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UNS N10003 alloy surface carburizing method

A surface carburizing and alloying technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem of not providing carburizing process parameters HastelloyN alloy structure and mechanical properties data and other problems

Pending Publication Date: 2021-09-10
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is a pity that it only describes the heat treatment of Hastelloy N alloy wrapped in carbon bricks, and does not provide specific carburizing process parameters and the structure and mechanical properties of Hastelloy N alloy itself after carburizing. Since the MSRE project finally adopted the cantilever pump as The final design proposal, so the study of carburized Hastelloy N alloy was suspended

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  • UNS N10003 alloy surface carburizing method
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Embodiment Construction

[0031] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0032] Explanation of some concepts:

[0033] Carbon potential: carbon potential, carbon potential is the same as water potential and electric potential, the potential difference determines the trend of material flow, and the carbon potential difference determines the direction of carbon diffusion. When freely diffusing, carbon always moves from a place with a high carbon potential to a carbon potential Diffusion in low places.

[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manner of the present application will be furthe...

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Abstract

The invention relates to a surface treatment technology, and discloses a UNS N10003 alloy surface carburizing method. The method comprises the following steps that a UNS N10003 alloy is put into a gas carburizing furnace; and the temperature of the furnace is increased to 910-980 DEG C, then heat preservation is conducted for 2-72 h, in the heat preservation period, carbon-containing gas is introduced, the carbon potential is adjusted to range from 0.6% to 0.9%, and carburizing treatment is conducted. According to the embodiment manner of the invention, the surface hardness of the UNS N10003 alloy can be effectively improved, so that the frictional wear resistance of the UNS N10003 alloy is improved.

Description

technical field [0001] This application relates to surface treatment technology, in particular to UNS N10003 alloy surface carburizing technology. Background technique [0002] The working temperature of molten salt (fluorine salt or chloride salt) can be above 700°C. It is an excellent heat transfer and heat storage medium, which can greatly improve the working efficiency of high-temperature energy equipment, such as solar heat collection or molten salt reactor. In the 1960s, Oak Ridge National Laboratory developed the Hastelloy N (UNS N10003) alloy to meet the needs of molten salt reactors. The alloy has high strength, good plasticity and toughness, and good machinability. It has better tolerance to neutron radiation, its high-temperature strength is better than that of iron-based alloys, and it has excellent corrosion resistance in high-temperature molten salt. It has been successfully Applied to reactor vessels, loop piping, heat exchangers and other parts. [0003] Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/20C22C19/05
CPCC23C8/20C22C19/057
Inventor 叶祥熙蒋力梁建平李志军任森
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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