Method for butt welding, butt welded joint, and outside joint member for constant velocity universal joint

A method of manufacturing an outer joint member of a constant velocity universal joint, the method comprising:

• bringing a solid shaft-shaped end portion of a cup member and a solid shaft-shaped end portion of a shaft member into abutment against each other;
• and
• radiating a high energy intensity beam from a radially outer side to perform butt welding, wherein
• the shaft member has a joining end surface and a recess formed on a radially inner side of the joining end surface of the shaft member,
• the cup member has a joining end surface protruding toward a radially inner side with respect to an inner diameter of the joining end surface of the shaft member and a protruding portion provided on a radially inner side with respect to the joining end surface of the cup member,
• the shaft member is formed by upset forging,
• the cup member is formed by forging,
• the joining end surface and the protruding portion of the cup member are formed by performing turning on only an annular region of an end surface of the cup member, and
• the butt welding is performed by bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other.