EPrints@IIT Delhi >
Faculty Research Publicatons  >
Industrail Tribology Machine Dynamics [ITMMEC] >

Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/756

Title: High temperature friction and wear characteristics of various coating materials for steam valve spindle application
Authors: Mann, B S
Prakash, Braham
Keywords: Alumina
Chromium carbide
Plasma spray
High temperature wear resistance coatings
Steam valve spindles
Nickel chrome
Issue Date: 2000
Citation: Wear, 240(1-2), 223–230
Abstract: Various coatings such as chromium carbide deposited by plasma spraying and detonation gun techniques , chromium oxide, chromium oxideqtitaniaqsilica, NiCrAlY, and Al O qNiAl, all deposited by plasma spraying; stelliting, and surface nitriding have 2 3 been applied on X20CrMo V121 steel. This steel is used for high temperature applications such as steam turbine valve spindle. Friction and wear behavior of the surface coated and treated materials have been studied at an elevated temperature of 5508C while rubbing against graphite-filled stellited steel. These studies have been carried out on SRV Optimol reciprocating tribometer. Test parameters for tribological studies have been selected with a view to simulate operating conditions encountered in operation. Additionally, the structure, porosity, hardness, bond strength, and thermal cycling behaviour of these surface coatedrtreated materials have been characterised. Based on these laboratory investigations, chromium carbide coating deposited by plasma spraying technique has been identified as the most suitable coating for steam turbine valve spindle application. Process parameters have been established for deposition of chromium carbide coating by plasma spraying technique on actual valve spindles. The field results obtained are found to be commensurate with the laboratory findings.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/756
Appears in Collections:Industrail Tribology Machine Dynamics [ITMMEC]

Files in This Item:

File Description SizeFormat
mannhig2000.pdf564.08 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback