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High-strength corrosion-resisting ferroalloy material for fastener

A technology for ferroalloys and fasteners, applied in the field of corrosion-resistant ferroalloys, can solve the problems of difficult processing, broken edges, cold pier and poor stamping performance, and achieve the effect of improving cold working performance, uniformity and strength

Inactive Publication Date: 2013-04-03
NINGBO TENGLING IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 are also broken edges.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-strength corrosion-resistant iron alloy material for fasteners, the composition of which is, by weight percentage, 0.08% carbon, 18.5% manganese, 0.3% silicon, 14.5% chromium, 0.03% molybdenum, 0.5% nickel, 0.5% vanadium, 0.8% titanium, 0.01% zirconium, 0.01% boron, 0.3% copper, 0.15% nitrogen, 0.001% lanthanum, and the balance is iron.

Embodiment 2

[0027] A high-strength corrosion-resistant iron alloy material for fasteners, the composition of which is, by weight percentage, 0.10% carbon, 18.9% manganese, 0.6% silicon, 15.0% chromium, 0.05% molybdenum, 1.0% nickel, 0.8% vanadium, 1.2% titanium, 0.03% zirconium, 0.03% boron, 0.5% copper, 0.25% nitrogen, 0.002% lanthanum, and the balance is iron.

Embodiment 3

[0029] A high-strength corrosion-resistant iron alloy material for fasteners, the composition of which is, by weight percentage, 0.09% carbon, 18.7% manganese, 0.5% silicon, 14.8% chromium, 0.035% molybdenum, 0.8% nickel, 0.65% vanadium, 1.0% titanium, 0.015% zirconium, 0.015% boron, 0.35% copper, 0.20% nitrogen, 0.0015% lanthanum, 0.015% niobium, 0.03% tungsten, and the balance is iron.

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PUM

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Abstract

The invention relates to a high-strength corrosion-resisting ferroalloy material for a fastener. The ferroalloy material comprises the following components in percentage by weight: 0.08-0.10% of carbon,18.5-18.9% of manganese, 0.3-0.6% of silicon, 14.5-15.0% of chromium, 0.03-0.05% of molybdenum, 0.5-1.0% of nickel, 0.5-0.8% of vanadium, 0.8-1.2% 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 iron alloys, in particular to a high-strength corrosion-resistant iron alloy 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 material also has a disadvantage of insufficient wear resistance and low elongation. In actual use, when the fastening force is large, bolts will break or nuts will crack. This is mainly d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/06
Inventor 任旭辉
Owner NINGBO TENGLING IND & TRADE
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