Wear resistance factors of diamond-metal powder systems, obtained by explosive compaction

Abstract

It is relevant the task of development of matrixes from relatively cheap and non-deficient powders for synthesis of instrumental diamond-metal materials. Radically new prospects for this are provided by explosive compaction, the possibilities of which are little studied in the case of diamond-containing powder mixtures. The aim of the work is to analyze the influence of explosive compaction and subsequent heat treatment on the main factors determining the wear resistance of diamond composites with iron-carbon alloys matrix. The cylindrical loading scheme was used in experiments on explosive pressing; analytical studies were carried out by optical and scanning electron microscopy, microanalysis, etc. The compositions of two-component matrixes combining easily deformable and high-strength powders of iron-carbon alloys are proposed. The influence of synthesis modes on the structure and micromechanical characteristics of the matrix, the integrity of the diamond component, the elemental composition and morphology of the diamond-matrix boundary, the nature of the destruction of diamond particles during wear are analyzed. Comparative tests were carried out and it was shown that the wear resistance of experimental samples of diamond composites corresponds to the level of wear resistance of industrial diamond dressers, but at half the consumption of diamond raw materials.