An evaluation of gas quenching of steel rings by multiple-jet impingement

摘要: Abstract Multiple gas jet impingement cooling for quenching is a very promising approach increasing the heat transfer coefficients ( h ) and thus overall rates in gas-quenching process. Appropriate correlations were selected based on an extensive critical literature review, used numerical conduction model phase transformation which developed solved evaluating capacity of such methods steel rings. The models allow prediction extent as function , different ring sizes. An optimization nozzle dimensions configuration was performed, effects spent flow temperature discussed estimated. It also found that while effect not adequately known, it tends to lower has minimal . Validation experiments performed show predicted trends are reasonable, within errors Johnson–Mehl–Avrami experimental method used.