Research on the lack of alloying in the galvannealed coating of automotive sheet steel-中国期刊网

摘要 Samplesofthecrosssectionmicrostructuresofgalvannealedsteelsheetsthatlackalloyingwereanalyzed.X-raydiffraction(XRD)testswerecarriedout.Thestudydiscoversthatthedeficitofalloyingwashigheronbothsidesofthesteelsheetwhencomparedtothecenterandthethicknessofthecoatingonthesideswasalsohigherthanthecenter.TheresultsoftheXRDtestsdemonstratethatthemicrostructureofthecoatingwithalackofalloyismainlycomposedofzinc,ζandδ.Theyalsoindicatethatthelackofalloyingismainlyduetoalowergalvannealingtemperatureandthickercoating.Itisshownbytheopticalmicrographsofcoatingthattheδphaseformsfirstinadiscontinuousmannerattheinterfaceandthenrapidlypushestowardsthecoatingandenlarges.

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Research on the lack of alloying in the galvannealed coating of automotive sheet steel

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Research on the lack of alloying in the galvannealed coating of automotive sheet steel

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