Improved Hardness and Wear Resistance of Steel ASTM A-106 Using GTAW Welding of SiC Particles

Document Type : Research Paper

Authors

1 nadarmDepartment of Material, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 Department of Mechanical Engineering, Payame Noor University, Isfahan, Iran

Abstract

In this study, formation of composite coating containing silicon carbide amplifiers on ASTM A106-Gr B steel surface was investigated using the gas tungsten arc welding process. Therefore silicon carbide particles with different volume percentages on the steel surface were placed, and by changing the current density, melting and mixing process were done with the base metal. The study coating microstructure by optical microscopy and scanning electron microscopy (SEM) was conducted alongside the spot analysis. The results showed that the dendritic structure of the resulting coating which contained silicon carbide is capable of reinforcing. Besides, the capability of reinforcing could be improved hardness and wear behavior of the coatings. Hard coatings by a micro-hardness measurement and with slab vickers and wear behavior of the coatings was evaluated by testing the wear-trip basis. Microhardness test results showed that increased hardness was created (about 650 to 1200 Vickers)  to compare  with uncoated samples (about 200 Vickers) is. Conducting reviews of wear behavior of coatings represents significant improvements in their wear behavior due to the effect of adding silicon carbide reinforcement. The main wear mechanism of uncoated delamination wear samples, surface oxidation and the samples which were coated with a mixture of delamination wear, surface oxidation and adhesive wear were detected.
 

Keywords

References

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Journal of Petroleum Research
Volume 26, 95-4 - Serial Number 89
January and February 2017
Pages 116-127

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