Investigation of wear, hardness, microstructure properties and corrosion resistance of coated st52 steel by WC-Ni particles produced by tungsten -gas arc welding process

Document Type : Research Article

Authors

1 Advanced Material Research Center, Department of material engineering, Islamic Azad University of Najafabad, Najafabad, Iran

2 Department of Material Engineering, Shiraz University of Technology, Advanced Material Research Center, Department of material engineering, Islamic Azad University of Najafabad, Najafabad, Iran

3 Department of Mechanical Engineering, New Technologies Research Center, Advanced Material Research Group, , Amirkabir University of Technology, Tehran, Iran

4 Department of Mechanical Engineering, New Technologies Research Center, Advanced Material Research Group, Amirkabir University of Technology, Tehran, Iran.

/2017.6.21.1

Abstract

In this study, surface alloying of steel ST52 was carried out by gas tungsten arc welding using shielding
gas and tungsten carbide powder. To evaluate the metallurgical structure, wear and corrosion resistance
properties of the coating, optical microscopy, scanning electron microscopy (SEM), hardness and potentiostat
test is used. Corrosion test of prepared samples evaluated by uniform corrosion tests. Microstructural
evaluation of corrosion surfaces was performed by scanning electron microscopy (SEM). The
results of worn surfaces by SEM showed in general, increasing the amount of reinforcing particles of
WC increased matrix resistance against deformation and ultimately improve the wear resistance of the
samples. Also, the most wear resistance of the sample is obtained with 20 percent of the WC. Corrosion
test results showed that the uniform corrosion potential of samples increased by increasing reinforcement
phase compared to steel potential. Also, with increasing percentages of tungsten carbide reinforcing
particles corrosion resistance of samples has increased.

Keywords

References

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