Raws li txoj kev tsim khoom, cov kav hlau muaj peev xwm muab faib ua ob pawg: cov kav hlau tsis muaj seamless thiab cov kav hlau welded. Ntawm lawv, cov kav hlau ERW yog hom kav hlau welded tseem ceeb. Niaj hnub no, peb feem ntau tham txog ob hom kav hlau siv ua cov khoom siv raw casing: cov kav hlau seamless casing thiab cov kav hlau ERW casing.
Cov yeeb nkab tsis muaj qhov txuas - cov yeeb nkab ua los ntawm cov yeeb nkab hlau tsis muaj qhov txuas; Cov yeeb nkab hlau tsis muaj qhov txuas yog cov yeeb nkab hlau ua los ntawm plaub txoj kev dov kub, dov txias, kos duab kub thiab kos duab txias. Lub cev yeeb nkab nws tus kheej tsis muaj welds.
ERW lub cev - ERW (Fais fab Resistant Weld) cov yeeb nkab hlau ua los ntawm cov yeeb nkab hluav taws xob welded yog hais txog cov yeeb nkab longitudinal seam welded ua los ntawm kev vuam zaus siab. Cov ntawv hlau nyoos (coils) rau cov yeeb nkab hluav taws xob-welded yog ua los ntawm cov hlau carbon tsawg-carbon micro-alloy dov los ntawm TMCP (thermomemechanical tswj txheej txheem).
1. OD kam rau siab seamless steel yeeb nkab: siv cov txheej txheem kub-dov, sizing tiav ntawm txog 8000 ° C. Cov khoom siv raw, cov xwm txheej txias, thiab lub xeev txias ntawm lub yob muaj kev cuam tshuam loj rau nws lub cheeb sab nraud, yog li nws nyuaj rau tswj lub cheeb sab nraud kom raug, thiab qhov ntau thiab tsawg hloov pauv loj. ERW steel yeeb nkab: nws yog tsim los ntawm kev khoov txias, thiab nws lub cheeb yog txo los ntawm 0.6%. Qhov kub ntawm cov txheej txheem yog qhov ruaj khov ntawm chav tsev kub, yog li lub cheeb sab nraud raug tswj kom raug, thiab qhov ntau thiab tsawg hloov pauv me me, uas yog qhov zoo rau kev tshem tawm cov tawv dub buckles;
2. Cov yeeb nkab hlau tsis muaj qhov sib txuas nrog phab ntsa tuab: Nws yog tsim los ntawm kev tho qhov hlau puag ncig, thiab qhov sib txawv ntawm phab ntsa tuab yog loj. Tom qab ntawd kub dov tuaj yeem tshem tawm qhov tsis sib xws ntawm phab ntsa tuab, tab sis cov tshuab niaj hnub tshaj plaws tsuas yog tuaj yeem tswj nws hauv ± 5 ~ 10% t. ERW yeeb nkab hlau: Thaum siv cov kauj kub dov ua cov khoom siv raw, qhov tuab kam rau ntawm cov kub dov niaj hnub tuaj yeem tswj tau hauv 0.05 hli.
3. Cov qhov tsis zoo ntawm qhov chaw sab nraud ntawm cov khoom siv uas siv rau qhov zoo li cov yeeb nkab hlau tsis sib haum tsis tuaj yeem tshem tawm hauv cov txheej txheem dov kub, tab sis tsuas yog tuaj yeem ua kom tiav tom qab cov khoom tiav lawm, qhov mob stroke helical uas tshuav tom qab xuas nrig tsuas yog tuaj yeem tshem tawm ib feem hauv cov txheej txheem ntawm kev txo cov phab ntsa. ERW yeeb nkab hlau yog ua los ntawm cov kauj kub dov ua cov khoom siv raw. Qhov zoo ntawm qhov chaw ntawm cov kauj yog tib yam li qhov zoo ntawm qhov chaw ntawm ERW yeeb nkab hlau. Qhov zoo ntawm qhov chaw ntawm cov kauj kub dov yog yooj yim los tswj thiab yog qhov zoo. Yog li ntawd, qhov zoo ntawm qhov chaw ntawm ERW yeeb nkab hlau zoo dua li ntawm cov yeeb nkab hlau tsis sib haum.
4. Cov yeeb nkab hlau oval seamless: siv cov txheej txheem dov kub. Cov khoom siv raw ntawm cov yeeb nkab hlau, cov xwm txheej txias thiab lub xeev txias ntawm lub yob muaj kev cuam tshuam loj rau nws txoj kab uas hla sab nraud, yog li nws nyuaj rau tswj qhov txoj kab uas hla sab nraud kom raug, thiab qhov ntau thiab tsawg ntawm kev hloov pauv loj. ERW yeeb nkab hlau: tsim los ntawm kev khoov txias, qhov txoj kab uas hla sab nraud raug tswj hwm kom raug, thiab qhov ntau thiab tsawg ntawm kev hloov pauv me me.
5. Kev sim tensile Cov khoom tensile ntawm cov yeeb nkab hlau tsis sib xws thiab ERW yeeb nkab hlau yog raws li cov qauv API, tab sis lub zog ntawm cov yeeb nkab hlau tsis sib xws feem ntau yog nyob rau ntawm qhov txwv siab tshaj plaws, thiab qhov ductility yog nyob rau ntawm qhov txwv qis dua. Ntawm qhov tsis sib xws, qhov ntsuas lub zog ntawm ERW yeeb nkab hlau yog nyob rau hauv qhov zoo tshaj plaws, thiab qhov ntsuas plasticity yog 33.3% siab dua tus qauv. Qhov laj thawj yog tias ua cov khoom siv raw rau ERW yeeb nkab hlau, kev ua tau zoo ntawm cov kauj kub dov yog lav los ntawm micro-alloy smelting, tawm ntawm lub cub tawg refining, thiab tswj kev txias thiab dov; yas. Kev sib xws tsim nyog.
6. Cov khoom siv raw ntawm ERW steel yeeb nkab yog kub-kuav los ntawm kauj, uas muaj qhov tseeb siab heev hauv cov txheej txheem dov, uas tuaj yeem ua kom muaj kev ua tau zoo ntawm txhua qhov ntawm lub kauj.
7. Cov khoom siv raw ntawm ERW kub dov hlau kauj yeeb nkab nrog cov noob loj siv dav thiab tuab txuas ntxiv casting billet, qhov saum npoo ntawm cov noob zoo-qoob solidification txheej yog tuab, tsis muaj thaj chaw ntawm cov siv lead ua ke, shrinkage porosity thiab pores, kev sib txawv ntawm cov khoom sib xyaw yog me me. , thiab cov qauv yog compact; kev tswj hwm hauv cov txheej txheem dov tom ntej Kev siv cov thev naus laus zis dov txias ntxiv rau qhov ua kom cov noob loj ntawm cov khoom siv raw.
8. Kev sim tiv thaiv kev plam ntawm ERW steel yeeb nkab yog cuam tshuam nrog cov yam ntxwv ntawm cov khoom siv raw thiab cov txheej txheem tsim khoom ntawm cov yeeb nkab. Lub thickness uniformity thiab ovality ntawm phab ntsa zoo dua li cov yeeb nkab hlau seamless, uas yog qhov laj thawj tseem ceeb uas ua rau kev tiv thaiv kev tawg siab dua li cov yeeb nkab hlau seamless.
9. Kev ntsuam xyuas qhov cuam tshuam Vim tias qhov tawv ntawm cov khoom siv hauv paus ntawm ERW steel yeeb nkab yog ntau zaus siab dua li ntawm cov yeeb nkab hlau seamless, qhov tawv ntawm qhov vuam yog qhov tseem ceeb rau ERW steel yeeb nkab. Los ntawm kev tswj cov ntsiab lus ntawm cov khoom tsis huv hauv cov khoom siv raw, qhov siab thiab kev coj ntawm qhov txiav burr, cov duab ntawm ntug tsim, lub kaum sab xis vuam, qhov ceev vuam, lub zog cua sov thiab zaus, qhov ntim vuam extrusion, qhov nruab nrab zaus retraction kub thiab tob, qhov ntev ntawm qhov cua txias thiab lwm yam txheej txheem tau lees paub. Lub zog vuam cuam tshuam ncav cuag ntau dua 60% ntawm cov hlau hauv paus. Nrog kev ua kom zoo dua ntxiv, lub zog cuam tshuam ntawm qhov vuam tuaj yeem ze rau lub zog ntawm cov hlau hauv paus, uas ua kom muaj teeb meem ua haujlwm.
10. Kev sim tawg Kev ua tau zoo ntawm kev sim tawg ntawm ERW cov kav hlau yog siab dua li cov qauv xav tau, feem ntau yog vim qhov sib xws ntawm phab ntsa tuab thiab tib lub cheeb sab nraud ntawm ERW cov kav hlau.