PLASMA-JET POWDER HARD-FACING AND ELECTRIC RESISTANCE ROLLING OF ANTIFRICTIONAL AND WEAR-RESISTANT COATINGS

Kuznechik O.O., Researcher, Powder Metallurgy Institute of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
Smjaglikov I.P., Candidate of Technical Sciences, Head of the Laboratory of Physico-Technical Institute of the NAS of Belarus, Minsk, Republic of Belarus
Sosnovsky A.V., Candidate of Technical Sciences, Senior Researcher of the Laboratory of Gas-Thermal Methods of Hardening of Machine Parts, STC “Technology of Mechanical Engineering and Process Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus

TECHNOLOGICAL MECHANICS

In article the technique and results of researches of processes plasma-jet powder hard-facing with the subsequent electric resistance rolling of antifrictional and wearproof coatings made from nickel and bronze powders is resulted. It is shown, that speed of plasma-jet powder hard-facing influences on bases distortion, and also structure (in particular, on residual porosity) of antifrictional and wear-resistant coatings material, including their hardness and strength. The electric resistance rolling realized after overlaying welding, at the expense of flattening of available hollows in the material of a powdered coating, can reduce the residual porosity, raise hardness and strength of coatings to level analogous, gained at rather small (in two and more times) speeds of plasma-jet powder hard-facing.

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