Manufacturing method for corrosion-resistant mirror die steel

Abstract

Corrosion-resistant mirror die steel and a manufacturing method therefor. The components of the die steel are: 0.35-0.45% of C, 12-15% of Cr, less than or equal to 0.05% of Co, 0.4-0.7% of Mn, 0.35-0.55% of Si, 0.08-0.20% of Mo, 0.10-0.30% of Ni, 0.08-0.30% of W, 0.10-0.30% of V, 0.01-0.05% of Ti, less than or equal to 0.020% of P, less than or equal to 0.012% of S, and the balance is Fe. The manufacturing method comprises: smelting to obtain liquid steel, casting a steel billet, annealing before forging, forging, annealing after forging, and thermal processing.