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Reusable low-temperature aluminizing agent and aluminizing method

An aluminizing agent and aluminizing technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as long-term safe operation of mechanical devices, peeling of oxide skin on the surface of parts, material fracture failure, etc. Achieve the effect of improving high temperature oxidation and corrosion resistance, improving the efficiency of aluminizing process, and low aluminizing temperature

Pending Publication Date: 2022-05-13
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, long-term operation under high temperature and strong corrosive conditions will cause problems such as scale peeling and corrosion on the surface of parts, which will eventually lead to material fracture and failure, affecting the long-term safe operation of mechanical devices

Method used

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  • Reusable low-temperature aluminizing agent and aluminizing method
  • Reusable low-temperature aluminizing agent and aluminizing method
  • Reusable low-temperature aluminizing agent and aluminizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Perform surface aluminizing treatment on GH4169 superalloy parts according to the following steps:

[0060] (1) Preparation of aluminizing agent: fully stir 6 kg of aluminum powder with a particle size of 60 mesh, 0.5 kg of ammonium chloride, 0.5 kg of aluminum trichloride, 1 kg of titanium powder and 92 kg of calcined alumina in a mixer for 30 Minutes, get 100 kg of aluminizing agent.

[0061] (2) Canning: Using the powder embedding method, first lay a layer of aluminizing agent on the bottom of the aluminized tank, with a thickness of about 15-20 mm, then place the parts on the aluminizing agent, and then cover the parts with a layer Aluminizing agent, the thickness is about 15-20mm. Such a layer of aluminizing agent and a layer of parts until the infiltration tank is filled.

[0062] (3) Aluminizing: Put the infiltrating tank into the aluminizing furnace and raise the temperature to 200°C, and vacuumize the furnace to -0.1MPa, then feed nitrogen to raise the pressu...

Embodiment 2

[0065] Perform surface aluminizing treatment on GH4169 superalloy parts according to the following steps:

[0066] (1) Preparation of aluminizing agent: fully stir 10kg of aluminum powder with a particle size of 200 mesh, 1.5kg of ammonium chloride, 1.5kg of aluminum trichloride, 2kg of titanium powder and 85kg of calcined alumina in a mixer for 30 Minutes, get 100 kg of aluminizing agent.

[0067] (2) Canning: Using the powder embedding method, first lay a layer of aluminizing agent on the bottom of the aluminized tank, with a thickness of about 15-20 mm, then place the parts on the aluminizing agent, and then cover the parts with a layer Aluminizing agent, the thickness is about 15-20mm. Such a layer of aluminizing agent and a layer of parts until the infiltration tank is filled.

[0068] (3) Aluminizing: Put the infiltrating tank into the aluminizing furnace and raise the temperature to 200°C, and vacuumize the furnace to -0.1MPa, then feed nitrogen to raise the pressure ...

Embodiment 3

[0071] Perform surface aluminizing treatment on GH4169 superalloy parts according to the following steps:

[0072] (1) Preparation of aluminizing agent: 25kg particle size is 100 mesh aluminum-iron powder, 7.5kg ammonium chloride, 7.5kg aluminum trichloride, 6kg titanium powder and 54kg bauxite are fully stirred in the mixer for 30 minutes to obtain 100 kg of aluminizing agent.

[0073] (2) Canning: Using the powder embedding method, first lay a layer of aluminizing agent on the bottom of the aluminized tank, with a thickness of about 15-20 mm, then place the parts on the aluminizing agent, and then cover the parts with a layer Aluminizing agent, the thickness is about 15-20mm. Such a layer of aluminizing agent and a layer of parts until the infiltration tank is filled.

[0074] (3) Aluminizing: Put the infiltrating tank into the aluminizing furnace and raise the temperature to 200°C, and vacuumize the furnace to -0.1MPa, then feed nitrogen to raise the pressure in the furna...

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Abstract

The invention relates to a reusable low-temperature aluminizing agent and an aluminizing method. The aluminizing agent comprises the following components in percentage by mass: 6-25% of an aluminum supply agent; 1-15% of a penetration enhancer; 1-6% of a brightener; and 54-92% of a dispersant. The aluminizing method comprises the following steps: a) contacting a to-be-treated metal part with the aluminizing agent for aluminizing treatment, and providing the aluminized metal part and the used aluminizing agent. The aluminizing agent has the advantages of simple components, easily available materials, reusability, reduction of the aluminizing cost, low aluminizing temperature, simple preparation process, improvement of the aluminizing efficiency, improvement of the high-temperature oxidation resistance and corrosion resistance of metal parts, improvement of the service temperature of the metal parts, and improvement of the service life of the metal parts.

Description

technical field [0001] The invention belongs to the technical field of material surface protection, and in particular relates to a reusable low-temperature aluminizing agent and an aluminizing method. Background technique [0002] At present, with the development of petrochemical, electric power and aviation industries, there are higher requirements for parts working in high-temperature and highly corrosive environments, and parts need to have better resistance to high-temperature oxidation and corrosion. Otherwise, if the parts are operated under high temperature and highly corrosive conditions for a long time, problems such as scale peeling and corrosion will occur on the surface of the parts, which will eventually lead to material fracture and failure, affecting the long-term safe operation of the mechanical device. [0003] High-temperature parts are generally made of low-alloy steel or martensitic heat-resistant steel, and a small number of important high-temperature pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/48
CPCC23C10/48
Inventor 李生志郁程晶丁丽锋夏楠张长春沈红卫张炼
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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