Effect of heating temperature on microstructure and properties of high-carbon low-alloy wear-resistant cast steel

doi:10.13251/j.issn.0254-6051.2025.04.036

Abstract

Abstract: High-carbon low-alloy wear-resistant cast steel was heated at 860-940 ℃ for 2 h with intermittent controlled air cooling and then followed by stress-relieving tempering at 550 ℃ for 2 h. The microstructure, hardness, and impact properties of the tested steel after heat treatment were observed and measured. The results show that with the increase of heating temperature, the hardness value of the tested steel shows a trend of first increasing and then decreasing, with a narrow range of 32.9-38.7 HRC. The impact absorbed energy shows an overall decreasing trend, and the fracture morphology transitions from ductile dimples and quasi cleavage to quasi cleavage. Within the heating temperature range of 860-940 ℃, the microstructure is composed of pearlite and carbides. However, as the heating temperature increases, the lamellar spacing of pearlite microstructure widens from 0.123 μm to 0.169 μm.

Key words: high-carbon low-alloy wear-resistant cast steel, heating temperature, microstructure, properties

CLC Number:

TG142.1

Wang Quan, Sun Tingting, Gao Siyuan, Wei Wenqiang. Effect of heating temperature on microstructure and properties of high-carbon low-alloy wear-resistant cast steel[J]. Heat Treatment of Metals, 2025, 50(4): 237-240.

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