ntau. Nyob rau hauv txoj kev no, cov khoom siv dov hla ntawm ob lub txee -rotating rolls, txav mus rau perpendicularly mus rau yob axis, nrog rau lub workpiece mus rau pem hauv ntej los ntawm qhov sib txawv ntawm lub ntsej muag yob. Hla - dov, ntawm qhov tod tes, suav nrog cov khoom ua haujlwm tig ntawm cov yob txog nws tus kheej qhov chaw nruab nrab, nrog rau qhov nruab nrab ntawm qhov sib npaug mus rau lub yob axis, thiab raug rau siab tsuas yog nyob rau hauv txoj kev transverse.
Rolling Process System
Rolling Deformation System
Lub dov deformation system suav nrog tag nrho cov deformation thiab nws qhov kev faib tawm ntawm ntau yam dov units. Lub steel seem deformation system yog reflected nyob rau hauv dhau tsim. Nws encompasses tag nrho cov deformation los ntawm raw khoom rau cov khoom tiav nyob rau hauv tej yam kev mob rolling, tus naj npawb ntawm dov kis, kev faib ntawm deformation ntawm ntau yam dov units, thiab txoj kev dov. Hauv kev tsim cov ntu steel, lub workpiece yog dov los ntawm kev hla dhau mus. Yog li ntawd, steel seem deformation system yog feem ntau xav txog hauv kev tsim dhau. Pass tsim encompasses ntau yam, nrog rau kev txiav txim hla, elongation coefficient faib, cross-section profile design, thiab yob pass tsim.
Rolling Temperature System
Qhov kub ntawm lub workpiece ntawm txhua theem yog teev. Niaj hnub rolling mills muaj cov cuab yeej los tswj qhov kub thiab txias. Qhov system no qhia txog qhov pib thiab xaus qhov kub ntawm lub workpiece thaum lub sij hawm dov txheej txheem. Cov rolling mills niaj hnub no feem ntau nruab nrog cov khoom siv xws li cov dej nruab nrab hauv nruab nrab kom tswj tau qhov kub thiab txias ntawm txhua theem. Thaum lub sij hawm steel seem dov, ob peb yam tseem ceeb yuav tsum tau nruj me ntsis tswj, nrog rau qhov pib dov kub, zaum kawg dov kub, deformation kub, pib txias txias, nruab nrab txias kub, txo lub txaj kub, thiab txo lub txaj txias.
Rolling Speed Control
Kev tswj cov kab nrawm ntawm cov yob hauv txhua qhov dhau los kom ntseeg tau tias cov hlau ntws sib npaug yog qhov tseem ceeb. Qhov no suav nrog cov kev cai tshwj xeeb rau cov kab nrawm ntawm cov yob hauv txhua qhov dhau los thiab ntawm ntau theem ntawm cov txheej txheem dov, tseem hu ua cov cai ceev. Ntau hom dov mills muaj lawv tus kheej cov cai ceev thiab cov cai. Nyob rau hauv ib tug nruam rolling zeb, tswj vaj huam sib luag hlau txaus tus nqi nyob rau hauv tag nrho cov sawv yog ib qho tseem ceeb, uas yog tiav los ntawm kev tswj thiab kho cov dov speeds ntawm txhua lub zeb.
Rolling Khoom
Classification ntawm Rolling Equipment
Cov cuab yeej siv tshuab hauv lub tshuab yob tuaj yeem muab faib ua lub tsheb ciav hlau loj thiab lwm yam khoom siv pabcuam raws li lawv txoj haujlwm. Rollers yog cov khoom tseem ceeb ntawm lub tsheb ciav hlau loj, thiab lawv hom sib txawv nyob ntawm lawv daim ntawv thov. Cov khoom tseem ceeb uas deforms cov hlau nyob rau hauv lub rotating rolls yog hu ua lub ntsiab lub tsheb ciav hlau ntawm lub dov zeb. Cov khoom tseem ceeb ntawm lub tsheb ciav hlau tseem ceeb muaj xws li lub ntsiab lub cev muaj zog, kis tau tus mob machinery, thiab dov mills. Lawv configuration sib txawv nyob ntawm seb lub zeb kev npaj, tsav txoj kev, thiab kis mechanism. Piv txwv li, lub tshuab dov feem ntau muaj cov ncej, yob, yob hloov khoom siv, yob ntsuas cov cuab yeej, thiab yob bearings.
Rolls, raws li cov khoom tseem ceeb ntawm lub tsheb ciav hlau tseem ceeb, tuaj yeem muab faib ua peb hom: phaj thiab sawb zeb yob, seem zeb yob, thiab raj zeb yob, nyob ntawm seb hom zeb. Phaj thiab sawb zeb yob feem ntau yog cylindrical. Kub- Rolled strip rolls muaj me ntsis concave chim kom zoo zoo txawm tias thermal expansion, thaum txias -rolled strip rolls muaj ib tug me ntsis convex chim kom zoo zoo nyob rau hauv khoov rog. Tshooj zeb rolls yog grooved, thiab lawv layout yuav tsum tau ceev faj tsim raws li cov txheej txheem dov rau seem steel. Rollers siv hauv raj dov yog tsim los ntawm lub hauv paus ntsiab lus ntawm tus ntoo khaub lig- dov thiab tej zaum yuav yog conical, nruas-puab, los yog disc-puab.
