In order to increase wear resistance cast steel casting the TiC-Fe-Cr type composite zones were fabricated. These zones were obtained by
means of in situ synthesis of substrates of the reaction TiC with a moderator of a chemical composition of white cast iron with nickel of
the Ni-Hard type 4. The synthesis was carried out directly in the mould cavity. The moderator was applied to control the reactive
infiltration occurring during the TiC synthesis. The microstructure of composite zones was investigated by electron scanning microscopy,
using the backscattered electron mode. The structure of composite zones was verified by the X-ray diffraction method. The hardness of
composite zones, cast steel base alloy and the reference samples such as white chromium cast iron with 14 % Cr and 20 % Cr, manganese
cast steel 18 % Mn was measured by Vickers test. The wear resistance of the composite zone and the reference samples examined by ballon-disc
wear test. Dimensionally stable composite zones were obtained containing submicron sizes TiC particles uniformly distributed in
the matrix. The macro and microstructure of the composite zone ensured three times hardness increase in comparison to the cast steel base
alloy and one and a half times increase in comparison to the white chromium cast iron 20 % Cr. Finally ball-on-disc wear rate of the
composite zone was five times lower than chromium white cast iron containing 20 % Cr.
Refinement is one of the most energy consuming technological process, aimed at obtaining mineral raw materials of the proper grain size.
Cast structural elements such as jaws or hammers in crushing machines operate under conditions of an intensive wear. The data indicate
that 80 % of failures of machines and devices is caused by wearing of rubbing surfaces. This problem became the subject of several
scientific and industrial investigations carried out in the whole world in order to produce materials ultra- wear resistant. Methods allowing
to obtain wear resistant composite castings are discussed in the hereby paper. Within the performed research microstructures of the
produced composite zones were presented and the comparative analysis with regard to mechanical and functional properties of local
composite reinforcements in relation to the commercial alloys of increased wear resistance was performed. The results show almost twenty
five times increase in wear resistance compared to manganese cast steel containing 18 % Mn.