Authors: E.E. Petrova, M.V. Pimonov, V.L. Knyazkov

Title of the article: Improvement of properties antifrictional of the surface machine parts of the mining equipment by detonation sputtering a mixture of powders of BrAZh9-4 and Al₂O₃

Year: 2015, Issue: 4, Pages: 60-66

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.793.7

DOI: -

Abstract: Antifriction alloys used for manufacturing machine parts of mining equipment have modest hardness they are frequently so are in the frenquetly deformation and are subject to accelerated wear. The research is aimed at the increasing hardness wear resistance and properties antifriction during the operation process of the surface machine parts of mining equipment, such as hydraulic cylinder bushings, joints boom bucket joints and gearings, etc., usually produced of copper-based alloys. The research showed impact samples surface modification made during the process of detonation sputtering this mixture of powders of PR-BrAZh9-4-3 and Al₂O₃. The percentage of powders in the sputtering mixture changed whose the ratio of 1: 9 ÷ 5: 5. To ensure the required values of microhardness the percentage of mixture powders PR-BrAЋ9-4-3 and Al2O3, must be 4: 6. When another ratio found significant variations of microhardness were found. Studies on the topography of the surface of the powder mixture were carried out with a scanning tunneling microscope. Rounded particles are detected whose size of which is about 1,25х0, 5х500 NM, this factor indicates the presence of unfused particles in sputtering Al2O3 particle. Metallographic study found that presence of modified alloy of two phases in the sputtered layer: α-phase and α + γ. The uneven distribution of microhardness on surface sputtered reveals certain drawbacks of the modification technology developed, such as difficulty of obtaining a uniform mixture composition with high technological characteristics, as well as the need to adjust the sputtering modes.

Key words: detonation sputtering ultrafinely divided particles of ceramics electron microscopy spectral analysis microhardness surface topography the microscopic studies

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