| 摘要 |
PROBLEM TO BE SOLVED: To suppress the effect of the uneven surface of a surface layer, by improving the smoothness of the surface, as well as arranging an abrasive material densely continuously on the surface, in a hard raw material used as the material of a tool or the like. SOLUTION: Adjacent abrasive materials 2 are arranged in one layer in contact with one another on the surface of a base material 1, and wax materials 3 are filled in the clearances of the abrasive materials 2, so as to form an abrasive material layer, and the surface of the abrasive material layer is cut in a uniform even surface. As a result, the surface of the abrasive material layer is mostly occupied by the abrasive material, so as to be high in wear resistance and furthermore, a hard raw material of an even surface can be obtained.
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