Galvanized steel kauj yog cov khoom siv hlau tseem ceeb siv hauv kev ua haujlwm siab, dav siv hauv kev tsim kho, tsheb, thiab khoom siv hauv tsev. Nws qhov zoo cuam tshuam ncaj qha rau kev ua haujlwm thiab kev ua neej nyob ntawm cov khoom lag luam downstream.Yuav kom ntseeg tau tias galvanized steel coils ua tau raws li cov txheej txheem, cov txheej txheem tshuaj xyuas nruj nruj ntsuas ntau yam khoom tseem ceeb. Cov ntsiab lus hauv qab no cov txheej txheem tshuaj xyuas cov txheej txheem rau galvanized steel coils, tsom rau cov tsos, qhov ntev, txheej zoo, thiab cov khoom siv kho tshuab.
I. Kev tshuaj xyuas qhov tshwm sim
Kev tshuaj xyuas qhov tshwm sim yog thawj kauj ruam hauv kev ntsuas qhov zoo ntawm galvanized steel coils. Nws feem ntau suav nrog kev tshuaj xyuas qhov muag lossis qis - lub zog loj kom pom qhov tsis xws luag. Kev tshuaj xyuas muaj xws li:
1. Kev huv huv ntawm qhov chaw: Tshawb xyuas lub coil nto rau cov roj seem, xeb, lossis nplai, kom ntseeg tau tias tsis muaj cov kab mob pom.
2. Coating Uniformity: Saib xyuas cov txheej txheem txuas mus ntxiv, tsis muaj cov txheej txheem uas ploj lawm, npuas, tawg, lossis flaking, ua tib zoo saib xyuas cov txheej txheej ntawm cov npoo thiab thaj chaw coiling.
3. Mechanical Damage: Tshawb xyuas qhov khawb, dents, thiab lwm yam kev puas tsuaj rau lub cev uas yuav cuam tshuam rau kev ua haujlwm tom ntej lossis kev ua haujlwm. Thaum lub sij hawm soj ntsuam, qhov unrolled feem ntawm steel kauj yuav tsum tau soj ntsuam tas li ntawm qhov ceev tsis tu ncua nyob rau hauv cov teeb pom kev zoo txaus (feem ntau ntau dua los yog sib npaug rau 500 Lux), thiab hom thiab qhov chaw ntawm qhov tsis xws luag yuav tsum tau sau tseg.
II. Dimensional thiab Appearance Inspection
Dimensional raug yog qhov tseem ceeb rau galvanized steel coils kom ua tau raws li qhov xav tau ntawm daim ntawv thov. Cov cuab yeej kws tshaj lij yuav tsum ntsuas cov ntsuas hauv qab no:
1. Thickness: Siv cov hlau nplaum thickness gauge los yog X-ray thickness gauge, ntsuas tag nrho cov thickness ntawm galvanized txheej (puag + txheej) thiab cov thickness ntawm cov ntshiab txheej ntawm ntau lub ntsiab lus raws qhov dav ntawm lub kauj. Qhov kam rau ua yog feem ntau nyob rau hauv ± 0.05mm.
2. Dav: Ntsuas qhov dav ntawm lub kauj siv lub laser rangefinder lossis daim kab xev ntsuas. Qhov sib txawv yuav tsum ua raws li cov cai ntawm kev txiav txim lossis tus qauv (xws li GB / T 2518-2019).
3. Inner thiab Outer Diameter: Xyuas kom meej tias lub puab txoj kab uas hla ntawm lub coil core (feem ntau 508mm los yog 610mm) thiab tag nrho cov coil txoj kab uas hla raws li ntim specifications los tiv thaiv deformation thaum lub sij hawm thauj mus los.
4.Flatness: Lub flatness tester yog siv los tshuaj xyuas cov hlau kauj rau cov teeb meem xws li wavy npoo thiab warping kom ntseeg tau tias muaj peev xwm ua tau rau kev ua tiav tom ntej.
III. Txheej Kev Tshuaj Xyuas Zoo
Qhov kev ua tau zoo ntawm cov txheej txheej galvanized ncaj qha cuam tshuam qhov kev tiv thaiv corrosion ntawm steel kauj thiab yuav tsum tau soj ntsuam los ntawm ntau qhov kev ntsuam xyuas tshwj xeeb:
1.Coating Weight: Cov txheej hnyav ntawm ib chav tsev yog ntsuas los ntawm kev siv txoj kev gravimetric (thawj qhov hnyav ntawm cov ntawv hlau liab qab, tom qab ntawd ntsuas cov ntawv hlau galvanized, thiab suav qhov sib txawv) lossis cov txheej txheem electrochemical (feem ntau xav tau ntau dua lossis sib npaug ntawm 60g / m² ntawm ob sab).
2.Adhesion: Lub zog sib txuas ntawm cov txheej txheej thiab cov txheej txheem tau txheeb xyuas tau siv tus ntoo khaub lig-hatch test (siv rab riam los kos ib daim phiaj ntawm cov txheej txheej thiab saib xyuas cov txheej txheej flaking) lossis kev sim khoov (khoov cov qauv steel coil 180℃thiab tshuaj xyuas cov txheej txheej rau kev tawg).
3.Salt Spray Resistance: Rau qee qhov siab - cov khoom xav tau, cov qauv raug kuaj los ntawm cov tshuaj tsw qab ntsev (NSS). Cov qauv raug cuam tshuam rau qhov ntsuas kub thiab av noo rau lub sijhawm tshwj xeeb (xws li 240 teev) txhawm rau ntsuas cov txheej tiv thaiv cov xeb dawb.
IV. Mechanical Properties Testing
Cov khoom siv hluav taws xob ntawm galvanized steel coils yuav tsum ua kom tau raws li lub zog thiab tsim cov kev cai ntawm kev ua haujlwm hauv qab. Kev ntsuam xyuas niaj hnub muaj xws li:
1. Tensile Testing: Transverse specimens raug txiav los ntawm lub taub hau los yog tus Tsov tus tw ntawm lub kauj thiab sim rau yield zog, tensile zog, thiab elongation siv lub universal xeem tshuab. Cov txiaj ntsig yuav tsum ua tau raws li cov qauv qib sib xws (xws li, lub zog tawm los Ntau dua lossis sib npaug ntawm 235 MPa rau Q235B galvanized steel).
2. Hardness Testing: Lub hardness ntawm lub kauj yog ntsuas los ntawm Rockwell los yog Brinell hardness tester, indirectly xav txog cov℃ntawm kev ua hauj lwm hardening.
V. Chemical Composition Analysis (Yeem)
Rau cov galvanized steel coils rau kev siv tshwj xeeb (xws li huab cua steel thiab siab -lub zog steel), cov tshuaj muaj pes tsawg leeg ntawm cov substrate (xws li, carbon, manganese, sulfur, thiab phosphorus cov ntsiab lus) yuav tsum tau kuaj ntxiv. Feem ntau, optical emission spectrometer (OES) los yog tshuaj titration yog siv los xyuas kom meej tias cov khoom muaj raws li cov qauv tsim.
VI. Test Report thiab txiav txim
Tom qab tag nrho cov kev ntsuam xyuas tiav, cov ntaub ntawv yuav tsum tau muab sau ua ke thiab ib tug qauv qhia generated. Daim ntawv tshaj tawm no suav nrog cov khoom xeem, cov hau kev, ntsuas qhov tseem ceeb, cov qauv yuav tsum tau ua, thiab kev txiav txim siab (pass / tsis). Yog tias ib tus neeg qhia pom tias tsis zoo (piv txwv li, txheej txheej tsis txaus lossis cov khoom siv tsis zoo), nthuav dav sampling thiab rov- kev tshuaj xyuas tib yam ntawm cov hlau coils yuav tsum tau ua, thiab cov txheej txheem traceability zoo yuav pib yog tias tsim nyog.
Xaus
Cov txheej txheem tshuaj xyuas rau galvanized steel coils yog ib kauj ruam tseem ceeb hauv kev ua kom cov khoom zoo thiab yuav tsum nruj me ntsis ua raws li cov qauv hauv tebchaws (xws li GB / T 2518 thiab ASTM A653) nrog rau cov neeg siv khoom xav tau. Kev ntsuam xyuas ntawm cov tsos, qhov ntev, txheej, thiab cov khoom siv kho tshuab ua tau zoo tshuaj ntsuam xyuas cov khoom tsis raug, muab cov khoom siv txhim khu kev qha rau cov kev siv qis qis thaum tseem pab cov tuam txhab txhim kho lawv cov kev sib tw ua lag luam thiab lub koob npe nrov.
