东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (1): 84-89.DOI: 10.12068/j.issn.1005-3026.2020.01.015

• 机械工程 • 上一篇    下一篇

镍基单晶高温合金的微孔加工对比实验研究

巩亚东， 孟凡涛， 孙瑶， 于兴晨   

  1. (东北大学 机械工程与自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2019-04-01 修回日期:2019-04-01 出版日期:2020-01-15 发布日期:2020-02-01
  • 通讯作者: 巩亚东
  • 作者简介:巩亚东(1958-)，男，辽宁本溪人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51775100)； 中央高校基本科研业务费专项资金资助项目(N180303028).

Experimental Study on Micro-hole Processing of Nickel-Based Single Crystal Superalloy

GONG Ya-dong， MENG Fan-tao， SUN Yao， YU Xing-chen   

  1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2019-04-01 Revised:2019-04-01 Online:2020-01-15 Published:2020-02-01
  • Contact: GONG Ya-dong
  • About author:-
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摘要： 开展镍基单晶高温合金微孔加工实验研究，探讨不同直径、不同截面形状的电极对微孔的尺寸精度、表面质量、加工效率和亚表面损伤等方面的影响.研究结果表明，微细螺旋电极的加工效率远大于圆柱电极，其中直径200μm的微细螺旋电极的微孔加工效率比相同直径下的圆柱电极提高17%，而直径300μm的微细螺旋电极的加工效率可提高30.56%；微细螺旋电极加工的微孔扩孔量小于圆柱电极的扩孔量，且微细螺旋电极加工得到的孔壁质量优于圆柱电极的；微细螺旋电极所加工的微孔的亚表面损伤层连续且厚度小于圆柱电极所加工的微孔.

关键词: 微细螺旋电极, 微细圆柱电极, 微孔, 铜钨合金, 镍基单晶高温合金

Abstract: The micro-hole processing test of nickel-based single crystal superalloy was carried out to investigate the effects of electrodes with different diameters and different cross-section shapes on the dimensional accuracy， surface quality， processing efficiency and subsurface damage of micro-holes. The results showed that the processing efficiency of micro-holes processed by the micro-spiral electrode is much larger than that machined by the cylindrical electrode. The processing efficiency of micro-holes machined by the micro-spiral electrode with the 200μm diameter is 17% higher than that by the cylinder electrode of the same diameter processed， and the processing efficiency of micro-holes processed by the micro-spiral electrode with the 300μm diameter can be increased by 30.56%. The micro-hole reaming machined by the micro-spiral electrode is smaller than that made by the cylindrical electrode， and the quality of the pore wall obtained by the micro-spiral electrode is better than that machined by the cylindrical electrode. The subsurface damage layer of the micro-hole processed by the micro-spiral electrode is continuous and the thickness is smaller than that of the micro-hole processed by the cylindrical electrode.

Key words: micro-spiral electrode, micro-cylinder electrode, micro-hole, CuW70, nickel-based single crystal superalloy

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