Sintokogio, Ltd.

Hayato Taniguchi

Yuto Kato

Naoya Tanuma

Fumiaki Kumeno

A surface treatment method includes a step of irradiating a workpiece with a pulsed laser beam through a transparent liquid and a step of causing particles to collide with a heat-affected layer developed on a surface layer portion of the workpiece in the step of irradiating. The particles each has a core made of an elastic body and abrasive grains provided on a surface of the core.

Surface treatment method

A particle diameter distribution of shot media before forming an operating mix is bimodal and substantially continuous, and out of a first particle group corresponding to a first peak and a second particle group corresponding to a second peak, one is an aggregate of particles in a shape having an angular part while the other is an aggregate of particles in a shape configured with a convex curved surface.

Projection material and blasting method

A blasting processing method using shot media. A particle diameter distribution of the shot media before forming an operating mix is bimodal and substantially continuous, and both a first particle group corresponding to a first peak and a second particle group corresponding to a second peak are aggregates of particles in a shape having an angular part.

Blasting processing method using shot media

A cast steel shot media for performing a blasting treatment, including, at a weight ratio, 0.8% or more and 1.2% or less of C, 0.35% or more and 1.2% or less of Mn, and 0.4% or more and 1.5% or less of Si, in which a remainder has a hyper-eutectoid composition including Fe and inevitable impurities, and the cast steel shot media has a structure having a fine pearlite structure as a main constituent.

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Toyokawa, Japan

Hayato Taniguchi