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A high-chromium martensitic heat-resistant steel resistant to liquid metal corrosion

A liquid metal and heat-resistant steel technology, applied in the field of heat-resistant metal materials, can solve the problems of low strength, toughness and toughness, low high temperature creep durability, and no mention of it.

Active Publication Date: 2017-08-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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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 oxidation resistance, due to the presence of delta ferrite with a content of ≤5% in its structure, its strength and toughness, especially toughness, are low, and its high-temperature creep durability is also low.
In addition, this patent document does not mention the characteristics of the present invention, namely, obtaining a full martensitic structure, improving toughness and high temperature creep strength

Method used

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  • A high-chromium martensitic heat-resistant steel resistant to liquid metal corrosion
  • A high-chromium martensitic heat-resistant steel resistant to liquid metal corrosion
  • A high-chromium martensitic heat-resistant steel resistant to liquid metal corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The chemical composition of the martensitic heat-resistant steel in this example is: C: 0.18wt.%, Si: 1.10wt.%, Cr: 10.05wt.%, Mn: 0.95wt.%, W: 1.10wt.%, Ta: 0.10wt.%, V: 0.20wt.%, Nb: 0.01wt.%, S: 20 (ppm), P: 40 (ppm), Cu<0.01wt.%, Ti: 40 (ppm), Al : 60 (ppm), Co: 30 (ppm), and the balance is iron.

Embodiment 2

[0036] The chemical composition of the martensitic heat-resistant steel in this example is: C: 0.23wt.%, Si: 1.30wt.%, Cr: 10.30wt.%, Mn: 0.67wt.%, W: 1.22wt.%, Ta: 0.23wt.%, V: 0.20wt.%, Nb: 0.01wt.%, S: 30 (ppm), P: 30 (ppm), Cu<0.01wt.%, Ti: 40 (ppm), Al <50 (ppm), Co: 20 (ppm), the balance is iron.

Embodiment 3

[0038] The chemical composition of the martensitic heat-resistant steel in this example is: C: 0.25wt.%, Si: 1.48wt.%, Cr: 10.10wt.%, Mn: 0.59wt.%, W: 1.30wt.%, Ta: 0.28wt.%, V: 0.10wt.%, Nb: 0.01wt.%, S<30 (ppm), P: 20 (ppm), Cu<0.01wt.%, Ti: 40 (ppm), Al <50 (ppm), Co: 40 (ppm), the balance is iron.

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Abstract

The invention discloses a liquid metal corrosion-resistant high-chromium martensitic heat-resistant steel, which belongs to the field of heat-resistant metal materials. It is characterized in that the weight percentage (wt.%) of the alloy composition is: 0.18%≤C≤0.26%, 1.0%<Si≤1.5%, 10%<Cr≤11.5%, 1.0%<W≤1.5%, 0%< Mn<1.0%, Ta+Nb: ≤0.3%, 0%<V≤0.2%, the balance is iron. The beneficial effect of the present invention is that the liquid metal corrosion resistance is improved by adopting a more reasonable high silicon and high chromium content, and the generation of δ ferrite is suppressed by adjusting the content of carbon, manganese and other elements to obtain a full The martensitic structure improves the strength and toughness, and the microalloying elements such as tantalum, niobium and vanadium are used for composite strengthening to improve the high-temperature creep performance, so that the heat-resistant steel has excellent strength and toughness, high-temperature creep performance and liquid metal corrosion resistance. .

Description

technical field [0001] The invention belongs to the field of heat-resistant metal materials, in particular to a martensitic heat-resistant steel with excellent strength and toughness, excellent high-temperature creep performance and liquid metal corrosion resistance, in particular to a liquid metal corrosion-resistant high-chromium martensitic steel Body heat-resistant steel. Background technique [0002] Liquid metals such as liquid lead and lead-bismuth have excellent properties such as high thermal conductivity, low melting point and high boiling point, and low vapor pressure, and are designed by countries all over the world for advanced nuclear reaction systems such as fast neutron reactors, fusion reactors, and accelerator-driven subcritical systems. The loop or cladding coolant is also designed to be used as a high-energy neutron target for accelerator-driven subcritical systems due to its excellent neutronic properties and radiation damage resistance. In these advanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/26
Inventor 单以银严伟王志光王威杨柯周强国
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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