Keywords: high temperature, quenching medium, quenching tank, quenching, cooling,

Solution to too high temperature of quenching medium in quenching tank in summer
The high ambient temperature in summer quenching tank with continuous quenching wages the quenching medium temperature is too high and the cooling rate is very slow. The cooling capacity of the quenching medium decreases, resulting in low quenching hardness of the workpiece, uneven quenching fire hardness, unhardened areas appear in the workpiece that could have been quenched, and the risk of quenching cracking increases. Quenching medium heat dissipation is slow, the original cooling method can not meet the requirements of quenching medium cooling. For hot what methods should be used to promote cooling when the quenching medium temperature is too high in summer?

1. Increase the stirring system or enhance the stirring capacity: stirring can make the temperature uniformity of the quenching medium in the quenching tank better, and assist in increasing the heat dissipation function;
2. Dry compressed air: compressed air can promote heat exchange, make the quenching medium roll, and increase the contact area with air to take away part of the heat;
3. circulating cooling system: circulating cooling is the most direct method. through the operation of circulating pump, the quenching medium is passed through the cooler (cooling tower) to realize liquid & mdash;& mdash; Liquid or liquid & mdash;& mdash; Gas heat exchange to achieve the purpose of cooling quenching medium;
4. built-in serpentine cooling: 1 serpentine cooling pipes (spiral pipes, etc.) are installed in the quenching tank, and cooling media such as cooling water and even liquid nitrogen are introduced to reduce the temperature of the quenching medium by forced heat exchange;
5. spray cooling method: the pump presses the quenching medium into the pipeline and the nozzle sprays (sprays) the quenching medium, supplemented by the counter blowing of a fan to force cooling;
6. spare liquid collecting tank: the hot quenching medium is discharged into the liquid collecting tank through a pump, and the cold quenching medium in the liquid collecting tank flows into the quenching tank at the same time. due to the large volume of the liquid collecting tank, the purpose of cooling can be achieved quickly.
there are many cooling methods for quenching medium, and the methods adopted for the actual production situation are also different. here, we will not give an example one by one, but we can also use a variety of methods in combination to achieve the best effect.

PS: In general, the temperature of the quenching medium is 20-60 ℃, usually not more than 80 ℃, otherwise the cooling capacity will drop sharply.

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