| 摘要 |
<p>PROBLEM TO BE SOLVED: To relax residual stress in the surface of a metal molding, and optimally control the surface roughness of the body. SOLUTION: This method is a surface treating method for metal moldings for treating the surface of a metal molding M by allowing abrasive grain to collide with the surface of the metal molding M. The first abrasive grain 5 whose mean particle size d1 is large, and the second abrasive grain 6 the mean particle size d2 of which is smaller than the mean particle size d1 of the first abrasive grain 5, and are composed of a mixture of these abrasive grains, namely mixed abrasive grains 7.</p> |
