Sprocket assembly is the key part of scraper conveyor power drive, its wear resistance and strength determine the working efficiency of the whole fully mechanized mining face. Wear resistance and strength are determined by material and heat treatment. According to the drawing and processing requirements of the original factory, the common materials of sprocket body are 42CrMo and 40CrNiMoA, and the sprocket used in well must be quenched and tempered, and the chain socket must be quenched, so that it has good comprehensive mechanical properties. In order to avoid the sprocket teeth and chain can not mesh or fracture due to low strength due to long-time wear. Today, Shuangzhi coal machine will take you to understand the performance difference of 42CrMo and 40CrNiMoA sprocket.

According to the working environment of sprocket, the friction between sprocket and chain mainly occurs at the chain socket, so the quenching hardness and depth of hardened layer at the chain socket are very important. For the sprocket made of 42CrMo and 40CrNiMoA, the quenching hardness of both materials can reach hrc50-55. The depth of hardened layer of 42CrMo is 8mm, and that of 40CrNiMoA is 12mm.

Compared with 42CrMo material, 40CrNiMoA material increases Ni element, improves its own plasticity and toughness, and improves corrosion performance. Combined with Cr and Mo, 40CrNiMoA material can improve thermal strength and hardenability, and has good high temperature oxidation resistance and oxidation resistance. Therefore, it is more suitable for fully mechanized mining face with bad environment and large coal mining capacity. The main engine manufacturers have different requirements for different specifications of chain wheel. According to the size of coal mining amount and the mine production environment in different mining areas, the main engine manufacturers determine how to select sprocket materials to meet the production requirements of the mine.

Wear of sprocket components is inevitable. Shuangzhi Coal Machinery Co., Ltd. has been focusing on the manufacturing and repair of chain wheel components for many years. Its business covers all major mining areas and has been highly praised by the industry. Welcome new and old friends to inquire or visit our factory: 0575-83086838