Effects of Shielded Metal Arc Welding Process Parameters on Dilution in Hardfacing of Mild Steel Using Factorial Design

In the present paper, the structure of electric arc coatings modified with nanodispersed titanium carbonitride additives on low-carbon pipe steel is studied using optical, scanning tunneling, and transmission electron microscopy. The obtained “substrate-modified surface” compositions are tested for fracture toughness, and the derived test results are compared with the data for the compositions formed using commercial electrodes. It is found that the introduction of titanium carbonitride nanoparticles with the estimated content from 0.15 to 1 wt% refines the ferrite–pearlite structure. Scanning tunneling microscopy reveals acicular and lamellar structures in local regions of ferrite grains, which, by morphological features, are identified as lower bainite and acicular ferrite. It is concluded that the increase in fracture toughness of the “substrate-modified surface” composition is of a complex nature. First of all, this increase is associated with grain refinement, while the formation of intermediate transformation structures plays a secondary role.

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Effects of Shielded Metal Arc Welding Process Parameters on Dilution in Hardfacing of Mild Steel Using Factorial Design

Cited by 3 publications

References 13 publications

Microstructure and corrosion properties of single layer Inconel 625 weld cladding obtained by the electroslag welding process

Microstructure and corrosion properties of single layer Inconel 625 weld cladding obtained by the electroslag welding process

Analysis of wear and hardness during surface hardfacing of alloy steel by thermal spraying, electric arc and TIG welding

Scanning Tunneling Microscopy of Intermediate Transformation Structures in Electric Arc Surfacing Modified with Titanium Carbonitrides on Pipe Steel

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