Kev ceev faj ER70S-6

ER70S-6 welding hlau yog cov roj carbon tsawg-carbon steel shielded vuam hlau uas ua tau raws li AWS A5.18 cov qauv thiab muaj cov txheej txheem vuam zoo heev thiab cov khoom siv kho tshuab. Nws cov tshuaj lom neeg muaj pes tsawg leeg (C 0.06-0.15%, Mn 1.40-1.85%, Si 0.80-1.15%) ua kom muaj kev ruaj ntseg thiab vuam zoo thaum vuam, ua rau nws siv dav hauv ntau yam steel qauv vuam cov haujlwm.

Cov khoom siv zoo heev: Lub zog tensile Ntau dua lossis sib npaug ntawm 480 MPa, lub zog tawm los Ntau dua lossis sib npaug ntawm 400 MPa, elongation Ntau dua lossis sib npaug li 22%, cuam tshuam lub zog Ntau dua lossis sib npaug rau 27 J ntawm -30 degree, kom ntseeg tau tias weld toughness thiab tawg tsis kam.
Cov txheej txheem vuam zoo heev: ruaj khov arc, me me spatter, thiab zoo nkauj pleasing weld tiav. Nrog rau 1.2 hli hlau ntsuas thiab 180A tam sim no, spatter yog txo los ntawm kwv yees li 30% piv rau cov pa hlau, txhim kho qhov chaw ua haujlwm zoo.
Dav siv tau ntau yam tam sim no: Pom zoo tam sim no rau 0.8 hli ntsuas yog 50-100A, thiab rau 1.2 hli ntsuas yog 80-350A, ua tau raws li qhov xav tau ntawm vuam xav tau ntawm workpieces sib txawv thicknesses.
Tsawg-hydrogen zog: Raws li kev lag luam sib txawv ntawm kev nce qib ntawm qis- hydrogen vuam hlau hauv cov tshuab hnyav los ntawm 2025, qhov no txo ​​qis kev pheej hmoo ntawm hydrogen-induced cracking nyob rau hauv welded pob qij txha.

Chemical Storage Tank Welding Project: Nyob rau hauv ib qhov loj chemical cia tank welding project, ER70S-6 vuam hlau tau siv rau ob qho tib si ntsug thiab kab rov tav vuam kev khiav hauj lwm, ua tau ib tug thawj-pass tus nqi ntawm ntau tshaj 98%, ua tau raws li lub zog yuav tsum tau nyob rau hauv ib tug corrosive ib puag ncig.
Choj Steel Structure Vuam: Hauv kev sib txuas ntawm cov qauv hlau ntawm hiav txwv- hla choj, 1.2mm ER70S-6 vuam hlau tau siv, ua ke nrog 80% Ar + 20% CO₂ sib xyaw roj tiv thaiv, nce vuam efficiency los ntawm 25% thiab ua tiav cov kev cuam tshuam zoo heev.
Siab Pipeline Vuam: Nyob rau hauv qhov ntev -ntaus roj pipeline vuam qhov project, optimizing lub ER70S-6 hlau lub qhuav stickout ntev (15-20mm) thiab roj ntws tus nqi (18-25L / min) zoo tswj porosity tsis xws luag, xyuas kom meej weld zoo raws li API 5L qauv.

Qhuav-tawm Length Control: Qhov pom zoo kom qhuav- tawm ntev yog 10-15 npaug ntawm txoj kab uas hla. Piv txwv li, rau 1.2mm hlau, khaws cia ntawm 12-18mm. Qhov ntev luv dhau tuaj yeem ua rau muaj kev sib tsoo ntxiv, thaum qhov ntev ntev tuaj yeem ua rau arc instability.
Gas Flow Adjustment: Qhov pom zoo txaus txaus rau cov pa ntshiab CO₂ roj yog 15-25 L / min, thiab rau Ar + CO₂ sib xyaw roj, 20-30 L / min. Kev tiv thaiv cua yuav tsum tau ua thaum cua ceev tshaj 2 m / s.
Tam sim no thiab Voltage Matching: Rau 0.8mm hlau, qhov pom zoo voltage yog 18-20V ntawm 80A, thiab rau 1.2mm hlau, qhov pom zoo voltage yog 24-26V ntawm 200A kom ruaj khov arc combustion.
Groove Cleaning: Ua ntej vuam, tshem cov roj, xeb, thiab noo noo nyob rau hauv 20mm ntawm ob sab ntawm qhov zawj kom tsis txhob tsim cov pores thiab inclusions.

Vuam xaim cia: Khaws rau hauv qhov chaw qhuav, qhov cua kom tsis txhob ya raws. Tsis tau qhib, tsis siv cov hlau yuav tsum tau muab kaw kom tsis txhob muaj qhov nqus dej uas tuaj yeem cuam tshuam qhov vuam zoo.
Nozzle tu: Tsis tu ncua ntxuav tawm ntawm lub nozzle thaum lub sij hawm vuam kom lub ntsej muag sib cuag kom meej thiab tiv thaiv arc tshuab.
Kev daws teeb meem:

• Porosity: Tshawb xyuas cov pa roj txaus, huv grooves, thiab txuas ntxiv kom raug.
• Tshaj tawm ntau dhau: Txo qhov tam sim no lossis nce qhov hluav taws xob kom tsim nyog, thiab tshawb xyuas qhov kev sib cuag.
• Tsis zoo weld tsim: Kho vuam ceev thiab oscillation amplitude los xyuas kom meej txaus fusion ntawm lub weld pas dej ua ke.

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