Yuav txhais li cas Kub Rolling

Kub dov yog txheej txheem hlau ua haujlwm nyob rau hauv uas cov hlau yog rhuab saum toj no lub recrystallization kub kom plastically deform nws nyob rau hauv kev ua hauj lwm los yog dov lub lag luam.

Cov txheej txheem no yog siv los tsim cov duab nrog qhov xav tau geometrical qhov ntev thiab cov khoom siv thaum tuav tib lub ntim ntawm cov hlau. Cov hlau kub yog dhau ntawm ob lub yob kom flatten nws, lengthen nws, txo qhov chaw hla ntu thiab tau txais ib qho tuab tuab. Kub-dov hlau yog cov khoom siv ntau tshaj plaws ntawm cov txheej txheem kub dov, thiab siv dav hauv kev lag luam hlau xws li cov khoom kawg lossis cov khoom siv raw rau kev ua haujlwm tom ntej.

Cov txheej txheem tsis yog thawj zaug ntawm cov hlau muaj cov kab loj loj loj hlob nyob rau hauv cov kev taw qhia ntawm solidification. Qhov no feem ntau yog nkig nrog cov ciam teb tsis muaj zog thiab tej zaum yuav muaj qhov tsis xws luag xws li cov kab noj hniav shrinkage, porosity los ntawm gases, thiab cov khoom txawv teb chaws xws li hlau oxides. Kub dov rhuav tshem cov qauv nplej thiab rhuav tshem cov ciam teb, ua rau muaj kev tsim cov qauv tshiab nrog cov ciam teb muaj zog muaj cov qauv zoo li qub.

Lub dov ntawm cov hlau saum toj no qhov kub ntawm recrystallisation yog hu ua kub dov. Qhov kub ntawm cov nplej tshiab tsim nyob rau hauv cov hlau yog hu ua recrystallisation kub. Qhov kub no yuav tsum tsis txhob siab dhau; txwv tsis pub cov hlau yuav hlawv thiab ua tsis zoo rau kev siv.

Kub dov seamless steel yeeb nkab ntau lawm txheej txheem

Kub dov seamless steel yeeb nkab feem ntau yog tsim los ntawm kev siv lub tshuab dov tsis siv neeg. Tom qab kev tshuaj xyuas thiab tshem tawm cov teeb meem ntawm qhov chaw, cov khoom siv lub raj khoob yog txiav rau hauv qhov ntev ntev, nyob rau ntawm lub ntsej muag kawg ntawm lub perforated kawg ntawm lub raj dawb paug, ces xa mus rau lub qhov cub cua sov rau cua sov, thiab perforated ntawm lub tshuab xuas nrig ntaus.

Thaum lub sij hawm tas mus li kev sib hloov thiab kev nce qib ntawm perforation nyob rau tib lub sij hawm, nyob rau hauv qhov kev txiav txim ntawm yob thiab ntsaws, ib kab noj hniav yog maj mam tsim nyob rau hauv lub raj dawb paug, uas yog hu ua ib tug capillary raj. Thiab ces xa mus rau qhov tsis siv neeg dov zeb mus txuas ntxiv dov. Thaum kawg, phab ntsa tuab ntawm tag nrho lub tshuab yog nruab nrab, thiab txoj kab uas hla yog sizing los ntawm lub tshuab sizing kom tau raws li cov kev cai tshwj xeeb. Nws yog ib txoj hauv kev zoo heev los tsim cov kav dej kub-dov seamless steel kav nrog txuas txuas txuas txuas mills.

Kub dov seamless steel yeeb nkab ntau lawm txheej txheem Kub dov seamless steel yeeb nkab yog feem ntau tsim los ntawm tsis siv neeg dov mills. Tom qab kev tshuaj xyuas thiab tshem tawm cov teeb meem ntawm qhov chaw, cov khoom siv lub raj khoob yog txiav rau hauv qhov ntev ntev, nyob rau ntawm lub ntsej muag kawg ntawm lub perforated kawg ntawm lub raj dawb paug, ces xa mus rau lub qhov cub cua sov rau cua sov, thiab perforated ntawm lub tshuab xuas nrig ntaus.

Thaum lub sij hawm tas mus li kev sib hloov thiab kev nce qib ntawm perforation nyob rau tib lub sij hawm, nyob rau hauv qhov kev txiav txim ntawm yob thiab ntsaws, ib kab noj hniav yog maj mam tsim nyob rau hauv lub raj dawb paug, uas yog hu ua ib tug capillary raj. Thiab ces xa mus rau qhov tsis siv neeg dov zeb mus txuas ntxiv dov. Thaum kawg, phab ntsa tuab ntawm tag nrho lub tshuab yog nruab nrab, thiab txoj kab uas hla yog sizing los ntawm lub tshuab sizing kom tau raws li cov kev cai tshwj xeeb. Nws yog ib txoj hauv kev zoo heev los tsim cov kav dej kub-dov seamless steel kav nrog txuas txuas txuas txuas mills.

Kub dov yog txheeb ze rau txias dov. Txias dov yog dov hauv qab qhov kub ntawm recrystallization, thaum kub dov yog dov saum toj no lub recrystallization kub.

Qhov zoo ntawm kub dov

Nws tuaj yeem rhuav tshem cov qauv casting ntawm lub ingot, kho cov nplej ntawm cov hlau, thiab tshem tawm qhov tsis xws ntawm microstructure, kom cov qauv hlau yog ntom thiab cov khoom siv kho kom zoo tuaj. Qhov kev txhim kho no feem ntau yog raws li cov kev taw qhia dov, kom cov hlau tsis muaj isotropic rau qee yam; cov npuas, tawg thiab porosity tsim thaum lub sij hawm casting kuj yuav welded nyob rau hauv qhov kev txiav txim ntawm kub thiab siab.

Disadvantages ntawm kub dov

Tom qab kub dov, cov non-metallic inclusions (tsuas yog sulfides thiab oxides, nrog rau silicates) nyob rau hauv cov hlau yog nias rau hauv nyias nyias, thiab qhov tshwm sim ntawm delamination (interlayer) tshwm sim. Delamination zoo heev deteriorates lub tensile zog ntawm cov hlau los ntawm lub thickness, thiab muaj peev xwm rau interlaminar tearing raws li cov weld shrinks. Lub cheeb tsam induced los ntawm lub shrinkage ntawm lub weld feem ntau ncav cuag ob peb lub sij hawm lub yield point strain, uas yog ntau npaum li cas loj tshaj lub strain induced los ntawm lub load;

Residual stress vim tsis txias txias. Residual stress yog qhov kev ntxhov siab ntawm tus kheej-theem equilibrium uas tsis muaj kev quab yuam sab nraud. Kub dov seem steel ntawm ntau seem muaj xws li residual stress. Feem ntau, qhov loj dua qhov loj ntawm seem steel, qhov ntau dua qhov seem ntawm qhov kev ntxhov siab. Txawm hais tias qhov seem ntawm kev ntxhov siab yog qhov sib npaug ntawm tus kheej, nws tseem muaj qee yam cuam tshuam rau kev ua haujlwm ntawm cov tswv cuab steel nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam. Piv txwv li, nws yuav muaj kev cuam tshuam tsis zoo rau deformation, stability, thiab qaug zog tiv thaiv.

Cov khoom kub-kuav los tiag steel yog qhov nyuaj rau kev tswj ntawm cov thickness thiab sab dav. Peb paub txog thermal expansion thiab txias contraction. Vim hais tias txawm tias qhov ntev thiab tuab yog raws li tus qauv thaum kub dov thaum pib, tseem yuav muaj qhov txawv tsis zoo tom qab txias. Qhov dav ntawm sab dav ntawm qhov tsis zoo sib txawv, qhov tuab tuab, qhov pom tseeb dua qhov kev ua tau zoo. Yog li ntawd, rau cov hlau loj, qhov dav, tuab, qhov ntev, lub kaum sab xis, thiab ntug ntawm cov hlau tsis tuaj yeem yog qhov tseeb.