Common chain heat treatment: annealing, normalizing, quenching, tempering, carburizing, nitriding, 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, lifting chain slings, steel is heated to above Ac3 or Acm, removed from the furnace after incubation in an air-cooled operation. 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. Natural aging treatment, the workpiece stand at room temperature conditions or prolonged storage of natural aging phenomenon occurs, lifting chain parameters, called natural aging. Artificial aging treatment, the use of the workpiece is heated to a higher temperature and a shorter time for aging treatment aging treatment, Jinhua lifting chain, called artificial aging. Chen professional production of 80, 100 patent black, galvanized chain, 6-32 mm, raw materials are 20MN2, using advanced production line equipment, the whole strict quality control, through the use of low-carbon steel fire hot dip treatment process is made by a variety of testing equipment to ensure strict compliance with its intensity high intensity lifting chain standards. ensure product impact resistance, carrying capacity, toughness and elongation. improve its safety performance and service life. Lifting chain where good, Jinhua lifting chain, lifting chain standard (view) from Hebei chen sling Manufacturing Limited. Hebei chen sling Manufacturing Co., Ltd. (www.qzhon.com) is a professional. "Sling. Sling" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "chen" brand has a good reputation. We adhere to the "service first, customer first" principle, so chen sling in chains, sprockets, has won the trust of the public, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!