Method for making a metal material composite

A method for making a metal material composite characterized by comprising:

• contacting a first surface of a first plate with a second surface of a second plate;
• placing the first plate and the second plate in a recess in a circumferential direction of a first roller such that a third surface of the second plate contacts a bottom wall of the recess, wherein the third surface is opposite the second surface, and the first plate has a greater hardness than the second plate;
• and
• controlling a first roller and a second roller to rotate, thereby rolling to combine the first plate and the second plate into a composite plate, wherein a fourth surface of the first plate contacts a surface of the second roller, and the fourth surface is opposite the first surface during the rolling;
• wherein before the step of contacting the first surface of the first plate with the second surface of the second plate, prefabricating the first plate and the second plate in a thickness ratio of 1.5:1.0;
• and
• wherein in the step of controlling the first roller and the second roller to rotate, thereby rolling to combine the first plate and the second plate into the composite plate, controlling a differential speed ratio of the first roller to the second roller to be 1:1.05, and a reduction rate of rolling to be 20% to 40%.

A method for making a metal material composite, characterized by comprising:

• contacting a first surface of a first plate with a second surface of a second plate;
• placing the first plate and the second plate in a recess in a circumferential direction of a first roller such that a third surface of the second plate contacts a bottom wall of the recess, wherein the third surface is opposite the second surface, and the first plate has a greater hardness than the second plate;
• and
• controlling a first roller and a second roller to rotate, thereby rolling to combine the first plate and the second plate into a composite plate, wherein a fourth surface of the first plate contacts a surface of the second roller, and the fourth surface is opposite the first surface during the rolling, wherein in the step of controlling the first roller and the second roller to roll and combine the first plate and the second plate into the composite plate,
• a shear strength τ=a*b*K1*K2*σsoft is obtained for the composite plate,
• wherein a is a length of the first plate, b is a width of the first plate, K1 is a roughened area ratio of the first plate, and a value range of K1 is 1.5 to 3;
• K2 is a degree of bonding between the first plate and the second plate, a value range of K2 is 0.15 to 0.3, and when K1*K2>1, a product of K1 and K2 takes a value of 1;
• the σsoft is a yield strength of the second plate, and a value range of the σsoft is 350 MPa to 412 MPa.