PURPOSE: To prevent the seizure between rolling rolls and a composite wire, by providing metals having high resistance to heat and abrasion to the parts of the surfaces of the rolling rolls in contact with both plate materials.
CONSTITUTION: A thick-walled relatively soft plate material, for example, an Al plate material 2 and a thin-walled relatively hard plate material, for example, a stainless steel plate material 1 are rolled and press-welded by using rolling rolls 3, 4 provided with grooves 6 on both rolls, whereby the material 2 is deformed plastically and a composite wire rod is produced. Co-based alloys of, for example, about 5mm thickness having high resistance to heat and abrasion are build-up welded in the groove parts 6 of the rolls 3, 4 and the circumferential edges thereof, whereby rolled and press welded parts 7 are formed.
MIYAKE YASUHIKO
ISHIDA AKINORI
