Patent ID: 8865059

Claim:
A method for producing a rolled material comprising: an accommodation process of accommodating metal powder in a case for rolling a powder alloy, wherein the case is formed like a box by a side face configuring member configured to be formed like a rectangular frame with a plurality of members combined and to surround side faces of metal powder, an upper lid configuring member configured to be provided to cover one opening of the side face configuring member and to cover an upper face of the metal powder, and a lower lid configuring member configured to be provided to cover the other opening of the side face configuring member and to cover a lower face of the metal powder; and a rolling process of rolling the case where the metal powder is accommodated, wherein joints between the plurality of members of the side face configuring member are arranged in opposing two side faces out of four side faces of the side face configuring member, and the joints are located within the opposing two side faces apart from corners of the side face configuring member, and wherein in the rolling process the case is rolled in a direction intersecting the opposing two side faces where the joints are formed.