Effect of quenching temperature on microstructure and properties of arc microcast forged AerMet100 steel

doi:10.13251/j.issn.0254-6051.2023.02.019

Abstract

Abstract: Effect of different quenching temperatures in the range of 885-1150 ℃ on microstructure and mechanical properties of arc microcast forged AerMet100 ultra-high strength steel was investigated by means of OM, XRD, SEM, TEM and mechanical property tests. The results show that the original microstructure of the AerMet100 steel consists mainly of slatted martensite and austenite, and with rapid solidification characteristics. With the increase of quenching temperature, the solidification characteristics of the tested steel disappear gradually, and is almost completely eliminated when the temperature exceeds 1050 ℃. With quenching temperature increasing, the fracture toughness of the tested steel shows an increasing trend, while the tensile and yield strengths do not variation significantly, and the impact absorbed energy shows a tendency of first increasing and then decreasing, reaching a peak at 1050 ℃. In the experimental temperature range, quenching at around 1050 ℃ results in an excellent match of strength and toughness, with a fracture toughness of 82.9 MPa·m^1/2, a tensile strength of 2010 MPa, and an impact absorbed energy of 50 J.

Key words: arc microcast forging, AerMet100 steel, quenching temperature, microstructure, mechanical properties

CLC Number:

TG142.1

Xu Zhongzhi, Huang Shunzhe, Dai Jianke, Han Shun, Li Yong, Wang Chunxu, Zhang Haiou. Effect of quenching temperature on microstructure and properties of arc microcast forged AerMet100 steel[J]. Heat Treatment of Metals, 2023, 48(2): 124-130.

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