3Cr17 plastic die steel module and heat treatment method thereof

The invention belongs to the field of metal material heat treatment, and discloses a 3Cr17 plastic die steel module and a heat treatment method thereof.The heat treatment method comprises the steps that spheroidizing annealing is conducted on the forged and formed 3Cr17 plastic die steel module; the 3Cr17 plastic die steel module subjected to spheroidizing annealing is subjected to quenching treatment; and the 3Cr17 plastic die steel module subjected to quenching treatment is subjected to multiple times of tempering treatment. According to the method, a heat treatment process route of spheroidizing annealing after forging, quenching treatment and multiple times of tempering treatment is adopted, meanwhile, appropriate heat treatment process parameters are matched, and the 3Cr17 plastic die steel module with the hardness being 30-35 HRC, the microscopic structure being a uniform and fine sorbite structure and the grain size being larger than or equal to the fifth grade according to the national standard GB/T63