Rust, ib daim txheej uas muaj ntawm cov corrosion uas tsim ntawm cov hlau tawg nrog oxygen thiab noo noo, yog ib qho kev paub zoo rau cov khoom qub, cov khoom siv hlau, thiab sab nraum zoov. Rau cov uas ntsib txoj haujlwm ntawm kev koom nrog Rusted hlau, ib lo lus nug tseem ceeb tshwm sim: "Puas tuaj yeem muab cov hlau rusted?" Cov lus teb luv yog - Rusted hlau tuaj yeem welded- Tab sis ras ua kom ntseeg tau tias muaj zog, txhim khu kev qha weld muaj zog. Yog tsis muaj kev npaj kom tsim nyog thiab cov txheej txheem, xeb tuaj yeem ua rau cov pob qij txha tsis muaj zog, qhov tsis xws luag, thiab txawm tias muaj kev nyab xeeb nyab xeeb.
Yog vim li cas xeb ua tiav vuam
Rust (feem ntau hlau oxide) tsis yog hlau - nws yog cov tshuaj pleev ib ce uas cuam tshuam cov vuam taug kev hauv ntau txoj kev:
Hluav Taws Xob Hluav Taws Xob
Vuam relies ntawm hluav taws xob los tsim ib qho arc (hauv arc vuam) lossis tsim cov cua sov (hauv vuam kub). Rust yog ib tug neeg xyuas kev coj ua tsis zoo, yog li nws tuaj yeem thaiv lossis tawg cov hluav taws xob hluav taws xob tam sim no yuav tsum tau tsim ib qho chaw ruaj khov. Qhov tsis muaj peev xwm ua rau lub pas dej weld, ua rau nws nyuaj rau yaj lub hauv paus hniav dua. Piv txwv li, hauv vuam vuam, xeb ntawm cov hlau nto yuav ua rau lub arc rau "dhia" lossis tua tsis tau muaj qhov tsis tiav ntawm Weld thiab cov hlau hauv paus.
Kev tsis huv ntawm lub pas weld
Thaum rhuab thaum lub sij hawm vuam, xeb tsoo rau hauv oxygen thiab lwm yam roj, uas tuaj yeem paug weld pas dej. Qhov no ua rau porosity -} me ntsis roj npuas daig hauv cov ruaj khov Weld. Porosity tsis muaj zog tiv thaiv weld los ntawm kev tsim qhov khoob ntawm nws cov qauv, txo cov zog tensile thiab ua kom sib koom ua ke kom tawg hauv lub nra. Ib weld ntawm cov hlau roj hnyav yuav muaj qhov hws pom ntawm nws cov nplaim dej, kos npe kom meej ntawm kev paug.
Txo cov fusion fusion
Xeb ua raws li kev thaiv ntawm lub hauv paus hlau thiab Weld. Txawm hais tias arc melts tus xeb, cov hlau hauv qab yuav tsis ncav cuag qhov ntsuas kub uas yuav tsum tau fuse nrog weld hlau. Qhov no ua rau tsis tiav Fusion- qhov tsis zoo rau qhov chaw weld tsis ua raws li cov hlau hauv paus. Thaum muaj mob hnyav, lub weld yuav tev tawm ntawm cov chaw xeb nrog qhov tsawg heev, txhais tau hais tias nws tau ua rau fued.
Nce nti thiab swb
Rust hais nyob rau hauv lub pas dej weld tuaj yeem ua rau cov tee dej weld ntau dhau lawm (molten cov hlau tee uas ya tawm ntawm weld) thiab ua rau cov txheej txheem ntawm cov electrodes) nyuaj rau tshem tawm. Lub ntsej muag tsim lub messy weld thiab tej zaum yuav ua rau cov chaw sib ze, thaum swb rau hauv Weld (swb rau kev sib koom ua ke.
Thaum xeb hlau tuaj yeem welded (thiab li cas)
Txawm hais tias cov kev sib tw no, xeb hlau tuaj yeem welded ua tiav nrog txoj kev npaj thiab kho kom haum. Qhov tseem ceeb yog tshem tawm txaus xeb kom tso cai rau kev lom zem thaum yoog cov txheej txheem vuam los lis cov khoom seem.
Kev npaj: tshem cov xeb ua ntej vuam
Cov kauj ruam tseem ceeb tshaj plaws yog ntxuav cov hlau saum npoo kom tshem tawm xoob, flaky xeb thiab nthuav tawm cov hlau tshiab. Qhov kev ntxuav tu yog nyob ntawm qhov hnyav ntawm xeb:
• Lub teeb siav (ib txheej nyias nyias, txheej ua tau kom tshem tawm nrog cov hlau txhuam, xuab zeb, lossis xaim log txuas rau ib qho grinder. Qhov no nthuav tawm cov hlau hauv qab, tso cai rau Arc los tawm tsam thiab yaj lub hauv paus ntawm lub hauv paus kom huv.
• Hnyav cov xeb (tuab, cov txheej txheem crusty lossis pitting) yuav tsum tau tu ntau dua. Ib qho grinder nrog tus nrov plig plawg disc lossis lub pob zeb ci tuaj yeem tshem cov xeb sib sib zog nqus, txawm tias cov hlau sib sib zog nqus, tseem muaj xeb me me hauv lub pits. Hauv cov xwm txheej zoo li no, tsom rau kev tshem tawm tag nrho cov xoob xoob-}}}}} Cov xeb uas muaj xeb tsawg dua li flaky xeb ntawm cov npoo.
• Nplai lossis nruj sib dhos xeb (ib txheej tawv, ci ntsa iab) tej zaum yuav xav tau kev kho tshuaj lom neeg tshuaj lom neeg. Rusters conversers lossis acidic tshuaj ntxuav yuav yaj tus xeb, txawm hais tias cov hlau yuav tsum tau muab ntxhua kom huv si thiab qhuav tom qab los tiv thaiv tus xeb tshiab ntawm kev tsim ua ntej vuam.
Tom qab tu, so cov npoo nrog daim ntaub kom tshem cov hmoov av thiab cov khib nyiab. The goal is to expose at least ¼ inch of clean metal along the joint line-this ensures the weld can fuse directly with the base metal, not just the rust.
Xaiv txoj cai vuam thiab cov tsis muaj
Qee qhov chaw vuam kov cov xeb zoo dua li lwm tus, thiab kho kom haum tuaj yeem sib txuas ntxiv:
• Lo vuam (smws) yog qhov kev xaiv zoo rau xeb hlau, raws li nws cov txheej txheem flux, raws li nws cov khaub ncaws fluex Siv lub cellulosic electrode (piv txwv li, E6010 lossis E6011) tuaj yeem txhim kho arc nkag los ntawm lub teeb xeb, ua tsaug rau nws txhoj puab. Zam kev qes - hydrogen electrodes (piv txwv li, e7018) rau kev noo noo thiab paug, ua rau muaj kev pheej hmoo ntau.
• Mig vuam (GMAW) tuaj yeem ua haujlwm nrog lub teeb flux yog tias siv flux - cored hlau (uas muaj cov tshuaj tiv thaiv kab mob hauv cov xaim). Cov flux yuav pab tawm roj ntawm xeb, txo qhov porosity. Rau Mig nrog cov hlau tau zoo, kom cov hlau yog huv heev, raws li cov ntaub thaiv cov roj av (sib xyaw) muaj kev tiv thaiv tsawg dua li flux.
• Tig Vuam (Gtaw) yog qhov kev zam txim tsawg, raws li nws tso siab rau kev tswj tshav kub kub thiab tsis muaj qhov npog tsis huv. Nws tsuas yog pom zoo rau maj mam rusted hlau uas tau huv huv.
Kho cov tsis tau muaj peev xwm pab tau:
• Ua kom muaj kev phom sij me ntsis kom ntseeg tau tias lub hauv paus melts los ntawm ib qho xeb uas tseem tshuav.
• Siv qhov ntev me ntsis rau ACC ntev kom muaj arc ntawm qhov tsis sib xws, yav tas los muaj xeb.
• Weld ntawm qeeb qeeb kev mus ncig ua si kom tso pa tawm ntawm cov xeb ntawm Weld pas ua ntej nws ua tau zoo, txo qhov porosity.
Post -} Weld Saib Xyuas
Tom qab vuam, soj ntsuam weld rau tej yam tsis xws luag zoo li porosity lossis tsis tiav fusion. Yog tias muaj qhov tsis xws me me yog tam sim no, ib thib ob dhau nrog kev huv huv electrode tuaj yeem kho lawv. Rau sab nraum zoov lossis siab {{{2} noo noo} noo noo ntawm kev tsim kom muaj kev tiv thaiv tshiab los ntawm kev tsim cov hlau tiv thaiv kom tsis txhob muaj hlau.
Txwv: Thaum xeb hlau yuav tsum tsis txhob welded
Hauv qee kis, xeb kev puas tsuaj yog hnyav heev rau Weld yam xyuam xim lossis zoo:
• Cov qauv hluav taws xob tsis muaj zog los ntawm xeb: yog tias xeb tau noj qhov tseem ceeb ntawm cov hlau (piv txwv li cov nqaj hlau uas poob rau xeb), vuam yuav tsis kho nws lub zog. Cov hlau nws tus kheej yog qhov tsis muaj zog heev los txhawb nqa cov khoom thauj, txawm tias muaj zog weld.
• Pitting tob rau ntawm cov xeb uas zais: hlau nrog cov pits sib sib zog nqus tau nrog xeb yuav tshwm sim ntxuav sab saum toj uas yuav paug cov xeb uas yuav paug cov weld. Qhov no muaj ntau yam nyob rau hauv cov tsheb qub tsheb lossis cov khoom siv marine, qhov chaw nyob qhov twg xeb tau tob. Vuam xws li cov hlau feem ntau ua rau muaj ntxeem tau, welds tsis muaj zog.
• Kev nyab xeeb - Cov ntaub ntawv tseem ceeb: hauv cov kab ke vuam (piv txwv li cov kab ke, cov kabmob siab} siab} cov kabmob sib koom tes, txawm tias maj mam muab ntxuav kom huv. Ib qho kev pheej hmoo ntau xeb muaj kev cuam tshuam rau Weld Confinity, uas tuaj yeem ua rau kev puas tsuaj rau kev puas tsuaj.
Tiag - ntiaj teb piv txwv
Rusted hlau vuam yog ib txwm muaj nyob rau hauv kev kho ua haujlwm:
• Ib tug neeg ua liaj ua teb kho cov tsheb laij teb muaj xeb nws tau tom qab sib tsoo deb xoob, siv pas vuam los tsim kev sib koom ua ke.
• Tus tswv tsev kho lub laj kab muaj xeb muaj xeb nrog cov hlau txhuam nrog flux - cored hlau kom rov qab ib lub tsheb ciav hlau tawg.
• Cov kws tshaj lij xov tooj cua feem ntau weld rusted lub cev panels, txawm tias lawv yuav txiav tawm cov ntu kom hnyav thiab hloov lawv nrog cov hlau tshiab yog tias pitting yog sib sib zog nqus.
Hauv txhua kis, kev vam meej yog nyob ntawm kev tshem tawm cov xeb txaus los tso cai fusion thiab xaiv cov txheej txheem txoj cai rau txoj haujlwm.
Tag
Rusted hlau tuaj yeem welded, tab sis xeb tsim cov nyom tseem ceeb uas xav tau npaj thiab saib xyuas. Los ntawm kev tshem cov xoob xoob, siv cov txheej txheem vuam tsim nyog (zoo li lo vuam nrog flux- Cov khoom siv welders tuaj yeem tsim cov pob qij txha muaj zog nyob hauv cov hlau xeb. Txawm li cas los xij, cov hlau muaj xeb kom loj lossis cov qauv hluav taws xob tsis muaj zog yuav ua rau muaj kev nyab xeeb rau Weld tsis zoo.
Tus yuam sij takaway yog tias xeb tsis yog ib qho thaiv tsis muaj vuam - Tab sis nws yuav tsum muaj kev hwm. Nrog kom tu thiab cov txheej txheem ntse, txawm tias cov hlau xeb tuaj yeem koom nrog ua haujlwm, txhim khu kev qha Welds. Txawm hais tias yuav kho kho lossis cov ntaub thaiv kev kho kom zoo, daws xeb kom zoo ua kom tau lub sijhawm weld yuav sawv ntsug ntawm lub sijhawm.
