The surface of the lifting chain is mainly used to increase the surface hardness of the chain to make it more abrasion. Carburizing: Carburizing is the process of carbon atoms to penetrate into the steel surface layer. The surface of the carburizing chain has high hardness and abrasion resistance, and the center part of the chain still has good toughness and plasticity. The price of the carbon chain is relatively expensive than other surface treatment prices. Generally, high -speed gourds are applied more. High -speed gourd runs fast, and the wear resistance of the chain is high. The chain can be treated according to the customer's requirements.