Thermo-physical properties of tempered AerMet100 steel

doi:10.13251/j.issn.0254-6051.2022.06.032

Abstract

Abstract: Aermet100 steel is an advanced secondary hardening Ni-Co-Cr structural steel. The change of its density, thermal strain, elastic modulus, Poisson's ratio, thermal conductivity and flow stress with temperature were obtained by experiment, and the Ac₁ and Ac₃ for austenite transformation during heating, the Ms for martensite transformation and martensitic transformation coefficient K_m during cooling were obtained. Finally, based on the data of thermo-physical properties of the tempered AerMet100 steel, the simulation of gear quenching process was carried out by using SYSWELD finite element analysis. The results show that the room temperature microstructure of tempered AerMet100 steel consists of tempered martensite and residual austenite. In the heating process, the austenite reaction enthalpy is 42 600 J/kg, other thermal-physical parameters change non-linearly in the range of Ac₁-Ac₃, and different test states and heating rates leads to different values of Ac₁ and Ac₃. The Ms of the tempered AerMet100 steel quenched at different cooling rates is basically the same as about 213 ℃, and the K_m value is 0.011 736. The SYSWELD finite element simulation analysis results show that the thermal physical properties obtained from the test can be used for the heat treatment process simulation of the steel.

Key words: AerMet100 steel, thermo-physical parameters, phase transformation behavior, finite element analysis

CLC Number:

TG441.8

Jiao Qingyang, Zhao Dong, Wang Xinyu, Li Shijian. Thermo-physical properties of tempered AerMet100 steel[J]. Heat Treatment of Metals, 2022, 47(6): 168-172.

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