Tungsten carbide powder inserts in ductile iron

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Liliana Duarte (Author) FEUP; Nuno Lourenço (Author) FEUP; Henrique Santos (Author) FEUP; Joaquim Santos (Author) Other; Carlos Sá (Author) FEUP

Journal

Title: Materials Science Forum

Vol. 455-456

Pages: 267-270

ISSN: 0255-5476

Publisher: Trans Tech Publications Ltd

Other information

DOI: 10.4028/www.scientific.net/MSF.455-456.267

Abstract (EN): In this work the surface of ductile iron is hardened by a tungsten carbide (WC) layer. The inserted layer is obtained by pouring liquid cast iron on a mixture formed by WC particles (with an average diameter of 6 micrometers) and sodium silicate (acting as a binder). Results show that a sound inserted layer with 2.5mm thickness was produced; the layer is compact, the interstices between particles (with dimensions close to some tenth micrometer) are filled with base metal and the continuity between the WC particles and the base metal is ensured by growth of tungsten rich carbides from the WC particles into the metallic matrix. The surface hardness of the inserted layer achieves Fig.s higher than 500VHN/4.9N.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4