As we all know, polyurethane screens have certain control over the use temperature, so that the products produced can also improve their use quality. If the product is not produced at the same temperature, it will have a certain impact on the toughness of the product. Today, the editor will give you a detailed introduction to the temperature control of this device!
One is that the optimized polyurethane screen cooling method is to take it out of the heating furnace, then put it into the air for proper pre-cooling, then put it into the coolant, and then put it into the coolant for quenching to reduce the effective quenching method. Control the temperature and change the direction of rotation to promote a uniform cooling rate of the workpiece parts, reduce deformation and prevent cracking tendencies.
The second is to determine the heating temperature of the product, that is, quenching treatment. If the heating temperature is too high, the austenite grains will become coarse, oxidation and decarburization will occur, and the tendency of parts to deform and crack will increase. Within the specified temperature range, the lower heating temperature for quenching will cause the shrinkage of the inner hole of the part. Therefore, the upper limit of the heating temperature should be selected for heating. For alloy steel materials, if the heating temperature is too high, the inner pores will expand and the pore diameter will become larger. Therefore, the lower limit of the heating temperature should be used.
Third, after taking the coolant out, do not stay in the air for a long time. It must be placed in a tempering furnace for processing. During the tempering process, low temperature temper brittleness and high temperature temper brittleness should be avoided. For screens with higher precision requirements, multiple tempering treatments can be performed after quenching to eliminate the internal stress of the workpiece and reduce the amount of deformation.
In short, the use temperature of polyurethane screens should be controlled to ensure the integrity of the product. The above is the content of this issue. I hope this article will be helpful to everyone.
