HOT DIP GALVANNEALED STEEL SHEET

申请公布号：

JPH10306361(A)

申请号：

JP19970127850

申请日期：

1997.05.02

申请公布日期：

1998.11.17

申请人：

NKK CORP

发明人：

INAGAKI JUNICHI;SAKURAI MICHITAKA;SAGIYAMA MASARU;AHMAD T ALPASS

分类号：

C23C2/06;C23C2/28;(IPC1-7):C23C2/28

主分类号：

C23C2/06

摘要：

PROBLEM TO BE SOLVED: To provide a hot dip galvannealed steel sheet with plating coating good in powdering resistance at the time of forming. SOLUTION: This hot dip galvannealed steel sheet is the one in which, on the surface of a steel sheet,Γphases, a coexisting layer ofΓ1 phases andδ1 phases,δ1 phases orδ1 phases andζphases are successively formed from the side of the steel sheet, and the average thickness of theΓphases is regulated to <=1.5μm, the average thickness of the coexisting layer of theΓ1 phases and theδ1 phases is regulated to less than two times the average thickness of theΓphases, and the abundance ratio of theΓ1 phases in the coexisting layer of theΓ1 phases and theδ1 phases is regulated to 10 to 60% by the area ratio in the cross-section of the coating.