The water-based PAG quenching liquid controls its cooling capacity by controlling its concentration, temperature and stirring, and obtains a cooling range between water and oil. How to control the influence of concentration, temperature and flow rate on quenching liquid cooling rate.
1. The effect of concentration on cooling rate
Concentration is inversely proportional to the cooling rate, increasing the concentration and decreasing the cooling rate, conversely decreasing the concentration and increasing the cooling rate. Therefore, if you want to increase the cooling rate, add tap water to decrease the concentration, otherwise, add quenching solution to increase the concentration and decrease the cooling rate.
2. The influence of temperature on cooling rate
Simply put, the higher the temperature, the lower the cooling rate; the lower the temperature, the higher the cooling rate. Therefore, to increase the cooling rate, the quenching agent can be cooled during production to reduce the temperature; otherwise, heating or stopping the cooling cycle and increasing the quenching agent temperature can reduce the quenching cooling rate.
3. The effect of stirring on the cooling rate
Stirring the quenching liquid (package swinging workpiece) can increase its quenching cooling rate; on the contrary, reduce the quenching cooling rate.
Making good use of the influence of these three aspects on the cooling rate can solve many heat treatment problems.