Nyob rau hauv kev tsim cov hlab ntsha siab, thaum submerged arc vuam yog siv los welding longitudinal weld ntawm lub tog raj kheej, cov kab nrib pleb (tom qab no hu ua cov kab nrib pleb) feem ntau tshwm sim ntawm los yog ze rau qhov kawg ntawm qhov ntev weld.
Ntau tus neeg tau tshawb fawb txog qhov no, thiab ntseeg tias qhov laj thawj tseem ceeb ntawm cov kab nrib pleb tawg yog tias thaum lub vuam arc nyob ze rau lub davhlau ya nyob twg ntawm qhov ntev vuam, qhov vuam nthuav dav thiab deforms nyob rau hauv cov kev taw qhia axial, thiab yog nrog los ntawm transverse nro hauv. ntsug thiab axial kev taw qhia.qhib deformation;
Lub tog raj kheej lub cev kuj muaj kev ua haujlwm txias ua haujlwm nyuaj thiab sib dhos kev ntxhov siab hauv cov txheej txheem ntawm dov, tsim khoom thiab sib dhos;Thaum lub sij hawm welding txheej txheem, vim qhov kev txwv ntawm qhov chaw nres tsheb vuam thiab lub arc ntaus phaj, ib tug loj stretch yog generated nyob rau hauv lub kawg ntawm weld stress;
Thaum lub arc txav mus rau lub davhlau ya nyob twg qhov chaw vuam thiab lub arc ntaus phaj, vim yog thermal expansion thiab deformation ntawm qhov no, lub transverse tensile kev nyuaj siab ntawm weld davhlau ya nyob twg yog so, thiab lub binding quab yuam yog txo, thiaj li hais tias lub weld hlau cia li. solidified ntawm lub weld davhlau ya nyob twg Lub davhlau ya nyob twg tawg yog tsim los ntawm ib tug loj tensile kev nyuaj siab.
Raws li kev txheeb xyuas ntawm cov laj thawj saum toj no, ob qho kev tawm tsam tau npaj tseg:
Ib qho yog ua kom qhov dav ntawm arc ntaus phaj kom nws txoj hlua khi;
Qhov thib ob yog siv slotted elastic restraint arc ntaus phaj.
Txawm li cas los xij, tom qab siv cov kev ntsuas saum toj no hauv kev xyaum, qhov teeb meem tsis tau daws tau zoo:
Piv txwv li, txawm hais tias lub elastic restraint arc ntaus phaj yog siv, lub davhlau ya nyob twg tawg ntawm lub longitudinal weld tseem yuav tshwm sim, thiab lub davhlau ya nyob twg tawg feem ntau tshwm sim thaum vuam lub tog raj kheej nrog me me thickness, tsis tshua muaj rigidity thiab yuam los ua ke;
Txawm li cas los xij, thaum muaj cov khoom kuaj phaj nyob rau hauv qhov txuas txuas ntawm qhov ntev ntawm lub tog raj kheej, txawm hais tias qhov vuam vuam thiab lwm yam kev mob zoo ib yam li thaum tsis muaj cov khoom kuaj phaj, muaj ob peb lub davhlau ya nyob twg cov kab nrib pleb nyob rau hauv qhov ntev seam.
Tom qab rov kuaj thiab tshuaj xyuas, nws pom tau tias qhov tshwm sim ntawm cov kab nrib pleb ntawm qhov kawg ntawm txoj kab ntev seam tsis yog tsuas yog cuam tshuam rau qhov tsis muaj kev ntxhov siab loj tensile kawg ntawm qhov kawg weld, tab sis kuj muaj feem xyuam rau ob peb lwm yam tseem ceeb heev.
Ua ntej.Kev tshuaj xyuas ntawm qhov ua rau lub davhlau ya nyob twg tawg
1. Kev hloov pauv ntawm qhov kub thiab txias ntawm lub davhlau ya nyob twg weld
Thaum lub sij hawm arc vuam, thaum lub vuam kub qhov chaw nyob ze rau qhov kawg ntawm lub longitudinal weld, qhov kub thiab txias ntawm qhov kawg ntawm qhov vuam yuav hloov, thiab qhov ze rau qhov kawg, qhov kev hloov pauv ntau dua.
Vim tias qhov loj ntawm arc ntaus phaj yog me dua li ntawm lub tog raj kheej, nws lub peev xwm kub kuj tseem me dua, thiab kev sib txuas ntawm arc ntaus phaj thiab lub tog raj kheej tsuas yog los ntawm tack vuam, yog li nws tuaj yeem suav tias yog feem ntau tsis txuas ntxiv. .
Yog li ntawd, lub tshav kub hloov pauv ntawm lub davhlau ya nyob twg weld yog qhov tsis zoo, ua rau qhov kub thiab txias hauv zos nce, cov duab ntawm lub pas dej molten hloov, thiab qhov nkag mus rau qhov tob kuj tseem nce ntxiv.Lub solidification ceev ntawm lub pas dej molten qeeb, tshwj xeeb tshaj yog thaum qhov loj ntawm arc ntaus phaj yog me me, thiab tack weld ntawm arc ntaus phaj thiab lub tog raj kheej yog luv dhau thiab nyias.
2. Kev cuam tshuam ntawm vuam cua sov input
Txij li thaum vuam cov khoom siv hluav taws xob siv nyob rau hauv submerged arc vuam feem ntau loj dua li lwm txoj kev vuam, qhov nkag mus tob yog qhov loj, qhov nyiaj ntawm cov hlau tso tawm yog loj, thiab nws tau them los ntawm cov txheej flux, yog li lub pas dej molten loj thiab solidification ceev ntawm lub pas dej molten yog loj.Qhov txias txias ntawm vuam seam thiab vuam seam yog qeeb dua lwm txoj kev vuam, ua rau cov nplej coarser thiab sib cais hnyav dua, uas tsim cov kev mob zoo heev rau cov cim kub kub.
Tsis tas li ntawd, lub lateral shrinkage ntawm lub vuam yog ntau me dua qhov qhib qhov sib txawv, yog li ntawd lub lateral tensile quab yuam ntawm lub davhlau ya nyob twg yog loj dua li ntawm lwm txoj kev vuam.Qhov no yog tshwj xeeb tshaj yog muaj tseeb rau beveled nruab nrab-tuab daim hlau thiab non-beveled thinner daim hlau.
3. Lwm yam xwm txheej
Yog tias muaj kev sib dhos yuam kev, kev sib dhos zoo tsis ua raws li qhov yuav tsum tau ua, cov ntsiab lus ntawm impurities xws li S thiab P hauv lub hauv paus hlau yog siab dhau thiab kev sib cais kuj yuav ua rau tawg.
Thib ob, qhov xwm txheej ntawm lub davhlau ya nyob twg tawg
Terminal tawg yog cov thermal tawg raws li lawv qhov xwm txheej, thiab cov kab nrib pleb thermal tuaj yeem muab faib ua crystallization cov kab nrib pleb thiab sub-kheej theem tawg raws li theem ntawm lawv tsim.Txawm hais tias qhov chaw ntawm lub davhlau ya nyob twg tawg yog qee zaum lub davhlau ya nyob twg, qee zaum nws nyob hauv 150mm los ntawm thaj chaw ncig ntawm lub davhlau ya nyob twg, qee zaum nws yog qhov tawg, thiab qee zaum nws yog qhov tawg sab hauv, thiab feem ntau ntawm cov xwm txheej yog cov kab nrib pleb sab hauv. tshwm sim nyob ib ncig ntawm lub davhlau ya nyob twg.
Nws tuaj yeem pom tau tias qhov xwm txheej ntawm lub davhlau ya nyob twg tawg yog qhov tseem ceeb ntawm cov txheej txheem tawg, uas yog, thaum lub vuam davhlau ya nyob twg tseem nyob hauv lub xeev ua kua, txawm hais tias lub pas dej molten ze ntawm lub davhlau ya nyob twg tau solidified, nws tseem yog nyob rau ntawm ib qho dej. qhov kub thiab txias me ntsis hauv qab cov kab solidus Zero-lub zog lub xeev, cov kab nrib pleb yog tsim nyob rau hauv qhov kev txiav txim ntawm txoj kev vuam kev nyuaj siab (feem ntau tensile stress) ntawm lub davhlau ya nyob twg,
Cov txheej saum npoo ntawm cov weld nyob ze ntawm qhov chaw yog yooj yim rau dissipate tshav kub, qhov kub thiab txias yog tsawg, thiab nws twb muaj ib tug tej yam lub zog thiab zoo heev plasticity, yog li ntawd lub davhlau ya nyob twg tawg feem ntau muaj nyob rau hauv lub weld thiab nrhiav tsis tau ntawm qhov muag liab qab.
Peb.Kev ntsuas los tiv thaiv qhov tawg ntawm lub davhlau ya nyob twg
Los ntawm cov kev soj ntsuam saum toj no ntawm qhov ua rau ntawm qhov tawg ntawm lub davhlau ya nyob twg, nws tuaj yeem pom tau tias qhov tseem ceeb tshaj plaws kev ntsuas kom kov yeej cov kab nrib pleb ntawm submerged arc vuam longitudinal seams yog:
1. Tsim nyog nce qhov loj ntawm arc ntaus phaj
Cov neeg feem ntau tsis paub txaus txog qhov tseem ceeb ntawm arc ntaus phaj, xav tias qhov kev ua haujlwm ntawm arc ntaus phaj tsuas yog coj lub arc crater tawm ntawm qhov vuam thaum lub arc raug kaw.Yuav kom txuag tau hlau, qee qhov arc strikers tau ua me me thiab dhau los ua "arc strikers".Cov kev coj ua no yuam kev heev.Lub arc ntaus phaj muaj plaub txoj haujlwm:
(1) Ua rau qhov tawg ntawm qhov vuam thaum lub arc pib thiab lub arc crater thaum lub arc nres mus rau sab nraud ntawm qhov vuam.
(2) Ua kom muaj zog ntawm qhov kev txwv ntawm qhov kawg ntawm qhov ntev ntawm lub seam, thiab dais qhov loj tensile kev nyuaj siab generated ntawm lub davhlau ya nyob twg.
(3) Txhim kho qhov kub thiab txias ntawm lub davhlau ya nyob twg, uas yog qhov tsim nyog rau kev siv hluav taws xob thiab tsis ua rau qhov kub ntawm lub davhlau ya nyob twg siab dhau.
(4) Txhim kho qhov sib nqus sib nqus ntawm lub davhlau ya nyob twg thiab txo qhov degree ntawm magnetic deflection.
Yuav kom ua tiav plaub lub hom phiaj saum toj no, lub arc ntaus phaj yuav tsum muaj qhov loj txaus, lub thickness yuav tsum zoo ib yam li cov vuam, thiab qhov loj yuav tsum nyob ntawm qhov loj ntawm qhov vuam thiab thickness ntawm cov hlau phaj.Rau cov hlab ntsha dav dav, nws raug pom zoo tias qhov ntev thiab qhov dav yuav tsum tsis pub tsawg dua 140mm.
2. Ua tib zoo saib xyuas qhov sib dhos thiab tack vuam ntawm arc ntaus phaj
Lub tack welding ntawm arc ntaus phaj thiab lub tog raj kheej yuav tsum muaj qhov ntev thiab tuab txaus.Feem ntau hais lus, qhov ntev thiab tuab ntawm tack weld yuav tsum tsis pub tsawg tshaj 80% ntawm qhov dav thiab tuab ntawm arc ntaus phaj, thiab yuav tsum tau txuas txuas ntxiv.Nws tsis tuaj yeem tsuas yog "qhov chaw" welded.Nyob rau ntawm ob sab ntawm txoj hlua ntev, lub thickness ntawm weld txaus yuav tsum tau ua kom ntseeg tau rau cov phaj nruab nrab thiab tuab, thiab qee qhov zawj yuav tsum qhib yog tias tsim nyog.
3. Ua tib zoo saib xyuas qhov chaw vuam ntawm lub davhlau ya nyob twg ntawm lub tog raj kheej
Thaum lub sij hawm tack welding tom qab lub tog raj kheej yog sib npaug, thiaj li yuav ua rau kom cov degree ntawm restraint nyob rau hauv lub kawg ntawm lub longitudinal seam, qhov ntev ntawm lub tack weld nyob rau hauv lub kawg ntawm lub longitudinal seam yuav tsum tsis txhob tsawg tshaj li 100 hli, thiab yuav tsum muaj. txaus thickness ntawm cov weld, thiab yuav tsum tsis txhob muaj cov kab nrib pleb, Defects xws li tsis muaj fusion.
4. nruj me ntsis tswj cov vuam cua sov input
Thaum lub sij hawm welding txheej txheem ntawm cov hlab ntsha siab, lub vuam cua sov input yuav tsum nruj me ntsis tswj.Qhov no tsis yog tsuas yog los xyuas kom meej cov khoom siv ntawm cov welded pob qij txha, tab sis kuj plays lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov kab nrib pleb.Qhov loj ntawm lub submerged arc vuam vuam tam sim no muaj kev cuam tshuam zoo rau qhov rhiab heev ntawm lub davhlau ya nyob twg tawg, vim hais tias qhov loj ntawm vuam tam sim no ncaj qha cuam tshuam rau qhov kub thiab txias thiab vuam cua sov input.
5. nruj me ntsis tswj cov duab ntawm molten pas dej ua ke thiab weld zoo coefficient
Cov duab thiab daim ntawv ntawm cov pas dej ua ke nyob rau hauv submerged arc vuam yog ze ze rau qhov cuam tshuam rau vuam tawg.Yog li ntawd, qhov loj, cov duab thiab daim ntawv ntawm lub pas dej ua ke yuav tsum tau tswj nruj me ntsis.
Plaub.Xaus
Nws yog ib qho tsim nyog los tsim longitudinal seam davhlau ya nyob twg tawg thaum submerged arc welding yog siv los weld longitudinal seam ntawm lub tog raj kheej, thiab nws tsis tau zoo daws tau ntau xyoo.Los ntawm kev ntsuam xyuas thiab kev tsom xam, lub ntsiab yog vim li cas rau cov kab nrib pleb nyob rau hauv qhov kawg ntawm submerged arc vuam longitudinal seam yog qhov tshwm sim ntawm kev sib koom ua ke ntawm qhov loj tensile kev nyuaj siab thiab qhov tshwj xeeb kub teb nyob rau hauv qhov no.
Kev xyaum tau ua pov thawj tias kev ntsuas xws li tsim nyog nce qhov loj ntawm arc strike phaj, ntxiv dag zog rau kev tswj xyuas zoo ntawm tack welding, thiab nruj me ntsis tswj cov vuam cua sov input thiab cov duab ntawm cov weld tuaj yeem tiv thaiv qhov tshwm sim ntawm cov kab nrib pleb thaum kawg ntawm submerged. arc vuam.
Post lub sij hawm: Mar-01-2023
