Effects of Heat Treatment Process on Microstructure and Mechanical Properties of 31Mn2SiREB Cast Steel

Abstract:

The heat treatment process of 31Mn2SiREB cast steel used in crawler shoes is directly lifted from the heat treatment process of Mn13 high-manganese cast steel, i. e., quenching at 1050 oC after casting. The reasonableness of the process needs to be surveyed. In this paper, the effects of quenching temperature and diffusion annealing pre-treatment on mechanical properties, micro-area composition uniformity and micro-hardness uniformity were investigated. For quenching after casting, the tensile strength and impact energy increase observably with the elevation of quenching temperature, but the impact energy at higher quenching temperature is still very small. The fluctuation of micro-hardness and chemical composition at different micro-areas becomes obviously small with the increase of quenching temperature. For quenching after a diffusion annealing pre-treatment, the impact energy is very high and up to 36.3 J.

• Periodical: Materials Science Forum (Volume 762)
• Pages: 418-423
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.762.418
• Online since: July 2013
• Authors: Feng Zhang Ren, Feng Jun Li, Ling Bai, Yun Fei Wang
• Keywords: Crawler Shoe, Impact Energy, Micro-Area Chemical Composition, Microstructural Homogeneity, Quenching Temperature

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