Paper Title:
Surface Properties of 3000°C High Melting Point Material by Powder Mixed EDM
  Abstract

Two kinds of specimen made of a kind of Ta-W alloy material with high melting point about 3000°C were processed by a traditional EDM (TEDM) and a powder mixed EDM (PMEDM) separately, and its surface characteristics were tested. After processing, their surfaces had the roughness of Ra 0.542μm and Ra 0.174μm, respectively. Moreover, their surface wear-resistance was studied on a CJS111A friction and wear tester. The micro-appearances on the wear surfaces were observed and analyzed by using a SEM. The test results indicated that the better wear-resisting ability the specimen, the higher wear rate displayed during the test the grinding balls. The wear rates of grinding balls corresponding to the two processed surfaces are 2.4×10-5 mm3/m for the TEDM and 1.4×10-4 mm3/m for the PMEDM, and the latter is 5.8 times of the former. The results show that the PMEDM is better at improving the wear-resistance, roughness and hardness than the TEDM, which means that the technique of PMEDM has a great potential in processing the special material.

  Info
Periodical
Key Engineering Materials (Volumes 375-376)
Edited by
Yingxue Yao, Xipeng Xu and Dunwen Zuo
Pages
143-147
DOI
10.4028/www.scientific.net/KEM.375-376.143
Citation
F. Q. Hu, H. Zhang, W. S. Zhao, Z. L. Wang, D. Hu, Y. Yu, "Surface Properties of 3000°C High Melting Point Material by Powder Mixed EDM ", Key Engineering Materials, Vols. 375-376, pp. 143-147, 2008
Online since
March 2008
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$32.00
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