High temperature oxidation behavior of pre-laid laser melting 45CrNiMoY alloy steel reinforced by TA15 powder

Mingwei Wei; Suiyuan Chen; Miao Sun; Jing Liang; Changsheng Liu; Mei Wang

doi:10.1117/12.2548092

18 December 2019 High temperature oxidation behavior of pre-laid laser melting 45CrNiMoY alloy steel reinforced by TA15 powder

Mingwei Wei, Suiyuan Chen, Miao Sun, Jing Liang, Changsheng Liu, Mei Wang

Author Affiliations +

Proceedings Volume 11333, AOPC 2019: Advanced Laser Materials and Laser Technology; 113331H (2019) https://doi.org/10.1117/12.2548092
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Effect of different TA15 powder additions on high temperature oxidation kinetics of pre-laid laser melting 45CrNiMoY alloy steel was studied. Thermogravimetric method was used to determine the kinetics curve of constant temperature oxidation of alloy steel sample at 700℃. The results show that bainite and acicular ferrite are the main microstructures of alloy steel after adding TA15 powder. With the increase of TA15 powder, the microstructures showed a distinct trend of refinement. The oxidation kinetics curves of alloy steels follow the linear law. The alloy steels with 1.0 wt.% TA15 powder have the best resistance to high temperature oxidation, and the oxidation rate constant is 1.48×10^-4 mg²·cm^-4·h^-1. Particle reinforcement phase formed in alloy steel can provide pinning effect for oxide film, while micro-cracks added in excess TA15 alloy steel sample are not conducive to the improvement of high temperature oxidation resistance.

Citation Download Citation

Mingwei Wei, Suiyuan Chen, Miao Sun, Jing Liang, Changsheng Liu, and Mei Wang "High temperature oxidation behavior of pre-laid laser melting 45CrNiMoY alloy steel reinforced by TA15 powder", Proc. SPIE 11333, AOPC 2019: Advanced Laser Materials and Laser Technology, 113331H (18 December 2019); https://doi.org/10.1117/12.2548092

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