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Optimal use temperature of polyurethane screen

Writer: admin Time:2020-10-20 11:18 Browse:

  What is the best operating temperature of the polyurethane screen? I believe many of my friends are not clear. Today, the polyurethane screen manufacturer will give you a brief introduction.
  Polyurethane insulation material, general temperature material, temperature resistance of 120 degrees, high temperature material of 142 degrees, high temperature of 150 degrees (continuous work cannot exceed 500 hours per year). There is no polyurethane material that can reach 250 degrees.
  The practical application is already very extensive. Metallurgy (iron ore, limestone, fluorite, cooling blast furnace slag, coke and other raw materials), coke, coal, coal washing, chemical industry, building materials and hydropower engineering, abrasive waste treatment, quarry and other industries materials washing and screening , Classification and other industries. The new structure pattern sieve plate with various format specifications and sieve hole sizes is especially commonly used in occasions with strong impact, high hardness and high wear resistance. Wear-resistant screen plates are used for fine crushing and screening of iron ore, raw coal classification, gold, building materials, and sand and gravel screening for hydropower and nuclear power projects.
  1. To optimize its cooling method
  The polyurethane dewatering screen is taken out of the heating furnace. Before putting the coolant, it needs to be placed in the air for proper pre-cooling, and then put in the coolant for quenching. This is to reduce the quenching deformation and cracking tendency of the parts Effective method. After the mold is put in the coolant, it needs to be rotated appropriately, the temperature is controlled and the direction of rotation must be changed, so that the workpiece has a uniform cooling rate, reduces deformation and prevents cracking.
Optimal use temperature of polyurethane screen.
  2. To determine the heating temperature
  For the quenching treatment of the polyurethane dehydration screen, if the heating temperature is too high, the austenite grains will be coarse, and the phenomenon of oxidation and decarburization will be formed, and the deformation and cracking tendency of the parts will increase. In the specified temperature range, the heating temperature of quenching is too low, which 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, it will cause the expansion of the inner hole and the size of the hole diameter will become larger. Therefore, the lower limit of the heating temperature should be selected.
  3. Perform tempering control
  After removing the polyurethane dewatering screen from the coolant, do not stay in the air for a long time, and must be put into the tempering furnace for treatment in time. During the tempering process, low temperature temper brittleness and high temperature temper brittleness should be avoided. For those sieve plates that require relatively high precision, after quenching, they can be tempered multiple times to eliminate the internal stress of the workpiece and reduce its deformation. Polyurethane screen
  4. Carry out quenching operation
  For some sieve products that require wire-cutting processing, prior to the wire-cutting processing, stepped quenching and multiple tempering heat treatments should be used to improve the hardenability of the workpiece, so that the internal stress of the sieve can be evenly distributed and good performance .
  Chaishang Trading Co., Ltd. mainly produces various elastomer products using castable polyurethane as raw materials, such as polyurethane cleaners, polyurethane screens, polyurethane screens, stator rotors, lining pipes, cyclones and various non-standard customized products, etc. . The products are exported to more than 40 countries and regions in Europe, North America, South America, Australia, Asia, etc., and have been recognized and praised by the majority of users over the years.

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Company: Dezhou Chaishang Shangmao Co.,Ltd.

Contact: Jack Ma

Fax: 86-534-2798881

Phone: 86-15621266667

Email: Jackma@dzchaishang.com

Add: Room1016, Donghui Building ,Dezhou City , Shandong Province , China.

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