Vacuum solution treatment method for high-manganese-nitrogen nickel-free stainless steel

The invention provides a vacuum solution treatment method for high-manganese-nitrogen nickel-free stainless steel, and belongs to the technical field of stainless steel heat treatment. The method is used for solving the problem that after heat treatment, the high-manganese-nitrogen nickel-free stainless steel is difficult to achieve good comprehensive properties such as non-magnetic property, saltspray property, surface condition and hardness at the same time. According to the method, through the steps of vacuumizing, thermal homogenization treatment, final temperature interval heat preservation, deoxidation treatment, rapid cooling treatment and the like, the composition characteristics of the material are fully combined, and a vacuum solid solution heat treatment process is adopted, sothat a single austenite structure is formed by the material, sufficient dispersion, uniformity and consistency of nitrogen carbide are promoted, and the comprehensive performance of the high-nitrogennickel-free stainless steel