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Liquid-Pb/Bi-corrosion-resistant high-strength Fe-Cr-Zr-W-Mo-B ferrite alloy and preparing method thereof

A ferrite, high-strength technology, which is applied in the field of heat-resistant alloy materials, can solve the problems of high-temperature strength decline and other problems, and achieve the effect of refining grain size, good thermal stability, and ensuring stability

Inactive Publication Date: 2020-08-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the strength of ferrite / martensitic steel decreases at high temperatures above 550°C, the purpose of the present invention is to develop a Fe-Zr type intermetallic Compound-strengthened Fe-Cr-Zr-W-Mo-B alloy improves the high temperature strength of the alloy while ensuring the corrosion resistance of liquid lead and bismuth

Method used

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  • Liquid-Pb/Bi-corrosion-resistant high-strength Fe-Cr-Zr-W-Mo-B ferrite alloy and preparing method thereof
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  • Liquid-Pb/Bi-corrosion-resistant high-strength Fe-Cr-Zr-W-Mo-B ferrite alloy and preparing method thereof

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Embodiment 1

[0031] This embodiment provides a high-strength Fe-Cr-Zr-W-Mo-B ferritic alloy resistant to corrosion by liquid lead and bismuth. The chemical composition of the alloy is (wt.%): C:0.004%, Cr:9.6%, W: 1.8%, Mo: 1.0%, Zr: 9.4%, B: 40ppm, and the balance is Fe.

[0032] The specific production process steps of the alloy are as follows:

[0033] 1) Melting: Weigh the raw materials according to the alloy composition ratio, put the prepared raw materials into the crucible of the vacuum induction melting furnace, melt them in the vacuum induction furnace, and cast them into ingots. After the ingots are completely solidified, open the mold and take them out ;

[0034] 2) Forging: Heat the ingot to 1150°C, keep it warm for 1 hour, place it quickly on a hammer forging machine to forge into a slab, then air cool to room temperature, and the final forging temperature is above 900°C.

[0035] 3) Rolling: heat the forged plate to 1150°C, keep it warm for 1 hour, roll it into a plate in a...

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Abstract

The invention discloses a liquid-Pb / Bi-corrosion-resistant high-strength Fe-Cr-Zr-W-Mo-B ferrite alloy and a preparing method thereof, and belongs to the technical field of heat-resistant alloy materials. Chemical components of the alloy include: smaller than or equal to 0.01% of C, 8.0-12.0% of Cr, 0-2.0% of Mo, 0-2.0% of W, 5.0-10.0% of Zr, 10-50 ppm of B and the balance Fe. On the basis of Fe-(9-12 wt%)Cr, Zr is added, so that an Fe-Zr intermetallic phase is separated out of a base body, and the high-temperature strength of the material is improved due to the diffusion reinforcing effect ofthe Fe-Zr intermetallic phase; and B is added, so that a grain size of the ferrite base body can be reduced to 1 [mu]m or below, and the liquid-Pb / Bi-corrosion-resistant performance of the alloy is improved due to the reduced grain size. The Fe-Cr-Zr-W-Mo-B ferrite alloy meets the requirements for high-temperature-resistant performance, Pb / Bi-corrosion-resistant performance and anti-radiation performance.

Description

Technical field: [0001] The invention relates to the technical field of heat-resistant alloy materials, in particular to a high-strength Fe-Cr-Zr-W-Mo-B ferrite alloy resistant to corrosion by liquid lead and bismuth and a preparation method thereof. Background technique: [0002] As a low-carbon energy source, nuclear power is an important foundation for sustainable energy development in the future. With the large-scale development of nuclear power in my country, the amount of spent fuel is also increasing. In order to ensure the safe and sustainable development of nuclear power, developed nuclear technology countries in the world are actively developing advanced nuclear energy systems, including fourth-generation fast reactors and their closed fuel cycle technology, and more advanced ADS (Accelerator Driven Subcritical System) fuel Recycling technology to improve the utilization of uranium resources in spent fuel and reduce long-lived radioactive waste. Lead-bismuth eute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/28C22C38/22C21D8/02
CPCC21D8/0205C21D8/0247C21D2211/005C22C38/22C22C38/28C22C38/32
Inventor 陈胜虎戎利建姜海昌闫德胜赵明久王本贤胡小峰宋元元张杨鹏
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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