Precipitation Behavior of a Maraging Stainless Steel

Author:

Jiang Yue1,Ai Ying Ying1,Wang Qi Ting1

Affiliation:

1. Harbin University of Science and Technology

Abstract

The changes of precipitation phases and matrix structures in Fe-13Cr-7Ni-4Mo-4Co-2W maraging stainless steel at different temperature were studied by using the Thermo-Calc software. The research was on the microstructures and precipitation behaviors of the maraging stainless steel, the performance is investigated through solution and aging treatment by TEMand SADP. The calculation results were in good agreement with the experiments, which demonstrated that when maraging stainless steel was treated in high temperature, the Laves-Fe2Mo precipitates became totally dissolved as the temperature was above 1050°C, and about 8% of R phase was found during aging. The calculation provides a guiding significant to the establishment of reasonable heat treatment process and the development of new materials.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference6 articles.

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2. Y L Ding, J Su, J Y Chen, et al. Thermodynamic Calculation of Precipitates and Optimization of Strengthening Technology of Maraging Stainless Steel S-04. Journal of Iron and Steel Research. 2003, 15(6): 38-41.

3. M Hattestrand, J O Nilsson, K Stiller. Precipitation hardening in a 12%Cr–9%Ni–4%Mo–2%Cu stainless steel. Acta Materialia. 52(2004): 1023-1037.

4. M Schober, R Schnitzer, H Leitner. Precipitation evolution in a Ti-free and Ti-containing stainless maraging steel. Ultramicroscopy. 109(2009): 553-562.

5. S X Liu, P J Li, X Q Huang, D B Zeng, Y Z An, C F Lu. Precipitation Dynamics of Precipitate in High Co Re Hot Work Die Alloy Steel. Transactions of Materials and Heat Treatment. 2002, 23(3): 15-19.

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