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A method for adding alloy elements to zirconium alloy ingots

A technology of alloying elements and zirconium alloys, which is applied in the field of adding alloy elements to zirconium alloy ingots, can solve the problems of heavy weighing workload and data recording, inability to guarantee tin uniformity, and sticking tungsten poles on the surface of alloy buckles, etc., and achieve good results. The effect of extending package performance, avoiding quality risks, and improving production efficiency

Active Publication Date: 2022-03-22
西安西部新锆科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the uniformity of the composition of a single alloy buckle, the weight of a single alloy buckle is small, about 40g, resulting in a large number of alloy buckles that need to be prepared for conventional 3t grade zirconium alloy ingots, more than 1000, each alloy buckle Buckles contain all kinds of intermediate alloy elements required for ingot casting, manual weighing needs about 5000 times, and the workload of weighing and data recording is relatively large
At the same time, the smelting process of the intermediate alloy buckle is realized by tungsten argon arc welding torch, which has a high labor intensity and the risk of tungsten sticking on the surface of the alloy buckle
Therefore, there are disadvantages such as heavy weighing workload, large amount of data recording, high labor intensity, long production cycle, low efficiency, and high quality risk in the entire alloy buckle preparation process, which increases production costs and is not conducive to large-scale industrial production.
At the same time, when the pure metal is directly wrapped with tin for cloth, the preheating temperature reached by the front end of the electrode far exceeds the melting point of tin, causing tin to flow into the molten pool prematurely, which may easily cause tin segregation and other disadvantages
Uniformity of tin throughout the ingot cannot be guaranteed

Method used

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  • A method for adding alloy elements to zirconium alloy ingots
  • A method for adding alloy elements to zirconium alloy ingots
  • A method for adding alloy elements to zirconium alloy ingots

Examples

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Embodiment 1

[0025] This embodiment includes the following steps:

[0026] Step 1, material preparation: prepare 15kg tin particles, 1.3kg iron filings, 1.3kg Chromium particles, 0.6kg nickel foil, 3.5kg zirconium foil and 1056kg nuclear grade zirconium sponge;

[0027] Step 2. Preparation of the intermediate alloy package: select and weigh the tin particles, iron filings, chromium particles and nickel foil prepared in step 1, then pour them into zirconium foil and wrap them into bags to ensure that the internal materials will not be exposed, and prepare the intermediate alloy package. Alloy ladle; the mass of a single intermediate alloy ladle is 221g, and the total number of intermediate alloy ladles is 98;

[0028] Step 3. Cloth: Lay the bottom layer of nuclear-grade zirconium sponge on the bottom of the electrode block mold, then place the 7 intermediate alloy bags prepared in step 2 at equal intervals on the bottom layer of nuclear-grade zirconium sponge, and then lay the top layer of...

Embodiment 2

[0032] This embodiment includes the following steps:

[0033] Step 1, material preparation: prepare 41.6kg tin particles, 5.6kg iron filings, and 3.9kg chromium particles according to the composition and content of each component in the target product Zr-4 (Zr-1.5Sn-0.2Fe-0.1Cr) zirconium alloy ingot , 6.9kg of zirconia powder, 7.0kg of zirconium foil and 3015kg of nuclear-grade zirconium sponge;

[0034] Step 2. Preparation of the intermediate alloy bag: select and weigh the tin particles, iron filings, chromium particles and zirconia powder prepared in step 1, then pour them into zirconium foil and wrap them into bags to ensure that the internal materials will not be exposed. Prepare Obtain an intermediate alloy bag; the quality of a single said intermediate alloy bag is 324g, and the quantity of the intermediate alloy bag is 200 in total;

[0035] Step 3. Cloth: Lay the bottom layer of nuclear-grade zirconium sponge on the bottom of the electrode block mold, then place the...

Embodiment 3

[0039] This embodiment includes the following steps:

[0040] Step 1, material preparation: Prepare 9kg tin foil, 3kg iron filings, 2.1kg zirconium dioxide powder, 27kg zirconium-niobium alloy scraps according to the composition and content of each component in the target product Zr-1.0Sn-1.0Nb-0.3Fe zirconium alloy ingot , 1.9kg zirconium foil and 1035kg nuclear-grade zirconium sponge;

[0041] Step 2. Preparation of the intermediate alloy bag: select and weigh the iron filings and tin foil prepared in step 1, then pour the iron filings into the tin foil and wrap them into a bag with zirconium foil, and ensure that the internal materials will not be exposed. The prepared Intermediate alloy ladle; the mass of a single intermediate alloy ladle is 248g, and the total number of intermediate alloy ladles is 56;

[0042] Step 3. Cloth: Lay the bottom layer of nuclear-grade zirconium sponge on the bottom of the electrode block mold, then place the 4 intermediate alloy bags prepared...

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Abstract

The invention discloses a method for adding alloy elements to zirconium alloy ingots. The method comprises: 1. preparing zirconium raw materials and raw materials of alloy elements; Intermediate alloy package; 3. Place multiple intermediate alloy packages between two layers of zirconium sponge to obtain an electrode block; 4. Weld multiple electrode blocks to obtain a consumable electrode; 5. Consumable electrode for vacuum self-consumption Zirconium alloy ingots are obtained by arc melting. The present invention adopts zirconium foil to wrap the raw material of alloy elements to make the intermediate alloy bag, and utilizes the high melting point of the zirconium foil at the front end of the electrode during the smelting process, which is not easy to melt prematurely and flow into the molten pool, thereby ensuring the distribution uniformity of each element in the zirconium alloy ingot At the same time, the alloy raw materials do not need to be alloyed in advance, omitting the alloy ladle pressing and alloy buckle smelting process, shortening the process flow, avoiding the tungsten electrode pollution caused by alloy buckle smelting, reducing labor intensity, and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of zirconium alloy ingots, and in particular relates to a method for adding alloy elements to zirconium alloy ingots. Background technique [0002] Zirconium alloys are key structural materials for nuclear reactor cores. A variety of zirconium alloys have been developed at home and abroad for different nuclear reactor conditions, such as ZIRLO alloys, Zr-4 alloys, and Zr-2 alloys. There are many types of alloying elements in various types of zirconium alloys and their contents vary greatly. The alloying elements contained include Sn, Fe, Cr, Nb, Ni, etc. The alloy composition in the ingot is mainly regulated by the addition of the above-mentioned intermediate alloying elements. At present, the most widely used method of adding master alloy is to add it in the form of nearly alloyed master alloy buckle. The preparation process of the master alloy buckle is relatively long, and it needs to be p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C16/00C22B9/20
CPCC22C1/03C22C16/00C22B9/20
Inventor 田锋袁波周军严宝辉石明华周宣谢梦王瑶王文生李天明
Owner 西安西部新锆科技股份有限公司