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<p>Tool steels find extensive use across various applications, with their mechanical properties, fracture toughness, and wear resistance heavily influenced by applied heat treatments. Conventionally, these steels are heated to the austenitizing temperature, followed by quenching to achieve desired attributes. Subsequent tempering processes are then employed to tailor properties for specific applications. In our study, we focused on cold-work tool steel 1.2379 (similar to AISI D2), subjecting it to austenitization at 1000°C for 1&#xa0;hour. One set of samples was quenched to 400°C and subsequently austempered for durations of 1, 2, and 3 hours. Another set underwent quenching to room temperature, followed by tempering for 2 hours at various temperatures (160°C, 270°C, and 550°C). The austempered, quenched, and tempered specimens underwent Charpy impact testing, hardness measurements, wear tests, and microstructural investigations. Our findings reveal that the austempered samples demonstrated comparable hardness (~55 HRc) and wear resistance (92%), while exhibiting a significant increase in impact toughness (About 3 times).</p>

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Investigating the potential of austempering for cold work steels: a comparative study on DIN 1.2379 tool steel

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Fatih Hayati Çakir,
  • Ferhat Ceritbinmez

摘要

Tool steels find extensive use across various applications, with their mechanical properties, fracture toughness, and wear resistance heavily influenced by applied heat treatments. Conventionally, these steels are heated to the austenitizing temperature, followed by quenching to achieve desired attributes. Subsequent tempering processes are then employed to tailor properties for specific applications. In our study, we focused on cold-work tool steel 1.2379 (similar to AISI D2), subjecting it to austenitization at 1000°C for 1 hour. One set of samples was quenched to 400°C and subsequently austempered for durations of 1, 2, and 3 hours. Another set underwent quenching to room temperature, followed by tempering for 2 hours at various temperatures (160°C, 270°C, and 550°C). The austempered, quenched, and tempered specimens underwent Charpy impact testing, hardness measurements, wear tests, and microstructural investigations. Our findings reveal that the austempered samples demonstrated comparable hardness (~55 HRc) and wear resistance (92%), while exhibiting a significant increase in impact toughness (About 3 times).