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Method for improving liquid metal corrosion resistance of martensite heat-resistant steel

A technology of liquid metal and heat-resistant steel, applied in metal material coating process, gaseous chemical plating, coating, etc., to achieve the effect of preventing oxidation and corrosion, ensuring stability and integrity, and high matching

Inactive Publication Date: 2020-02-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the harsh working environment of ADS (such as: high temperature, radiation, liquid metal corrosion) poses new challenges to 9-12% Cr martensitic heat-resistant steel structural materials, and with the increase of equipment service temperature and the More harsh corrosive environments require further improvement of the corrosion resistance of structural materials

Method used

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  • Method for improving liquid metal corrosion resistance of martensite heat-resistant steel
  • Method for improving liquid metal corrosion resistance of martensite heat-resistant steel
  • Method for improving liquid metal corrosion resistance of martensite heat-resistant steel

Examples

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Embodiment 1

[0030] In this embodiment, the method for improving the liquid metal corrosion resistance of martensitic heat-resistant steel is as follows:

[0031] (1) Pretreatment of the metal surface: the metal sample with a diameter of 25mm and a thickness of 3mm is polished step by step to No. 2000 with metallographic sandpaper, and all edges and corners are rounded, polished, and ultrasonicated by alcohol and acetone Wash and tumble dry.

[0032] (2) The vacuum degree of the vacuum chamber of the double-hui plasma plating equipment is 5×10 -4 Pa, the mixed gas of high-purity hydrogen with a volume purity of 99.99% and tetramethylsilane with a volume purity of 99.99% is used as the reaction gas, and argon with a volume purity of 99.99% is introduced as the reaction gas as a protective gas to realize plasma excitation.

[0033] (3) Process conditions for preparing silicon carbide coatings on the surface of double-hui plasma: the flow rate of hydrogen is 15ml / min, and its partial pressur...

Embodiment 2

[0037]In this example, the chemical composition of the martensitic heat-resistant steel is: C: 0.08wt.%, Si: 0.05wt.%, Cr: 8.5wt.%, Mn: 0.45wt.%, W: 1.8wt.%. , Ta: 0.1wt.%, V: 0.1wt.%, Nb: 0.05wt.%, and the balance is iron. Other surface treatment processes of the metal are the same as in Example 1.

Embodiment 3

[0039] In this example, the chemical composition of the martensitic heat-resistant steel is: C: 0.32wt.%, Si: 0.5wt.%, Cr: 12.46wt.%, Mn: 1.41wt.%, W: 2.5wt.%. , Ta: 0.26wt.%, V: 0.35wt.%, Nb: 0.02wt.%, and the balance is iron. The metal surface treatment process is the same as in Example 1.

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Abstract

The invention belongs to the technical field of metal surface treatment and particularly provides a method for improving the liquid metal corrosion resistance of a metallic matrix by preparing a silicon carbide coating on the surface of martensite heat-resistant steel. The silicon carbide coating is preformed on the surface of the martensite heat-resistant steel through a double-glow plasma surface treatment method. The surface of the martensite heat-resistant steel is subjected to treatment through the method. The liquid metal corrosion resistance of metal can be effectively improved. The service life of a metal material is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and particularly provides a method for preparing a silicon carbide coating on the surface of a martensitic heat-resistant steel to improve the corrosion resistance of a metal matrix by liquid metal. Background technique [0002] The safe and efficient development of nuclear power is a strategic choice for optimizing my country's energy structure and vigorously developing the nuclear industry, and is one of my country's medium and long-term energy development strategies. Among them, the accelerator-driven subcritical nuclear energy system (Accelerate Driven Sub-critical system, ADS) is currently the most promising nuclear waste transmutation system because of its efficient use of nuclear waste and high system security. As one of the main reactor types of the fourth-generation nuclear energy system, the ADS system is a lead-cooled fast reactor with liquid lead or liquid lead bismuth...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/34C22C38/22C22C38/04C22C38/38C22C38/24C22C38/26C23C16/32C23C16/50
CPCC22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C22C38/34C22C38/38C23C16/325C23C16/50
Inventor 石全强严伟张玲玲李艳芬单以银
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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