Simulation of Metal Droplet Events during Gas Horizontal Atomization Stage in the Spray Rolling of 7050 Aluminum Alloy

摘要

Spray rolling is a novel metallic semi-solid near-net-shape forming technology. This paper describes the qualitative influence of the key process parameters on the history of velocity, dynamic behavior and enthalpy of the gas and atomized droplets in spray rolling of 7050 alloy based on the fundamentals of spray forming and twin-casting. Results show that the process parameters such as flight time, gas initial velocity, droplet diameter, metal mass flow rate have remarkable influence on process performance including the heat transfer coefficient, droplet velocity, temperature and solid fraction. This work provides a method to better understand the spray rolling technology.