You can see the advantages of Guanhang's lifting chain, such as strong load-bearing capacity, durability, wear resistance, and resistance to deformation, but you cannot see the "981 difficulties" that the chain has experienced. You know that chains require various advanced production processes such as quenching, heat treatment, carburizing, blackening, nickel plating, and tempering, but you don't know why forged chains need to be quenched first and then tempered.

After consulting with frontline technicians, we can learn that using quenching technology can greatly improve the strength, hardness, wear resistance, and fatigue resistance of the lifting chain, and it has strong tensile strength but low ductility. In heavy lifting work, even if overloaded, it is not easy to deform, effectively ensuring the safety of lifting work.

After the quenching process of the lifting chain is completed, the tempering process can be carried out to reheat the steel to a temperature below Ac1, and after insulation, it can be cooled for a certain period of time. The benefits are: reducing the hardness of the quenching process, compensating for its shortcomings, eliminating the stress of quenching, and improving the toughness of the chain.

Moreover, the manufacturing process of Guanhang lifting chains is extremely meticulous. After quenching, the tempering process will be completed within 24 hours to ensure uniform tempering and avoid cracks and deformation of the chain plate.