聚晶金刚石的Nd:YAG激光切割与电火花线切割损伤分析

摘要/Abstract

摘要：

采用近红外Nd:YAG激光切割方法与电火花线切割方法进行了聚晶金刚石（polycrystalline diamond compacts,PDC）切割加工实验,并分别利用细砂纸打磨、金刚石微粉抛光以及王水腐蚀等表面处理方法对试件进行了表面处理,通过扫描电镜显微观察与拉曼光谱分析等方法对试件进行了显微观察与分析。经分析发现:尽管近红外Nd:YAG激光切割速度较快,然而因脉宽较大导致热损伤大,加工表面存在明显的残留层,而且金刚石与硬质合金层界面存在明显的裂纹;电火花线切割表面质量好于激光切割加工,但金刚石界面处存在材料过量去除现象,而且切割速度比近红外激光切割加工小得多。为获得较好的PDC切割质量与切割效率,需采用脉宽更短的Nd:YAG激光或紫外激光。

关键词:

PDC, 激光切割, 电火花线切割, 石墨化

Abstract:

Cutting experiments of PDC with a YAG (Nd:YAG, nneodymium-doped yttrium aluminium garnet) laser and WEDM were carried out herein. After laser cutting and WEDM, the specimens were polished with fine abrasive papers, diamond powders and etched in aqua regia respectively. To facilitate the investigation, the laser-cut and/or WEDM specimens were observed and analyzed with scanning electron microscopy and Raman spectroscopy.It is found that the cutting speed of Nd:YAG laser is great larger than that of WEDM, and Nd:YAG laser results in striation formation on the cut surface and cracking along the boundary of the diamond and the hard metal layer, while WEDM leads to over-removal of materials at the boundary area. To improve cutting quality of PDC, it is very important to avoid the continuous crack of laser-cutting specimen and overcome the over-ablation of WEDM specimen coming up at the interface between diamond layer and hard metal layer.

Key words:

polycrystalline diamond compact(PDC), laser-cutting, wire electric discharge machining(WEDM), graphitization

中图分类号:

TG455
TQ164

吴煜, 张高峰.

聚晶金刚石的Nd:YAG激光切割与电火花线切割损伤分析

[J]. 中国机械工程, 2010, 21(9): 1034-1039.

TUN Yu, ZHANG Gao-Feng.

Damage Analysis of PDC Cutted by Nd:YAG Laser and WEDM

[J]. China Mechanical Engineering, 2010, 21(9): 1034-1039.

参考文献

[1]曹凤国[1],桂小波[1].大面积PCD复合片电火花加工高效节能脉冲电源的研究[J].金刚石与磨料磨具工程,2004(2):17-19.
[2]Spur G, Appel S. Wire EDM Cutting of PCD[J]. Industrial Diamond Review, 1997, 4 (1) : 124-130.
[3]Cappelli E, Mattei G, Orlando S. Pulsed Laser Surface Modifications of Diamond Thin Films[J].Diamond and Related Materials, 1999,8(2/5) ..257-261.
[4]Lin J F, Lin J W, Wei P J. Thermal Analysis for Graphitization and Ablation Depths of Diamond Films[J]. Diamond and Related Materials, 2006,15(1), 1-9.
[5]Gloor S, Luthy W, Weber H P. Subrnicron Laser Writing on Diamond[J].Diamond and Related Materials, 1999,8(10): 1853-1856.
[6]Wee L M, Li L An Analytical Model for Striation Formation in Laser Cutting[J]. Applied Surface Science, 2005,247 (1/4) : 277-284.
[7]Lv S J, Wang Y. An Investigation of Pulsed Laser Cutting of Titanium Alloy Sheet[J]. Optics and Lasers in Engineering, 2006,44(10): 1067-1077.
[8]Rao B T, Kaul T, Tiwari P. Inert Gas Cutting of Titanium Sheet with Pulsed Mode CO2 Laser[J]. Optics and Lasers in Engineering, 2005,43(12): 1330-1348.
[9]Karatas C, Keles O, Uslan I. Laser Cutting of Steel Sheets: Influence of Workpiece Thickness and Beam Waist Position on Kerr Size and Stria Formation[J].Journat of Materials Processing Technology, 2006,172 (1) :22-29.
[10]Howe J Y. The Oxidation of Diamond[D]. New York.. University of Alfred, 2001.
[11]Kononenko T V, Ralchenko V G, Vlasov I I. Ablation of CVD Diamond with Nanosecond Laser Pulses of UV--IR Range[J]. Diamond and Related Materials, 1998,7(11/12): 1623-1627.
[12]李力钧编著.现代激光加工及其装备[M].北京:北京理工大学出版社,1993:246.
[13]谢小柱.声光调q yag脉冲激光修锐超硬磨料砂轮的试验研究 [D].湖南大学,2002:
[14]陈根余[1],李力钧[1],马宏路[1],刘礼[1],柳士江[1],谢小柱[1].声光调QYAG脉冲激光修锐和整形青铜金刚石砂轮[J].机械工程学报,2005,41(4):174-179.

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