Effect of Nanoscale Tungsten Carbide Powders on the Structure and Properties of Weld Metal

Submerged arc welding is one of the most productive joining processes of metal constructions, especially of great thickness. However, when welding with a minimum of layers the weld pool gets a sufficiently large size that, in turn, reduces the toughness of the weld. To achieve changes in this case is possible by adding modifiers in the weld metal. In the article there was examined the effect of nanoscale tungsten carbide powders on the structure and properties of the weld metal, performed by submerged arc welding. The experimental results showed that the introduction of nanoparticles to the molten weld pool allows increasing the toughness for 21% at a test temperature of 20 ° C. It was defined that nanoscale modifiers have a beneficial effect on toughness and structure of weld metal, performed by submerged arc welding.

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