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Cold-rolled steel strip products are one of the important products widely used in all walks of life in the economy, and are also the main products in our steel industry. The material properties, geometric dimensions and surface quality of cold-rolled strip products are the main indicators to measure their quality. Vacuum hardened spring steel wire At present, the material properties and geometric dimensions of cold-rolled strip steel products can basically achieve satisfactory results, but with the continuous improvement of surface quality requirements in industries such as automobiles and home appliances, its surface quality has become a bottleneck that plagues many steel mills question. Vacuum Heat Treatment Applications for Metal Machine Tools and Gear Parts Because the final surface quality of strip steel products will be affected by many links and factors such as equipment precision, process parameters, operating skills, production environment, storage and transportation, it is very difficult to improve and maintain its quality level. Many steel mills have also proposed the research topic of cold-rolled strip surface to improve the surface quality of strip steel and meet the increasing market demand of users.Pay Attention to Vacuum Tempering to Improve the Quality of Quenched Parts Most of the cold-rolled strip products need recrystallization annealing heat treatment after cold rolling to eliminate the work hardening produced during cold rolling, so that the strip can obtain good mechanical properties and surface quality. In large-scale production, there are usually two annealing methods of continuous furnace annealing and bell furnace annealing for cold-rolled strip steel rolled hard coils.Analysis of vacuum heat treatment process for wind power products