Improving of the wear resistance of working parts agricultural machinery by the implementation of the effect of self-sharpening

Abstract

The failure of the cutting elements of farm machinery is due to the blunting of cutting edges (increase of their radius) till the limit values. The most effective method for increasing the wear resistance of farm machinery is the realization of self-sharpening effect of the cutting elements. The testings took place in laboratory and field at the State Technical University of Kirovograd (Ukraine) in 2015. The technical equipment consists of the consolidated farmer plowshares by different methods as well as their samples, devices for measuring the wear resistance and thumbprint plowshares. It was determined the resistance to wear, the radius of curvature and the changing coefficient of the blades shape. The self-sharpening process was examined throughout the experiment. The results showed that the consolidated plowshares by the proposed technology (laser welding of the mixture (PS-14-60 + 6% В4С) compared to the traditional technology (volumetric heat treatment) have a blade radius 2.5 times lower, a wear 2.2 to 2.78 times lower and the self-sharpening process of the plowshares has been observed since the beginning of the wear until the time limit operation. The changing shape coefficient was respectively of 0.98 for the consolidated plowshares with alloy PS-14-60 + 6% B4C and 0.82 for those consolidated by volumetric heat treatment.

Studying the tribological properties of mated materials C61900 - A48-25BC1.25BNo. 25 in composite oils containing geomodifiers

“…It follows from the results of the research into the properties of Mg 6 Si 4 O 10 (OH) 8 geomodifiers [15]. It was determined that friction geomodifiers are based on a large group of minerals [16] that have similar chemical composition, where magnesium can be replaced with iron and nickel [17]. Serpentine rock includes several types of serpentine, magnetite and chromic inclusions, and the variation of chemical elements used as a mixture of geomodification compositions [18].…”

Determining the rational composition of tribologically active additive to oil to improve characteristics of tribosystems

“…The stressed-strained state is also possible to detect at friction by various non-destructive methods, namely, the methods of acoustic emission and a coercive force on working surfaces of parts [37]. The areas of stressed-strained state were found in the places of maximum wear, but to analyze the complete pattern of parts' wear, it is also necessary to study the area of minimum wear.…”

Change in Properties of M-10dm Mineral Motor Oil After Its Using in the Diesel Engine

“…This phenomenon is called "aging" and involves chemical, thermal and mechanical processes. However, the phenomenon as itself is still controversial and not fully understood [1][2][3].…”