Low activation steel and making method thereof

A low-activation steel and steel ingot technology, applied in the field of materials, can solve the problems of high temperature mechanical properties deterioration, material failure and other problems, and achieve the effect of improving mechanical properties and radiation resistance.

Active Publication Date: 2013-11-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During long-term service at high temperature M 23 C 6 The aggregation and coarsening of carbides and the degradation of the structure lead to a sharp deterioration of the high-temperature mechanical properties, resulting in material failure

Method used

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  • Low activation steel and making method thereof
  • Low activation steel and making method thereof
  • Low activation steel and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 (Influence of Composition Design on Performance)

[0043] Preparation:

[0044] Qualified low-activation steel was prepared by adopting the composition of the present invention, and its composition is: C: 0.085% by weight; N: 0.028% by weight; Ta: 0.035% by weight; Mn: 0.51% by weight; W: 1.51% by weight; Cr: 9.12% by weight; V: 0.24% by weight; total amount of P and S: ≤0.010% by weight; the rest is Fe. After casting, forging and rolling the raw materials of the above ingredients into 16 mm steel plates (the effective thickness is 16), the following heat treatment process is adopted: at 1000 ° C for 45 minutes, and then moved to another temperature of 855 ° C ~ 860 ° C ℃ furnace for 30 minutes, air-cooled to room temperature; then heated to 750 ℃ ​​~ 755 ℃ tempering 75 minutes, air-cooled to room temperature.

[0045] Evaluation indicators:

[0046] The microstructure and morphology diagram of the steel alloy prepared by the above-mentioned embodiment meth...

Embodiment 2

[0055] Example 2 (Influence of thermal insulation heat treatment on high temperature mechanical properties)

[0056] Sample 1: low activation steel prepared in Example 1

[0057] Sample 2: raw materials: C: 0.085% by weight; N: 0.028% by weight; Ta: 0.035% by weight; Mn: 0.51% by weight; W: 1.51% by weight; Cr: 9.12% by weight; And the total amount of S: ≤0.010% by weight; the rest is Fe. After casting, forging and rolling the raw materials of the above ingredients into 16 mm steel plates (the effective thickness is 16), the following heat treatment process is adopted: at 1000 ° C for 45 minutes, then air cooled to room temperature; then heated to 750 ° C ~ Temper at 755°C for 75 minutes, then air cool to room temperature. Finally, sample 2 was prepared.

[0058] Determination of high temperature creep mechanical properties:

[0059] Experimental conditions: 550°C, 270MPa. The specific experimental method is carried out according to GB / T2039-2012.

[0060] The measuremen...

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Abstract

The invention provides low activation steel and a making method thereof. The low activation steel includes 0.08-0.12wt% of C, 0.01-0.04wt% of N, 0.30-0.60wt% of Ta, 0.50-0.70wt% of Mn, 1.40-1.60wt% of W, 9.0-9.5wt% of Cr, 0.15-0.35wt% of V, and the balance Fe. The low activation steel has good mechanical performances and a good anti-irradiation performance.

Description

technical field [0001] The present invention relates to the field of materials. In particular, the present invention relates to low activation steels and methods for their preparation. Background technique [0002] Fusion energy is an important way to solve future human energy problems. The problem of fusion structural materials is one of the key issues restricting the realization of fusion energy. Fusion reactor cladding service environment is extremely harsh, facing harsh service conditions such as high temperature, high heat flux, high-energy neutron irradiation, complex mechanical loads, and high-temperature oxidation and corrosion. As a structural component under irradiation conditions, low-activation ferritic steel has good geometric and dimensional stability, low radiation swelling rate and thermal expansion coefficient, and excellent thermal conductivity and mechanical properties. An important structural material for power reactors. [0003] Stable tempered marte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/26C21D8/00
Inventor 张弛柳文波夏志新杨志刚
Owner TSINGHUA UNIV
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