doi:
UDK: 621.791.042.4:621.791.75

THE EFFECT OF CERIUM DIOXIDE ON THE ELECTRICAL CHARACTERISTICS OF THE ARC DURING UNDERWATER WET WELDING

Марков С. П., Карпов В. М.
Article language: English

Annotation

Improving the mechanical properties of the metal seams of welded joints is the most important task in the field of wet underwater welding. One of the ways to increase the ductility of steel is micro-alloying with lanthanides. When welding with piece electrodes, cerium can be introduced by alloying the rod or through a coating in the form of powders of cerium-containing alloys, as well as its chemical compounds. It was found that cerium particles degrade the welding and technological properties of the electrodes, affecting the electrical characteristics of the arc. When cerium dioxide is applied to the coating, the excitation and extinction voltages of the arc increase, its elasticity decreases, and the electric field strength in the near-electrode regions changes. In this regard, there is a problem of alloying the seam metal with cerium during underwater wet welding, as well as the problem of wet underwater welding of structural steels modified with cerium. Keywords: wet welding, welding electrode, lanthanide modification, arc column electric field, cerium oxide.

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