Research on Preparation Method and Mechanism of Cylinder Ultra-fine Crystal Metal Spinning

Modern industry requires metal materials with high forming quality and excellent mechanical properties. Ultra-fine grain metal makes ordinary steel obtain good comprehensive performance, reduce the consumption of high-performance metal, improve material utilization and performance, and is of great significance to the manufacturing industry. In this paper, the body-shaped cubic metal 20# steel cylinder parts are taken as research objects. By exploring the forming principle of ultra-fine crystal structure cylindrical parts, the finite element simulation of the strong spinning process of the cylindrical parts is carried out. And the forming process experiment of ultra-fine grain structure spinning and heat treatment experiment are also carried out. Thus, the plastic deformation mechanism is revealed, and a method for preparing an ultra-fine grain material based on combination of strong spinning and recrystallization annealing is proposed. The research reveals the relationship between mechanical properties and microstructure of ultra-fine grained materials. The research results have great scientific significance for promoting the development of ultra-fine grain metal material preparation technology.