Systems and methods for predicting heat transfer coefficients during quenching

摘要

A method of predicting heat transfer coefficients for metal castings during quenching and / or cooling is provided. First, an initial set of HTC data is computed from Computational Fluid Dynamics (CFD) simulation based on the metal casting geometry, initial metal casting temperature (distribution), quench bed / tunnel dimensions and construction, and a given or measurement base (standard ) Quenching condition, which includes, but is not limited to, an air and / or gas flow rate, an air and / or gas flow direction relative to the workpiece, an air and / or gas temperature, an air and / or gas humidity, etc. procured. The HTC values initially calculated from the CFD for the entire surface of the workpiece can then be optimized by multiplication scaling factors in order to minimize the error between the predicted temperature-time profiles and the experimental measurements for the given or the standard / measurement base quenching condition. When the HTC values are optimized for a standard / measurement base quench condition, a set of semi-empirical equations (or weighting functions) can be used to quickly get the standard / measurement base HTC data for different deterrence conditions (i.e., deviations of the deterrence conditions from the measurement base) Modify without performing full heat transfer and optimization calculations. A manufacturing system and object are also provided.