A mixed reality system has been created for simulating gas metal arc welding (GMAW) welding. This simulation system is intended for use in training human welders. The system is comprised of a real welding torch attached to a force feedback device, a head-mounted display, a 6 DOF tracking system for both the torch and the user's head, and external audio speakers. The welding simulation is based on empirical results from detailed analysis of a series of test welds. The simulation runs in real-time, using a neural network to determine the quality and shape of the created weld based on the orientation and speed of the welding torch. The welding process and resulting weld bead are displayed in a virtual environment. Weld quality and recorded process values can be displayed after welding for review.