To provide a galvanized heat-treated steel material allowing persistence of a required plated layer even after heat treatment and securing corrosion resistance and film adhesion after coating.
A galvanized heat-treated steel material is obtained by heating a galvanized steel material to a temperature range allowing plastic deformation or hardening and has a coating weight per side of a plated layer present on the surface of 20-100 g/m2, an Fe concentration of the plate layer of 10-35% and a center line average roughness Ra of the surface of the plated layer of 1.5-5 μm and contains a η phase in the plated layer. With a coating weight per side of the plated layer of 30-150 g/m2 and after heating of the galvanized plated steel material followed by cooling at a cooling rate of 30°C/s or higher, the surface roughness of the plated layer persisting on the surface of the galvanized plated steel material is adjusted with a pressor roll.
TOMIZAWA ATSUSHI
KOJIMA HIROTATSU
ISHII KAZUYA
IMAI KAZUHITO
SHIMADA NAOAKI
NAKAMURA TOYOMITSU
| JPH0368749A | 1991-03-25 | |||
| JP2000248338A | 2000-09-12 | |||
| JPH10226862A | 1998-08-25 | |||
| JP5246273B2 | 2013-07-24 | |||
| JPH0368749A | 1991-03-25 | |||
| JP2000248338A | 2000-09-12 |
| WO2006093006A1 | 2006-09-08 | |||
| WO2009096351A1 | 2009-08-06 | |||
| WO2009096351A1 | 2009-08-06 | |||
| WO2006093006A1 | 2006-09-08 |
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