Effect of thermal conductivity and viscosity of liquid quench medium on its cooling performance during immersion quenching
Quench hardening of engineering components is an important thermal process which alters both metallurgical and mechanical properties of the components. The quench medium used during heat treatment of components is most important to obtain desired properties of components. Understanding of the quenchant characteristics helps heat treaters to judiciously select the quench medium. In this present work an attempt has been made to assess the effect of thermo-physical properties of the quenchants on its cooling performance. Water, brine solutions, polymer solutions and mineral oils were chosen in-order to vary the thermo-physical properties. Cooling curve analyses were carried out by using standard ISO/DIS 9950 quench probe. Grossmann H quench severity of the quench media was determined from the cooling curve analyses. Cooling curve analysis results show that change in thermo-physical properties of the quench media had significant effect on the cooling history of the quench probe. The viscosity of the quenchant used for immersion quenching is the most important factor controls the cooling performance of that quenchant compared to thermal conductivity of the quenchant.
cooling curve analysis thermo-physical property quenchants Grossmann quench severity
G. Ramesh K. Narayan Prabhu
Department of Metallurgical and Materials Engineering,National Institute of Technology Karnataka, Magalore, India-575025
国际会议
北京
英文
453-456
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）