Powder for grinding and grinding method

摘要

Powder for grinding according to the present invention is powder for grinding that is manufactured according to the atomize method and serves as a medium for grinding a surface of a base substrate to form concave portions. The powder for grinding contains as its components at least one of Fe and Ni and W (tungsten) and a content of W is 30 to 55 wt% and a specific gravity thereof is equal to or higher than 8.5. Preferably, the powder for grinding further contains Cr at a content of 1 to 25 wt%. Preferably, the powder for grinding further contains B at a content of 0.5 to 4 wt%. It is possible to surely collect the powder for grinding making use of a difference between a specific gravity of the powder for grinding and a specific gravity of grinding wastes. The powder for grinding collected is suitable for being served for reuse at least once.