Raws li txoj kev tsim khoom, cov kav dej steel tuaj yeem muab faib ua ob pawg: seamless steel kav thiab welded steel kav.Ntawm lawv, ERW steel kav yog hom tseem ceeb ntawm welded steel kav.Niaj hnub no, peb feem ntau tham txog ob hom steel kav siv los ua cov ntaub ntawv raw: seamless casing kav thiab ERW casing kav.
Seamless casing yeeb nkab - casing yeeb nkab ua los ntawm seamless steel yeeb nkab;Seamless steel yeeb nkab yog hais txog cov yeeb nkab steel ua los ntawm plaub txoj hauv kev kub dov, txias dov, kub kos duab thiab kos duab txias.Cov yeeb nkab lub cev nws tus kheej tsis muaj welds.
ERW lub cev - ERW (Electric Resistant Weld) steel yeeb nkab ua los ntawm hluav taws xob welded yeeb nkab yog hais txog longitudinal seam welded yeeb nkab ua los ntawm cov khoom siv hluav taws xob ntau zaus.Raw steel sheets (coils) rau cov kav hluav taws xob welded yog tsim los ntawm cov pa roj carbon tsawg micro-alloy steel dov los ntawm TMCP (thermomechanical tswj txheej txheem).
1. OD kam rau ua seamless steel yeeb nkab: siv cov txheej txheem kub dov, sizing tiav ntawm txog 8000 ° C.Qhov sib xyaw ntawm cov khoom siv raw, cov cua txias, thiab lub xeev txias ntawm cov yob muaj kev cuam tshuam zoo rau nws txoj kab uas hla sab nraud, yog li nws tsis yooj yim rau kev tswj cov kab uas hla sab nraud, thiab qhov kev hloov pauv loj.ERW steel yeeb nkab: nws yog tsim los ntawm txias dabtsi yog khoov, thiab nws txoj kab uas hla yog txo los ntawm 0.6%.Cov txheej txheem kub yog qhov tseem ceeb nyob rau hauv chav tsev kub, yog li cov txheej txheem sab nraud yog tswj kom raug, thiab qhov sib txawv ntawm qhov sib txawv me me, uas yog qhov tsim nyog rau kev tshem tawm cov tawv dub buckles;
2. Seamless steel yeeb nkab nrog phab ntsa thickness kam rau ua: Nws yog tsim los ntawm perforating round steel, thiab phab ntsa thickness sib txawv yog loj.Tom qab kub dov tuaj yeem tshem tawm qee qhov tsis sib xws ntawm phab ntsa tuab, tab sis cov tshuab niaj hnub no tsuas yog tswj hwm nws li ntawm ± 5 ~ 10% t.ERW steel yeeb nkab: Thaum siv kub dov coil ua raw khoom, lub thickness kam rau ua ntawm niaj hnub kub dov tuaj yeem tswj tsis pub dhau 0.05mm.
3. Qhov tsis xws luag nyob rau sab nrauv ntawm lub workpiece siv rau cov tsos ntawm seamless steel yeeb nkab tsis tuaj yeem raug tshem tawm hauv cov txheej txheem kub dov, tab sis tsuas yog tuaj yeem polished tom qab cov khoom tiav tiav, helical stroke tshuav tom qab xuas nrig ntaus tuaj yeem tsuas yog tshem tawm ib feem ntawm cov txheej txheem ntawm cov phab ntsa.ERW steel yeeb nkab yog tsim los ntawm kub dov kauj ua raw khoom.Qhov zoo ntawm lub kauj yog tib yam li qhov zoo ntawm ERW steel yeeb nkab.Qhov zoo ntawm qhov kub dov coils yog yooj yim los tswj thiab yog qhov zoo.Yog li ntawd, qhov zoo ntawm ERW steel yeeb nkab yog zoo dua li ntawm seamless steel yeeb nkab.
4. Oval seamless steel yeeb nkab: siv cov txheej txheem kub dov.Cov khoom siv raw ntawm cov yeeb nkab steel, cov cua txias thiab lub xeev txias ntawm cov yob muaj kev cuam tshuam zoo rau nws txoj kab uas hla sab nraud, yog li nws tsis yooj yim rau kev tswj cov kab sab nraud kom raug, thiab qhov kev hloov pauv loj.ERW steel yeeb nkab: ua los ntawm txias dabtsi yog khoov, sab nraud txoj kab uas hla yog precisely tswj, thiab qhov hloov pauv yog me me.
5. Tensile test Lub tensile zog ntawm seamless steel yeeb nkab thiab ERW steel yeeb nkab yog raws li API cov qauv, tab sis lub zog ntawm seamless steel yeeb nkab feem ntau yog nyob rau sab sauv txwv, thiab cov ductility yog nyob rau hauv qis qis.Ntawm qhov tsis sib xws, lub zog Performance index ntawm ERW steel yeeb nkab yog qhov zoo tshaj plaws, thiab cov plasticity Performance index yog 33.3% siab dua tus qauv.Qhov laj thawj yog vim li cas cov khoom siv raw rau ERW steel yeeb nkab, qhov kev ua tau zoo ntawm cov kub dov coil tau lees paub los ntawm micro-alloy smelting, tawm ntawm qhov cub refining, thiab tswj kom txias thiab dov;yas.Tsim nyog coincidence.
6. Cov khoom siv raw ntawm ERW steel yeeb nkab yog kub-dov coil, uas muaj qhov ua tau zoo heev hauv cov txheej txheem dov, uas tuaj yeem ua kom muaj kev ua tau zoo ntawm txhua qhov ntawm lub kauj.
7. Raw khoom ntawm ERW kub dov steel coil yeeb nkab nrog grain loj adopts dav thiab tuab nruam casting billet, nto nplua-grain solidification txheej yog tuab, tsis muaj thaj tsam ntawm cov muaju muaju, shrinkage porosity thiab pores, muaj pes tsawg leeg sib txawv me me., thiab cov qauv yog compact;tswj nyob rau hauv cov txheej txheem dov tom ntej Kev siv cov tshuab txias dov kuj ua kom cov nplej loj ntawm cov khoom siv raw.
8. Qhov kev ntsuam xyuas tsis zoo ntawm ERW steel yeeb nkab muaj feem xyuam rau cov yam ntxwv ntawm cov khoom siv raw thiab cov txheej txheem tsim khoom ntawm cov yeeb nkab.Cov phab ntsa thickness uniformity thiab ovality yog zoo dua li seamless steel kav, uas yog lub ntsiab yog vim li cas lub cev qhuav dej kuj yog siab dua li seamless steel kav.
9. Kev sim cuam tshuam Vim tias qhov toughness ntawm lub hauv paus khoom ntawm ERW steel yeeb nkab yog ob peb zaug siab dua li ntawm seamless steel yeeb nkab, lub toughness ntawm weld yog tus yuam sij rau ERW steel yeeb nkab.Los ntawm kev tswj cov ntsiab lus ntawm impurities nyob rau hauv cov khoom siv raw, qhov siab thiab kev taw qhia ntawm kev txiav burr, cov duab ntawm txoj kev ntug, vuam lub kaum sab xis, vuam ceev, lub zog cua sov thiab zaus, vuam extrusion ntim, qhov nruab nrab zaus retraction kub thiab qhov tob, qhov ntev ntawm cov cua txias seem thiab lwm yam txheej txheem tsis tau guaranteed.Lub zog weld cuam tshuam txog ntau dua 60% ntawm cov hlau puag.Nrog rau kev ua kom zoo dua ntxiv, qhov cuam tshuam lub zog ntawm cov vuam tuaj yeem nyob ze rau lub zog ntawm lub hauv paus hlau, uas ua kom tsis muaj teeb meem kev ua haujlwm.
10. Kev soj ntsuam tawg Cov kev sim tawg ntawm ERW steel kav yog ntau dua li cov qauv yuav tsum tau ua, feem ntau yog vim lub siab uniformity ntawm phab ntsa thickness thiab tib txoj kab uas hla ntawm ERW steel kav.