METHOD FOR ESTIMATING THE PRESS FORMABILITY OF GALVANNEALED STEEL SHEETS BY X-RAY DIFFRACTION

A method for estimating the press formability of galvannealed steel sheets provided, wherein: the values found by: , and wherein I( zeta ) = the total X-ray diffraction intensity of the zeta phase, I( GAMMA ) = the total X-ray diffraction intensity of the GAMMA phase, IB( zeta )= the background X-ra...

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Hauptverfasser: KAZUAKI CHOHATA, TOSHIHARU KITTAKA, YUSUKE HIROSE, MINORU SAITO, TAKESHI NAGATANI
Format: Patent
Sprache:eng
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Zusammenfassung:A method for estimating the press formability of galvannealed steel sheets provided, wherein: the values found by: , and wherein I( zeta ) = the total X-ray diffraction intensity of the zeta phase, I( GAMMA ) = the total X-ray diffraction intensity of the GAMMA phase, IB( zeta )= the background X-ray diffraction intensity of the zeta phase, I( zeta ) - IB( zeta ) = the true X-ray diffraction intensity of the zeta phase, I( GAMMA ) - IB( GAMMA ) = the true X-ray diffraction intensity of the GAMMA phase, GAMMA = the GAMMA phase of an Fe-Zn intermetallic compound in coating of galvannealed steel sheet, and zeta = the zeta phase of the intermetallic compound, are used as an index to determine the press formability. M