Improvement of Heat Treatment Process of Gear Shaft 45 Steel

In this paper,we give a mechanical performance testing and metallurgical microstructure analysis on the gear shaft of the 45steel current situation of quenched and tempered,observe bulky organization and various forms of ferrite,the organization and performance failed to achieve tempering heat treatment specification requirement.Combined with relevant materials,we research the heat treatment process and performance of Gear shaft intercritical hardening,formulate the heat treatment process parameters,and provide the basis for manufacturing process.