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<p>The sliding contact between aluminum alloy sheet and H13 steel in hot stamping often leads to severe wear and adhesive transfer, significantly degrading forming quality and tooling life. This study simulates the actual solution-forming-quenching process of hot stamping on a self-developed sheet-and-strip high-temperature friction tester. This study reveals the influence of different normal pressures on the thermal tribological behavior between three types of surface-modified H13 steel, quenched and tempered (Q&amp;T) H13 steel:Q&amp;T H13 steel combined with ion plasma nitriding (PN), and Q&amp;T H13 steel combined with PVD-TiN coating (PVD-TiN) and high-temperature aluminum alloy. The experimental results show that with the increase of normal pressure, the coefficient of friction increases and adhesive wear is aggravated. The average coefficient of friction is 1.18 at 3.6&#xa0;MPa and 1.34 at 5.4&#xa0;MPa. Both PVD-TiN coating and nitriding coating exhibit excellent friction-reducing performance under different pressure conditions. Under the medium pressure condition of 4.5&#xa0;MPa, the average coefficient of friction is 1.09 for PVD-TiN and 1.23 for PN, although the friction coefficient of the PVD-TiN surface-modified tool is lower than that of the surface nitrided tool, the adhesive wear is more severe than that of the surface nitrided tool because the thinner coating is prone to local spalling, exposing the fresh metal surface. However, the compounds such as Fe<sub>3</sub>N and Fe<sub>4</sub>N formed by nitriding treatment can effectively inhibit adhesion. Under the high-pressure condition of 5.4&#xa0;MPa, the PVD-TiN surface-modified tool not only maintains a lower friction coefficient, the friction coefficient decreased from 1.34 in the untreated state to 1.14, but also the TiN particles formed on its surface can significantly reduce adhesive wear, showing better performance than the surface nitrided tool. The latter, however, deteriorates the contact condition of the friction pair due to the formation of Fe-Cr alloy aggregate particles caused by plastic deformation.</p>

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Comparative Study on High-Temperature Friction and Wear Behavior of Differently Surface-Treated H13 Steel Die and 7075 Aluminum Alloy Sheets

  • 期刊论文

  • 发表日期：

    2026年7月18日

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  • Gaohui Ji,
  • Lanqin Yang,
  • Wurong Wang,
  • Yangyang Zhao,
  • Xicheng Wei

摘要

The sliding contact between aluminum alloy sheet and H13 steel in hot stamping often leads to severe wear and adhesive transfer, significantly degrading forming quality and tooling life. This study simulates the actual solution-forming-quenching process of hot stamping on a self-developed sheet-and-strip high-temperature friction tester. This study reveals the influence of different normal pressures on the thermal tribological behavior between three types of surface-modified H13 steel, quenched and tempered (Q&T) H13 steel:Q&T H13 steel combined with ion plasma nitriding (PN), and Q&T H13 steel combined with PVD-TiN coating (PVD-TiN) and high-temperature aluminum alloy. The experimental results show that with the increase of normal pressure, the coefficient of friction increases and adhesive wear is aggravated. The average coefficient of friction is 1.18 at 3.6 MPa and 1.34 at 5.4 MPa. Both PVD-TiN coating and nitriding coating exhibit excellent friction-reducing performance under different pressure conditions. Under the medium pressure condition of 4.5 MPa, the average coefficient of friction is 1.09 for PVD-TiN and 1.23 for PN, although the friction coefficient of the PVD-TiN surface-modified tool is lower than that of the surface nitrided tool, the adhesive wear is more severe than that of the surface nitrided tool because the thinner coating is prone to local spalling, exposing the fresh metal surface. However, the compounds such as Fe3N and Fe4N formed by nitriding treatment can effectively inhibit adhesion. Under the high-pressure condition of 5.4 MPa, the PVD-TiN surface-modified tool not only maintains a lower friction coefficient, the friction coefficient decreased from 1.34 in the untreated state to 1.14, but also the TiN particles formed on its surface can significantly reduce adhesive wear, showing better performance than the surface nitrided tool. The latter, however, deteriorates the contact condition of the friction pair due to the formation of Fe-Cr alloy aggregate particles caused by plastic deformation.