纳米氧化铝涂层电火花加工工具的实验研究

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-04-03 DOI:10.1080/02670844.2023.2235747

Shu-Yu Gui, Huajun Gong, Yijia Sun, Chong Feng

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引用次数: 0

摘要

摘要在电火花加工（EDM）加工高宽比小孔的过程中，刀面与工件之间的异常放电会导致加工过程的高度不稳定性和形状精度的下降。为了解决这个问题，基于原子层沉积（ALD）在工具侧面镀上致密的纳米氧化铝绝缘膜，以抑制二次放电，从而有利于工具的完整性和形状精度。对GH4099镍基高温合金工件进行了钻孔实验，测试了涂层黄铜刀具的加工效果。实验结果表明，它可以提高加工稳定性，改善加工孔的表面形貌。刀具磨损减少约21.7%，沿刀具侧面的放电坑和炭黑膜显著减少。

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Experimental investigation of the EDM tools coated with nano-alumina film

ABSTRACT During electrical discharge machining (EDM) drilling of small high-aspect-ratio holes, abnormal discharges between tool flank and workpiece will result in high process instability and poor shape accuracy. In order to solve this problem, dense nano-alumina insulating film is plated on the tool flank based on atomic layer deposition (ALD) to suppress the secondary discharge for the benefit of the tool’s integrity and shape accuracy. Drilling experiments on nickel base superalloy GH4099 workpiece were conducted to test machining effect of the coated brass tool. Experimental results show that it can enhance the process stability and improve the surface topography of the machined holes. The tool wear is reduced by about 21.7%, and the discharge craters and carbon black film along the tool flank are significantly reduced.

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.