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Effect of Die Strength and Work Piece Strength on the Wear of Hot Forging Dies

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Abstract

The effect of the strength ratio extracted from an Archard model for wear is used to describe the wear rates expected in hot forging dies. In the current study, the strength ratio is the strength of the hot forging die to the strength of the work piece. Three hot forging die steels are evaluated. The three die steels are FX, 2714, and WF. To determine the strength of the forging die, a continuous function has been developed that describes the yield strength of three die steels for temperatures from 600 to 700 °C and for times up to 20 h (i.e., tempering times of up to 20 h). The work piece material is assumed to be AISI 1045. Based on the analysis, the wear resistance of WF should be superior and FX should be slightly better than 2714. Decreasing the forging temperature increases the strength ratio, because the strength of the die surface increases faster than the flow strength of AISI 1045. The increase in the strength ratio indicates a decrease in the expected wear rate.

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Acknowledgments

A. Finkl & Sons are thanked for supplying the experimental steels. G. Brada of Finkl is appreciated for a number of helpful discussions.

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Authors and Affiliations

  1. B.S. Levy Consultants, 1700 E. 56th St., Suite 3705, Chicago, IL, 60637, USA

    B. S. Levy

  2. Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO, 80401, USA

    C. J. Van Tyne

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  1. B. S. Levy
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Correspondence to C. J. Van Tyne.

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Levy, B.S., Van Tyne, C.J. Effect of Die Strength and Work Piece Strength on the Wear of Hot Forging Dies. J. of Materi Eng and Perform 24, 416–425 (2015). https://doi.org/10.1007/s11665-014-1292-1

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  • DOI: https://doi.org/10.1007/s11665-014-1292-1

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