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A Review Paper on Research Work Done In Hardfacing of Stellite-6 Alloy


Gowrishankari .L , Government College of Engineering- Salem; Dr. B. Shanmugarajan, WRI-BHEL -TRICHY; Dr. B. Anandavel, GCE -SALEM; Sundararaj .P, GCE-SALEM


Hard Facing, Coating, Stellite 6, Heat Treatment, XRD Phase and Stress, Microstructure, Wear


Stellite 6 is a most widely used Cobalt based super alloy in industries, due to its outstanding behavior against high temperature oxidation and excellent wear resistance. Stellite 6 is a very versatile material that is used for hardfacing of various component parts for applications requiring wear resistance. It is a mixture of cobalt and other elements like nickel, chromium, tungsten, carbon and molybdenum. Chromium is added to form carbides and to provide strength to the cobalt matrix as well as to enhance the resistance against corrosion and oxidation. Tungsten and molybdenum have large atomic sizes and give additional strength to the matrix. They also form hard brittle carbides. Nickel is added to increase the ductility. The microstructure of Stellite 6 contains hard M7C3 carbides in interdendritic regions in both as-cast and as welded conditions. Stellite 6 cobalt base alloys consist of complex carbides in an alloy matrix. Their exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix. Stellite 6 is the most widely used of the wear resistant cobalt based alloys and exhibits good all-round performance.

Other Details

Paper ID: IJSRDV7I11000
Published in: Volume : 7, Issue : 1
Publication Date: 01/04/2019
Page(s): 1652-1654

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