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近年来,国外黑色刃具产品均已采用表面着白色标记的方法,其标记对比度明显、清晰、美观;国内至今仍采用机械压字后再进行热处理、表面处理的老工艺,如氧氮化钻头表面及标记均为黑色,标记不明显,难于辨认.由于机械压字引起金属变形,常常造成径向圆跳动超差,影响产品质量;且一旦产口成型后则因硬度高而标记又不能更改或增加,从而大大影响了产品销售灵活性。随着生产形势的发展,不少国内外用户对这种标记提出了异议。
In recent years, foreign black blade products have been used on the surface of the white marking method, the marked contrast is clear, clear, beautiful; China is still using mechanical pressure after heat treatment, surface treatment of the old processes, such as nitrided bit surface And marks are black, the mark is not obvious, difficult to identify due to mechanical pressure caused by metal deformation, often resulting in radial circle beating over tolerance, affecting the quality of products; and once the output after the formation of high hardness and can not be marked or marked change Increase, which greatly affected the product sales flexibility. With the development of the production situation, many domestic and foreign users have raised objections to this mark.