Chromium-manganese alloys on ochobi iron with increased tribological properties
Keywords:
Semiconductor silicon, complex doping, interaction energy, phase transformations, dislocation density, twins, magnetic field treatment, microhardness, specific electrical resistivity, charge minority-carrier lifetimeSynopsis
In this work, the rational compositions of the chemical composition of established and substantiated chromium-manganese alloys in the following ranges were: С = 2.6–3.0%; Cr = 10.0–20.0%; Mn = 10.0–15.0%; Ni = 0.5–1.7%; Si ≤ 1.3%; V ≤ 0.3%; Cu ≤ 0.3%.
It has been determined that an additional increase in the complex of properties of chromium-manganese alloys can be achieved by the additional introduction of molybdenum, titanium, barium and calcium in small amounts.
The peculiarities of the formation of the structure, phase composition and properties of the investigated chromium-manganese alloys in the cast state were. The change in the temperature intervals of the beginning and end of melting/crystallisation of alloys with different alloying systems was determined by thermal analysis. A comparative analysis of the melting/crystallisation temperature intervals revealed that the developed chromium-manganese alloys are characterised by lower energy consumption of the production process, and, therefore, are more technologically advanced in terms of achieving the required superheat temperature, subsequent casting into moulds and crystallisation.
According to the results of comparative tests for friction wear (temperature up to 950°C, load 500 N) and abrasive wear of chromium-manganese alloys with traditional analogue alloys in the cast state, it was found that the experimental material containing 3.10% C 13.10% Cr; 15.75% Mn; 1.15%Ni; 0.90% Si.
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