Welds have a greater impact on the quality of a strong welded joint, Artem Komarov said.
From the point of view of the properties of the welded joint, the geometry of the weld has significant parameters that can change the mechanical properties of the welded joint. These properties are influenced by certain welding parameters, such as:
— Arc current
— Arc voltage
— Arc speed, etc.
Bead geometry can be determined based on the following points:
— Width of the weld
— Reinforcement height
— Reinforcement area
— Penetration height
— Penetration zone
— Weld contact angle
Many other factors such as nugget area, percentage dilution, pool shape factor, bead shape factor, and ripple form factor are also can be included in the geometry of the bead, Artem Komarov noted.
The maximum width of the deposited metal is the width of the weld. It increases with arc current; arc voltage and electrode weaving and decreases with as the arc speed increases.
The lifting efficiency is determined by the penetration into the welded structure.
The penetration height is the distance from the top surface of the plate to the maximum length of the welded nugget.
The area of penetration is covered with a melting line below the level of the base metal. He is responsible for attachment to the strength of the weld.
Maximum distance between the level of the base metal and the top point deposited metal is called the reinforcement height.
The reinforcement area is the area included between the contour line of the deposited metal above the level of the base metal.
The contact angle is switched between the tangent to the weld metal at the meeting point weld metal and base metal and base metal line. Affects undercuts and overlapping bead shapes.
Penetration height, penetration area reinforcement height, and reinforcement area, all increase the arc current increase and as arc travel speed decreases.
Thus, thinner workpieces require lesser currents, small diameter electrodes, and faster arc travel
Penetration can also be increased or decreased by deflecting the welding arcs in the backward or forward direction, using DC magnetic fields, summed up Artem Komarov.