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Equiaxial high-strength zirconium alloy and preparation method thereof

A zirconium alloy, equiaxed technology, applied in the field of alloys, can solve the problems of narrow application range, low strength, and limited application of zirconium alloys

Pending Publication Date: 2021-10-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current non-nuclear zirconium alloys are mainly Zr702, Zr704 and other grades, which have problems such as relatively low strength and narrow application range, which greatly limits the application of zirconium alloys

Method used

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  • Equiaxial high-strength zirconium alloy and preparation method thereof
  • Equiaxial high-strength zirconium alloy and preparation method thereof
  • Equiaxial high-strength zirconium alloy and preparation method thereof

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preparation example Construction

[0041] The present invention provides a method for preparing an equiaxed high-strength zirconium alloy described in the above scheme, comprising the following steps: melting the alloy raw material to obtain a cast alloy billet; the composition of the alloy raw material is determined according to the composition of the equiaxed high-strength zirconium alloy;

[0042] Rolling and deforming the as-cast alloy billet after heat preservation to obtain a densified alloy billet;

[0043] The densified alloy billet is subjected to solid solution treatment to obtain an equiaxed high-strength zirconium alloy.

[0044] The invention melts the alloy raw material to obtain the cast alloy billet.

[0045] In the present invention, there is no special limitation on the type of the alloy raw material, and the alloy raw material well-known to those skilled in the art is used as the zirconium alloy that can achieve the target composition. In the present invention, the alloy raw materials prefer...

Embodiment 1

[0065] According to the alloy composition Zr-0.5Sn (mass percentage) ingredients, take industrial-grade zirconium sponge (Zr, Hf is not separated), tin wire (purity 99.9%) immersed in absolute ethanol, after ultrasonic cleaning, air-dried, placed in non- In the water-cooled copper crucible for consumable vacuum arc melting, the vacuum in the furnace cavity should be pumped to 8×10 -3 Below Pa. After filling high-purity argon as a protective gas (vacuum degree 0.04-0.05MPa) before arc melting, the arc temperature is 1850°C for each melting, and the time for each melting is 4 minutes to ensure uniform composition. After cooling, the ingot is obtained, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 6 times to ensure that the composition of the finally obtained cast alloy billet is uniform.

[0066] Put the as-cast alloy billet into a vacuum tube furnace (SK-G06143 Tianjin Zhonghuan Experimental Electric Fu...

Embodiment 2

[0071] According to the alloy composition Zr-1Sn (mass percentage), take industrial-grade sponge zirconium (Zr, Hf is not separated), tin wire (99.9%) and immerse in absolute ethanol, after ultrasonic cleaning, air-dry, put into non-consumable In the water-cooled copper crucible for vacuum arc melting, the vacuum in the furnace cavity should be pumped to 8×10 -3 Below Pa. After filling high-purity argon as a protective gas (vacuum degree 0.04-0.05MPa) before arc melting, the arc temperature is 1850°C for each melting, and the time for each melting is 4 minutes to ensure uniform composition. After cooling, the ingot is obtained, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 6 times to ensure that the composition of the finally obtained cast alloy billet is uniform.

[0072] Put the as-cast alloy billet into a vacuum tube furnace (SK-G06143 Tianjin Zhonghuan Experimental Electric Furnace Co., Ltd.) for h...

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Abstract

The invention provides an equiaxial high-strength zirconium alloy and a preparation method thereof, and belongs to the technical field of alloys. The equiaxial high-strength zirconium alloy comprises strengthening elements and the balance Zr; on the basis of the mass of the equiaxial high-strength zirconium alloy, the strengthening elements comprise 0.1%-3% of Sn and 0.5%-4.5% of Hf; and the equiaxial high-strength zirconium alloy is composed of a phase including equiaxial alpha grains. The zirconium alloy contains a certain amount of Sn element, the Sn element can enter a Zr matrix, so that replacement solid solution strengthening is realized; when the content of the Sn element is relatively high, the excessive Sn element can generate Zr4Sn second-phase particles, so that a second-phase strengthening effect is achieved; Hf further has a solid solution strengthening effect; all the elements are matched, so that the zirconium alloy has high strength; and Ti is continuously added on the basis of the strengthening elements, Ti and Zr can form an infinite solid solution, and the strength of the zirconium alloy can be further improved.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an equiaxed high-strength zirconium alloy and a preparation method thereof. Background technique [0002] Zirconium has a small thermal neutron absorption cross-sectional area and has excellent corrosion resistance in high-temperature and high-pressure water vapor. Therefore, zirconium alloys are widely used in the nuclear industry as cladding materials and structural materials. At the same time, zirconium and its alloys are also used in the chemical industry due to their excellent corrosion resistance in most acids, alkalis and molten salts. However, the current non-nuclear zirconium alloys are mainly Zr702, Zr704 and other grades, which have problems such as relatively low strength and narrow application range, which greatly limit the application of zirconium alloys. Contents of the invention [0003] The object of the present invention is to provide an equiaxed high-strength...

Claims

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Application Information

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IPC IPC(8): C22C16/00C22C1/03C22F1/18C21D8/02
CPCC22C16/00C22C1/03C22F1/186C21D8/0247C21D8/0226
Inventor 刘日平马巍陈博涵姬鹏飞郭宇星张新宇马明臻
Owner YANSHAN UNIV
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