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The evaluation of the fatigue propertyProperties of automotive components is crucial for the durability design of vehicles. For the tubes aimed to the truck skateboard chassis manufactured via the hot roll bending processProcess, it is necessary to investigate their fatigue propertyProperties. In the present study, bench fatigue tests were conducted on the 22MnB5 hot roll bending tubesHot roll bending tube with various corrosionCorrosion resistance (namely, bare tubes, electro-galvanized tubes, and hot-dip galvanized tubes) to comparatively study their high cycle fatigue propertyHigh cycle fatigue property. The results revealed that microcracks existed on the surface of both the bare and electro-galvanized tubes, triggering the final fatigue failure. That is to say, the surface microcracks could produce an adverse impact on their fatigue propertyProperties. On the contrary, the microcracks on the surface of those hot-dip galvanized tubes could be successfully healed by liquid Zn during the hot-dip processProcess, resultantly improving their fatigue propertyProperties.

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Comparative Study on the High Cycle Fatigue Property of the 22MnB5 Hot Roll Bending Tubes with Various Corrosion Resistance

  • 会议论文

  • 发表日期：

    2026年

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  • Jingxi Yuan,
  • Bolong Li,
  • Lei Shi,
  • Zhihui Yang,
  • Yulai Gao

摘要

The evaluation of the fatigue propertyProperties of automotive components is crucial for the durability design of vehicles. For the tubes aimed to the truck skateboard chassis manufactured via the hot roll bending processProcess, it is necessary to investigate their fatigue propertyProperties. In the present study, bench fatigue tests were conducted on the 22MnB5 hot roll bending tubesHot roll bending tube with various corrosionCorrosion resistance (namely, bare tubes, electro-galvanized tubes, and hot-dip galvanized tubes) to comparatively study their high cycle fatigue propertyHigh cycle fatigue property. The results revealed that microcracks existed on the surface of both the bare and electro-galvanized tubes, triggering the final fatigue failure. That is to say, the surface microcracks could produce an adverse impact on their fatigue propertyProperties. On the contrary, the microcracks on the surface of those hot-dip galvanized tubes could be successfully healed by liquid Zn during the hot-dip processProcess, resultantly improving their fatigue propertyProperties.