Hinge

A hinge and processing technology, applied in the field of hinges, can solve the problems of general performance, low strength and corrosion resistance, and achieve the effect of improving surface hardness and wear resistance, improving surface hardness, and improving hardness and wear resistance.

Active Publication Date: 2016-12-21
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 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%, Nb: 0.08%, 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, and rolled into steel plates. And the steel plate is processed and shaped to obtain the hinge blank.

[0032] 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.

[0033] 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...

Embodiment 2

[0035] 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%, Nb: 0.06%, 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, and rolled into steel plates. And the steel plate is processed and shaped to obtain the hinge blank.

[0036] 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.

[0037] Treat the hinge semi-finished product in the electroplating solution at 40°C for 45min, 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 sodium tartrate 16g / L; electroplating is carried...

Embodiment 3

[0039] 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%, Nb: 0.05%, 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 and rolled into and processing the steel plate to obtain a hinge blank.

[0040] 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.

[0041] Treat the hinge semi-finished product in the electroplating solution at 45°C for 30min, zinc ion 15g / L, nickel ion 2.8g / L, sodium hydroxide 150g / L, tetraethylenepentamine 15g / L, ethyleneimine 8ml / L, citric acid 6g / L, potassium sodium tartrate 15g / L; electroplating is carried out in three stages in sequence...

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Abstract

The invention relates to a hinge, and belongs to the technical field of alloy materials. The hinge is made of alloy steel which consists of the following composition elements in percentage 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, 0.03-0.12% of Nb, less than or equal to 0.015% of P, and the balance Fe and inevitable impurities; and the hinge is formed by raw material smelting, cryogenic treatment, electroplating, purifying and sealed processing. The hinge is relatively good in corrosion resistance and mechanical property.

Description

technical field [0001] The invention relates to a hinge, which belongs to the technical field of alloy materials. 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 hinge, also known as a hinge, is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/04C22C38/02C22C38/06C22C38/14C22C38/12C21D6/04C21D9/00C25D3/56C25D5/18C23C22/53C23C22/42
CPCC21D6/002C21D6/04C21D9/0087C21D2211/008C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C23C22/42C23C22/53C25D3/565C25D5/18
Inventor 蒋建平蒋乾
Owner NINGBO QIANHAO METAL PROD
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