Abstract

As a rule, the main processes of friction surface destruction are contact fatigue damage, micro-contact grabbing wearing, abrasive, and oxide wearing. The considered mechanism of the mentioned processes proves that to reduce their intensity and harden friction surfaces it is effective to form surfaces of composite materials; containing Ni, Cr, Si, and Mn; hard structural inclusions (for example, a carbide phase); and a hard lubricant (for example, as molybdenum disulfide, calcium fluoride, and graphite). This paper presents studies on powders for thermal spraying of wear protection layers. The focus is on studies of the influence of the shape, size, and structure of mixed powders made of nickel and iron with dry lubricants, such as molybdenum disulfide and calcium fluoride, which are analyzed using SEM and metallographic methods. The examinations are supplemented by X-ray diffractometry. Paper includes a German-language abstract.

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