ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Two kinds of specimen made of a kind of Ta-W alloy material with high melting pointabout 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 theroughness of Ra 0.542μm and Ra 0.174μm, respectively. Moreover, their surface wear-resistancewas studied on a CJS111A friction and wear tester. The micro-appearances on the wear surfaceswere observed and analyzed by using a SEM. The test results indicated that the better wear-resistingability the specimen, the higher wear rate displayed during the test the grinding balls. The wearrates of grinding balls corresponding to the two processed surfaces are 2.4×10-5 mm3/m for theTEDM and 1.4×10-4 mm3/m for the PMEDM, and the latter is 5.8 times of the former. The resultsshow that the PMEDM is better at improving the wear-resistance, roughness and hardness than theTEDM, which means that the technique of PMEDM has a great potential in processing the specialmaterial
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.143.pdf
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