Investigation of the Mechanical Properties of Intercritically Treated Ultra High Strength Steel

Abstract:

Intercritically treated ultra high strength steel was investigated using a continuous annealing simulator of the laboratory. The results have shown that the microstructure consists of a ferrite matrix with martensite. A satisfactory mechanical property was obtained by intercritical annealing and subsequent overaging. The specimen exhibited optimum R_m (1360MPa) and A_t (20%), a relatively low R_p0.2/R_m (0.72) and an ideal product of R_m and A_t (27200MPa%). Satisfactory mechanical properties of the present steel are attributed to the fact that the effect of dispersion strengthening of martensite islands as well as the contribution to strength by the softer phase, such as ferrite (retained austenite).

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 245-248
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.245
• Online since: May 2014
• Authors: Zhuang Li*, Di Wu, Huan Huan Yu, Lei Luo, Ming Liu
• Keywords: Intercritical Annealing, Mechanical Property, Overaging, Ultra High Strength

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