Effect of austenitizing temperature on microstructure and properties of a high-speed cobalt steel
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Yongliang Pan
Yongliang Pan, born in 1996, is a master candidate of Beijing University of Technology, China. He obtained his bachelor’s degree at the School of Materials Science and Engineering at Shandong Jianzhu University in 2019. His research interests mainly focus on wear-resistant alloy materials and Characterization.
Naibo Yuan, born in 1972, is the deputy general manager and senior engineer of Xingtai Delong Machinery Roll Co., Ltd. He obtained his master’s degree from the school of materials science and engineering at Beijing University of Science and Technology in 1999. His research interests mainly focus on roll material. By now, he has published over 20 technical papers and holds 12 invention patents in China.
Tiejun Ma, born in 1992, is now an experimenter at Beijing University of technology, China. He obtained his master’s degree at the school of Materials Science and Engineering at Beijing University of Technology in 2019. His main research field is microstructure characterization of metal materials.
Abstract
The effect of different austenitizing temperatures on the type, morphology, distribution of carbides and martensite content in cobalt high-speed steel is characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and energy dispersive spectrometry. The results show that the eutectic MC carbides hardly dissolve during austenitizing process, and the lamellar M2C carbides decompose into MC and M6C carbides at 1100 °C. A large amount of M23C6 carbides uniformly distributed on the matrix are dissolved into austenite at 1100 °C. With the increase of austenitizing temperature, alloy element dissolves into matrix and the effect of solid solution strengthening of martensite enhances, which increases the hardness of cobalt high-speed steel. However, when the austenitizing temperature exceeds 1050 °C, the excess alloying elements in the matrix reduce the Ms point and increase the volume fraction of retained austenite, resulting in decrease of hardness of cobalt high-speed steel. The peak hardness with 66.4 HRC appears when the austenitizing temperature reaches 1050 °C.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 52075010
Funding source: Hebei Science and Technology Major Project
Award Identifier / Grant number: 21281003Z
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: Unassigned
About the authors
Yongliang Pan, born in 1996, is a master candidate of Beijing University of Technology, China. He obtained his bachelor’s degree at the School of Materials Science and Engineering at Shandong Jianzhu University in 2019. His research interests mainly focus on wear-resistant alloy materials and Characterization.
Naibo Yuan, born in 1972, is the deputy general manager and senior engineer of Xingtai Delong Machinery Roll Co., Ltd. He obtained his master’s degree from the school of materials science and engineering at Beijing University of Science and Technology in 1999. His research interests mainly focus on roll material. By now, he has published over 20 technical papers and holds 12 invention patents in China.
Tiejun Ma, born in 1992, is now an experimenter at Beijing University of technology, China. He obtained his master’s degree at the school of Materials Science and Engineering at Beijing University of Technology in 2019. His main research field is microstructure characterization of metal materials.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The authors would like to thank the financial support for this work from Hebei Science and Technology Major Project (21281003Z) and National Natural Science Foundation of China (52075010).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Effect of heat treatment on the electrical and mechanical properties of a Cu–Ni–Si cast alloy
- Effect of isothermal heat treatments under Ms temperature on the microstructures and mechanical properties of commercial high-silicon spring steel
- Effect of austenitizing temperature on microstructure and properties of a high-speed cobalt steel
- Effect of hot rolling process parameters on the microstructure and mechanical properties of continuously cooled low-carbon high-strength low-alloy (HSLA) steel
- Mechanical and tribological properties of a WC-based HVOF spray coated brake disc
- Microstructure and mechanical properties of AISI 304/DUROSTAT 500 steel double-sided TIG welds
- A Nelder Mead-infused INFO algorithm for optimization of mechanical design problems
- Modeling of hexagonal honeycomb hybrids for variation of Poisson’s ratio
- Effect of elevated test temperature on the tensile strength and failure mechanism of hot-pressed dissimilar joints of laser ablation-treated AA5754-H111 and thermoplastic composite
- Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys
- Improvement of incremental sheet metal forming with the help of a pressurised fluid system
- Nugget formation, microstructural features and strength of resistance spot welded cold-rolled dual-phase steel lap joints for automotive applications
- African vultures optimization algorithm for optimization of shell and tube heat exchangers
- Effect of welding current on properties of activated gas tungsten arc super duplex stainless steel welds
Articles in the same Issue
- Frontmatter
- Effect of heat treatment on the electrical and mechanical properties of a Cu–Ni–Si cast alloy
- Effect of isothermal heat treatments under Ms temperature on the microstructures and mechanical properties of commercial high-silicon spring steel
- Effect of austenitizing temperature on microstructure and properties of a high-speed cobalt steel
- Effect of hot rolling process parameters on the microstructure and mechanical properties of continuously cooled low-carbon high-strength low-alloy (HSLA) steel
- Mechanical and tribological properties of a WC-based HVOF spray coated brake disc
- Microstructure and mechanical properties of AISI 304/DUROSTAT 500 steel double-sided TIG welds
- A Nelder Mead-infused INFO algorithm for optimization of mechanical design problems
- Modeling of hexagonal honeycomb hybrids for variation of Poisson’s ratio
- Effect of elevated test temperature on the tensile strength and failure mechanism of hot-pressed dissimilar joints of laser ablation-treated AA5754-H111 and thermoplastic composite
- Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys
- Improvement of incremental sheet metal forming with the help of a pressurised fluid system
- Nugget formation, microstructural features and strength of resistance spot welded cold-rolled dual-phase steel lap joints for automotive applications
- African vultures optimization algorithm for optimization of shell and tube heat exchangers
- Effect of welding current on properties of activated gas tungsten arc super duplex stainless steel welds
