PURPOSE: To provide crack-free clad plate in explosion contact, base and clad materials are faced so that the base material rolling direction is at right angle to one transverse direction of clad material.
CONSTITUTION: Base material 1 such as steel, low alloy steel, stainless steel is placed on bench 6 such as sand, iron plate. On the base material surface 1, clad material 2 such as copper, copper alloy, nickel alloy is placed, with spacers 3,3... inserted therebetween. Side A of the clad material 2 is made right angle to the rolling direction 7 in the production of the base material 1. Explosive powder 5 for metal working is put on the clad material 2 in an adequate quantity, and detonator 4 is actuated so that the clad material 2 is partially explosion-contacted to the base material 1.