Dab tsi yog qhov txawv ntawm kub dov seamless steel yeeb nkab thiab txias dov seamless steel yeeb nkab?
Cold-rolled seamless steel kav feem ntau yog me me, thiab cov kav dej kub-dov seamless steel kav feem ntau loj txoj kab uas hla.Qhov precision ntawm txias dov seamless steel yeeb nkab yog siab dua li ntawm kub dov seamless steel yeeb nkab, thiab tus nqi kuj siab dua li ntawm kub dov seamless steel yeeb nkab.
Seamless steel kav yog muab faib ua kub dov (extruded) seamless steel kav thiab txias-draw (dov) seamless steel kav vim lawv txawv manufacturing txheej txheem.Cold drawn (dov) raj muab faib ua round raj thiab tshwj xeeb-shaped raj.
1) Cov kav dej kub dov seamless rau cov hom phiaj sib txawv tau muab faib ua cov kav dej zoo tib yam, cov kav dej qis thiab nruab nrab siab boiler steel kav, siab siab boiler steel kav, alloy steel kav, stainless hlau kav, roj av cracking kav, geological steel kav thiab lwm yam steel kav.Cold-dov (dial) seamless steel kav yog muab faib mus rau hauv nruab nrab steel siab boiler steel yeeb nkab, boiler steel yeeb nkab thiab steel yeeb nkab. s, roj tawg cov kav dej thiab lwm cov yeeb nkab steel, nrog rau cov pa roj carbon nyias-walled steel kav, alloy nyias-walled steel kav, thiab stainless hlau nyias-walled steel kav.Cov yeeb nkab steel, tshwj xeeb zoo li cov yeeb nkab steel.
2) Sab nraud ntawm cov kav dej kub dov seamless ntawm ntau qhov sib txawv yog feem ntau ntau dua 32mm, thiab phab ntsa thickness yog 2.5-75mm.Qhov txoj kab uas hla ntawm txias dov seamless yeeb nkab tuaj yeem ncav cuag 6mm, thiab phab ntsa thickness tuaj yeem ncav cuag 0.25mm.Cov kab uas hla ntawm cov phab ntsa nyias nyias tuaj yeem ncav cuag 5mm. kub dov.
3) Cov txheej txheem sib txawv 1. Txias-rolled forming steel tso cai rau hauv zos buckling ntawm seem, uas tuaj yeem siv tag nrho cov kabmob muaj peev xwm ntawm lub bar tom qab buckling;thaum kub-dov hlau tsis tso cai rau hauv zos buckling ntawm seem.
2. Yog vim li cas rau cov residual kev nyuaj siab ntawm kub-kuav los tiag steel thiab txias-kuav los tiag steel yog sib txawv, yog li qhov kev faib ntawm cov ntoo khaub lig-section kuj sib txawv heev.Qhov residual kev nyuaj siab faib ntawm txias-tsim nyias-walled steel seem yog nkhaus, thaum residual kev nyuaj siab faib ntawm kub dov los yog welded steel seem yog zaj duab xis-zoo li.
3. Lub free torsional rigidity ntawm kub-kuav los tiag steel yog siab tshaj ntawm cov txias-kuav los tiag steel, yog li cov torsional tsis kam ntawm kub-dov hlau yog zoo dua li cov txias-dov hlau.
4) Qhov zoo thiab qhov tsis zoo sib txawv ntawm cov kav dej txias-dov seamless xa mus rau cov ntawv hlau lossis steel strips uas tau ua tiav rau ntau hom hlau los ntawm kev kos duab txias, txias-khoov, thiab kos duab txias ntawm chav tsev kub.
Qhov zoo: Kev sib sau ceev ceev, qhov tso zis ntau dhau, thiab cov txheej txheem puas lawm, thiab tuaj yeem ua rau ntau hom ntawv sib dhos kom tau raws li qhov xav tau ntawm kev siv;txias dov tuaj yeem ua rau cov yas loj deformation ntawm cov hlau, yog li ua kom lub zog tawm los ntawm cov hlau taw tes.
Disadvantages: 1. Txawm hais tias tsis muaj thermoplastic compression thaum lub sij hawm tsim, tseem muaj kev ntxhov siab nyob rau hauv seem, uas yuav inevitably cuam tshuam rau tag nrho thiab hauv zos buckling yam ntxwv ntawm cov hlau;2. Lub caij txias-kuav los tiag steel feem ntau yog ib qho qhib, uas ua rau cov dawb torsional nruj ntawm seem qis..Nws yog ib qho yooj yim rau ntswj thaum khoov, yooj yim rau khoov thiab ntswj thaum nws yog compressed, thiab tsis zoo torsional kuj;3. Cov phab ntsa tuab ntawm cov hlau txias txias yog me me, thiab qhov sib txuas ntawm cov phaj tsis thickened, yog li lub peev xwm los dais hauv zos concentrated loads tsis muaj zog.
Cov kav dej kub-dov seamless yog txheeb ze rau cov kav dej txias-dov seamless.Cold-dov seamless kav yog dov hauv qab qhov kub ntawm recrystallization, thiab cov kav dej kub dov seamless yog dov saum toj no qhov kub ntawm recrystallization.
Qhov zoo: Nws tuaj yeem rhuav tshem cov qauv casting ntawm lub ingot, ua kom zoo dua cov nplej ntawm cov hlau, tshem tawm qhov tsis xws ntawm cov qauv, ua rau cov qauv hlau ntom ntom, thiab txhim kho cov khoom siv kho tshuab.Qhov kev txhim kho no feem ntau tshwm sim hauv cov kev taw qhia dov, kom cov hlau tsis muaj isotropic rau qee yam;cov npuas, tawg thiab looseness tsim thaum lub sij hawm casting txheej txheem kuj yuav welded ntawm qhov kub thiab txias.
Disadvantages: 1. Tom qab kub dov, cov non-metallic inclusions (feem ntau yog sulfides thiab oxides, thiab silicates) nyob rau hauv cov hlau yog nias rau hauv nyias nyias, thiab delamination (interlayer) tshwm sim.Delamination heev deteriorates lub tensile zog ntawm cov hlau nyob rau hauv lub thickness kev taw qhia, thiab interlaminar tearing shrinks nyob rau hauv lub zos feem ntau tshwm sim. es ob peb zaug ntawm yield point strain, uas yog ntau npaum li cas loj tshaj lub strain tshwm sim los ntawm lub load;
2. Residual stress los ntawm uneven txias txias.Residual kev nyuaj siab yog nyob rau hauv tus kheej-equilibrium kev nyuaj siab yam tsis muaj sab nraud quab yuam.Kub-dov seem ntawm ntau yam cross-sections muaj xws li residual stresses. Feem ntau, qhov loj dua seem ntawm cov steel profile, qhov ntau dua qhov residual stress.Txawm hais tias qhov seem kev nyuaj siab yog nws tus kheej-ntsuas, nws tseem muaj peev xwm ua tau raws li tus qauv ntawm cov steel profile. cuam tshuam rau deformation, stability thiab qaug zog kuj.
3. Cov khoom kub-kuav los tiag steel tsis yooj yim rau kev tswj ntawm thickness thiab sab dav.Peb paub txog thermal expansion thiab contraction.Vim thaum pib, txawm tias qhov ntev thiab thickness yog raws li tus qauv, yuav muaj ib tug tej yam tsis zoo sib txawv tom qab qhov kawg txias.Qhov loj qhov tsis zoo sib txawv, lub thickness ntawm lub thickness thiab qhov ntau pom tseeb qhov kev ua tau zoo.