Smelting method of high-aluminum nitriding steel

Abstract

The invention belongs to the technical field of alloy structural steel, and particularly relates to a manufacturing method of high-aluminum nitriding steel. The process route of EAF-CONVERTER smelting and LF+VD+CCM are adopted to smelt the high-aluminum nitriding steel, and according to the component requirement range of the obtained high-aluminum nitriding steel, the high-aluminum nitriding steel comprises 0.35% to 0.40% of C, 0.20% to 0.30% of Si, 0.40% to 0.50% of Mn, 1.40% to 1.50% of Cr, 0.15% to 0.25% of Mo, 0.75% to 1.00% of Al, not larger than 0.020% of P, not larger than 0.015% of S, and the balance Fe. Round steel obtained through rolling is even in steel texture, high in cleanness and stable in performance quality.

Description

technical field

[0001] The invention belongs to the technical field of alloy structural steel, and in particular relates to a method for manufacturing high-aluminum nitrided steel. Background technique

[0002] High aluminum nitride steel is a quenched and tempered nitriding steel based on high aluminum steel. The surface is nitrided to form an aluminum nitride (AlN) layer. The dispersion strengthening of aluminum nitride is used to improve the hardness and strength of the surface. , and can maintain a certain hardness at a higher temperature (600-700°C). At the same time, this steel type also contains an appropriate amount of molybdenum, which can effectively inhibit high-temperature tempering brittleness. Therefore, this steel type has good hardenability and resilience. Less fire brittleness tendency, good high temperature processability, high wear resistance and fatigue resistance. This steel grade is widely used in the production of nitrided parts with high wear resista...