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<p>The effect of forced cooling on the dimensional and topological characteristics of the microstructure of a workpiece fabricated from steel 08G2S (A516-55) by additive argon-arc surface welding is investigated. The forced cooling is implemented using a specially designed water-cooled table with a fixed substrate for additive growth of the workpiece. The effect of the welding heat on formation of the microstructure is studied after using two cooling rates (3 and 5 L/min) and without cooling. The dimensional and topological characteristics (the grain size and the degree of anisotropy) are determined by computer microscopy using special software. The most effective cooling modes providing high dimensional and topological characteristics of the microstructure of the workpiece grown by the additive method are determined.</p>

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Effect of Cooling Rate on Dimensional and Topological Characteristics of Microstructure of Steel 08G2S (A516-55) Manufactured by Additive Argon-Arc Surfacing

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • K. V. Makarenko,
  • A. V. Vdovin,
  • A. G. Fedukov,
  • E. A. Zentsova,
  • M. A. Novikov,
  • A. V. Kirichek

摘要

The effect of forced cooling on the dimensional and topological characteristics of the microstructure of a workpiece fabricated from steel 08G2S (A516-55) by additive argon-arc surface welding is investigated. The forced cooling is implemented using a specially designed water-cooled table with a fixed substrate for additive growth of the workpiece. The effect of the welding heat on formation of the microstructure is studied after using two cooling rates (3 and 5 L/min) and without cooling. The dimensional and topological characteristics (the grain size and the degree of anisotropy) are determined by computer microscopy using special software. The most effective cooling modes providing high dimensional and topological characteristics of the microstructure of the workpiece grown by the additive method are determined.