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Liquid metal corrosion-resistant high-chromium martensite heatproof steel

A technology of liquid metal and heat-resistant steel, applied in the field of heat-resistant metal materials, can solve the problems of low toughness, toughness, high-temperature creep and low durability, which have not been mentioned

Active Publication Date: 2015-05-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Liquid metal corrosion-resistant high-chromium martensite heatproof steel
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  • Liquid metal corrosion-resistant high-chromium martensite heatproof steel

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 martensite heatproof steel, and belongs to the field of heatproof metal materials. The steel comprises 0.18-0.26wt% of C, 1.0-1.5wt% (not including 1.0%) of Si, 10-11.5wt% (not including 10%) of Cr, 1.0-1.5wt% (not including 1.0%) of W, 0-1.0wt% (not including 0 or 1.0%) of Mn, 0.3wt% or less of Ta + Tb, 0-0.2wt% ((not including 0%) of V, and the balance of Fe. The reasonable high silicon and high chromium content is adopted to improve the liquid metal corrosion resistance, C, Mn and other elements are greatly adjusted to inhibit the generation of delta ferrite in order to improve the strength and toughness of a fully martensitic structure, and tantalum, niobium, vanadium and other micro alloying elements are adopted to carry out composite reinforcement in order to improve the high temperature creep resistance, so the heatproof steel has excellent strength and toughness, high temperature creep resistance 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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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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