What is bright annealing and what are the advantages of bright annealing technology-UZO annealing machine
Since metals such as copper and copper alloys are prone to oxidation during heat treatment, annealing is required. Next, Kehua will take you to understand what is bright annealing, and what are the advantages of bright annealing technology? What is bright annealing? Bright annealing is commonly known as bright annealing. The following natural cooling will have brilliance and will not cause decarburization. Oxidation and decarburization occur during heating and cooling during ordinary annealing, so the heat-treated steel undergoes additional processing, which increases the loss and cost of metal, so bright annealing is often used. Bright annealing What are the advantages of bright annealing technology? 1. Eliminate work hardening and obtain satisfactory metallographic structure. When the performance requirements are different, the requirements for the metallographic structure after bright annealing are different, and the process of bright heat treatment is also different. 2. Obtain an oxidation-free bright surface with good corrosion resistance. Since bright annealing is a heat treatment of strip steel in a mixed gas protective atmosphere of hydrogen and nitrogen, a bright surface without oxidation is obtained by strictly controlling the protective atmosphere in the furnace, especially the purity, residual oxygen and dew point. Kehua believes that compared with the surface obtained by ordinary annealing and pickling, because there is no oxidation process, the phenomenon of poor chromium on the surface of the strip is reduced, and its corrosion resistance is better than that of the 2B plate after polishing. 3. Bright treatment maintains the smoothness of the rolling surface, and a bright surface can be obtained without post-processing. After bright annealing, the surface of the steel strip retains the original metallic luster, and a bright surface close to the mirror surface has been obtained. Under general requirements, the surface can be directly used without processing. 4. Strip steel with special rolling pattern surface can be developed. Since the surface of the steel strip is not changed during the annealing process, the rolling surface pattern can be completely retained, and the cold-rolled special pattern strip can be easily developed. Bright annealing is a relatively advanced annealing technology at present. After bright annealing, it can effectively prevent copper and copper alloys and other metals from oxidizing during heat treatment.