High-temperature-resistant corrosion-resistant spring steel

Abstract

The invention discloses high-temperature-resistant corrosion-resistant spring steel. The high-temperature-resistant corrosion-resistant spring steel is characterized by comprising, by mass, 0.12%-0.23% of C, 0.01%-0.025% of S, 0.01%-0.03% of P, 0.25%-0.62% of V, 4.3%- 7.8% of Cr, 0.03%-0.5% of Ni, 0.15%-0.35% of Mo, 1.5%-3.2% of Al, 1.2%-3.5% of Ti, 1.2%-2.5% of Ni, 0.2%-0.85% of Zn, 0.13%-0.56% of Mn, 0.01%-0.52% of Si, and the balance Fe and unavoidable impurities. Through the high-temperature-resistant corrosion-resistant spring steel, the whole corrosion resistance, toughness and thermal fatigue resistance of a die can be improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to a high temperature resistant and corrosion resistant spring steel. Background technique [0002] Generally, the spring is made of metal or alloy, which is easy to be oxidized and corroded, so it is generally plated with an inactive metal or a metal that can form a dense oxide layer, or the alloy is mixed with a metal that is more active than the spring metal, when in a corrosive environment ( Such as: acidic environment), this alloy forms a primary battery, and under normal circumstances, hydrogen gas is generated at the active metal end, and the active metal is oxidized first in an easily oxidized environment, thereby protecting the spring material [0003] In the existing technology, after corrosion, a corrosion-resistant surface layer is re-sprayed, which is very inconvenient, increases production costs and technical difficulties, and affects surface dimensions and surface accuracy. At the same time, the existing springs ar...

AI Technical Summary

Problems solved by technology

[0003] The existing technology is often to re-spray a corrosion-resistant surface layer after corrosion, which is very inconvenient, increases the production cost and technical difficulty, and will affect the surface size and surface accuracy

At the same time, the existing springs are highly sensitive to temperature and cannot withstand higher temperatures, which seriously affects the application range of the springs.