Preparation method of graphene steel-based alloy

A graphene and alloy technology, applied in the field of preparation of graphene steel-based alloys, can solve the problems of increased grain boundary ratio, cumbersome process, and no data on the corrosion resistance of the alloy, so as to achieve enhanced corrosion resistance and overall The effect of performance improvement

Active Publication Date: 2017-08-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increase the proportion of small-angle grain boundaries of ferrite in duplex stainless steel, and increase the proportion that satisfies the relationship of specific orientation (K-S and N-W). The increase in the density of these low-energy interfaces improves the corrosion ability between alloy grain boundaries. Its patent is through Two times of vacuum condition heating and heat preservation treatment process, the process is relatively cumbersome
At the same time, it does not give the corrosion resistance data of the alloy, and its corrosion resistance ability is unknown

Method used

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  • Preparation method of graphene steel-based alloy
  • Preparation method of graphene steel-based alloy
  • Preparation method of graphene steel-based alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Carry out simple mechanical treatment on the surface of carbon steel to remove most of the stains on the surface, then mechanically polish the sample to the mirror surface, and then place the sample in an ethanol solution for ultrasonic treatment; Ultrasonic cleaning in deionized water for 5 minutes, twice.

[0036] (2) Put the sample treated in step (1) into the chemical degreasing solution that has been prepared, and perform chemical degreasing treatment on the sample after ultrasonication. The degreasing formula: NaOH: 60g / L, NaOH: 60g / L, Na 2 CO 3: 20g / L, Na 3 PO 4 : 50g / L, NaSiO 3 : 10g / L, the degreasing temperature is 70°C, and the ultrasonic degreasing time is 0.5min.

[0037] (3) Soak the sample treated in step (2) directly in the acid solution, 30wt% HCl hydrochloric acid: 300g / L; the activation temperature is 25°C, and the activation time is 10s.

[0038] (4) In the step (3), the sample after the above treatment is placed in the pre-nickel plating sol...

Embodiment 2

[0043] (1) Steps 1, 2, 3, 4 are the same as in Example 1

[0044] (2) Step 5 nickel plating current density is 0.6A / dm 2 , the temperature is 35°C, the electroplating time is 50 minutes, and the electroplating thickness is 2 μm.

[0045] (3) Copper plating: current density 6A / dm 2 , the electroplating time is about 90 minutes, and the sample with a plating thickness of 200 μm is ultrasonically cleaned twice with deionized water, and dried under nitrogen.

[0046] (4) The dried sample in the step (6) is placed on the quartz boat, then put into the tube furnace, sealed, vacuumized, fed with argon, and repeatedly washed three times, with hydrogen 100sccm as the protective gas, The heating rate is 30°C / min, to 900°C, after reaching the set temperature, change the gas CH 4 and H 2 30sccm and 80sccm gas respectively, the reaction time is 15 minutes, after the reaction is completed, the sample is placed at room temperature and rapidly cooled to obtain the prepared sample.

Embodiment 3

[0048] (1) Steps 1, 2, 3, 4 are the same as in Example 1

[0049] (2) Step 5 nickel plating current density is 1A / dm 2 , the temperature is 25° C., the electroplating time is 60 minutes, and the electroplating thickness is 4.5 μm.

[0050] (3) Copper plating: current density 10A / dm 2 , the electroplating time was about 110 minutes, and the samples with a plating thickness of 450 μm were ultrasonically cleaned twice with deionized water, and dried under nitrogen.

[0051] (4) The dried sample in the step (6) is placed on the quartz boat, then put into the tube furnace, sealed, vacuumized, fed with argon, and repeatedly washed three times, with hydrogen 100sccm as the protective gas, The heating rate is 25°C / min, to 1000°C, after reaching the set temperature, change the gas CH 4 and H 2 30sccm and 100sccm gas respectively, the reaction time is 20 minutes, after the reaction is completed, the sample is placed at room temperature and rapidly cooled to obtain the prepared sampl...

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Abstract

The invention discloses a preparation method of graphene steel-based alloy. The method comprises the following steps that a steel metal substrate is selected, and the steel metal substrate is subjected to cleaning and surface activating processing; (2), a sample pretreated through the above step is subjected to nickel plating processing; (3), the nickel-plated sample is subjected to copper plating processing, and a product is washed and dried; (4), the dried sample is subjected to high-temperature chemical vapor deposition to generate graphene, while the graphene is generated, the alloy at the interface between the nickel-plated layer / steel substrate and the nickel-plated layer / copper-plated layer is controlled, then cooling is performed, and the alloy is prepared. After the steel metal substrate is subjected to nickel plating and copper plating, the surface of the steel metal substrate generates the graphene in the high-temperature condition; and meanwhile, the steel substrate / the nickel-plated layer forms ferronickel or iron nickel chromium alloy, the nickel-plated layer and the copper-plated layer form copper nickel alloy, the substrate double-layer alloy is matched with the graphene, and the effects that the overall corrosion-resistant performance of a composite material is enhanced, and conductivity and the heat-conducting property of the metal substrate are not influenced are achieved.

Description

technical field [0001] The invention belongs to the technical field of metal functional materials, and in particular relates to a preparation method of a graphene steel-based alloy. Background technique [0002] At present, carbon steel and copper-clad steel are generally used as grounding grids in industry, but the biggest problem at present is that the grounding grid material is easily corroded, resulting in performance degradation or even complete loss of the effect of the grounding grid material. [0003] Traditional steel anticorrosion methods mainly include organic coating, polymer protection, oxide layer protection, anodic oxidation, chemical modification, different metal coating, painting, etc., but most of them need to change the size, color and Optical properties, and affect the electrical and thermal properties of materials, and the organic or inorganic materials used have more or less environmental impact on the local use, so it is an inevitable trend to develop ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/12C25D5/36C25D3/12C25D3/38C23C16/26C23C28/00
CPCC23C16/26C23C28/321C25D3/12C25D3/38C25D5/12C25D5/36
Inventor 冀运东程少华李锋于银亮
Owner WUHAN UNIV OF TECH
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