Quantifying the Parameters Influencing Heat Transfer during Quenching Of Metal Plate

Abstract

The process of quenching with an array of jets, to improve properties of metal, is a widely used application in metal casting and metal processing industries. This paper reviews the quenching of a metal sheet with series of jets from a mold under static mold and moving mold conditions. Experiments were conducted on various samples under different parameters and the temperature on the back side of the plate was measured using an infrared camera with high local resolution. An analysis method developed by the author was used to obtain heat flux as a function of temperature on the quenching side of the sheet in the steady state region, accounting for the thickness of the sheet. It is observed that the analysis method is also less sensitive to experimental and numerical errors. The thermal history data is used in conjuncture with the analysis method in order to obtain the heat flux and surface temperatures. A study analysing the boiling curve and width of the wetting front is conducted for different parameters like metal, moving speed, jet velocity, water temperature and initial temperature. The results are compared and analysed for identifying various influencing parameters during the quenching process.