| 摘要 |
An improved coated cemented carbide insert for the cutting of steel is provided. The insert has multi-layer TiCN between the substrate and the kappa -Al2O3 coating. The innermost portion of the TiCN layer is composed of large columnar grains while the outermost portion is of small equiaxed grains. Above the kappa -Al2O3, another columnar Ti(C,N) layer is applied. <IMAGE> |
