Numerical and Infrared Mapping of Temperature in Heat Affected Zone during Plasma Arc Cutting of Mild Steel

During welding or flame cutting of metals, the prediction of heat affected zone (HAZ) is critical. There is need to develop a simple mathematical model to calculate the temperature variation in HAZ and derivative analysis can be used for this purpose. This study presents analytical solution for heat transfer through conduction in mild steel plate. The homogeneous and nonhomogeneous boundary conditions are single variables. The full field analytical solutions of temperature measurement, subjected to local heating source, are derived first by method of separation of variables followed with the experimental visualization using infrared imaging. Based on the present work, it is suggested that appropriate heat input characteristics controls the temperature distribution in and around HAZ.

Authors:

• Dalvir Singh
• Somnath Chattopadhyaya

Keywords:

• Conduction Heat Transfer
• Heat Affected Zone (HAZ)
• Infra-Red Imaging
• Numerical Method
• Orthogonal Function
• Plasma Arc Cutting
• Separation of Variables
• Temperature Measurement.

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