The mine high strength round link chain is the traction component of coal mine scraper conveyor. Its quality and performance will directly affect the working efficiency of equipment and coal output of coal mine. The mine high strength round link chain is a consumable item, which is easy to wear and damage during use. Once there is fracture, damage will affect work efficiency.

The details of improving the durability life quality mainly lie in increasing the inner width properly to improve the fatigue strength of the ring chain; through the composite strengthening and toughening treatment, the particles of its tissue are refined and the stress concentration is reduced; the heat treatment of eliminating internal stress, shot peening surface treatment, surface nitriding, carburizing, carbonitriding, metallizing, surface coating and other surface strengthening processes are adopted to improve the residual stress on the surface of the ring chain In order to prevent the growth of microcracks and reduce the corrosion fatigue damage of materials.

Compared with the welding process, each technical index of the die forging chain is obviously superior to that of the welding chain. The continuous fiber structure of the whole forging chain is good. The test results show that its impact resistance, tensile and bending properties are higher than the standard requirements, and the product performance is stable and reliable.