Importance

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Abstract

A composite structural body, comprising a rotor, a stator, and magnetic materials such as of magnet-buried type capable of providing excellent strength and thermal resistance and preventing a metal container from being deformed by a hot hydrostatic forming, wherein a specified part is formed of a material and formed with a thickness difficult to be deformed by a pressure at the time of hot hydrostatic forming so as to form a highly strong part and formed of a material and formed with a thickness easy to be deformed by the pressure so as to set a low strength part, and powder is put in the metal container, and the container is sealed and put in a high temperature and high pressure atmosphere, whereby, because the part weak against the pressure is deformed, the deformation of the part strong against the pressure, i.e., the preset highly strong part requiring a specified accuracy and shape is reduced, the metal container and the powder filled therein are fitted to each other and formed integrally with each other, and a magnetic structural body durable, heat resistant, and complicated more than a conventional structure can be provided and, because the metal container is not deformed, the working after forming is facilitated and the productivity is improved tremendously.

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First Claim