Hot stamped body
A hot stamped body comprising a steel base material and an Al—Zn—Mg-based plating layer formed on a surface of the steel base material, wherein the plating layer has a predetermined chemical composition, the plating layer comprises an interfacial layer positioned at an interface with the steel base material and containing Fe and Al and a main layer positioned on the interfacial layer, the main layer comprises, by area ratio, 10.0 to 70.0% of an Mg—Zn containing phase and 30.0 to 90.0% of an Fe—Al containing phase, the Mg—Zn containing phase comprises at least one selected from the group consisting of an MgZn phase, Mg 2 Zn 3 phase, and MgZn 2 phase, and the Fe—Al containing phase comprises an FeAl phase and Fe—Al—Zn phase and an area ratio of the Fe—Al—Zn phase in the main layer is more than 10.0 to 75.0%.
1 . A hot stamped body comprising a steel base material and a plating layer on a surface of the steel base material, wherein the plating layer has a chemical composition comprising, by mass %,
Al: 15.00 to 45.00%,
Mg: 5.50 to 12.00%,
Si: 0.05 to 3.00%,
Ca: 0.05 to 3.00%,
Fe: 20.00 to 50.00%,
Sb: 0 to 0.50%,
Pb: 0 to 0.50%,
Cu: 0 to 1.00%,
Sn: 0 to 1.00%,
Ti: 0 to 1.00%,
Sr: 0 to 0.50%,
Cr: 0 to 1.00%,
Ni: 0 to 1.00%,
Mn: 0 to 1.00%, and
balance: Zn and impurities,
the plating layer comprises an interfacial layer positioned at an interface with the steel base material and containing Fe and Al and a main layer positioned on the interfacial layer,
the main layer comprises, by area ratio, 10.0 to 70.0% of an Mg—Zn containing phase and 30.0 to 90.0% of an Fe—Al containing phase,
the Mg—Zn containing phase comprises at least one selected from an MgZn phase, Mg 2 Zn 3 phase, and MgZn 2 phase, and
the Fe—Al containing phase comprises an FeAl phase and Fe—Al—Zn phase and an area ratio of the Fe—Al—Zn phase in the main layer is more than 10.0 to 75.0%.
2 . The hot stamped body according to claim 1 , wherein the chemical composition of the plating layer comprises, by mass %,
Al: 25.00 to 35.00% and
Mg: 6.00 to 10.00%.
3 . The hot stamped body according to claim 1 , wherein the Mg—Zn containing phase comprises an MgZn phase, and an area ratio of the MgZn phase in the main layer is 5.0% or more.
4 . The hot stamped body according to claim 1 , wherein the Mg—Zn containing phase comprises an MgZn phase and Mg 2 Zn 3 phase, and an area ratio of a total of the MgZn phase and Mg 2 Zn 3 phase in the main layer is 25.0 to 50.0%.
5 . The hot stamped body according to claim 1 , wherein an area ratio of the FeAl phase in the main layer is 5.0 to 25.0%.
6 . The hot stamped body according to claim 2 , wherein the Mg—Zn containing phase comprises an MgZn phase, and an area ratio of the MgZn phase in the main layer is 5.0% or more.
7 . The hot stamped body according to claim 2 , wherein the Mg—Zn containing phase comprises an MgZn phase and Mg 2 Zn 3 phase, and an area ratio of a total of the MgZn phase and Mg 2 Zn 3 phase in the main layer is 25.0 to 50.0%.
8 . The hot stamped body according to claim 3 , wherein the Mg—Zn containing phase comprises an MgZn phase and Mg 2 Zn 3 phase, and an area ratio of a total of the MgZn phase and Mg 2 Zn 3 phase in the main layer is 25.0 to 50.0%.
9 . The hot stamped body according to claim 2 , wherein an area ratio of the FeAl phase in the main layer is 5.0 to 25.0%.
10 . The hot stamped body according to claim 3 , wherein an area ratio of the FeAl phase in the main layer is 5.0 to 25.0%.
11 . The hot stamped body according to claim 4 , wherein an area ratio of the FeAl phase in the main layer is 5.0 to 25.0%.