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胀形对TC4合金环锻件残余应力及分布的影响
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西北工业大学材料学院

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中图分类号:

TG319

基金项目:

中央高校基本科研业务费专项资金项目3102019ZX004


Effect of bulging process on residual stress of TC4 alloy ring forgings
Author:
Affiliation:

Northwestern Polytechnical University,Xi’an

Fund Project:

Fundamental Research Funds for the Central Universities3102019ZX004

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    摘要:

    对TC4合金辗轧环锻件残余应力进行了测试,分析了胀形技术对TC4合金辗轧环锻件残余应力及分布的影响。结果表明,采用绘制雷达图的方式可对环形件残余应力大小和分布均匀性进行有效表征和分析,采用胀形技术可实现辗轧环件的残余应力调控。现有辗轧及胀形工艺下,TC4合金环件表面残余应力均为残余压应力,且在-50~-150MPa范围内波动;残余应力分布雷达图存在“尖角”,胀形后“尖角”趋于平缓;经胀形处理后环件残余应力均值略有降低,周向应力较轴/径向应力的降幅更加显著,内环面与上端面周向应力经胀形后应力均值降幅分别达24.8%与20.2%;经胀形处理后环件残余应力均匀性整体有所提高;仅下端面周向应力大小及分布均匀性改善效果不明显。

    Abstract:

    The residual stresses in the ring forgings were tested and described using radar charts. The effects of bulging process forming on residual stress and distribution along ciucumference were analyzed. The results show that radar charts can be used to describe effectively the values and distributions of residual stresses along ciucumference for the ring forgings. And the bulging process forming is an effective way to adjust the residual stress and distribution in the ring forgings. For the ring forgins in this paper, residule stresses are compressive stress and in the range of -50~-150MPa. A sharp area exists in each radar chart and is weakened after bulging process forming. The hoop stresses are relaxed much more than the axial stress and especially on the inner and bottom end surface about 24.8% and 20.2%. The distribution uniformity of residul stress is improved except for the bottom end surface.

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魏志坚,李金山,吕楠,杨艳慧.胀形对TC4合金环锻件残余应力及分布的影响[J].稀有金属材料与工程,2019,48(8):2537~2543.[Wei Zhijian, Li Jinshan, Lv Nan, Yang Yanhui. Effect of bulging process on residual stress of TC4 alloy ring forgings[J]. Rare Metal Materials and Engineering,2019,48(8):2537~2543.]
DOI:10.12442/j. issn.1002-185X.20190204

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  • 收稿日期:2019-03-13
  • 最后修改日期:2019-04-10
  • 录用日期:2019-04-23
  • 在线发布日期: 2019-09-05
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