THE INFLUENCE OF STRAIN HARDENING TO THE STRUCTURE AND PROPERTIES OF FE-C-CR-MN STEELS

Abstract

The article deals with problems associated with strain-hardening of Fe-C-Cr-Mn-Ti-Si
alloys with low carbon metastable austenite matrix containing 6…7 % (vol.) thermodynamically
stable TiC carbide. Objective – research kinetics of strain hardening metastable surfacing alloys
system Fe-C-Cr-Mn-Ti-Si. Comparing their workability and durability to the widely used surfacing
alloys. Main results of the research: Surfacing chromium-manganese alloy steels with the structure
of metastable austenite has high wear resistance to abrasive wear compared to the surfacing of
tungsten steel. Durability is largely correlated with the microhardness of the surface layer. With
decreasing contents of metastable austenite the hardening effect and durability reduced. For
surfacing with martensitic structure a slight strain hardening is measured. This points to the leading
role of strain hardening of austenite and phase transformations in wear resistant surfacing alloys.
During tests on abrasive wear for chromium-manganese alloy steels wear intensity decreases, but
for materials with different structure it is not typical.