Version 1
: Received: 11 May 2023 / Approved: 11 May 2023 / Online: 11 May 2023 (12:16:26 CEST)
How to cite:
Sun, J.; Li, K.; Hao, Z.; Xu, B. Effect of Austenitizing Heating Rate and Tempering Time on the Microstructure and Mechanical Property of an Ultrahigh-Strength Martensitic Steel Wire. Preprints2023, 2023050850. https://doi.org/10.20944/preprints202305.0850.v1
Sun, J.; Li, K.; Hao, Z.; Xu, B. Effect of Austenitizing Heating Rate and Tempering Time on the Microstructure and Mechanical Property of an Ultrahigh-Strength Martensitic Steel Wire. Preprints 2023, 2023050850. https://doi.org/10.20944/preprints202305.0850.v1
Sun, J.; Li, K.; Hao, Z.; Xu, B. Effect of Austenitizing Heating Rate and Tempering Time on the Microstructure and Mechanical Property of an Ultrahigh-Strength Martensitic Steel Wire. Preprints2023, 2023050850. https://doi.org/10.20944/preprints202305.0850.v1
APA Style
Sun, J., Li, K., Hao, Z., & Xu, B. (2023). Effect of Austenitizing Heating Rate and Tempering Time on the Microstructure and Mechanical Property of an Ultrahigh-Strength Martensitic Steel Wire. Preprints. https://doi.org/10.20944/preprints202305.0850.v1
Chicago/Turabian Style
Sun, J., Zhe Hao and Bin Xu. 2023 "Effect of Austenitizing Heating Rate and Tempering Time on the Microstructure and Mechanical Property of an Ultrahigh-Strength Martensitic Steel Wire" Preprints. https://doi.org/10.20944/preprints202305.0850.v1
Abstract
In this paper, a new method by combining cold drawing and martensitic transformation was proposed to produce ultrahigh-strength steel wire, and the effect of austenitizing heating rate on microstructure and mechanical properties was studied. Compared with Muffle furnace heating, salt bath heating has a much higher austenitizing heating rate, which is beneficial to obtain ultrafine-grained martensite for steel wire with a larger section. By salt bath hardening and low-temperature tempering, an ultrahigh strong (strength of 2.48 GPa) and tough (elongation of 6.0%) steel wire was produced. Moreover, to explore whether is it possible to replace long-time low-temperature tempering with short-time tempering at elevated temperatures to improve the tempering efficiency, the effect of tempering time on the evolution of microstructure and mechanical properties of the steel wires tempered at 350 °C was systematically studied. The results demonstrate that tempering at 350 °C for 30 s can endow the steel wire with comparable mechanical properties to that of the one tempered at 250 °C for 2 h. With tempering time prolonging, the strength decreases gradually with the precipitated phase transition from χ-Fe5C2 carbide into θ-Fe3C carbide and coarsening, which plays a major role in the strength decrease.
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
