Structure and Properties of Wear-Resistant Surfacing of Secondary Hardening Steels

Abstract

Purpose – the improvement of wear resistance and heat resistance secondary hardening
surfacing of steels by optimization of composition of alloying flux-cored wires are de-energized
with the use of additives for optimizing the content of titanium, molybdenum and chromium.
Methods of experimentation included: physical, mechanical, chemical, metallographic tests,
test of heat resistance of deposited metal cored wires.
It is established that the increase of heat resistance of alloys of the system Cr-Mn-Ti ironbased contributes to the increase in the content of carbide phase [TiC]; introduction [Mo] stabilizes
the hardness values at elevated temperatures, improves heat resistance and hardness of the
dispersion hardening. High levels of heat resistance and wear resistance of steel 20Х3Г9М5Т2С
achieved by additional diffusion of the carbide phase formation during aging, increasing the contact
strength and microplasticity surface layer, a significant amount and uniform distribution in the
volume of the deposited metal carbide phase.
Developed composition of surfacing flux-cored wires to restore the punching tools made of
tool steel of the type 5ХНМ in terms of the molecular-mechanical wear at elevated temperatures.