Electric Resistance Welded carbon steel kav yog dav siv nyob rau hauv cov txheej txheem, roj thiab roj tsheb thauj mus los, dej pipelines, thiab mechanical engineering. Tsis zoo li submerged arc welded kav uas tso siab rau cov khoom siv hlau thiab kev tiv thaiv flux, ERW cov kav dej yog tsim los ntawm siab - zaus hluav taws xob tsis kam vuam, cov txheej txheem tshwj xeeb los ntawm kev ceev, precision, thiab tswj cov cua sov. Txoj kev tsim khoom ncaj qha cuam tshuam rau kev ncaj ncees, qhov tseeb qhov tseeb, thiab kev ua haujlwm txhua yam. Kev nkag siab txog cov txheej txheem tsim khoom tseem ceeb thiab seb lawv txawv li cas ntawm LSAW thiab SSAW vuam txoj kev yog qhov tseem ceeb rau kev ntsuas cov yeeb nkab zoo thiab kev thov kom haum.
Raw Material Preparation and forming Method
Steel Coil Xaiv thiab Kev Npaj
ERW cov kav dej yog tsim los ntawm kub -rolled steel coils. Cov tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm lub kauj yog tswj raws li qib yeeb nkab uas yuav tsum tau ua. Ua ntej tsim, cov npoo npoo yog txiav kom ntseeg tau tias qhov dav dav thiab du nto, uas yog qhov tseem ceeb rau kev vuam seam zoo.
Tom qab ntawd lub sawb yog uncoiled thiab noj tsis tu ncua mus rau hauv ib tug sib sau zeb. Tsis zoo li phaj-raws li kev tsim cov yeeb nkab, ERW ntau lawm yog automated thiab nruam, tso cai rau kev ua haujlwm siab.
Txias sib sau ua Tubular puab
Cov txheej txheem tsim muaj ntau lub yob sawv ntsug uas maj mam khoov lub tiaj tiaj tiaj mus rau hauv ib lub voj voog. Lub deformation tshwm sim zuj zus, txo qhov seem ntawm kev ntxhov siab. Thaum lub sij hawm lub sawb mus txog qhov chaw nres tsheb vuam, cov npoo yog precisely ua ke los tsim ib tug nqaim V -zoo li tus qhib rau saum.
Txoj kev ua kom raug ncaj qha cuam tshuam rau weld seam alignment thiab dimensional kam rau ua. Niaj hnub nimno mills ntiav cov ntug tsis siv neeg qhov chaw thiab txoj kab uas hla tswj lub tshuab kom paub meej qhov sib npaug thiab cov phab ntsa tuab.
Cov lus hauv qab no qhia txog cov theem tseem ceeb hauv ERW manufacturing.
| Qib ntau lawm | Txheej txheem piav qhia | Technical Objective | Kev cuam tshuam zoo |
|---|---|---|---|
| Coil Kev Npaj | Ntug trimming thiab leveling | Uniform strip geometry | ruaj khov weld seam |
| Progressive forming | Multi- yob txias dabtsi yog khoov | Cylindrical shaping | Dimensional raug |
| Siab -Vuam zaus | Hluav taws xob kuj forging | Seam sib txuas | Cov qauv kev ncaj ncees |
| Sizing & Straightening | Txoj kab uas hla calibration | Qhov kawg dimension tswj | Tolerance ua raws |
| Kev Tshawb Fawb & Kev Xeem | NDT thiab hydrostatic test | Kev kuaj pom tsis raug | Kev ntseeg tau |
Cov txheej txheem no ua kom muaj txiaj ntsig zoo thiab rov ua kom zoo dua.
Siab -Frequency Electrical Resistance Vuam Txoj Cai
Vuam Mechanism
Lub ntsiab lus ntawm ERW ntau lawm yog siab - zaus hluav taws xob tsis kam vuam. High - zaus tam sim no, feem ntau nyob rau hauv thaj tsam ntawm 100–500 kHz, yog qhia rau cov kab txaij sib npaug. Cov hluav taws xob tam sim no ntws mus rau saum npoo ntawm cov hlau vim yog cov nyhuv ntawm daim tawv nqaij thiab concentrates ntawm cov npoo vim cov nyhuv sib thooj.
Raws li kev tiv thaiv ntawm qhov chaw tiv tauj tsim cov cua sov hauv zos, cov npoo ncav cuag cov yas kub hauv milliseconds. Mechanical siab yog ces siv los ntawm nyem yob, forging lub rhuab npoo ua ke yam tsis muaj ntxiv ntawm muab tub lim hlau. Cov khoom molten tshaj yog raug tshem tawm raws li flash thiab tom qab tshem tawm.
Cov khoom no - xeev forging mechanism tsim ib qho kev sib txuas nrog metallurgical txuas ntxiv zoo ib yam li cov khoom siv niam txiv thaum tswj tau zoo.
Thaum tshav kub kub input thiab Efficiency
Piv nrog rau arc vuam txoj kev, siab - zaus kuj welding qhia txo qis tag nrho cov cua sov input. Lub tshav kub nqaim- thaj tsam cuam tshuam thiab lub sij hawm cua sov luv luv txo cov nplej coarsening thiab residual stress accumululation. Qhov no ua rau muaj kev sib raug zoo txhua yam khoom thoob plaws lub weld seam.
Kev tswj cov cua sov-Teb chaws cuam tshuam (HAZ)
Qhov tseem ceeb ntawm HAZ Management
Thaum tshav kub kub- thaj tsam cuam tshuam yog thaj av uas nyob ib sab ntawm lub vuam seam qhov twg microstructure hloov vim yog thermal raug. Hauv ERW cov kav dej, HAZ tswj yog qhov tseem ceeb vim tias cov cua sov ntau dhau yuav ua rau cov qoob loo loj hlob, kev hloov pauv ntawm hardness, lossis txo cov tawv nqaij.
Vim tias ERW vuam tshwm sim sai heev thiab tsis muaj cov khoom siv muab tub lim, HAZ feem ntau nqaim dua li hauv cov txheej txheem submerged arc vuam. Txawm li cas los xij, kev tswj tsis raug cai tuaj yeem ua rau tsis tiav fusion lossis hnyav dhau.
Txheej txheem Parameters cuam tshuam HAZ
Cov hloov pauv tseem ceeb muaj xws li vuam tam sim no zaus, lub zog tawm tswv yim, nyem siab, thiab kab nrawm. Ntau zaus txhim kho ntug cua sov concentration thiab txo cov cua sov nkag mus tob. Qhov tseeb synchronization ntawm tam sim no thiab mechanical siab ua kom muaj kev sib raug zoo.
Tom qab-weld kev kho cua sov tuaj yeem siv rau hauv qee cov qib kom normalize microstructure thiab txo cov kev ntxhov siab uas seem, tshwj xeeb tshaj yog rau siab dua - daim ntawv thov cov kav dej.
Kev sib piv nrog LSAW thiab SSAW Vuam Txoj Kev
Vuam Tshuab Qhov txawv
LSAW thiab SSAW kav siv submerged arc vuam, fusion vuam txheej txheem uas siv cov hlau muab tub lim thiab granular flux. Lub arc yog submerged nyob rau hauv flux, muab shielding thiab tob tob. Cov txheej txheem no feem ntau cuam tshuam nrog ntau qhov kev sib txuas, tshwj xeeb tshaj yog rau cov kav dej tuab - phab ntsa.
Nyob rau hauv sib piv, ERW cia siab rau cov cua kub tsis kam thiab forging siab yam tsis muaj muab tub lim hlau. Lub vuam yog tsim los ntawm cov khoom sib txuas-phase bonding es tsis yog arc melting.
Cov qauv thiab kev ua haujlwm cuam tshuam
Vim tias LSAW siv cov phaj tuab tuab thiab sib sib zog nqus - vuam vuam, nws tsim nyog rau cov phab ntsa hnyav thiab siab - cov kav dej siab. SSAW, uas kuj siv submerged arc vuam tab sis nrog ib tug kauv seam, tso cai loj - txoj kab uas hla ntau lawm los ntawm steel kauj. Txawm li cas los xij, lub kauv seam nce tag nrho cov vuam ntev, yuav tsum tau kuaj xyuas.
ERW cov kav dej feem ntau muab qhov zoo tshaj qhov raug thiab ua kom nrawm dua, ua rau lawv raug nqi -zoo rau cov kab me me thiab nruab nrab. Txawm li cas los xij, phab ntsa thickness muaj peev xwm feem ntau qis dua piv rau LSAW.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm cov tub ntxhais vuam sib txawv.
| Parameter | ERW | LSAW | SSAW |
|---|---|---|---|
| Vuam txoj kev | Siab -frequency resistance | Submerged arc (longitudinal) | Submerged arc (kauv) |
| Filler Hlau | Tsis siv | Siv | Siv |
| Kub Input | Tsawg | Nruab nrab mus rau siab | Nruab nrab |
| HAZ dav | Nqaim | Dav dua | Dav dua |
| Haum phab ntsa Thickness | Nruab nrab | tuab | Nruab nrab mus rau tuab |
| Ntau lawm ceev | Siab | Nruab nrab | Nruab nrab |
Qhov kev sib piv no qhia txog qhov sib txawv ntawm cov hlau thiab kev ua haujlwm ntawm txhua tus txheej txheem.
Quality Assurance thiab Final Processing
Tom qab vuam, ERW cov kav dej dhau los ntawm qhov loj me kom ua tiav txoj kab uas hla thiab qhov sib npaug. Kev ntsuam xyuas online tsis muaj kev puas tsuaj, feem ntau kuaj xyuas ultrasonic, txheeb xyuas qhov kev ncaj ncees ntawm vuam. Kev ntsuas hydrostatic siab lees paub qhov tsis kam tiv thaiv thiab kev ua haujlwm ntawm cov qauv.
Deg xov, straightening, thiab txiav kom ntev ntev ua tiav cov txheej txheem. Cov khoom kawg sib xyaw ua ke qhov sib xws, txhim khu kev qha vuam zoo, thiab kev tsim khoom lag luam zoo.
Xaus
Txoj kev tsim khoom ntawmERW carbon steel kavyog nyob rau hauv siab - zaus hluav taws xob tsis kam welding, uas ua rau forged longitudinal seam nrog tsawg tshav kub input thiab high efficiency efficiency. Progressive txias sib sau ua kom paub tseeb geometry, thaum lub sij hawm meej tswj ntawm vuam tsis tswj qhov nqaim thiab ruaj khov cua sov- thaj tsam cuam tshuam. Piv nrog LSAW thiab SSAW kav uas tso siab rau submerged arc vuam nrog cov hlau muab tub lim, ERW muaj ntau lawm sai dua thiab zoo heev dimensional precision rau me me mus rau nruab nrab diameters. Kev nkag siab txog cov txheej txheem sib txawv no ua rau cov kws tshaj lij xaiv cov yeeb nkab uas tsim nyog raws li cov kev xav tau siab, txoj kab uas hla, thiab kev txiav txim siab nyiaj txiag, ua kom muaj kev nyab xeeb thiab siv tau zoo hauv ntau qhov chaw ua haujlwm.
