Patent ID: 8697253
Filing Date: 2014-04-15
Classification: B32B,C21D,C23C,Y10T

Abstract:
1. A high-strength quenched formed body, being good in corrosion resistance, and the high-strength quenched formed body comprising: a formed-body steel material subjected to a quenching treatment; and a surface layer disposed on the surface of said formed-body steel material; wherein the surface layer has been subjected to the quenching treatment along with the formed-body steel material; the surface layer, before the quenching treatment, includes Fe: 1% by mass or less and includes at least one readily-oxidizing element selected from the group consisting of Al and Si in an amount of 0.15% by mass or more, and during the quenching treatment, a continuous layer of at least one selected from the group consisting of oxidized Al and oxidized Si is formed on the surface of the surface layer, after the quenching treatment, the surface layer is made from Zn as a major component, and the surface layer is formed of Fe: 30% by mass or less; and after the quenching treatment, the continuous layer of at least one selected from the group consisting of oxidized Al and oxidized Si is on the surface layer; said surface layer, after the quenching treatment, is made in an amount of 30 g/m wherein the quenching treatment includes heating to a temperature in the range of 800° C. to 950° C.