Laminated steel plate
In a laminated steel plate in which steel plates are joined to both faces of a core layer, the core layer is formed of a meshed wire group formed using wires in a mesh form and a resin sheet, the wires forming the meshed wire group have a tensile strength of 601 MPa or higher, and an opening of the meshed wire group is equal to or less than ten times the thickness of the steel plates. By thus defining the tensile strength of the wires, light-weightness can be achieved compatibly with high rigidity and shock resistance, and by defining the opening of the meshed wire group, workability and shape stability after being processed can be improved.
1. A laminated steel plate, comprising:
a core layer including a wire group formed in a mesh form using wires and a resin sheet, and
steel plates joined respectively to both faces of the core layer,
wherein the wires have a tensile strength of 601 MPa or higher, and an opening of the wire group is equal to or less than ten times the thickness of the steel plates, and
wherein a thickness of the core layer is 0.1 mm to 3.0 mm, and a thickness of the steel plates is 0.2 mm to 2.0 mm.
2. The laminated steel plate according to claim 1 , wherein
the tensile strength of the wires is 1000 MPa or higher.
3. The laminated steel plate according to claim 1 , wherein
the opening of the wire group is equal to or less than 3.5 times the thickness of the steel plates.
4. The laminated steel plate according to claim 1 , wherein
the opening of the wire group is equal to or more than 0.1 times the thickness of the steel plates.
5. The laminated steel plate according to claim 3 , wherein
the opening of the wire group is equal to or more than 0.5 times and equal to or less than 1 times the thickness of the steel plates.
6. The laminated steel plate according to claim 1 , wherein
the core layer and the steel plates are joined with an adhesive,
a shearing adhesion strength of the adhesive and the steel plates is 30 N/cm 2 or higher, and
a storage modulus G′ of the adhesive at 100° C. to 160° C. is 0.05 MPa or higher and 100 MPa or lower.
7. The laminated steel plate according to claim 1 , wherein
weaves are added to the wire group in an oblique direction with respect to vertical wires and horizontal wires.
8. The laminated steel plate according to claim 7 , wherein
the wire group is a square mesh, and
the oblique direction is a direction of 45° with respect to directions of the vertical wires and the horizontal wires.
9. The laminated steel plate according to claim 1 , wherein
the core layer is formed of the wire groups laminated in n (n is integer of 2 or larger) layers, and
the direction of the wires forming the wire groups of every layer is shifted in a certain direction by an angle of 360/3 n ° or more and 360/n° or less between the wire groups of adjacent layers, so as to laminate the wire groups of respective layers.
10. The laminated steel plate according to claim 9 , wherein
the core layer is formed of the wire groups laminated in 2 layers to 20 layers.
11. The laminated steel plate according to claim 1 , wherein
the core layer has three or more of the wire groups, and
among adjacent two of the wire groups selected arbitrarily from three or more of the wire groups, the opening of the wire group disposed on a farther side with respect to a center position in a thickness direction of the core layer is smaller than the opening of the wire group disposed on a nearer side.
12. The laminated steel plate according to claim 1 , wherein
the core layer has a plurality of the wire groups, and
the plurality of the wire groups are joined with each other by solid phase joining or weaving.
13. The laminated steel plate according to claim 1 , wherein a base material of the resin sheet is a foam.