Title :
Estimation of optimum quenching process using response surface method
Author :
Zhang, Fang ; Du, Fengshan ; Huang, Huagui
Author_Institution :
Sch. of Mech. Eng., Yanshan Univ., Qinhuangdao
Abstract :
Quenching process is utilized to enhance the hardness and strength of large-scale roller. The main effective parameters on quenching results are the heat transfer coefficient and cooling time. In this paper, the effects of quenching process parameters on the hardened depth and residual stresses were analyzed by using response surface methodology (RSM) based on design of experiments (DOE). A step linearity function model of heat transfer coefficient with time was presented with the objective: depth of hardened layer and residual stresses. The numerical simulation was carried out by means of thermo-elastic-plasticity theory coupling with phase transformation for a sufficient number of process parameters combinations to predict the hardened layer thickness and residual stresses distribution. Finally, mathematical models of response surface were gained by the stepwise regression method.
Keywords :
design of experiments; hardness; internal stresses; quenching (thermal); response surface methodology; cooling time; design of experiments; hardness; heat transfer coefficient; large-scale roller; numerical simulation; quenching process estimation; residual stresses; response surface method; stepwise regression method; strength; Composite materials; Cost function; Heat transfer; Linearity; Optimization methods; Polynomials; Residual stresses; Response surface methodology; Surface treatment; US Department of Energy; heat transfer coefficient; optimum; quenching; response surface method;
Conference_Titel :
Knowledge Acquisition and Modeling Workshop, 2008. KAM Workshop 2008. IEEE International Symposium on
Print_ISBN :
978-1-4244-3530-2
Electronic_ISBN :
978-1-4244-3531-9
DOI :
10.1109/KAMW.2008.4810542
