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Nuclear shielding austenitic stainless steel alloy material and preparation method thereof

A technology for austenitic stainless steel and alloy materials, which is applied in the field of stainless steel alloy materials and their preparation, austenitic stainless steel alloy materials and their preparation, can solve the problems of reduced hot workability of materials, difficulty in preparing boron steel, complicated process, etc., and achieves durability Excellent corrosion and thermal processing formability, improved shielding performance and safety, and simple production process

Active Publication Date: 2021-10-12
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solubility of boron in stainless steel is low, and excessive boron addition will precipitate a large amount of borides (Fe, Cr) at the grain boundaries. 2 B, the hot workability of the material is greatly reduced, and it is extremely difficult to prepare boron steel with higher boron content
B prepared by powder metallurgy method 4 C / Al neutron absorbing material has complex process, B 4 Serious interfacial reaction between C and Al, corrosion resistance, radiation resistance, and aging during use

Method used

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  • Nuclear shielding austenitic stainless steel alloy material and preparation method thereof
  • Nuclear shielding austenitic stainless steel alloy material and preparation method thereof
  • Nuclear shielding austenitic stainless steel alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the present embodiment, a method of preparing a nuclear shield austenitic stainless steel alloy material having excellent thermal processability, including the following steps:

[0024] a. Adopt vacuum induction smelting process, when the feedstock is ingredient, the raw material ingredients are composed of the material ingredients according to the following mass percentage (%):

[0025]

[0026] The total raw material weighing after the ingredients is vacuum inductively smelted to obtain alloy melt;

[0027] b. The alloy melt cast into the step A is molded, and the casting obtained alloy ingot is sequentially forged, hot rolled and annealing heat treatment process, and finally producing a nuclear mask with excellent thermal processability. Stainless steel alloy material bar or sheet.

[0028] In this embodiment, the vacuum induction smelting process is used. After the intradition of micro-nano-stage TiB2 particles are formed, it is placed in a process of poured moldin...

Embodiment 2

[0030] This embodiment is substantially the same as the examples, in particular

[0031] In the present embodiment, a method of preparing a nuclear shield austenitic stainless steel alloy material having excellent thermal processability, including the following steps:

[0032] a. Adopt vacuum induction smelting process, when the feedstock is ingredient, the raw material ingredients are composed of the material ingredients according to the following mass percentage (%):

[0033]

[0034] The total raw material weighing after the ingredients is vacuum inductively smelted to obtain alloy melt;

[0035] b. This step is the same as the embodiment.

[0036] After experimental testing, the test results show that the room temperature tensile strength of the plate material having excellent thermal workability prepared by the present embodiment is greater than 600 MPa, and the fracture elongation is greater than 10.0%. The mechanical and corrosion resistance of the austenitic alloy materi...

Embodiment 3

[0038] This embodiment is substantially the same as the foregoing embodiment, in particular

[0039] In the present embodiment, a method of preparing a nuclear shield austenitic stainless steel alloy material having excellent thermal processability, including the following steps:

[0040] a. Adopt vacuum induction smelting process, when the feedstock is ingredient, the raw material ingredients are composed of the material ingredients according to the following mass percentage (%):

[0041]

[0042] The total raw material weighing after the ingredients is vacuum inductively smelted to obtain alloy melt;

[0043] b. This step is the same as the embodiment.

[0044] After experimental test, the test results show that the room temperature stretching strength of the plate material having excellent thermal workability prepared by the present embodiment is greater than 700 MPa, and the elongation elongation is greater than 6.0%. The mechanical and corrosion resistance of the austenitic...

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Abstract

The invention discloses a nuclear shielding austenitic stainless steel alloy material and a preparation method thereof. The nuclear shielding austenitic stainless steel alloy material has excellent hot workability, and with the increase of the B content, the Ti content increases, and the ratio of the Ti content to the B content The mass ratio satisfies Ti:B=(1.5-2.5):1, and at the same time, in order to make the matrix austenite and not produce high-temperature ferrite, the Ni / Al mass ratio is ≥5.0. In situ formation of micro-nanoscale TiB during batching and vacuum induction melting 2 After the particles are uniformly distributed in the melt, it is poured into shape, and then hot forged, hot rolled and annealed to obtain a nuclear shielding austenitic stainless steel alloy rod or plate with excellent hot workability. The in-situ endogenous synthetic nucleation shielding austenitic stainless steel alloy material of the invention has the advantages of high strength, low cost, excellent corrosion resistance and thermal processing formability, and the like.

Description

Technical field [0001] The present invention relates to a stainless steel alloy material and a method of preparation, and in particular, a austenitic stainless steel alloy material and a preparation method are applied to the technical field of nuclear energy steel alloy materials. Background technique [0002] As an efficient, clean energy, not only has a significant advantage in security, stability, and environmental protection, but also an economical energy, will become a new generation of energy pillars in future energy institutions. While using nuclear energy, the lack of nuclear reactive stack is also accompanied by a strong α, β, gamma radioactivity, accompanied by a neutron emissivity, accompanying the amount of heat. The lack of fuel is removed from the reactor to store a period of time in a lack of fuel pool, so that the short half-life radioactivity is diagrant and takes away from the fade. Usually each million kilowatt nuclear power unit can remove 25 tons of lack of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/50C22C38/54C21D1/26C21D6/00C21D8/02C21D8/06C21D9/00G21F1/08
CPCC21D1/26C21D6/004C21D6/005C21D6/008C21D8/0221C21D8/065C21D9/0075C21D9/0081C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/50C22C38/54G21F1/08
Inventor 肖学山武昭妤黄蓉
Owner SHANGHAI UNIV