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

A technology of liquid metal and heat-resistant steel, applied in metal material coating technology, ion implantation plating, coating, etc., can solve problems that restrict the sustainable development of nuclear power, achieve good radiation compatibility, ensure stability and Integrity, high matching effect

Inactive Publication Date: 2019-04-23
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

Nuclear power is an ideal choice to meet these challenges, but the problem of nuclear waste disposal has always restricted the sustainable development of nuclear power
However, the harsh working environment of ADS (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 more severe The corrosive environment requires further improvement of the corrosion resistance of structural materials

Method used

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

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Embodiment 1

[0023] In this embodiment, the method for improving the corrosion resistance of martensitic heat-resistant steel in the present invention is as follows:

[0024] (1) Pretreatment of the surface of the martensitic heat-resistant steel: grind the martensitic heat-resistant steel sample with a size of 15mm×10mm×2mm to No. 2000 step by step with metallographic sandpaper, and round all the edges and corners Corners, polished, ultrasonically cleaned in deionized water after cleaning with acetone and alcohol, and dried;

[0025] (2) During ion plating, the vacuum chamber is evacuated to the ultimate vacuum degree of 3×10 -3 Pa, then pass through the protective gas argon, load the negative bias voltage -800V, and perform glow cleaning for 10 minutes;

[0026] (3) The TiN coating is preset by arc ion plating, and the purity of the titanium target is above 99.9wt%. Coating parameters: Nitrogen partial pressure 4×10 -1 Pa, martensitic heat-resistant steel Apply negative bias -350V, tit...

Embodiment 2

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

[0031] The chemical composition of 9-12% Cr martensitic heat-resistant steel is: C: 0.19wt.%, Si: 1.05wt.%, Cr: 10.05wt.%, Mn: 1.0wt.%, W: 1.19wt.%. , Ta: 0.1wt.%, V: 0.2wt.%, Nb: 0.01wt.%, and the balance is iron. Other surface treatment processes of the martensitic heat-resistant steel are the same as in Example 1.

Embodiment 3

[0033] In this embodiment, the method for improving the corrosion resistance of martensitic heat-resistant steel in the present invention is as follows:

[0034] The chemical composition of 9-12% Cr martensitic heat-resistant steel is: C: 0.15wt.%, Si: 1.23wt.%, Cr: 10.46wt.%, Mn: 0.41wt.%, W: 1.5wt.%. , Ta: 0.15wt.%, V: 0.19wt.%, Nb: 0.014wt.%, and the balance is iron. The surface treatment process of the martensitic heat-resistant steel 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 of preparing a TiN coating on the surface of 9-12 wt% Cr martensite heat-resistant steel soas to improve the liquid metal corrosion resistance of metal, a titanium nitride coating is pre-arranged on the surface of the 9-12% Cr martensitic heat-resistant steel by adopting arc ion plating. Byadopting the method to carry out treatment on the surface of the 9-12% Cr martensitic heat-resistant steel, so that the liquid metal corrosion resistance of the metal can be effectively improved, andthe service life of the 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 TiN coating on the surface of 9-12wt% Cr martensitic heat-resistant steel to improve the metal's resistance to liquid metal corrosion. Background technique [0002] With the intensification of the energy crisis and the increasing global temperature effect, it is imminent to develop new energy sources that are safe, high energy density, and environmentally friendly. Nuclear power is an ideal choice to meet these challenges, but the problem of nuclear waste disposal has always restricted the sustainable development of nuclear power. ADS transmutation system (Accelerator Driven sub-critical System) is currently the most promising nuclear waste transmutation system because of its efficient use of nuclear waste and high system security. Liquid lead and liquid lead-bismuth eutectic alloy have become the materials of choice for spallati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26
CPCC22C38/02C22C38/04C22C38/22C22C38/24C22C38/26C23C14/0641C23C14/325
Inventor 石全强严伟单以银李艳芬王威杨振国
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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