The Prospective Boriding Technologies Guaranteeing the Improvements in the Plasticity of Layers

Abstract

Boronized plastic layers are obtained with different methods. Herewith the adequate choice of boriding technology, composition of saturating mixture, substrate’s material, layer’s width, temperature-temporal parameters, heating and cooling conditions lead to the formation of plastic boronized layers under any type of processing. The chapter contains recommended compositions and methods for generating most perspective plastic boronized layers. The chapter also deals with the general preparation procedures and their characteristics. Thus, it is important to take into account the peculiarities of the chosen technology of boriding. The authors describe the following technological processes in order to point out the specifics of the chosen boriding technology:

• the technology of boriding in powder mediums;

• the technology of boriding in liquid mediums;

• the technology of boriding in compact materials (coatings);

• the technology of boriding in gaseous mediums.

Moreover the methods for intensifying the diffusioin saturation are proposed.

The method of chemical precipitation of borides from steam phase is analyzed (CVD-process). For instance, the precipitation of TiB₂ boride leads to obtaining 3300–4500 HV hardness on the surface.