Investigation of Working Capacity and Wear Resistance of Surface Coatings of Cast Steel Machine Parts

This article discusses wear-resistant materials for cast steel parts of machines and equipment used in automotive and agricultural machinery construction. Special samples with a wear resistant hard-alloy coating with a layer thickness of 2-3 mm or more, obtained by casting on expanded polystyrene gasified models, are presented. The chemical compositions of various steel grades studied are given. Tests for abrasive wear of samples were performed before and after optimal heat treatment with double phase recrystallization. It is shown that optimal heat treatment with double phase recrystallization increases the hardness and wear resistance of cast samples and parts by 3-4 times in comparison with serial products.