Vuam thiab tsim cov txheej txheem tuaj yeem qhia txog qhov tsis xws luag hauv S355K2W Corten Steel-xws li microcracks hauv weld seams, tsis tiav fusion, lossis nto tawg los ntawm kev sib sau ntau dhau. Cov teeb meem no feem ntau pom tsis pom ntawm qhov muag liab qab tab sis tuaj yeem txo cov hlau -40℃toughness thiab kev ncaj ncees, ua rau muaj kev puas tsuaj loj hauv qis- kub lossis huab cua- qhov chaw raug. Rau cov neeg tsim khoom thiab cov neeg soj ntsuam zoo, cov lus nug tseem ceeb tshwm sim: Cov kev kuaj tsis yog kev puas tsuaj (NDT) zoo tshaj plaws rau kev tshuaj xyuas S355K2W tom qab vuam thiab tsim? Cov ntsiab lus xaus, hauv paus hauv EN NDT cov qauv thiab kev ua lag luam, yog qhov tseeb:Sib Nqus Particle Testing (MPT), Ultrasonic Testing (UT), thiab Visual Testing (VT) yog thawj txoj hauv kev zoo- nrog Penetrant Testing (PT) ua ib qho ntxiv- xaiv raws li hom tsis xws luag (nto vs sab hauv) thiab txheej txheem (welding vs forming). Hauv qab no yog ib qho yooj yim, ua tiav kev tawg.
Cov ntsiab lus tseem ceeb: Vim li cas Lub Hom Phiaj NDT Teeb Meem rau S355K2W
S355K2W cov txiaj ntsig tseem ceeb- qis- qhov kub thiab txias (-40 degree, Ntau dua lossis sib npaug rau 27J) thiab huab cua tsis kam- tau yooj yim cuam tshuam los ntawm kev ua haujlwm tsis zoo tom qab. Tsis zoo li kev kuaj kev puas tsuaj (uas ua rau cov khoom puas tsuaj), NDT tso cai rau kev soj ntsuam zoo thaum khaws cov hlau ua haujlwm. Qhov tseem ceeb yog kom phim NDT txoj hauv kev rau qhov tsis xws luag ntawm txhua tus txheej txheem:
Tshaj tawm -Vuam Risks: Internal defects (tsis tiav fusion, porosity, weld cag tawg) thiab nto / ze ntawm - nto tawg nyob rau hauv lub tshav kub - cuam tshuam cheeb tsam (HAZ).
Tshaj tawm -Txoj kev pheej hmoo: Surface microcracks (los ntawm qhov txias deformation ntau dhau los yog tsis tsim nyog ua kom txias txias) thiab zais deformation -induced stress concentrations.
Cov Txheej Txheem Tseem Ceeb NDT: Daim Ntawv Thov & Cov Ntsiab Cai
Txoj kev NDT ua tau zoo tshaj plaws rau S355K2W lub hom phiaj tshwj xeeb tsis xws luag thiab cov yam ntxwv ntawm cov txheej txheem. Hauv qab no yog cov qauv kev lag luam kub, nrog cov lus qhia meej ntawm kev siv:
1. Sib Nqus Particle Testing (MPT): Qhov zoo tshaj plaws rau Nto/Zoo-Ntoo Cracks (Post-Vuam & Tsim)
Core Application: Tshawb xyuas qhov chaw thiab nyob ze - cov kab nrib pleb (tsawg dua lossis sib npaug li 6 hli sib sib zog nqus) hauv cov vuam seams, HAZ, thiab cov khoom tsim tawm - zoo tagnrho rau ob qho tib si ncej- vuam thiab ncej- kev tshuaj xyuas.
Basic Principple: Magnetizes cov hlau; Qhov tsis xws luag (kawg) distort lub magnetic teb, attracting magnetic particles (qhuav los yog ntub dej) los tsim cov kev qhia pom.
Cov ntsiab lus tseem ceeb: ① Ua kom lub ntsej muag huv si (tshem tawm xeb, pleev xim, roj) kom tsis txhob npog qhov tsis xws luag; ② Siv alternating tam sim no (AC) rau saum npoo tawg los yog tam sim no ncaj qha (DC) rau ze rau - deg defects; ③ Ua raws li EN ISO 9934 cov qauv rau kev sib nqus hlau nplaum thiab kev xaiv particle.
2. Ultrasonic Testing (UT): Qhov zoo tshaj plaws rau cov teeb meem sab hauv (Post-Vuam)
Core Application: Identifies internal defects in welds (incomplete fusion, porosity, internal cracks) and thick formed plates (>25mm) - tseem ceeb rau kev tshaj tawm - vuam kev tshuaj xyuas ntawm cov khoom thauj -cov kabmob.
Basic Principple: Transmits siab - zaus ultrasonic nthwv dej los ntawm cov hlau; nthwv dej muaj kev cuam tshuam sab hauv qhov tsis xws luag, tsim cov teeb liab uas qhia qhov tsis xws luag thiab qhov chaw.
Cov ntsiab lus tseem ceeb: ① Siv lub ntsuas ntsuas ntsuas ntsuas (piv txwv li, IIW thaiv) los teeb tsa cov khoom siv; ② Siv tus neeg sawv cev sib txuas (glycerin lossis dej-raws li gel) kom ntseeg tau tias muaj suab nrov; ③ Ua raws li EN ISO 16810 rau kev soj ntsuam vuam tsis.
3. Visual Testing (VT): Foundational Pre- & Post-Inspection (Tag nrho cov txheej txheem)
Core Application: Ib qho yuav tsum tau ua thawj kauj ruam rau kev tshaj tawm - vuam thiab xa tawm - kev soj ntsuam xyuas - kuaj pom qhov tsis xws luag (cov kab nrib pleb loj, weld spatter, deformation, nto khawb) thiab txheeb xyuas qhov chaw npaj rau lwm txoj hauv kev NDT.
Basic Principple: Kev tshuaj xyuas qhov muag nrog qhov muag liab qab los yog kev pab (pob tshab iav, borescope rau nyuaj- mus rau - mus txog thaj chaw).
Cov ntsiab lus tseem ceeb: ① Xyuas kom muaj teeb pom kev zoo (Ntau dua lossis sib npaug ntawm 500 lux) thiab nkag mus rau txhua qhov chaw; ② Cov ntaub ntawv tsis xws luag nrog cov duab thiab ntsuas; ③ Ua raws li EN ISO 9712 rau cov neeg soj ntsuam kev tsim nyog.
4. Penetrant Testing (PT): Ntxiv rau Cov Tsis-Magnetic Surfaces (Post-Forming)
Core Application: Ib qho ntxiv rau MPT, siv rau cov kab nrib pleb ntawm qhov tsis yog - cov khoom sib nqus (piv txwv li, yog S355K2W yog coated ua ntej kuaj) lossis rau kev txheeb xyuas qhov xav tau ntawm qhov chaw tsis xws luag tom qab- tsim.
Basic Principple: Siv cov xim pleev xim uas nkag mus rau hauv cov kab nrib pleb; Kev nkag siab ntau dhau raug tshem tawm, thiab tus tsim tawm rub tawm qhov nkag mus, ua kom pom cov kab nrib pleb.
Cov ntsiab lus tseem ceeb: ① Xyuas kom huv huv thiab ziab ntawm qhov chaw ua ntej thov; ② Ua raws EN ISO 3452 rau kev xaiv penetrant thiab tswj cov txheej txheem.
Kev Ntsuas Lub Sijhawm & Cov Lus Qhia Ua Ntej
Txhawm rau txhim kho kev tshuaj xyuas kom zoo thiab kev kuaj pom qhov tsis xws luag, ua raws li qhov tseem ceeb hauv qab no:
Ncej -Vuam: Thawj VT (xyuas pom qhov tsis xws luag thiab kev npaj nto) → tom qab ntawd MPT (nto / ze ntawm -sov weld tawg) → kawg UT (sab hauv weld defects) rau cov khoom tseem ceeb.
Ncej -Forming: Thawj VT (xyuas deformation thiab pom khawb) → tom qab ntawd MPT (sov microcracks los ntawm kev sib sau) → PT (yog tias coated lossis tsis yog- cov hlau nplaum muaj nyob).
Kev lees txais zaum kawg: Muaj VT + MPT (cov cheeb tsam tseem ceeb) kom paub meej tias tsis muaj qhov cuam tshuam tshiab raug qhia thaum tuav lossis khaws cia.
