Hardness Prediction of Wind Turbine Components Considering the Tempering Effect
How to Cite?
Jong Soo Park, Seung Woo Kim, Hyoung Woo Lee, Ki Bong Han, Jin Mo Lee, Jong Hun Kang, "Hardness Prediction of Wind Turbine Components Considering the Tempering Effect," International Journal of Engineering Trends and Technology, vol. 70, no. 3, pp. 54-65, 2022. Crossref, https://doi.org/10.14445/22315381/IJETT-V70I1P207
This study investigated the internal hardness and strength prediction of the main shaft component of large-scale wind turbines according to the heat treatment condition. In order to consider the mass effect from the cooling of large-scale components, cooling specimens were fabricated to carry out the hardenability test and tempering at 600? and 660?. The specimen hardness after quenching and tempering was measured by investigating the hardness distribution according to the distance from the Quench end. The quenched hardness variation of the large-scale cooling specimen was predicted for various locations using Deform and Jmatpro and compared with experiment results. For the hardness after tempering, the softening phenomenon from the experiment was formulated using the tempering parameter. The hardness was analyzed through fractured specimens for various locations of the main shaft manufactured by open die forging to determine the validity of the calculation formula. Comparison of the hardness and formula results revealed that reliable hardness prediction is possible using the proposed formula.
Tempering Parameter, Holloman Jaffe Parameter, Jominy test, Mass effect, Hardness, Tensile strength.
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