1. Ua ntej- Weld: Cov Khoom Siv & Kev Npaj Ua Haujlwm Zoo (Cov kauj ruam tseem ceeb)
nruj me ntsis phim huab cua vuam cov ntaub ntawv: Siv GB txheem huab cua huab cua hlau vuam hlau / electrodes (tsis muaj cov khoom siv hlau zoo tib yam), xws li MMA electrodeE5015-G, MIG/TIG wireER50-G, submerged arc vuam hlauH08Mn2SiCuA+ flux SJ101; xyuas kom cov ntaub ntawv qhuav thiab tsis muaj xeb / roj (ci electrodes ntawm 300 ~ 350℃rau 1 ~ 2h yog damp).
Precise deg tu: Tshem cov roj, roj, xeb, nplai thiab pleev xim los ntawm10 ~ 20mm ntawm ob sab ntawm qhov sib koom ua kentawm sandblasting, hlau txhuam los yog acetone degreasing; xyuas kom qhov chaw yog qhuav (qhib<0.05%) to avoid hydrogen-induced porosity and cold cracking.
Tsim nyog sib koom tsim: Txais kev yooj yim, huab cua- cov ntaub ntawv sib koom ua ke (lub taub qab, ceg tawv, fillet weld) nrog kev hloov pauv; zam cov pob qij txha kaw (yooj yim rau ntxiab dej / cua) thiab xyuas kom cov pob qij txha muaj cov dej ntws; qhov weld zawj loj raws li GB / T 985 tus qauv (cov phaj thickness sib piv).
Environmental & equipment check: Weld tsuas yog nyob rau hauv ib puag ncig qhuav (humidity Tsawg dua los yog sib npaug li 80%), tsis muaj nag / daus / cua ncaj qha tshuab (siv vuam tsev pheeb suab rau ntawm - qhov chaw tsim kho); calibrate vuam cov cuab yeej (tam sim no, voltage, xaim pub ceev) ua ntej kom ruaj khov ua haujlwm.
2. Vuam txheej txheem: Precise Parameter & Operation Control (Core Step)
Classified heat input control (los ntawm phaj thickness): Cov tub ntxhais kom tsis txhob weld cheeb tsam softening, grain coarsening thiab deformation; nruj me ntsis raws li cov hauv paus ntsiab lus uas tsis muaj cua sov:
Nyias daim hlau (3 ~ 12mm): TIG / MIG / laser vuam, tam sim no 80 ~ 150A, voltage 18 ~ 28V, ceev mus txawv tebchaws ceev (5 ~ 10cm / min), ib zaug - hla vuam (tsis muaj ntau- hla dhau cua sov).
Cov phaj nruab nrab / hnyav (14 ~ 100mm): Preheat cov khoom hauv paus rau80 ~ 150 degree(interpass kub Tsawg dua lossis sib npaug li 250 degree); siv me me -inch electrodes/wires (2.5 ~ 4.0mm), multi- hla vuam (txhua qhov hla vuam hlaws nyias), thiab tswj ib leeg- kis cov cua kub tawm tsawg dua lossis sib npaug li 15kJ / cm; MMA vuam tam sim no 100 ~ 220A, submerged arc vuam tam sim no 300 ~ 500A.
Txheem vuam kev ua haujlwm: Txais ncaj-kab lossis me ntsis oscillating vuam (tsis muaj qhov loj amplitude oscillation); xyuas kom tag nrho weld nkag mus (tsis tiav fusion / nkag); tshem tawm welding slag thiab spatter tom qab txhua qhov hla (rau ntau- hla vuam) kom tsis txhob muaj kev sib koom ua ke hauv qhov dhau los.
Tsis txhob ncua ntev - lub sijhawm vuam: Rau cov phaj hnyav, siv cov vuam sib txuas kom txo tau cov cua sov thiab cov seem seem; qhov vuam kev taw qhia zoo ib yam kom tsis txhob muaj kev ntxhov siab tsis sib xws.
3. Tshaj tawm -Weld: Kev Kho Mob Sijhawm & Kev Tswj Kev Nyuaj Siab (Garantee Step)
Kev kho qhov chaw tam sim ntawd: Sib tsoo weld seams, tshav kub- thaj chaw cuam tshuam (HAZ) thiab txiav cov npoo kom tshem tawm cov pob zeb, burrs, undercutting thiab slag; ua kom cov npoo npoo du (tsis muaj qhov ntse ntse) txhawm rau tshem tawm cov ntsiab lus pib corrosion; passivate thaj tsam weld nrog cov tshuaj uas tsis yog -chromate passivation tov, los yog txhuam cov pob tshab pob tshab weathering sealer (ib ntus tiv thaiv rau thawj zaug oxidation).
Rational residual stress nyem: Tsis muaj siab -kub kev kho cua sov (Ntau dua lossis sib npaug ntawm 600 degree, yuav rhuav tshem cov hlau microstructure); tsuas yog rau cov phaj hnyav (Ntau dua lossis sib npaug li 50mm) nrog cov pob qij txha loj, txais yuavlow-kub kev ntxhov siab(150 ~ 200℃rau 1 ~ 2h) los yog txhua yam kev co kev ntxhov siab nyem; zam qhov txias txias ntawm thaj tsam weld (naturally txias rau chav sov hauv huab cua, tsis muaj dej txias).
Anti- tiv thaiv corrosion rau cov welds tshiab: Rau vuam nyob rau hauv ntug dej hiav txwv / ntsev- tshuaj tsuag / kev lag luam ib puag ncig, ntxuav lub weld cheeb tsam nrog cua qhuav tam sim ntawd tom qab vuam, thiab siv ib ntus los tiv thaiv- xeb tus neeg saib xyuas los tiv thaiv ntsev pos huab / kua qaub corrosion ua ntej patina tsim.
4. Weld Quality Inspection: Multi-Kev Ntsuas Qhov Ntsuas (Qhov Kawg)
Kev kuaj pom pom (100% yuav tsum tau): Check weld appearance for no visible defects (porosity, inclusions, cracks, incomplete penetration, undercutting >0.5 hli); weld hlaws yog ib yam, thiab qhov loj me me (qhov siab, ceg ntev) ua tau raws li cov qauv tsim.
Tsis yog-kev kuaj kev puas tsuaj (rau kev thauj khoom-cov kabmob cov kabmob): UT (ultrasonic testing) rau qhov tsis xws luag sab hauv (tsis muaj cov kab nrib pleb sab hauv / suav nrog); MT (sib nqus particle kuaj) rau saum npoo / ze - deg defects (rau cov phaj tuab / vuam pob qij txha nyob rau hauv dynamic loads); Kev ntsuas kev pov hwm ntau dua lossis sib npaug li 20% rau cov khoom siv dav dav, 100% rau cov khoom tseem ceeb-cov kabmob.
Mechanical performance sampling soj ntsuam (batch): Rau kev tsim khoom loj, piv txwv cov pob qij txha los kuaj lub zog tensile, lub zog tawm los thiab qis - qhov kub thiab txias cuam tshuam (KV Ntau dua lossis sib npaug ntawm 27J ntawm -20 degree); xyuas kom cov weld sib koom ua ke txhua yam khoom tsis yog qis dua 90% ntawm cov khoom siv hauv paus.
Corrosion resistance verification (yeem): Rau siab -xav tau tej yaam num, ua ib tug nruab nrab ntsev tshuaj tsuag rau ntawm weld cheeb tsam; tus nqi corrosion yuav tsum ua raws li cov khoom siv hauv paus (tsis muaj qhov pom tseeb nrawm nrawm).
