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<p>In order to reveal the evolution laws of the microstructure and mechanical properties of metal discs during rotary forging forming and heat treatment processes. This study analyzed the organizational composition, grain size as well as the distribution laws and variation trends of strength, hardness, elongation and toughness of metal discs after double-roller rotary forging and heat treatment. The results indicate that for the metal discs after rotary forging forming, their organizational components remain unchanged, still being ferrite and pearlite. However, the uniformity of the distribution of the two phases becomes poorer, and the average equivalent grain size is refined from 33.2 to 12.49&#xa0;μm. After tempering of the metal discs, the sizes of the ferrite structures are close to each other, the sizes and distributions of cementite particles are relatively consistent, and the anisotropy is minimized. Compared with the initial discs, the yield strength of the tempered discs increases by 52.1-105.5%, the tensile strength increases by 18.5-39.1%, the hardness increases by 14.9-23.7%, and the impact toughness increases by 170.3-236.0%. </p>

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Evolution of Microstructure and Mechanical Properties of Double-Roll Rotary Forging of Large-Diameter Thin-Walled Metal Discs

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Zhongquan Yu,
  • Shengqiang Hu,
  • Yingping Qian,
  • Chundong Zhu

摘要

In order to reveal the evolution laws of the microstructure and mechanical properties of metal discs during rotary forging forming and heat treatment processes. This study analyzed the organizational composition, grain size as well as the distribution laws and variation trends of strength, hardness, elongation and toughness of metal discs after double-roller rotary forging and heat treatment. The results indicate that for the metal discs after rotary forging forming, their organizational components remain unchanged, still being ferrite and pearlite. However, the uniformity of the distribution of the two phases becomes poorer, and the average equivalent grain size is refined from 33.2 to 12.49 μm. After tempering of the metal discs, the sizes of the ferrite structures are close to each other, the sizes and distributions of cementite particles are relatively consistent, and the anisotropy is minimized. Compared with the initial discs, the yield strength of the tempered discs increases by 52.1-105.5%, the tensile strength increases by 18.5-39.1%, the hardness increases by 14.9-23.7%, and the impact toughness increases by 170.3-236.0%.