Manufacture method of nuclear grade zirconium-niobium alloy cast ingot

A zirconium-niobium alloy and ingot casting technology is applied in the field of preparation of nuclear grade zirconium-niobium alloy ingots, and can solve the problems of uneven composition of zirconium-niobium alloy ingots, niobium inclusions, etc.

Active Publication Date: 2010-05-05
国核宝钛锆业股份公司 +1
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  • Abstract
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Problems solved by technology

[0007] The invention provides a method for preparing a nuclear-grade zirconium-niobium alloy ingot with high quality stability, which can improve the phenomenon of uneven components and niobium inclusions in the zircon

Method used

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Embodiment Construction

[0031] Taking the preparation of the zirconium-1 niobium alloy ingot of Φ350mm * 800mm as an example below, the specific embodiment of the present invention is described in further detail, wherein step 1) to step 5) belong to the stage of preparing zirconium niobium master alloy chips; wherein step 6 ) to step 11) belong to the stage of preparing nuclear-grade zirconium-niobium alloy ingot, and the specific implementation steps of the specific embodiment are as follows:

[0032] 1) To press the electrode block, first process a certain amount of Φ110mm pure niobium bar into niobium fines with a white steel knife, then mix 1 part of niobium fines with 3.3 parts of sponge zirconium, and press it into 150mm×100mm× 300mm electrode block, the pressed electrode block is placed in a vacuum welding box, and three electrode blocks can be welded into a rectangular consumable electrode with a size of 150mm×100mm×900mm by argon arc welding;

[0033] 2) For one smelting, a 200kg vacuum arc ...

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Abstract

The invention relates to the field of a manufacture method of a nuclear grade zirconium-niobium alloy cast ingot, adopting the following technical scheme: firstly, forming a pure niobium bar and sponge zirconium into zirconium-niobium master alloy scraps by the steps of pressing an electrode block, firstly smelting, secondly smelting and thirdly smelting, and the like; using the zirconium-niobium master alloy scraps and the sponge zirconium to form the zirconium-niobium alloy cast ingot by the steps of materials mixing, materials distributing, electrodes manufacturing and vacuum self-consumable electric arc smelting; and detecting that the zirconium-niobium alloy cast ingot has no defects such as components segregation and niobium impurity, and the like, to complete the manufacture of the nuclear grade zirconium-niobium alloy cast ingot. The nuclear grade zirconium-niobium alloy cast ingot has even components, has no metallurgical defects such as niobium impurity, and the like, has high raw materials yield, saves the production cost to a certain degree, and voids the waste.

Description

technical field [0001] The invention relates to the field of a method for preparing a nuclear-grade zirconium-niobium alloy ingot. Background technique [0002] Nuclear-grade zirconium-niobium alloy ingots are mainly used in the manufacture of zirconium materials for advanced nuclear reactors. At present, the grades of zirconium materials used in my country's Daya Bay Nuclear Power Station are M5 and the grades of zirconium materials used in Tianwan Nuclear Power Station are E110. Both belong to the category of zirconium-niobium alloys. Among them, the addition of niobium components is to improve the corrosion performance of the final zirconium material, but the niobium components have a high melting point (2468°C) and a high density (8.40g / cm 3 ), if niobium scraps / strips are added when preparing ingots, because the overall niobium content is not high, the uniformity of its composition is not easy to control. May fall into the molten pool in the solid state, forming niobiu...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C16/00
Inventor 袁改焕张延生李小宁任春燕成亚辉张笃怀刘春光王练于海慧
Owner 国核宝钛锆业股份公司
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