Patent ID: 8637163
Filing Date: 2014-01-28
Classification: C22C,C23C,Y10T

Abstract:
1. A hot dip alloy-plated steel material having at least at part of its surface an alloy with a high amorphous phase forming ability as a hot dip plating layer, said hot dip alloy-plated steel material characterized in that said alloy with a high amorphous phase forming ability comprising at least two elements from a group of elements A with an atomic radius of less than 0.145 nm, and at least one element from each of a group of elements B with an atomic radius of 0.145 nm to less than 0.17 nm and a group of elements C with an atomic radius of 0.17 nm or more, said alloy characterized in that, a total content of elements belonging to the group of elements A is 40 to less than 64.7 atm %, a total content of elements belonging to the group of elements B is over 35 to 59.7 atm %, and a total content of elements belonging to the group of elements C is 0.3 to 15 atm %, when designating the elements with the greatest contents in the group of elements A, group of elements B, and group of elements C as respectively “element a”, “element b”, and “element c”, and the element with the next greatest content in the group of elements A as “element a′”, the ratio of the total of element a and element a′ in the group of elements A is 70 atm % or more, the ratio of element b in the group of elements B is 70 atm % or more, and the ratio of element c in the group of elements C is 70 atm % or more, and a liquid forming enthalpy between any two elements selected from element a, element b, and element c is negative, wherein in said hot dip plating layer, a volume fraction of 5% or more is an amorphous phase, wherein said element a is Zn, and said element a′ is Al, said element b is Mg, and said element c is Ca, and wherein said hot dip plating layer is characterized by containing said Zn (element a) and Al (element a′) in a total amount of 40 to less than 64.7 atm %, Mg (element b) in over 35 to 59.7 atm %, and Ca (element c) in 0.3 to 15 atm %.