Hot stamped body

Abstract

Provided is a hot stamped body which includes a base metal, and a plated layer formed on a surface of the base metal, wherein the plated layer includes an interface layer, an intermediate layer, and an oxide layer in order from a base metal side, the interface layer contains one or more kinds of Fe—Al alloy, a total area fraction of the Fe—Al alloy being 99% or more, the intermediate layer 22 contains one or more kinds of Fe—Al—Zn alloy, a total area fraction of the Fe—Al—Zn phase being 50% or more, an average composition of the intermediate layer contains, in mass %, Al: 30 to 50% and Zn: 15 to 30%, and an average film thickness of the oxide layer is 3.0 μm or less, and Mg content in the oxide layer is 0.05 to 0.50 g/m2.

1 . A hot stamped body comprising: a base metal and a plated layer formed on a surface of the base metal, wherein
 the plated layer includes an interface layer, an intermediate layer, and an oxide layer in order from a base metal side,   the interface layer contains an Fe—Al alloy having a microstructure which contains one or more kinds selected from αFe, Fe 3 Al and FeAl, a total area fraction of the Fe—Al alloy being 90% or more,   the intermediate layer contains an Fe—Al—Zn phase which contains one or more kinds selected from Fe(Al, Zn) 2 , Fe 2 (Al, Zn) 5  and Fe(Al, Zn) 3 , a total area fraction of the Fe—Al—Zn phase being 50% or more,   an average composition of the intermediate layer contains, in mass %,   Al: 30 to 50% and   Zn: 15 to 30%, and   an average film thickness of the oxide layer is 3.0 μm or less, and Mg content in the oxide layer is 0.05 to 1.00 g/m 2 .   
     
     
         2 . The hot stamped body according to  claim 1 , wherein
 an average film thickness of the interface layer is 1.0 μm or more.   
     
     
         3 . The hot stamped body according to  claim 1 , wherein
 a total content of Al and Zn in the plated layer is 20 to 100 g/m 2 .   
     
     
         4 . The hot stamped body according to  claim 1 , wherein
 a total area fraction of the Fe—Al—Zn phase in the intermediate layer is 90% or more.   
     
     
         5 . The hot stamped body according to  claim 1 , wherein
 the plated layer further contains, in mass %, 0.1 to 15% of Si, and   the intermediate layer further contains an Fe—Al—Si phase which contains one kind or two kinds selected from Fe 3 (Al, Si) and Fe(Al, Si), a total area fraction of the Fe—Al—Zn phase and the Fe—Al—Si phase being 90% or more.   
     
     
         6 . The hot stamped body according to  claim 2 , wherein
 a total content of Al and Zn in the plated layer is 20 to 100 g/m 2 .   
     
     
         7 . The hot stamped body according to  claim 2 , wherein
 a total area fraction of the Fe—Al—Zn phase in the intermediate layer is 90% or more.   
     
     
         8 . The hot stamped body according to  claim 3 , wherein
 a total area fraction of the Fe—Al—Zn phase in the intermediate layer is 90% or more.   
     
     
         9 . The hot stamped body according to  claim 6 , wherein
 a total area fraction of the Fe—Al—Zn phase in the intermediate layer is 90% or more.   
     
     
         10 . The hot stamped body according to  claim 2 , wherein
 the plated layer further contains, in mass %, 0.1 to 15% of Si, and   the intermediate layer further contains an Fe—Al—Si phase which contains one kind or two kinds selected from Fe 3 (Al, Si) and Fe(Al, Si), a total area fraction of the Fe—Al—Zn phase and the Fe—Al—Si phase being 90% or more.   
     
     
         11 . The hot stamped body according to  claim 3 , wherein
 the plated layer further contains, in mass %, 0.1 to 15% of Si, and   the intermediate layer further contains an Fe—Al—Si phase which contains one kind or two kinds selected from Fe 3 (Al, Si) and Fe(Al, Si), a total area fraction of the Fe—Al—Zn phase and the Fe—Al—Si phase being 90% or more.   
     
     
         12 . The hot stamped body according to  claim 6 , wherein
 the plated layer further contains, in mass %, 0.1 to 15% of Si, and   the intermediate layer further contains an Fe—Al—Si phase which contains one kind or two kinds selected from Fe 3 (Al, Si) and Fe(Al, Si), a total area fraction of the Fe—Al—Zn phase and the Fe—Al—Si phase being 90% or more.