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If the carbon content of the steel is 0.35% or more, quench hardening is possible. The quenching and tempering is a heat treatment that combines the quenching and high temperature tempering to adjust the hardness / strength of the steel (steel parts). Because the quenched and tempered materials and products are machined, the hardness is not as high as that after quenching. A method for hardening the surface of carbon steels with a carbon content of 0.35% or more, such as S45C or SCM440. It should be noted that after the gear is subjected to high-frequency treatment, the hardness of the tooth surface and the tooth top may meet the requirements for use, but the tooth root may not reach the quenching hardness, which is lower than the hardness of the carburizing and quenching treatment.
After high frequency quenching, the accuracy of gears decreases. When used as a high-precision gear, the gear needs to be ground. When disassembling the coupling, the coupling bolts are generally removed first. Because a layer of grease, corrosion products and other deposits are deposited on the surface of the thread, it is not easy to disassemble the bolt, especially for bolts with severe corrosion, disassembly is very difficult. A suitable tool must be selected for the removal of the coupling bolt, because the bearing surface of the bolt's outer hexagon or inner hexagon has been slipped and damaged, and the removal will be more difficult. For bolts that have been rusted or have a lot of greasy dirt, the joints of bolts and nuts are often sprayed with solvents to allow the solvent to penetrate into the threads, which can be easily removed. When the sprocket is severely worn, the new sprocket and new sprocket should be replaced at the same time to ensure good meshing. It is not possible to replace only new sprockets or new sprockets individually. Otherwise it will cause poor meshing and accelerate the wear of the new sprocket or new sprocket. After the tooth surface of the sprocket is worn to a certain extent, it should be turned over in time (refer to the sprocket used for adjustable surface) to extend the use time.
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information about Silent Chain : https://www.hzqjchain.com/product/silent-chains/
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