Studies on hard surfacing of structural steel by gas thermal spraying process

Hard surfacing is an economical method for the machine components that require some specific properties like wear resistance, corrosion, erosion and hardness. In this work, hard surfacing of structural steel was carried out by gas thermal spraying process using cobalt alloy powder and oxy acetylene...

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Bibliographic Details
Published inMaterials today : proceedings Vol. 21; pp. 1436 - 1440
Main Author Sethi, A.K.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2020
Subjects
Hard surfacing
Hardness
Microstructure
Structural steel
Thermal spray
Hard surfacing
Structural steel
Hardness
Microstructure
Thermal spray
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Summary:Hard surfacing is an economical method for the machine components that require some specific properties like wear resistance, corrosion, erosion and hardness. In this work, hard surfacing of structural steel was carried out by gas thermal spraying process using cobalt alloy powder and oxy acetylene gas regulated to give a neutral flame. Preheating of base plate was varied 300–350 °C and some samples were given heat treatment after the spraying of temperature 650–850 °C. The geometry of hard surface coating produced under different preheating was studied. The effect of without heat treatment and with heat treatment after spraying at different temperature on the hardness of the cobalt alloy particles and the matrix of the coating obtained under different preheating was thoroughly investigated. The increase of preheat temperature, reduced the coating thickness at its center but spread on the substrate. The increased in post spray heating temperature enhanced the hardness of the coating.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2019.09.173