REVIEW ON HARDFACING AS METHOD OF IMPROVING THE SERVICE LIFE OF CRITICAL COMPONENTS SUBJECTED TO WEAR IN SERVICE

C Okechukwu; OA Dahunsi; PK Oke; IO Oladele; M Dauda

doi:10.4314/njt.364.1478

REVIEW ON HARDFACING AS METHOD OF IMPROVING THE SERVICE LIFE OF CRITICAL COMPONENTS SUBJECTED TO WEAR IN SERVICE

Authors

C Okechukwu DEPT. OF MECHANICAL ENGINEERING, FEDERAL UNIVERSITY OF TECHNOLOGY, AKURE, ONDO STATE, NIGERIA.
OA Dahunsi DEPT. OF MECHANICAL ENGINEERING, FEDERAL UNIVERSITY OF TECHNOLOGY, AKURE, ONDO STATE, NIGERIA.
PK Oke DEPT. OF MECHANICAL ENGINEERING, FEDERAL UNIVERSITY OF TECHNOLOGY, AKURE, ONDO STATE, NIGERIA.
IO Oladele DEPT. OF METALLURGICAL AND MATERIALS ENGR., FED. UNIVERSITY OF TECH. AKURE, ONDO STATE, NIGERIA.
M Dauda ADVANCED MANUFACTURING TECHNOLOGY PROGRAMME, JALINGO, TARABA STATE, NIGERIA.

DOI:

https://doi.org/10.4314/njt.364.1478

Keywords:

Hardfacing, wear, substrate, consumable, service life extension, composition compensation

Abstract

A review on hardfacing is presented. Hardfacing involves applying a consumable with desired wear properties over a soft base metal surface to enhance resistance to different wear mechanisms. Substrate materials used for hardfacing are mainly steel, while the alloys of carbide forming elements dominate the surfacing consumables. Powder metallurgy, atomisation and granulation are methods of producing hardfacing alloy powder. Most welding methods were identified to be successfully used in applying consumable on substrate surfaces. Dilution decreases with increase in the number of hardfacing layers. Buffers, butters and build-up metals are used to compensate for composition differences to prevent spalling, overcome welding difficulties and make up for badly worn surfaces, respectively. Waffle, stringer and dot patterns are the existing hardfacing deposit patterns. Benefits of hardfacing include: reduced downtime, inventory and maintenance cost, increased plant availability and productivity, and a good number of service life extensions through timely reparation.

http://dx.doi.org/10.4314/njt.v36i4.15

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Published

2017-09-29

Issue

Vol. 36 No. 4 (2017)

Section

Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering

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How to Cite

REVIEW ON HARDFACING AS METHOD OF IMPROVING THE SERVICE LIFE OF CRITICAL COMPONENTS SUBJECTED TO WEAR IN SERVICE. (2017). Nigerian Journal of Technology, 36(4), 1095-1103. https://doi.org/10.4314/njt.364.1478