Corrosion-resisting ferroalloy material for fastener

Abstract

The invention relates to a corrosion-resisting ferroalloy material for a fastener. The ferroalloy material comprises the following components in percentage by weight: 0.08-0.10% carbon, 15-15.5% manganese, 0.3-0.6% silicon, 14.5-15.0% of chromium, 0.03-0.05% of molybdenum, 0.5-1.0% of nickel, 0.03-0.05% of vanadium, 0.1-0.3% of titanium, 0.01-0.03% of zirconium, 0.01-0.03% of boron, 0.3-0.5% of copper, 0.15-0.25% of nitrogen, 0.001-0.002% of lanthanum, and the balance of iron. The ferroalloy produced by the technical scheme is a ferroalloy material with relatively high mechanical properties, wear resistance, tenacity and wear resistance.

Description

technical field [0001] The invention belongs to the field of corrosion-resistant ferroalloys, in particular to a corrosion-resistant ferroalloy material for fasteners. Background technique [0002] Fasteners such as bolts and nuts are generally made of carbon steel, stainless steel, high-strength steel, etc. Except for stainless steel, other materials have poor corrosion resistance. During use, severe corrosion will occur and the bolts and nuts will be damaged. Inseparable, especially outdoors or in harsh environments, fasteners made of the above materials are disposable and must be replaced when repairs or maintenance are performed. The production of fasteners made of stainless steel can only be used in some special places due to the high cost. Moreover, the above-mentioned materials also have a disadvantage of insufficient wear resistance and low elongation. In actual use, when the fastening force is large, the bolts will break or the nuts will crack. [0003] There is a...

AI Technical Summary

Problems solved by technology

[0002] Fasteners such as bolts and nuts are generally made of carbon steel, stainless steel, high-strength steel, etc. Except for stainless steel, other materials have poor corrosion resistance. During use, severe corrosion will occur and cause bolts and nuts to Inseparable, especially outdoors or in harsh environments, fasteners produced from the above materials are disposable and must be replaced when repairs or maintenance are performed

However, stainless steel fasteners can only be used in some special places due to high cost.

Moreover, the above-mentioned material also has a disadvantage of insufficient wear resistance and low elongation. In actual use, when the fastening force is large, the bolts will break or the nuts will crack.

[0003] There are also technologies that use chromium-manganese-nitrogen series iron alloys to produce fasteners, but the cold work hardening rate of this type of iron alloys rises too fast, the processing is difficult, and the cold pier and stamping performance is poor, and there is a broken edge phenomenon