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Nickel-cobalt-plated nanometer superhard coating liquid and high-pressure nozzle covering coating liquid

A nickel-cobalt-plated nano-technology, which is applied in the field of flat uniform jet nozzles, can solve problems such as difficult to obtain guarantees, and achieve the effects of not easy to wear, compact structure, and improved service life

Inactive Publication Date: 2014-11-05
YANGZHOU YEYUN METALLURGICAL EQUIP FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an important index to measure its performance, the uniform performance and high-pressure erosion resistance and scaling corrosion performance, that is, the uniformity of the high-pressure liquid ejected from the nozzle in all directions and the performance of maintaining a constant speed of the ejected liquid, the nozzle The wear resistance and anti-scaling corrosion performance are often difficult to be guaranteed; in order to solve this problem, the conventional method is to sinter the tungsten carbide hard powder metallurgy material widely used in this industry in China, but it is similar to that imported from Germany. Compared with this product, its service life is only half of the imported product

Method used

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  • Nickel-cobalt-plated nanometer superhard coating liquid and high-pressure nozzle covering coating liquid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] The present invention uses sodium pyrophosphate as a complexing agent and is compounded by adding cobalt sulfate, sodium hypophosphite, sodium citrate, boric acid and ZE brightener.

[0017] The ratio of each component is: based on 1L of sodium pyrophosphate, nickel sulfate: 40g; cobalt sulfate: 15g; sodium hypophosphite 25g; sodium citrate 40g; boric acid 20g; ZE brightener 30g.

[0018] The inner and outer surfaces of the high-pressure nozzle sintered by tungsten carbide powder metallurgy are coated with a coating made of nickel-plated cobalt nano-superhard coating solution by chemical treatment process. The manufacturing process is as follows: the nozzle is placed in the coating solution, Add to 80 degrees and keep warm for 3 hours.

Embodiment 2

[0020] The present invention uses sodium pyrophosphate as a complexing agent and is compounded by adding cobalt sulfate, sodium hypophosphite, sodium citrate, boric acid and ZE brightener.

[0021] The ratio of each component is: based on 1L of sodium pyrophosphate, nickel sulfate: 30g; cobalt sulfate: 10g; sodium hypophosphite 20g; sodium citrate 50g; boric acid 15g; ZE brightener 20g.

[0022] The inner and outer surfaces of the high-pressure nozzle sintered by tungsten carbide powder metallurgy are coated with a coating made of nickel-plated cobalt nano-superhard coating solution by chemical treatment process. The manufacturing process is as follows: the nozzle is placed in the coating solution, Add to 90 degrees and keep warm for 2 hours.

[0023] Electroless cobalt plating is to use the reduction effect of strong reducing agent—sodium hypophosphite in the electroless cobalt plating solution to reduce cobalt ions to metal cobalt, which is deposited on the surface of the pa...

Embodiment 3

[0025] In the present invention, fluoroboric acid, water, and alcohol are miscible to make a complexing agent; cobalt sulfate, sodium hypophosphite, sodium citrate, boric acid, and ZE brightener are compounded.

[0026] Said, fluoboric acid: water: alcohol=1:1:1, weight ratio; said alcohol is n-butanol CH3CH2CH2CH2OH.

[0027] The ratio of each component is: based on 1L of fluoboric acid complexing agent, nickel sulfate: 30g; cobalt sulfate: 5g; sodium hypophosphite 22g; sodium citrate 45g; boric acid 25g; ZE brightener 25g.

[0028] A nickel-cobalt-plated nano-superhard coating high-pressure nozzle, the inner and outer surfaces of the high-pressure nozzle sintered by tungsten carbide powder metallurgy are coated with a coating made of nickel-cobalt nano-superhard coating solution by chemical treatment process, and its The manufacturing process is as follows: put the nozzle in the coating solution, add it to 85 degrees, and keep it warm for 2.5 hours.

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Abstract

The invention relates to nickel-cobalt-plated nanometer superhard coating liquid and a high-pressure nozzle covering the coating liquid. The coating liquid is prepared in the following steps: by taking sodium pyrophosphate or fluoboric acid as a complexing agent, and adding cobalt sulfate, sodium hypophosphite, sodium citrate, boric acid and ZE brighteners for compounding. A manufacturing process of the nozzle comprises the following steps: arranging the nozzle in the coating liquid, heating the coating liquid to the temperature of 80 to 90 DEG C, and preserving the temperature for over 2 hours. According to the nickel-cobalt-plated nanometer superhard coating, wear-resistant, anticorrosive, high-pressure-scouring-resistant and cooling medium scaling-resistant coatings are formed on inner and outer surfaces of the high-pressure nozzle by adopting a process method for performing chemical treatment on the whole surface of the nozzle by using a runner, so that when the nozzle is difficultly worn during operation, the thermal stability temperature and high-temperature oxidation resistance temperature of the nozzle are higher than 1100 DEG C according to detection, the hardness is higher than HRC75, the high pressure scouring resistance is over 250MP, the bonding strength between the coating and the matrix is higher than 100N, cellular matters are uniformly distributed on the surface of the coating due to check, the tissue is dense, and expensive imported like products are replaced.

Description

technical field [0001] The invention relates to the technical field of high-pressure cooling systems in steel mills, in particular to a flat uniform jet nozzle capable of spraying high-pressure cooling liquid at high-pressure and constant-flow. Background technique [0002] Flat nozzles have the advantages of high injection pressure and fast injection speed, and are widely used in steel rolling and ingot production in various steel mills. However, as an important index to measure its performance, the uniform performance and high-pressure erosion resistance and scaling corrosion performance, that is, the uniformity of the high-pressure liquid ejected from the nozzle in all directions and the performance of maintaining a constant speed of the ejected liquid, the nozzle The wear resistance and anti-scaling corrosion performance are often difficult to be guaranteed; in order to solve this problem, the conventional method is to sinter the tungsten carbide hard powder metallurgy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/50
Inventor 高明安王学军刘建邵玉金
Owner YANGZHOU YEYUN METALLURGICAL EQUIP FACTORY