International Journal of Electrical Machining
Online ISSN : 2188-5117
Print ISSN : 1341-7908
Paper
Improvement of Surface Characteristics for Long Life of Metal Mold by EDM in Chromium Powder Mixed Working Fluid
Ruixiang WANGRyoji KITADARyota TOSHIMITSUAkira OKADA
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2017 Volume 22 Pages 26-

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Abstract

 This paper aims to form a chromium carbide containing layer on metal mold steel by EDM finishing in chromium powder mixed working fluid in order to improve the surface characteristics for long life of metal mold, such as surface hardness, corrosion resistance and releasability of molded resin. The surface characteristics of carbon tool steel with low chromium content finished by EDM in chromium powder mixed working fluid were compared to those of alloy tool steel SKD11 with high chromium content. Experimental results shows that surface hardness, corrosion resistance and releasability of molded resin could be significantly improved to the same high level for both kinds of steel by EDM finishing in chromium powder mixed fluid.

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© 2017 by the Japan Society of Electrical Machining Engineers
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