Researches Concerning Friction Influence on Material Cold-Hardening in High Precision Stamping

Abstract:

The paper studies the cold-hardening phenomenon of material in high precision stamping. Level of material cold-hardening can be evaluated with thickness of cold-hardening stratum Δg (that may reach 0.2mm) and with its toughness (that may increase up to 1.8 times). For a correct conducing of high precision stamping process, is need to know, from designing stage, the way that different factors influence the piece material cold-hardening.The paper proposes the cold-hardening index IE that characterizes global and correct the cold-hardening level of stamped material. It was studied, for a large range of metallic materials (non-ferrous, carbon steels and allied steels), the way that tool-piece friction which varies from dry friction (μ=0.5) to limit friction (μ=0.05) influences value and evolution of cold-hardening index IE. The remark is that a reduced tool-piece friction goes to cold-hardening index IE increasing.

• Periodical: Applied Mechanics and Materials (Volume 658)
• Pages: 295-298
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.658.295
• Online since: October 2014
• Authors: Lucian Adrian Butnar*, Ioan Radu Sugar
• Keywords: Cold-Hardening, Cold-Hardening Index, Friction, High Precision Stamping, Stamped Material, Tool-Piece Contact

References

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