Surface roughening treatment method of object being treated, and apparatus therefor

An apparatus for using magnetic abrasive grains to perform treatment roughening surfaces of an object being treated, comprising a rotational magnetic field generating device connected to a three-phase alternating current power source and formed in the form of a motor/stator, a surface roughening treatment vessel in the form of a hollow cylinder arranged substantially coaxially in the rotational magnetic field generating device and made of a non-magnetic conductive material, the surface roughening treatment vessel being capable of receiving the object in the form of a hollow cylinder being treated, in a lumen thereof and having a volume capable of receiving magnetic abrasive grains being a processing medium, the rotational magnetic field generating device being wound in a manner of a two-pole motor/stator, and an iron core inserted into a lumen of the object being treated, received in the surface roughening treatment vessel to be able to hold and rotate the object being treated, about an axis thereof.