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Laser Surface Engineering Of Tool Materials

The very nature of laser surface melting allows for localised modification of a surface, and it is this feature which makes it ideally suited to treatment of single point cutting tools. High speed steel M42 material has been laser surface melted and in trials, the resulting microstructural modifications have produced improved cutting performances over conventionally heat-treated material. In addition, laser alloying of a low-alloy steel substrate to achieve an M42-type cutting tip has also demonstrated acceptable cutting performances. With the different wear conditions encountered in die materials, it is thought that the addition of ceramic material to the die may enhance performance, and preliminary work on surface melting and alloying of this type of substrate is also reported.