A Study on the Mechanical Properties of SM490A by FCAW Welding Attitude 


Vol. 34,  No. 6, pp. 7-12, Dec.  2019
10.14346/JKOSOS.2019.34.6.7


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  Abstract

Flux Cored Arc Welding (FCAW), which has been widely used in many industries, was developed in the 1950s to supplement shortcomings of the Shielded Metal Arc Welding (SMAW). FCAW has an advantage in that it can weld regardless of postures and give good quality results in the filed with many different working conditions. In this study, SM490A (rolled steel for welding structural purpose) with different thicknesses (L:25T+R:30T) were welded using FCAW. Then the mechanical properties (tension test, bending test, hardness test, impact test and macro test) were analyzed and the following conclusions were drawn. In the tensile test, it exceeds the KS standard tensile strength range (400~510) in all welding positions, which means there is a problem in the tensile force transmission performance. In the bending test, it was found that most of the specimens did not exhibit surface rupture or other defects during bending test and they exhibit sufficient toughness even after plastic deformation. In the hardness test, all the results were lower than the standard value of 350 Hv of KS B 0893, which means they have good hardness. In the impact test, all results were larger than the KS reference value of 27J. In the macro test, they showed uniform structure state by the shape of the weld, and there was risk of lamination because no internal defects, bubbles, or impurities were found on the surface of the weld.

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  Cite this article

[IEEE Style]

임광묵 and 이성일, "A Study on the Mechanical Properties of SM490A by FCAW Welding Attitude," Journal of the Korean Society of Safety, vol. 34, no. 6, pp. 7-12, 2019. DOI: 10.14346/JKOSOS.2019.34.6.7.

[ACM Style]

임광묵 and 이성일. 2019. A Study on the Mechanical Properties of SM490A by FCAW Welding Attitude. Journal of the Korean Society of Safety, 34, 6, (2019), 7-12. DOI: 10.14346/JKOSOS.2019.34.6.7.

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