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<p>Railway transportation and the manufacturing of railway wheels hold significant economic and safety value. Machining ER7 standard steel for manufacturing railway wheels through chip removal techniques significantly affects the tool life of the tools and the processing time. This study analyzed the parameters used in the production of ER7 standard railway wheels and the lifespan of the tools. Machining operations were applied to the midsections of train wheels. In these processes, three different constant cutting speeds (50&#xa0;m/min, 55&#xa0;m/min, and 60&#xa0;m/min) and four different cutting tools (two coated and two uncoated) were used. Furthermore, the cutting tools used were experimentally compared in both their deep cryogenic heat-treated and non-cryogenic heat-treated states. This study investigated the effect of these variables on cutting tool life, tool microstructure, and hardness. Cryogenic treatment of the same tool increased tool life by approximately 2.8 times at maximum coated tool life. Furthermore, it was observed that the minimum tool life obtained without cryogenic treatment increased by approximately 2.3 times after cryogenic treatment.</p>

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Cryogenic Treatment and Cutting Speed Effects on Tool Life in ER7 Train Wheel Machining

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Semih Doğan,
  • Abdullah Uğur,
  • Hasan Gökkaya,
  • Ali Riza Motorcu,
  • Gökhan Sur

摘要

Railway transportation and the manufacturing of railway wheels hold significant economic and safety value. Machining ER7 standard steel for manufacturing railway wheels through chip removal techniques significantly affects the tool life of the tools and the processing time. This study analyzed the parameters used in the production of ER7 standard railway wheels and the lifespan of the tools. Machining operations were applied to the midsections of train wheels. In these processes, three different constant cutting speeds (50 m/min, 55 m/min, and 60 m/min) and four different cutting tools (two coated and two uncoated) were used. Furthermore, the cutting tools used were experimentally compared in both their deep cryogenic heat-treated and non-cryogenic heat-treated states. This study investigated the effect of these variables on cutting tool life, tool microstructure, and hardness. Cryogenic treatment of the same tool increased tool life by approximately 2.8 times at maximum coated tool life. Furthermore, it was observed that the minimum tool life obtained without cryogenic treatment increased by approximately 2.3 times after cryogenic treatment.