Paper Title:
Effect of Decarburized Layer of Tool Steel on Delamination Strength of WC-Co Thermally Sprayed Coating
  Abstract

Decarburization treatment was carried out on SKD5 tool steel by heating at 1323K for maximum 5.4ks and quenching followed by tempering at 873K for 3.6ks. This resulted in decarburized layer of maximum thickness 0.45mm. After the treatment, WC-Co cermet of 0.2mm thickness was deposited by high-velocity oxygen fuel thermal spraying. Tensile tests were carried out on the specimens, where the load was applied parallel to the specimen. The results show that the presence of decarburized layer increases the interfacial fracture toughness. The reason seems to be that the large plastic deformation of decarburized layer relieves shear and tensile stresses at crack tip. Edge indent tests were also conducted, where shear delamination of coating occurred during the penetration of indenter. The result is that the delamination energy decreases due to the presence of decarburized layer, which is contrary to that of the tensile test. The shear fracture of soft decarburized layer may be the reason for the smaller delamination energy of decarburized specimen.

  Info
Periodical
Key Engineering Materials (Volumes 261-263)
Edited by
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
Pages
447-452
DOI
10.4028/www.scientific.net/KEM.261-263.447
Citation
C. W. Li, M. Kato, K. Nakasa, "Effect of Decarburized Layer of Tool Steel on Delamination Strength of WC-Co Thermally Sprayed Coating", Key Engineering Materials, Vols. 261-263, pp. 447-452, 2004
Online since
April 2004
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Cheng Wei Kang, Han Huang
Chapter 4: Processing of Brittle Materials
Abstract:Precision grinding of a multilayered thin film solar panel is recognized as the bottleneck in its manufacturing process. A primary challenge...
289
Authors: Robert Pala, Jarosław Galkiewicz, Ihor Dzioba
Abstract:In the paper was compared the stress state in front of the crack for SEN(B) specimens of S235RJ steel without and with delamination cracks....
145