Vv. Krasheninnikov et al., The technological possibility of fabricating tools by the method of laser surfacing, METAL SCI H, 40(5-6), 1998, pp. 222-225
The possibility of obtaining a layer of a high-hardness composite material
on a tool of steel 65G by the method of laser surfacing with R6M5 powder st
eel is studied. The use of laser radiation with a power exceeding 1 kW prov
ides for creation of a high energy concentration on the surface of the mate
rial and control over the temperature gradient in the volume of the tool. T
his makes it possible to create coatings with a minimum effect on the compo
sition of the substrate in the fusion zone, obtain cast high-speed steels i
n which the primary carbides are distributed in the form of individual part
icles, and combine the surfacing and the heat treatment of the coating in a
single process. The surfacing includes deposition of the powder steel on t
he surface of the treated part by means of a special batching crystallizer
without any adhesive binder and treatment by a laser beam with a power of a
bout 2 kW.