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A low-activation martensitic heat-resistant steel with oxidation resistance and liquid lead bismuth corrosion resistance

A martensitic steel and liquid lead technology is applied in the field of low-activation martensitic steel with anti-oxidation and anti-corrosion of liquid lead and bismuth, which can solve the problem of not considering the corrosion resistance of liquid lead and bismuth, so as to improve the corrosion resistance of liquid metal, The effect of improving high temperature characteristics and improving strength and toughness

Active Publication Date: 2016-04-27
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

Although this martensitic structure material has good anti-neutron radiation performance, it does not consider the anti-corrosion performance of liquid lead and bismuth.
In addition, this patent document does not mention adding 0.4-0.8% Si to martensitic steel to improve its corrosion resistance to liquid lead and bismuth

Method used

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  • A low-activation martensitic heat-resistant steel with oxidation resistance and liquid lead bismuth corrosion resistance
  • A low-activation martensitic heat-resistant steel with oxidation resistance and liquid lead bismuth corrosion resistance
  • A low-activation martensitic heat-resistant steel with oxidation resistance and liquid lead bismuth corrosion resistance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The chemical composition of martensitic steel is: C: 0.090wt.%, Cr: 8.95wt.%, W: 1.50wt.%, V: 0.20wt.%, Ta: 0.14wt.%, Mn: 0.50wt.%. , Si: 0.59wt.%, Al<0.005wt.%, N: 50 (ppm), Ni: 40 (ppm), Mo: 40 (ppm), Nb: 43 (ppm), Co: 40 (ppm), Ti: 33 (ppm), Cu<0.01wt.%, O: 42 (ppm), P: 48 (ppm), S: 26 (ppm), and the balance is iron.

[0019] The final heat treatment system of the martensitic steel is: normalizing 950-1100°C / 30min / air cooling+tempering 760-800°C / 100min / air cooling.

Embodiment 2

[0021] The chemical composition of martensitic steel is: C: 0.095wt.%, Cr: 8.96wt.%, W: 1.51wt.%, V: 0.21wt.%, Ta: 0.14wt.%, Mn: 0.49wt.%. , Si: 0.60wt.%, Al<0.005wt.%, N: 50 (ppm), Ni: 40 (ppm), Mo: 40 (ppm), Nb: 43 (ppm), Co: 48 (ppm), Ti: 33 (ppm), Cu<0.010wt.%, O: 42 (ppm), P: 48 (ppm), S: 26 (ppm), and the balance is iron.

[0022] The final heat treatment system of the martensitic steel is: normalizing 950-1100°C / 30min / air cooling+tempering 760-800°C / 100min / air cooling.

Embodiment 3

[0024] The chemical composition of martensitic steel is: C: 0.093wt.%, Cr: 9.04wt.%, W: 1.48wt.%, V: 0.18wt.%, Ta: 0.12wt.%, Mn: 0.48wt.%. , Si: 0.53wt.%, Al<0.010wt.%, N: 36 (ppm), Ni: 42 (ppm), Mo: 44 (ppm), Nb: 40 (ppm), Co: 40 (ppm), Ti: 27 (ppm), Cu<0.010wt.%, O: 42 (ppm), P: 40 (ppm), S: 36 (ppm), and the balance is iron.

[0025] The final heat treatment system of the martensitic steel is: normalizing 950-1100°C / 30min / air cooling+tempering 760-800°C / 100min / air cooling.

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Abstract

The invention aims to provide a low-activation martensitic heat-resistant steel with oxidation resistance and liquid lead-bismuth corrosion resistance. The heat-resistant steel comprises the following alloy elements in percentage by mass: C not less than 0.09% and not more than 0.12%, Cr not less than 8.8% and not more than 9.2%, W not less than 1.48% and not more than 1.54%, V not less than 0.17% and not more than 0.23%, Ta not less than 0.12% and not more than 0.16%, Mn not less than 0.48% and not more than 0.50%, Si not less than 0.40% and not more than 0.80%, N less than 0.010%, Al less than 0.010%, Ni less than 0.005%, Mo less than 0.005%, Nb less than 0.010%, Co less than 0.005%, Ti less than 0.010%, Cu less than 0.010%, O less than 0.005%, P less than 0.005%, S less than 0.005%, and a matrix being Fe. The heat-resistant steel has excellent mechanical performance, high-temperature characteristic, oxidation resistance and liquid metal corrosion resistance.

Description

technical field [0001] The invention belongs to the field of heat-resistant and radiation-resistant metal materials, in particular to an oxidation-resistant liquid lead-bismuth corrosion-resistant (LBE) low-activation martensitic steel suitable for fusion reactors, which can resist strong neutron irradiation and high-temperature oxidation. And resistant to liquid lead-bismuth eutectic corrosion. Background technique [0002] With the intensification of the energy crisis, the development of safe and high-energy-density green new energy has become the main direction of human energy development. Nuclear energy (nuclear fusion energy and nuclear fission energy) is the most promising clean energy. Compared to nuclear fission power, nuclear fusion power plants will produce no carbon, and produce fewer radioactive by-products than current nuclear fission power plants, and the storage method is simpler. Due to the combined effect of high temperature, stress, neutron irradiation an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/52C22C38/50C22C38/48C22C38/30C22C38/28C22C38/26C21D1/28
Inventor 单以银严伟王志光杨柯胡雪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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