Abstract
In this article, the finite-element method is used to establish a mathematical model of heat transfer in arc welding. The 800–500°C cooling time (the t8/5 time) of the metal adjacent to the weld junction can be precisely calculated by the model. The quantitative relationships between the welding process parameters, the value of t8/5, the microstructures and the properties of a welded joint are set up, based on experiential formulae and data. A microcomputer-aided system for selecting the arc-welding process parameters has been developed, based on these relationships. The system is designed to run on an IBM-PC or compatible computer.
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