METHOD FOR EXPLOSIVE WELDING OF SUCH DISSIMILAR METALS AS IRON-ALLOY WORKPIECE AND COPPER-ALLOY LINING MATERIAL IN HYDRAULIC MOTOR AND PUMP CYLINDER BLOCK

摘要

PURPOSE: A method for the explosive welding of dissimilar metals in a hydraulic motor and a pump cylinder block is provided to improve the weldability and bonding strength by processing a member and a workpiece in the same shape and to reduce the production cost by excluding a mechanical processing. CONSTITUTION: In the manufacture of a cylinder block, an iron-alloy workpiece(102) is curved, and a copper-alloy lining material(103) is pressed in the shape of the iron-alloy workpiece. Thus, the gap between the copper-alloy lining material and the iron-alloy workpiece is kept uniform. Thereafter, an explosive(104) is detonated. With the explosive pressure, the lining material is deformed and collided against the workpiece. The lining material is sequentially welded with the workpiece.