Provided is a structural material comprising a steel sheet with a tensile strength of 980 MPa or greater stacked and joined by welding with another metal sheet, such that a welding-induced fracture originating around a weld is less liable to occur. The structural material (10, 10a, 10b, 10c) is constituted by a first member (1) which is a steel sheet with a tensile strength of 980 MPa or greater,a second member (2) which is a metal sheet stacked on the first member (1), a plurality of welds (3, 31, 32), and a plurality of heat affected zones (5, 51, 52) formed around each of the plurality ofwelds (3, 31, 32) and having a Vickers hardness of 50 HV or greater than the Vickers hardness of the first member. A pair of end parts (4, 4) of the first member (1) are provided between adjacent heataffected zones (5, 51, 52). The pair of end parts (4, 4) of the first member between the adjacent heat affected parts (5, 51, 52) extend in a direction traversing a line (LC1) joining adjacent welds(3, 31, 32).
在具有使抗拉强度为980MPa以上的钢板与另一个金属板重合并通过焊接而接合在一起的结构的构造材料中,不容易发生以通过焊接形成的焊接部附近为起点的断裂。构造材料(10、10a、10b、10c)包括:第1构件(1),其是抗拉强度为980MPa以上的钢板;第2构件(2),其是与所述第1构件(1)重合的金属板;多个焊接部(3、31、32);以及多个热影响部(5、51、52),其形成于多个焊接部(3、31、32)的各焊接部的周围并且维氏硬度比第1构件的维氏硬度低出50HV以上。在相邻的热影响部(5、51、52)之间设有第1构件(1)的一对端部(4、4)。相邻的热影响部(5、51、52)之间的第1构件的一对端部(4、4)沿着横穿将相邻的焊接部(3、31、32)连结的线(LC1)的方向延伸。
Structural material
构造材料
2020-06-26
Patent
Electronic Resource
Chinese