Abstract
A new technology of low-frequency modulation of the arc current in MAG and MIG welding is presented. The technology provides control of thermal and crystallization processes, stabilizes the time of formation and crystallization of the weld pool. Conducting theoretical studies allowed formulating the basic criteria for obtaining strong permanent joints for high-duty structures, providing conditions for more equilibrium structure of the deposited metal and the smaller width of the HAZ. The stabilization of time of the formation and crystallization of the weld pool improves the formation of the weld and increases productivity in welding thin sheet metal.
Highlights
IntroductionToday conventional methods of welding and hardfacing (arc hardfacing, electroslag hardfacing, plasma-jet hardfacing) have exhausted their potential
Today conventional methods of welding and hardfacing have exhausted their potential
- lower deformation in welded products, built-up layers; - improvement in the quality of welded joints and the coatings applied. These advantages are obtained by means of directed crystallization of the welding pool and intensified
Summary
Today conventional methods of welding and hardfacing (arc hardfacing, electroslag hardfacing, plasma-jet hardfacing) have exhausted their potential. Production of new promising steel types in industry is being constantly improved and developed It requires research and development in new technologies increasing performance capabilities of conventional heating sources (arc, plasma, laser radiation) and their hybrid combinations used to produce permanent joints of these steels [1,2,3,4]. - lower deformation in welded products, built-up layers; - improvement in the quality of welded joints and the coatings applied (improved weld regardless from space position, homogenous chemical composition throughout the coating, structure atomization in the weld and in the heat-affected zone) These advantages are obtained by means of directed crystallization of the welding pool and intensified.
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