METHOD OF MEASURING THE WEAR OF METAL MATERIALS AND COATINGS Russian patent published in 2019 - IPC G01N3/56 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of studying the mechanical properties of materials, in particular to the measurement of the wear of metallic materials and coatings. Craters are made in the test specimen using a diamond indenter in the form of a tetrahedral pyramid, with the specimen moving under it and then measuring the wear parameters. Craters are made by moving the specimen along the perpendicular to the vector of the displacement velocity of the counter piece during friction. Movement of the specimen is carried out with a speed of 8÷10 mm/s to a distance greater than the width of the friction surface along the perpendicular to the sliding speed, the distance being determined from the ratio L=kY, and the amount of wear determined from relation Δh=h-h₁=Ctg(α/2)(b₀-b₁), where L – distance greater than the width of the friction surface. K = 1.5÷2.0 – coefficient of overlap of the friction surface of the specimen, which characterizes the value indicating how much crater is longer than the width of the friction zone. Y – friction surface width along the perpendicular to the sliding velocity (mm), h – initial depth of the crater (mcm), h₁ – depth of the worn crater (mcm), Δh – amount of wear (mcm), b₀ – initial crater width (mcm), b₁ – width of the worn crater (mcm), α – angle between the surfaces of the walls of the crater.

EFFECT: shortening the cycle of the measurement operation while maintaining the accuracy of measuring the amount of wear.

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