Classification of austenitic manganese steels for parts of mining and processing equipment

Abstract The study analyzed the operating conditions of the replacement parts of mining and processing equipment. It has been established that during normal operation, replacement parts made of Hadfield steel (1.1C-13Mn) fail due to abrasive wear. Premature destruction of parts occurs due to cracking (or other causes) as a result of abnormal situations during operation or poor quality casting. Depending on the degree of static or dynamic load under abrasive wear conditions, it is proposed to divide replacement parts into three groups: especially critical, critical, and general purpose. For parts of the second and, especially, the third group, it is possible to use steels with a reduced manganese content compared to Hadfield steel. Based on the experimental dependence of the amount of forming alpha-martensite on the degree of plastic uniaxial deformation, a classification of the stability of austenite into martensite transformation is proposed. The classification consists of three levels: unstable (steel 1.1C-8Mn), metastable (steel 1.1C-10Mn) and stable (steels 1.1C-13Mn and 1.2C-18Mn) austenite.