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Volume 18
Issue 17
10.3390/ma18173999
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Optimized Hot Pressing of High-Speed Steel–Bronze Composites for Diamond-Reinforced Tool Applications

by
Filip Průša
1,2,*,
Andrzej Romański
2,
Marzanna Książek
3,
Hana Thürlová
1,
Dorota Tyrała
2,
Petr Kratochvíl
1,
Janusz Konstanty
2,
Ilona Voňavková
1,
František Růžička
1,
Jan Riedl
1,
Robert Dąbrowski
2,
Krzyzstof Sołek
2,
Jan Pokorný
1 and
Lucyna Renata Jaworska
2
1
Department of Metals and Corrosion Engineering, University of Chemistry and Technology, Technicka 5, 166 28 Prague 6, Czech Republic
2
Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, Mickiewicza 30 Av., 30-059 Krakow, Poland
3
Faculty of Non-Ferrous Metals, AGH University of Krakow, Mickiewicza 30 Av., 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Materials 2025, 18(17), 3999; https://doi.org/10.3390/ma18173999
Submission received: 14 July 2025 / Revised: 17 August 2025 / Accepted: 18 August 2025 / Published: 26 August 2025
(This article belongs to the Special Issue Properties, Processing and Applications of Diamond and Related Superhard Materials)
Versions Notes

Abstract

This study investigates the optimization of hot-pressing parameters for ASP60 high-speed steel composites incorporating CuSn20 bronze alloy for use in diamond-reinforced tool applications. ASP60 and CuSn20 powders were characterized using XRD, XRF, DSC, SEM, and laser diffraction. The effects of CuSn20 addition at varying concentrations and compaction temperatures (950–1050 °C) on porosity, mechanical properties, and tribological performance were evaluated. Results showed that adding CuSn20 significantly reduced residual porosity due to its partial melting during compaction, which facilitated particle rearrangement and densification. Optimal conditions were identified at 1050 °C with 9.8 wt.% CuSn20, yielding minimal porosity (~3.7%) and the highest bending strength (374.51 ± 36.73 MPa). The optimized matrix was further reinforced with TiC-coated diamond particles at concentration c = 20, producing a composite material with excellent wear resistance, despite minor defects in the TiC coating observed on fracture surfaces. Tribological testing demonstrated that CuSn20 consistently lowered friction coefficients across all tested temperatures due to its self-lubricating properties and partial melting at elevated temperatures. Furthermore, ASP60 exhibited no measurable wear, making it a promising candidate for highly demanding applications. Overall, the study demonstrates that CuSn20 alloy enhances densification, mechanical performance, and tribological behavior of ASP60-based composites, indicating their strong potential for aggressive wire sawing and stone-cutting tool applications.
Keywords: ASP60 high-speed steel; hot pressing; bending tests; hardness; porosity; friction coefficients; optimized compaction conditions ASP60 high-speed steel; hot pressing; bending tests; hardness; porosity; friction coefficients; optimized compaction conditions

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MDPI and ACS Style

Průša, F.; Romański, A.; Książek, M.; Thürlová, H.; Tyrała, D.; Kratochvíl, P.; Konstanty, J.; Voňavková, I.; Růžička, F.; Riedl, J.; et al. Optimized Hot Pressing of High-Speed Steel–Bronze Composites for Diamond-Reinforced Tool Applications. Materials 2025, 18, 3999. https://doi.org/10.3390/ma18173999

AMA Style

Průša F, Romański A, Książek M, Thürlová H, Tyrała D, Kratochvíl P, Konstanty J, Voňavková I, Růžička F, Riedl J, et al. Optimized Hot Pressing of High-Speed Steel–Bronze Composites for Diamond-Reinforced Tool Applications. Materials. 2025; 18(17):3999. https://doi.org/10.3390/ma18173999

Chicago/Turabian Style

Průša, Filip, Andrzej Romański, Marzanna Książek, Hana Thürlová, Dorota Tyrała, Petr Kratochvíl, Janusz Konstanty, Ilona Voňavková, František Růžička, Jan Riedl, and et al. 2025. "Optimized Hot Pressing of High-Speed Steel–Bronze Composites for Diamond-Reinforced Tool Applications" Materials 18, no. 17: 3999. https://doi.org/10.3390/ma18173999

APA Style

Průša, F., Romański, A., Książek, M., Thürlová, H., Tyrała, D., Kratochvíl, P., Konstanty, J., Voňavková, I., Růžička, F., Riedl, J., Dąbrowski, R., Sołek, K., Pokorný, J., & Jaworska, L. R. (2025). Optimized Hot Pressing of High-Speed Steel–Bronze Composites for Diamond-Reinforced Tool Applications. Materials, 18(17), 3999. https://doi.org/10.3390/ma18173999

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