Hluav taws xob Resistance Welded steel kav yog siv dav hauv kev tsim kho, kev thauj mus los ntawm lub zog, kev tsim kho hauv nroog, thiab kev lag luam. Kev ua tau zoo thiab kev ntseeg siab ntawm cov kav dej no nyob ntawm ntau yam ntawm cov khoom siv raw siv thaum tsim khoom. Tsis zoo li qee txoj kev tsim cov yeeb nkab uas tso siab rau cov phaj tuab lossis cov hlau muab tub lim ntxiv, ERW cov kav dej feem ntau yog tsim los ntawm kub dov steel coils. Cov coils no maj mam tsim rau hauv cylindrical duab thiab welded longitudinally los ntawm high zaus hluav taws xob tiv thaiv cua sov. Vim tias tag nrho cov yeeb nkab lub cev pib los ntawm cov hlau sawb, qhov zoo thiab cov yam ntxwv ntawm cov khoom siv raw ua lub luag haujlwm txiav txim siab qhov tseeb qhov tseeb, txhua yam muaj zog, thiab vuam seam kev ua tau zoo ntawm ERW kav.
Cov khoom siv tseem ceeb siv hauv ERW Pipe Production
Yam khoom siv rau ERW Manufacturing
| Raw Material Hom | Kev piav qhia | Lub luag haujlwm hauv Pipe Production |
|---|---|---|
| Kub dov steel kauj | Tsawg carbon steel sawb nkag rau hauv daim ntawv coil | Cov khoom siv hauv paus tseem ceeb rau kev tsim cov yeeb nkab |
| Pickled steel kauj | Oxide nplai tshem tawm los ntawm kub dov kauj | Txhim kho qhov huv si rau vuam |
| Alloyed carbon steel kauj | Cov hlau uas muaj kev tswj xyuas cov ntsiab lus alloy | Txhim khu lub zog thiab toughness |
| Hlau strips | Precisely trimmed strip ntug | Qhov chaw tseem ceeb rau ERW vuam |
Cov khoom siv tseem ceeb tshaj plaws siv hauv ERW yeeb nkab tsim yog kub dov steel kauj. Cov coils no yog tsim nyob rau hauv steel mills los ntawm ib tug dov txheej txheem uas rhuab steel slabs yog maj txo nyob rau hauv thickness thiab mob rau hauv loj coils. Qhov dav thiab tuab ntawm cov hlau kauj txiav txim siab kawg cov yeeb nkab txoj kab uas hla thiab phab ntsa thickness. Vim hais tias cov sawb txuas ntxiv tsim rau hauv ib puag ncig zoo thaum lub sij hawm tsim cov yeeb nkab, qhov sib npaug ntawm cov kauj yog qhov tseem ceeb heev.
Pickled steel coils yog lwm yam tseem ceeb ntawm cov khoom siv raw siv hauv cov kab ntau lawm ERW. Thaum lub sij hawm kub dov txheej txheem, steel nto ib txwm tsim oxide nplai vim raug rau qhov kub thiab txias. Pickling tshem tawm cov txheej txheem oxide no los ntawm kev kho tshuaj, ua rau lub ntsej muag huv. Lub tshuab ntxhua khaub ncaws hlau txhim kho hluav taws xob conductivity thaum lub sij hawm vuam txheej txheem thiab txo qhov muaj peev xwm ntawm weld seam paug.
Qee cov kav dej ERW yog tsim los siv cov hlau alloyed carbon steel coils uas tswj cov khoom xws li manganese, silicon, lossis microalloying ntxiv. Cov alloying cov ntsiab lus no pab txhim kho txhua yam muaj zog, toughness, thiab tsis kam mus deformation. Rau cov kav dej ua haujlwm nyob rau hauv cov xwm txheej siab dua lossis kev siv cov qauv uas xav tau ntau dua lub peev xwm, cov ntaub ntawv alloyed no muab kev ua tau zoo.
Cov npoo ntawm cov hlau sawb kuj yog ib feem tseem ceeb ntawm cov khoom siv raw. Txij li thaum ERW vuam txheej txheem koom nrog ob lub strip npoo ua ke, cov npoo yuav tsum raug txiav kom meej thiab tsis pub muaj burrs lossis qhov tsis sib xws. Kev npaj ntawm ntug kev ua kom muaj kev sib cuag ruaj khov thaum lub sij hawm vuam thiab pab tsim ib qho kev sib txuam weld seam.
Chemical thiab Mechanical Requirements ntawm Raw Materials
Cov cuab yeej cuab tam thiab tshuaj lom neeg ntawm ERW Coil Materials
| Khoom | Hom kab mob | Qhov tseem ceeb hauv ERW Pipes |
|---|---|---|
| Cov ntsiab lus carbon | 0.05-0.25 feem pua | Influences lub zog thiab weldability |
| Yield zog | 235-485 MPa | Txiav txim siab qhov muaj peev xwm load |
| Tensile zog | 370-570 MPa | Reflects tag nrho cov yeeb nkab zog |
| Elongation | 20-30 feem pua | Qhia ductility thiab tsim muaj peev xwm |
Cov tshuaj muaj pes tsawg leeg ntawm steel coils siv hauv ERW yeeb nkab tsim yuav tsum tau ua tib zoo tswj kom ntseeg tau tias ob qho tib si weldability thiab kev ua haujlwm txhua yam. Cov pa roj carbon monoxide yog lub hauv paus tseem ceeb hauv cov pa roj carbon steel, tab sis cov ntsiab lus carbon ntau dhau tuaj yeem txo qhov weldability thiab ua rau muaj kev pheej hmoo ntawm kev tawg hauv thaj tsam weld. Yog li ntawd, feem ntau ERW yeeb nkab steels muaj cov pa roj carbon tsawg kom tso cai rau vuam ruaj khov thiab ua haujlwm.
Manganese feem ntau ntxiv los txhim kho lub zog thiab tawv thaum tseem pab tiv thaiv qhov tsis zoo ntawm sulfur impurities. Silicon feem ntau suav nrog ua cov khoom deoxidizing thaum lub sij hawm steelmaking thiab tuaj yeem ua rau muaj kev nce qib hauv lub zog yam tsis muaj kev txo qis ductility.
Mechanical zog ntawm steel kauj kuj ua lub luag haujlwm tseem ceeb hauv kev tsim cov txheej txheem. Lub sawb steel yuav tsum muaj zog txaus kom ua tau raws li qhov xav tau ntawm cov yeeb nkab kawg, tab sis nws tseem yuav tsum nyob twj ywm kom txaus kom tau txais ntau theem ntawm yob txoj kev tsis tawg. Tsim nyog elongation tso cai rau cov khoom siv los khoov maj mam mus rau hauv ib lub voj voog thaum tuav cov qauv kev ncaj ncees.
Lub zog tawm los txiav txim siab lub peev xwm ntawm cov kabmob ntawm cov yeeb nkab tiav, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem los yog cov kav dej siab. Cov ntaub ntawv muaj zog ntau dua tso cai rau cov kav dej kom tiv taus ntau dua sab hauv los yog sab nraud loads thaum tswj qhov seem stability.
Influence ntawm Coil Geometry thiab Dimensions
Hauv ERW yeeb nkab ntau lawm, qhov dav thiab tuab ntawm cov hlau kauj ncaj qha txiav txim siab qhov loj ntawm cov kav dej tiav. Lub sawb dav yog tsim raws li lub hom phiaj yeeb nkab txoj kab uas hla, thaum lub strip thickness sib haum mus rau qhov xav tau phab ntsa thickness ntawm cov yeeb nkab.
Uniform coil thickness yog qhov tseem ceeb rau kev tswj qhov tseeb qhov tseeb thaum lub sijhawm tsim. Yog hais tias lub thickness sib txawv heev nyob rau hauv lub coil dav, txoj kev rolls yuav siv tsis sib xws, uas yuav ua rau ovality los yog phab ntsa thickness variation nyob rau hauv cov yeeb nkab tiav. Xws li irregularities tuaj yeem cuam tshuam rau kev sib txuas ntawm cov kav dej thiab txo cov kev ntseeg ntawm cov qauv.
Qhov dav kam rau ua ntawm steel sawb kuj cuam tshuam rau vuam stability. Yog hais tias lub sawb dav fluctuates dhau qhov kev txwv, cov npoo yuav tsis sib haum zoo thaum nkag mus rau qhov chaw nres tsheb vuam. Kev sib raug zoo yog tsim nyog rau cov cua kub sib xws thiab forging siab thaum lub sij hawm ERW vuam txheej txheem.
Niaj hnub nimno steel mills siv cov txheej txheem dov thiab ntsuas cov cuab yeej los tswj kom nruj qhov ntev ntawm cov hlau coils. Cov kev txhim kho no ua kom ntseeg tau tias cov khoom siv raw nkag mus rau ERW cov kab ntau lawm ua tau raws li cov kev cai geometric nruj.
Kev sib raug zoo ntawm cov khoom siv raw thiab vuam kev ua tau zoo
Lub vuam theem yog ib qho ntawm cov theem tseem ceeb tshaj plaws hauv ERW yeeb nkab tsim, thiab cov yam ntxwv ntawm cov khoom siv raw muaj kev cuam tshuam ncaj qha rau vuam seam zoo. Thaum lub sij hawm welding, high zaus hluav taws xob tam sim no heats cov npoo ntawm cov hlau sawb kom txog thaum lawv ncav cuag lub xeev yas. Cov npoo rhuab yog tom qab ntawd nias ua ke los tsim ib daim ntawv cog lus.
Yog tias cov khoom siv raw muaj cov kab mob hauv qhov chaw, hnyav oxide nplai, los yog cov khoom sib txuas nyob ze ntawm cov npoo, cov teeb meem no tuaj yeem cuam tshuam rau txoj kev sib txuas. Kev sib txuas tsis zoo tuaj yeem ua rau tsis tiav fusion lossis txo qis weld seam zog. Kev huv thiab cov hlau tsis sib xws yog li ntawd ua rau muaj kev ruaj khov dua.
Lub metallurgical zog ntawm cov khoom siv raw kuj cuam tshuam rau microstructure ntawm weld seam thiab tshav kub cuam tshuam cheeb tsam. Cov hlau uas muaj cov tshuaj sib npaug sib npaug thiab tswj cov khoom sib npaug ntawm cov khoom tsim cov vuam seams nrog zoo toughness thiab tsis kam mus tawg.
Cov khoom siv raw zoo sib xws kuj tso cai rau cov tuam txhab tsim cov khoom siv vuam ruaj khov xws li qhov zaus tam sim no, cua sov kub, thiab forging siab. Thaum cov khoom siv raw sib txawv hauv cov khoom sib txawv lossis cov khoom siv kho tshuab, cov txheej txheem vuam yuav nyuaj rau tswj.
Qhov tseem ceeb ntawm Raw Material Selection hauv ERW Pipe Manufacturing
Kev xaiv cov khoom siv raw yog ib qho kev txiav txim siab tseem ceeb tshaj plaws hauv ERW yeeb nkab tsim. High quality steel coils nrog kev tswj cov tshuaj muaj pes tsawg leeg, zoo ib yam khoom siv, thiab meej qhov ntev kam rau ua muab lub hauv paus muaj zog rau tsim cov kav dej txhim khu kev qha.
Hauv cov chaw tsim khoom siv yeeb nkab niaj hnub no, cov khoom siv hlau xaim feem ntau raug soj ntsuam nruj ua ntej nkag mus rau cov kab ntau lawm. Surface condition, dimensional precision, and chemical composition are all verified to ensure that the material as well as the xav tau kev cai.
Los ntawm kev xaiv cov ntaub ntawv tsim nyog thiab kev tswj xyuas nruj zoo thoob plaws hauv cov txheej txheem tsim khoom, ERW yeeb nkab cov neeg tsim khoom tuaj yeem ua tiav qhov ruaj khov weld seam zoo, cov yeeb nkab geometry, thiab txhim khu kev qha kev ua haujlwm. Cov yam tseem ceeb no ua kom cov kav dej ERW txuas ntxiv ua tau raws li qhov xav tau ntawm kev lag luam xws li kev thauj mus los ntawm lub zog, kev tsim vaj tsev, thiab kev tsim kho hauv nroog.
