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: 2014-09-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
5 Cites 13 Cited by

AI-Extracted Technical Summary

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 ...
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Method used

Result shows, the present invention controls Cr equivalent by adjusting element content such as C, Mn, Si, thereby suppresses delta ferrite generation, finally obtains single full martensitic structure, improves toughness; Add elements such as Ta, V Realize low activation characteristic; And adopt Ta, V micro-alloying tr...
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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.

Technology Topic

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

Examples

  • Experimental program(3)
  • Comparison scheme(4)

Example Embodiment

[0017] Example 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), 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.

Example Embodiment

[0020] Example 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), 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.

Example Embodiment

[0023] Example 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), 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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