The Hardness Changing Regularity of Quenched-Steel in Tempering Process and Its Double-Exponential Model

Abstract:

The transformation of tempering for quenched steel corresponded to complicated process of phase transformation, and mechanical properties of quenched-and-tempered steel were related to the phase transformation. In practice, hardness test was adopted to judge whether the properties of tempered-parts qualified because of its facility. Numerous researches indicated that, there existed correlativity expressed by different function forms between tempering hardness of quenched-steel and its tempering parameters. However, considering physical metallurgy of tempering process, the adoption of double-exponential function would help to describe regularity of hardness changing more exactly for quenched-steel during tempering process. Additionally, results of hardness tests for isothermal tempering and molding/simulation researches have shown that, the model of double-exponential function, which can reflect decline law of tempering hardness for quenched-steel, would provide basis for optimization design of tempering parameters, performance prediction of tempered-parts, and energy-saving heat-treatment on tempering process.

• Periodical: Advanced Materials Research (Volumes 146-147)
• Pages: 1578-1582
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.146-147.1578
• Online since: October 2010
• Authors: Cong Sheng Guo, Shu Ming Long, Hai Wa Bo, Hong Bin Tan
• Keywords: Double-Exponential Function, Quenched-Steel, Regularity of Hardness Changing, Tempering

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