Effect of initial oil temperature on impact toughness of steel
Effect of initial oil temperature on impact toughness of steel
(OP)
Can any one can give me some informations about the effect of the oil initial temperature on impact toughness of steel :
IE: what happen if we quench at various temperatures: 20°C, 30 °C 40°C what is the effect on the impact toughness ?
thanks
IE: what happen if we quench at various temperatures: 20°C, 30 °C 40°C what is the effect on the impact toughness ?
thanks





RE: Effect of initial oil temperature on impact toughness of steel
With that said, most petroleum oils will be most effective around 50 to 60 C (120-140 F). At lower temperatures, the viscosity goes up, reducing the flow characteristics and the severity of the quench. At higher temperatures, you run into problems with the oil breaking down and even problems with fire if the oil should exceed the burn point of the oil. Again, the supplier of the quench oil will know what the optimum temperatures are, although the volume of your quench tank, size of the quenching load, and effectiveness of the heat exchanger will all be important variables.
With water or water-based synthetic quench solutions, the optimum temperature is much lower. Again, there are really too many factors to just say any specific temperature.
Finally, you may find differences in the chemistry of different lots of steel to have a greater effect than the quenchant temperature. There are many different variables, and quench oil temperature is only one
rp
RE: Effect of initial oil temperature on impact toughness of steel
Thanks a lot Redpicker !
RE: Effect of initial oil temperature on impact toughness of steel