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<p>The microstructure and the hardness of hot-rolled structural steel 50KhFA (0.50-Cr-V)are studied after the employed and newly developed cyclic annealing modes. It is shown that it is impossible to obtain a 100% granular pearlite structure in hot-rolled steel after annealing from the initial ferrite-pearlite condition with typical distribution of the carbide phases. The suggested novel mode of cyclic annealing is more effective, because it provides a more uniform distribution of granular pearlite over the entire cross-section of the annealed rolled product and a significant decrease in the hardness. The new annealing mode is recommended for metallurgical production.</p>

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Effect of Cyclic Annealing Mode on Microstructure and Hardness of Structural Steel 50KhFA

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • I. D. Pospelov,
  • D. V. Matveeva,
  • Ya. D. Bunina

摘要

The microstructure and the hardness of hot-rolled structural steel 50KhFA (0.50-Cr-V)are studied after the employed and newly developed cyclic annealing modes. It is shown that it is impossible to obtain a 100% granular pearlite structure in hot-rolled steel after annealing from the initial ferrite-pearlite condition with typical distribution of the carbide phases. The suggested novel mode of cyclic annealing is more effective, because it provides a more uniform distribution of granular pearlite over the entire cross-section of the annealed rolled product and a significant decrease in the hardness. The new annealing mode is recommended for metallurgical production.