Qualitative Characteristics of МоS₂Solid-Lubricant Coating Formed by Vibro-Wave Impact of Free-Moving Indenters

Abstract

The purpose of the investigations carried out is the formation of qualitative nanostructured coatings and development of methods for their application on product surfaces. The principle of a staged study of regularities in the formation of vibration mechanical-chemical coatings from “top to bottom” and “bottom-up” formed a basis of a methodological approach to investigation carrying out. Experimental researches were carried out with the use of specially developed working chambers installed upon vibration machines. As an indenter there were used metal balls 2-5 mm in diameter and made of steel of ShH15 type, samples material – steel 45. The assessment of coating characteristics was carried out with the use of optical, raster scanning probe microscopy. It is determined through the result in the investigations of the impact-pulse interaction of a working environment part under conditions of vibration impact that there are grindings and changes in particles dimensions up to 100 nm and lesser in coating material which allows them to penetrate into micro-and nanocavities of basic metal and, in such a way, to form coating with high antifriction properties. The influence of amplitude-frequency properties of vibro-wave activation upon quality and performance attributes of coating surfaces and also process duration is determined.

Method for processing experimental strength data using statistical methods

“…Fatigue is characterized by a significantly greater effect on the resource of the part: the strength (hardness, endurance limit have a close directly proportional relationship) of steel and the effective stress in the dangerous section of the part are connected by a degree of m1 = 3-8 with its resource for the multi-cycle loading region [5].…”

“…Results of measuring the parts' hardness in MS Excel (parts' hardness) in logarithmic coordinates, and along the ordinate axis the values of the distribution function F(Fig. 3)[5].…”

Zinc Coating Obtained in the Result of the Mechanochemical Effects in Vibrodynamic the Setups of Various Types

“…As a result, less porosity, increased corrosion resistance and greater adhesion strength to the base metal are achieved. [5][6][7][8][9].…”

Technical Expertise to Establish the Cause of Fracture of Jaw Crusher Eccentric Shaft

“…• область В -зона остаточного разрушения (долома) сечения вала площадью около 30% поперечного сечения вала (светлого цвета с крупнозернистой структурой, не окисленная, имеет радиальные рубцы, характерные для быстрого разрушения металла) [5].…”

“…• area C -area of the residual destruction in the shaft of about 30% of the area of cross section of the shaft (light color with a coarse structure, not oxidized, has radial scars, characteristic to rapid destruction of the metal) [5].…”