Hluav taws xob Resistance Welded steel kav yog tsim los ntawm kev tsim kub dov steel coils rau hauv cov duab cylindrical thiab koom nrog cov npoo npoo los ntawm kev siv vuam ntau zaus. Vim hais tias cov vuam seam yog tsim ncaj qha los ntawm cov npoo ntawm cov hlau sawb, qhov zoo ntawm cov hlau kauj yog ib qho tseem ceeb tshaj plaws uas cuam tshuam rau kev ruaj ntseg ntawm cov txheej txheem ntau lawm thiab qhov zoo ntawm cov yeeb nkab kawg. Txhua qhov tsis sib xws ntawm qhov chaw ntawm lub kauj tuaj yeem cuam tshuam rau ntug kev sib cuag, hluav taws xob cua sov tus cwj pwm thaum vuam, thiab qhov sib xws ntawm cov txheej txheem tsim.
Vim li no, cov kev cai nruj ntawm qhov zoo yog siv rau steel coils siv hauv ERW yeeb nkab ntau lawm. Cov kev cai no feem ntau tsom rau qhov muaj qhov tsis xws luag, oxide scale mob, ntug zoo, thiab flatness ntawm steel sawb. Kev tswj cov khoom no pab ua kom ruaj khov vuam, zoo ib yam yeeb nkab geometry, thiab txhim khu kev qha kev ua tau zoo hauv cov khoom tiav.
Common Surface Defects nyob rau hauv Steel Coils
Tej yam tsis xws luag pom nyob rau hauv Kub Rolled Steel Strips
| Nto Defect | Kev piav qhia | Muaj peev xwm cuam tshuam rau ERW Vuam |
|---|---|---|
| Nto tawg | Linear lossis irregular fractures ntawm strip nto | Tej zaum yuav txuas mus rau hauv weld seam thaum tsim |
| Kos thiab dents | Mechanical puas thaum tuav lossis dov | Ua rau lub siab tsis sib xws |
| suav nrog raug | Cov khoom uas tsis yog xim hlau tshwm rau saum npoo | Weakens weld seam bonding |
| Lamination | Sab hauv kev sib cais pom ntawm qhov chaw | Txo cov qauv kev ncaj ncees |
Deg tsis xws luag nyob rau hauv steel coils tuaj yeem tshwm sim los ntawm ntau theem ntawm steel ntau lawm, xws li casting, kub dov, thiab kev thauj mus los. Yog tias cov teeb meem no tsis raug kuaj pom thiab tshem tawm ua ntej ERW tsim cov txheej txheem pib, lawv tuaj yeem cuam tshuam ncaj qha rau cov txheej txheem zoo ntawm cov yeeb nkab tiav.
Cov kab nrib pleb ntawm qhov chaw yog qhov tseem ceeb tshaj plaws. Cov kab nrib pleb no tuaj yeem txhim kho thaum lub sijhawm kub dov thaum cov hlau muaj kev ntxhov siab thermal lossis ntau deformation. Thaum cov hlau sawb nkag mus rau hauv seem tsim ntawm ERW cov kab ntau lawm, cov sawb maj mam khoov mus rau hauv ib lub voj voog los ntawm kev sib sau ua ke. Cov kab nrib pleb uas twb muaj lawm tuaj yeem nthuav tawm ntxiv nyob rau hauv cov tshuab deformation, muaj peev xwm ncav cuag qhov chaw vuam lossis cov yeeb nkab phab ntsa.
Kev puas tsuaj xws li khawb thiab cov hniav tuaj yeem tshwm sim thaum tuav, kev thauj mus los, lossis khaws cia. Txawm hais tias kev khawb me me yuav tsis cuam tshuam qhov kev ua haujlwm ntawm cov yeeb nkab tam sim ntawd, kev puas tsuaj tob tuaj yeem tsim cov cheeb tsam kev ntxhov siab hauv cheeb tsam. Thaum lub sij hawm tsim thiab vuam, cov cheeb tsam no tuaj yeem deform txawv ntawm cov khoom nyob ib puag ncig, uas tuaj yeem cuam tshuam qhov tseeb qhov tseeb.
Inclusion exposure tshwm sim thaum uas tsis yog xim hlau hais los ntawm cov txheej txheem steelmaking pom nyob rau saum npoo ntawm lub sawb. Cov kev suav nrog no tuaj yeem cuam tshuam nrog cov txheej txheem metallurgical bonding thaum lub sijhawm vuam. Vim tias ERW welding cia siab rau fusion ntawm rhuab strip npoo yam tsis muaj cov khoom muab tub lim, qhov muaj kev sib txuas ntawm cov weld interface tuaj yeem ua rau cov vuam seam tsis muaj zog.
Lamination defects tshwm sim los ntawm kev sib cais sab hauv hauv cov hlau phaj thaum dov. Thaum cov teeb meem no tshwm sim ntawm lossis ze ntawm qhov chaw, lawv tuaj yeem txo qhov kev ncaj ncees ntawm cov yeeb nkab phab ntsa thiab cuam tshuam rau kev ntseeg tau ntev.
Kev cuam tshuam ntawm Oxide Scale ntawm Vuam Stability
Oxide Scale Yam ntxwv hauv Kub Rolled Coils
| Scale Condition | Yam ntxwv | Kev cuam tshuam ntawm Vuam txheej txheem |
|---|---|---|
| Lub teeb uniform scale | Nyias oxide txheej tusyees faib | Feem ntau siv tau rau vuam |
| Thick oxide nplai | Hnyav oxide txheej rau ntawm daim tawv nqaij | Txo hluav taws xob conductivity |
| Tsis sib npaug | Irregular scale thickness hla sawb | Ua rau cua sov tsis ruaj khov |
| Loose scale hais | Flaking oxide fragments | Tej zaum yuav paug weld interface |
Oxide nplai yog ib qho tshwm sim ntawm qhov kub thiab txias thaum lub sij hawm kub dov txheej txheem. Thaum cov hlau yog rhuab mus rau qhov kub siab nyob rau hauv lub xub ntiag ntawm oxygen, hlau oxides tsim rau saum npoo. Feem ntau, cov txheej nyias nyias oxide txheej tsis cuam tshuam rau ERW yeeb nkab ntau lawm.
Txawm li cas los xij, ntau tshaj oxide nplai thickness tuaj yeem cuam tshuam nrog cov txheej txheem vuam hluav taws xob. Thaum lub sij hawm ERW welding, high zaus tam sim no ntws raws cov npoo ntawm cov hlau sawb. Cov hluav taws xob tsis kam ntawm cov npoo ua kom sov, tsa cov hlau kub mus rau lub xeev yas ua ntej cov npoo raug nias ua ke los ua ib qho kev sib txuas.
Yog hais tias lub strip nto npog los ntawm tuab oxide nplai, hluav taws xob conductivity ntawm steel nto yuav raug txo. Qhov no tuaj yeem ua rau cov cua sov tsis sib xws ntawm qhov chaw vuam, uas tuaj yeem cuam tshuam rau kev tsim cov seam. Cov cua kub tsis sib haum tuaj yeem ua rau qhov tsis sib xws ntawm cov vuam nkag los yog tsis txaus fusion ntawm cov npoo npoo.
Loose scale hais kuj muaj teeb meem. Thaum cov khoom no tshem tawm ntawm qhov chaw thiab nkag mus rau qhov chaw vuam, lawv tuaj yeem raug daig ntawm cov npoo rhuab. Xws li kev sib kis tuaj yeem ua rau cov txheej txheem sib txuas ntawm cov hlau tsis muaj zog thiab txo lub zog ntawm vuam seam.
Qhov tseem ceeb ntawm Edge Quality hauv ERW Vuam
Cov txheej txheem vuam nyob rau hauv ERW yeeb nkab ntau lawm tshwm sim precisely ntawm cov npoo ntawm steel sawb. Vim li no, qhov zoo ntawm cov npoo npoo yog qhov tseem ceeb tshwj xeeb. Hlau coils feem ntau yog hlais rau hauv txoj kab nqaim ua ntej nkag mus rau hauv cov yeeb nkab ntau lawm kab, thiab ntug kev mob tom qab slitting yuav tsum ua raws li cov kev cai nruj.
Cov npoo du thiab ncaj tso cai rau kev sib dhos kom zoo thaum lub sijhawm tsim. Thaum cov hlau sawb maj mam khoov mus rau hauv cov duab cylindrical, ob lub npoo yuav tsum tau raws li qhov tseeb ntawm qhov vuam taw tes. Yog tias cov npoo tsis sib npaug los yog muaj burrs, kev sib cuag ntawm lawv yuav ua tsis tiav.
Ntug burrs yog me me protrusions tsim thaum lub sij hawm slitting txheej txheem. Yog tias cov burrs tseem nyob ntawm cov npoo npoo, lawv tuaj yeem cuam tshuam cov txheej txheem vuam los ntawm kev tiv thaiv kev sib cuag ntawm ob lub npoo. Qhov no tuaj yeem ua rau tsis tiav fusion lossis tsis sib xws weld seam geometry.
Ntug waviness yog lwm qhov teeb meem tshwm sim. Thaum cov npoo tsis ncaj, qhov kev ncua deb ntawm lawv yuav hloov pauv thaum lub sijhawm vuam. Xws li kev hloov pauv tuaj yeem ua rau cov cua sov tsis ruaj khov thiab tsis sib haum xeeb ntawm weld seam tsim.
Kev tuav cov ntug zoo kom ntseeg tau tias cov npoo tau raws li qhov tseeb hauv cov vuam electrodes thiab tias lub siab siv los ntawm cov yob yob ua rau lub vuam tsis sib xws.
Lub luag hauj lwm ntawm Sawb Flatness hauv txoj kev ruaj ntseg
Lub flatness ntawm steel sawb kuj yog ib qho tseem ceeb hauv ERW yeeb nkab ntau lawm. Ua ntej vuam tshwm sim, lub sawb hla dhau los ntawm ntau qhov sib sau sawv ntsug uas maj mam ua cov khoom siv rau hauv ib puag ncig yeeb nkab profile. Yog hais tias lub strip tsis zoo flatness los yog loj waviness, txoj kev tsim yuav ua tsis ruaj tsis khov.
Kev tsis sib xws tuaj yeem ua rau qee qhov ntawm cov sawb khoov yooj yim dua li lwm tus. Qhov no tuaj yeem ua rau tsis xwm yeem deformation thaum lub sijhawm tsim, ua rau cov yeeb nkab ovality lossis qhov sib txawv ntawm qhov sib txawv. Nyob rau hauv cov xwm txheej hnyav, qhov tsis zoo yuav ua rau tsis zoo ntawm cov npoo npoo ua ntej vuam, uas cuam tshuam ncaj qha rau vuam seam zoo.
Kev sib txhuam strip flatness tso cai rau cov yob sib sau ua cov txheej txheem siab raws tag nrho qhov dav ntawm cov sawb. Qhov no ua kom du deformation thiab ruaj khov ntug kev sib raug zoo, ob qho tib si uas tsim nyog rau kev tsim cov kav dej ERW zoo.
Qhov tseem ceeb ntawm Surface Quality Control nyob rau hauvERW Yeeb Nkab Manufacturing
Nyob rau hauv niaj hnub ERW yeeb nkab manufacturing, nruj soj ntsuam thiab kev tswj cov txheej txheem yog siv los soj ntsuam cov nto ntawm steel coils ua ntej lawv nkag mus rau hauv cov kab ntau lawm. Cov kev tshuaj xyuas no yuav suav nrog kev kuaj pom, ntsuas qhov chaw, thiab ntsuas qhov ntsuas kom pom qhov tsis xws luag uas tuaj yeem cuam tshuam rau kev ruaj khov.
Los ntawm kev tswj xyuas qhov tsis xws luag, oxide nplai, ntug zoo, thiab strip flatness, cov tuam ntxhab tuaj yeem tswj xyuas qhov kev ua haujlwm ruaj khov thiab ua haujlwm zoo sib xws. High quality steel coils txo qhov kev pheej hmoo ntawm weld tsis xws luag, txhim kho qhov tseeb qhov tseeb, thiab txhim khu kev ntseeg tau ntev ntawm cov kav dej tiav.
Raws li ERW yeeb nkab ntau lawm tshuab txuas ntxiv mus, qhov tseem ceeb ntawm cov khoom siv raw khoom zoo tseem yog qhov tseem ceeb. Ua tib zoo tswj cov txheej txheem steel coil saum npoo yuav pab xyuas kom meej tias cov txheej txheem vuam ua haujlwm zoo thiab cov kav dej ua tau raws li qhov xav tau ntawm kev siv engineering niaj hnub.
