Optimisation of Heat Treatment for Steel Stressed by Abrasive Erosive Degradation

Abstract

The aim of the present publication is the analysis of refined steels designed for conditions with increased abrasive stress (102Cr6, 54SiCr6, 25CrMo4 and 15230 – does not have DIN equivalent). These include mainly mechanical components used as replaceable parts in machines for tillage, such as plough blades and chisels. The experimental part is focused on the issue of heat treatment of steel materials, which are usually used for the production of machine parts intended for tools designed to withstand abrasive stress. The suitability of individual materials for the production of tools for tillage will be evaluated based on the results of mechanical tests. These include the analysis of the structure of the given material, its hardness (ČSN EN ISO 6508-1) and impact toughness (ČSN EN 10045-1). Microhardness of individual structural components was also measured. The analysis was processed on a metallographic microscope. The individual tests of abrasive resistance are divided between interaction of two objects and a combination of abrasive erosive wear. Laboratory tests were performed on an abrasive cloth (ČSN 01 5084) and in Bond’s drum apparatus (this experiment is not standardized). Based on the results of the individual measurements it is possible to make recommendation of a suitable heat treatment of tested materials for environments with considerable abrasive stress.

Keywords

• heat treatment
• erosive degradation
• abrasive wear
• steel
• fracture
• microhardness