Assembled slab manufacturing method, assembled slab, and clad steel sheet manufacturing method

Abstract

In a method for manufacturing an assembled slab as a rolled raw material for manufacturing a clad steel sheet comprising a base material, and a cladding material joined to the base material, welding is performed using high-energy beam welding on a contact portion (6) between a base raw material (1) and a cladding raw material (2) on an end surface (12) of an assembled slab (10), and, in the high-energy beam welding, an aiming position (8) of a welding beam (7) is shifted from the contact portion (6) to a high thermal conductivity material side. Consequently, in the assembled slab (10), an imbalance between a weld portion (9) and a contact surface (11) can be eliminated, and therefore it is possible to provide: an assembled slab manufacturing method with which, when joining contact portions of different types of metals using high-energy beam welding, weld metal penetration is not formed in an unbalanced manner on one material side, and supplying a filler for welding is unnecessary; an assembled slab; and a clad steel sheet manufacturing method.