Selection lifting chain are the following items: 1. Inside / outside links deformation, cracks, corrosion 2. embroidered pin is deformed or rotated, embroidered eclipse 3. Roller whether cracks, damaged by excessive wear 4. Lifting chain joints are loose deformation abnormal sounds or abnormal vibration during high-intensity lifting chain 5. The operation of the chain lubrication is good. Lifting chain price is based on the different types, specifications, models, materials lifting chain lifting chain administered prices. Chen power lifting chain models: diameter 6 ~ 20mm lifting chain lifting chain Which is best, including 80 and 100 lifting chain lifting chain types. Lifting chain chain can be adjusted according to the height of lift lifting objects of different lengths crane essential extract important means to improve the operational efficiency of the crane to expand the operating range of the crane plays an important role. Chen of the company a brief introduction about the G80 lifting chain common method of heat treatment: annealing, normalizing, quenching lifting chain prices, tempering, carburizing, nitriding lifting chain, carbonitriding, boronizing. Aging treatment artificial aging, natural aging process. Annealing, the workpiece is heated to 30-50 degrees above Ac3, holding a certain time, with the furnace cooled to 500 degrees at cooling in space. Normalizing, the steel is heated to above Ac3 or Acm, an operation after removing heat from the furnace in air-cooled. Hardening, the steel is heated to above Ac3 or Ac1, rapid cooling after incubation in water or oil, coolant, has been unstable organization. Tempering the hardened steel reheated to a temperature below Ac1, after cooling to room temperature incubation of the heat treatment process. Black lifting chain, lifting chain, lifting chain chen chen sling from Hebei Manufacturing Limited. Hebei chen sling Manufacturing Co., Ltd. (www.qzhon.com) strong, credible, in Baoding forestry machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead chen sling into the brilliant and you work for a better future!