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A corrosion-resistant hinge

A corrosion-resistant, hinged technology, applied in the field of alloy material processing, can solve the problems of low strength and corrosion resistance, general performance, etc., and achieve the effect of improving corrosion resistance, improving corrosion resistance, improving surface hardness and wear resistance

Active Publication Date: 2017-12-22
NINGBO QIANHAO METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hinges in the prior art are generally made of ordinary alloy steel through ordinary forming processes, and their performance is relatively ordinary, especially the strength and corrosion resistance are low

Method used

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  • A corrosion-resistant hinge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Raw material steelmaking: according to the composition elements and mass percentage of the alloy steel used in the hinge: C: 0.12%, Cr: 1.5%, Si: 0.16%, Mn: 1.0%, Al: 0.04%, N: 0.012%, Ti: 0.16 %, S: 0.015%, V: 0.012%, P≤0.015%, the balance is Fe and unavoidable impurities; the raw materials are smelted into molten steel, and the molten steel is vacuum smelted, poured, rolled into steel plates, and the steel plates are processed into shapes , to get the hinge blank.

[0031] The hinge blank was cryogenically treated at -150°C for 1.2h, and then the temperature was raised to 240°C at a rate of 4°C / min for low-temperature tempering treatment for 135min to obtain a hinge semi-finished product.

[0032] The hinge semi-finished product was treated in the electroplating solution at 42°C for 40 minutes. The composition of the electroplating solution was: zinc ions 20g / L, nickel ions 2.4g / L, sodium hydroxide 180g / L, tetraethylenepentamine 12g / L, ethyleneimine 10ml / L, citric ac...

Embodiment 2

[0034] Raw material steelmaking: according to the composition elements and mass percentage of the alloy steel used in the hinge: C: 0.14%, Cr: 1.45%, Si: 0.18%, Mn: 1.05%, Al: 0.042%, N: 0.01%, Ti: 0.20 %, S: 0.018%, V: 0.10%, P≤0.015%, the balance is Fe and unavoidable impurities; the raw materials are smelted into molten steel, and the molten steel is vacuum smelted, poured, rolled into steel plates, and the steel plates are processed into shapes , to get the hinge blank.

[0035] The hinge blank was cryogenically treated at -160°C for 1.4h, and then heated to 238°C at a rate of 3.8°C / min for low-temperature tempering treatment for 140min to obtain a hinge semi-finished product.

[0036] Treat the hinge semi-finished product in the electroplating solution at 40°C for 45 minutes. The composition of the electroplating solution is: zinc ion 22g / L, nickel ion 2.0g / L, sodium hydroxide 160g / L, tetraethylenepentamine 14g / L, ethyleneimine 10ml / L, citric acid 5.2g / L, potassium sodiu...

Embodiment 3

[0038] Raw material steelmaking: according to the composition elements and mass percentage of the alloy steel used in the hinge: C: 0.15%, Cr: 1.4%, Si: 0.20%, Mn: 0.8%, Al: 0.05%, N: 0.015%, Ti: 0.12 %, S: 0.022%, V: 0.08-0.15%, P≤0.015%, the balance is Fe and unavoidable impurities; the raw materials are smelted into molten steel, and the molten steel is vacuum smelted, poured, rolled into steel plates, and the steel plates Processing and molding to obtain hinge blanks.

[0039] The hinge blank was cryogenically treated at -138°C for 1.5h, and then heated to 250°C at a rate of 3°C / min for low-temperature tempering treatment for 120min to obtain a hinge semi-finished product.

[0040] Treat the hinge semi-finished product in the electroplating solution at 45°C for 30 minutes. The composition of the electroplating solution is: zinc ions 15g / L, nickel ions 2.8g / L, sodium hydroxide 150g / L, tetraethylenepentamine 15g / L, ethyleneimine 8ml / L, citric acid 6g / L, potassium sodium tar...

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Abstract

The invention relates to a corrosion resistant hinge, and belongs to the technical field of alloy material processing. The corrosion resistant hinge is made of alloy steel. The alloy steel comprises, by mass, 0.10%-0.15% of C, 1.4%-1.6% of Cr, 0.14%-0.20% of Si, 0.8%-1.15% of Mn, 0.03%-0.05% of Al, 0.008%-0.015% of N, 0.12%-0.22% of Ti, 0.005%-0.022% of S, 0.08%-0.15% of V, 0-0.015% of P, and the balance Fe and inevitable impurities. The corrosion resistant hinge is formed through the steps of raw material steelmaking, subzero treatment, electroplating, passivation and sealing treatment processing. The corrosion resistant hinge is good in corrosion resistance and mechanical property.

Description

technical field [0001] The invention relates to a corrosion-resistant hinge, which belongs to the technical field of alloy material processing. Background technique [0002] Steel is used in various aspects of industrial production and life. It plays a very important role in human life and work. It is the basis of scientific and technological development. However, steel is easy to rust in the atmosphere and the corrosion process is quite complicated. Different degrees of adverse effects on life, resulting in unnecessary economic losses. In my country, according to the 2008 survey results of the China Industrial and Natural Environment Corrosion Investigation Project Team, the direct economic loss caused by corrosion reached 230 billion yuan, and the indirect economic loss was 500-600 billion yuan, which was equivalent to 100% of my country's gross national product in that year. 5%. Therefore, it is very important to study methods to prevent steel corrosion. [0003] A hing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C38/14C22C38/12C22C38/06C22C38/04C22C38/02C22C33/04C21D6/04C25D3/56
CPCC21D6/04C22C33/04C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C25D3/56
Inventor 蒋建平蒋乾
Owner NINGBO QIANHAO METAL PROD
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