Heat Input Coefficient
The heat input efficiency indicates how much of the electrical energy of the arc actually transfers into the workpiece. A high value means more effective heat transfer and lower losses.
Physical and chemical mechanism of action
The heat input coefficient (HIC) indicates how efficiently heat is transferred from the arc to the workpiece. It's the ratio of the actual heat that goes into the workpiece to the total electrical energy of the arc.
Metallurgical relevance and welding risks
A low HIC means a lot of heat is lost and doesn't reach the workpiece. This can lead to poor heating of the weld, causing incomplete fusion or porosity. A high HIC, on the other hand, ensures more effective heat transfer and improves weld quality.
Shop practice and action instructions
To get an optimal HIC, pay attention to the following:
• Use high-quality shielding or reflectors to direct the arc directly onto the workpiece.
• Make sure the arc isn't reflected off other metals or materials that could cause heat loss.
• Use a suitable shielding layer or insulation around the arc to minimize reflections and boost energy efficiency.