Application of Rational Approximate Method in Numerical Simulation of Temperature Field of 9SiCr Alloy Steel with Non-linear Surface Heat-Transfer Coefficients During Gas Quenching

摘要

The gas quenching is a modern, effective processing technology. On the basis of non-linear surface heat-transfer coefficient obtained by Ref. during the gas quenching, the temperature field of 9SiCr alloy steel with non-linear surface heat-transfer during gas quenching was simulated by means of finite element method. In the numerical calculation, the thermal physical properties were treated as the non-linear functions of temperature. The obtained results show that the non-linear effect should be considered in numerical simulation during gas quenching. In order to avoid effectual the "oscillation"in the numerical solutions, the Norsette rational approximate method was used.