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Preparation method of R60705 zirconium alloy cast ingot

A zirconium alloy and ingot casting technology, which is applied in the field of R60705 zirconium alloy ingot preparation, can solve the problems of poor electrode density and strength, high hardness of sponge zirconium particles, and large addition of niobium and zirconium scraps, etc., to achieve short process flow , Improve production efficiency and avoid metallurgical defects

Active Publication Date: 2022-06-28
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The process flow is long and the production cost is high;
[0005] (2) When niobium-zirconium master alloy and sponge zirconium are used to press electrodes, due to the large amount of niobium-zirconium scraps added, and the hardness of sponge zirconium particles is relatively large, the compactness and strength of the pressed electrodes are poor, easy to fall off, and it is difficult to assemble welding electrodes. and the risk of metallurgical defects

Method used

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  • Preparation method of R60705 zirconium alloy cast ingot
  • Preparation method of R60705 zirconium alloy cast ingot
  • Preparation method of R60705 zirconium alloy cast ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment includes the following steps:

[0028] Step 1. Turn and crush the niobium rod with the quality purity of 99.9% and the grade of Nb1 into niobium chips, and then carry out ultrasonic cleaning and magnetic separation treatment until the surface is clean, and there is no visible oil stain, oxide film and other metals or non-metals. Inclusions; the size (thickness×width×length) of the treated niobium chips is 0.5mm×5mm×5mm;

[0029] In step 2, the niobium chips and sponge zirconium treated in step 1 are batched according to the ratio of Zr-2.5Nb alloy, and then added to the mold cavity after mixing, and pressed with a 50MN hydraulic press to obtain an electrode block;

[0030] Step 3, place the electrode block obtained in step 2 in a vacuum plasma welding box to perform group welding with a vacuum plasma arc, cool for 10 minutes and release the furnace to obtain a group welding electrode;

[0031] Step 4: Load the assembled welding electrode obtained in ste...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] Step 1. Turn and crush the niobium rod with the quality purity of 99.99% and the grade of Nb1 into niobium chips, and then carry out ultrasonic cleaning and magnetic separation treatment until the surface is clean, and there is no visible oil, oxide film and other metals or non-metals. Inclusions; the size (thickness×width×length) of the treated niobium chips is 0.5mm×5mm×50mm;

[0042]In step 2, the niobium chips and sponge zirconium treated in step 1 are batched according to the ratio of Zr-2.5Nb alloy, and then added to the mold cavity after mixing, and pressed with a 50MN hydraulic press to obtain an electrode block;

[0043] Step 3, place the electrode block obtained in step 2 in a vacuum plasma welding box to perform group welding with a vacuum plasma arc, cool for 10 minutes and release the furnace to obtain a group welding electrode;

[0044] Step 4: Load the assembled welding electrode obtained in step 3 i...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Step 1. Turn and crush the niobium rod with the quality purity of 99.9% and the grade of Nb1 into niobium chips, and then carry out ultrasonic cleaning and magnetic separation treatment until the surface is clean, and there is no visible oil stain, oxide film and other metals or non-metals. Inclusions; the size (thickness×width×length) of the treated niobium chips is 0.5mm×5mm×20mm;

[0055] In step 2, the niobium chips and sponge zirconium treated in step 1 are batched according to the ratio of Zr-2.5Nb alloy, and then added to the mold cavity after mixing, and pressed with a 50MN hydraulic press to obtain an electrode block;

[0056] Step 3, place the electrode block obtained in step 2 in a vacuum plasma welding box to perform group welding with a vacuum plasma arc, cool for 10 minutes and release the furnace to obtain a group welding electrode;

[0057] Step 4: Load the assembled welding electrode obtained in st...

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Abstract

The invention discloses a preparation method of an R60705 zirconium alloy cast ingot. The method comprises the following steps: 1, turning a niobium rod, crushing the niobium rod into niobium chips, and treating the niobium chips; secondly, the treated niobium chips and sponge zirconium are subjected to burdening, mixing and pressing, and an electrode block is obtained; thirdly, the electrode blocks are installed and welded to obtain installed and welded electrodes; 4, performing primary smelting on the assembly welding electrode to obtain a primary ingot; fifthly, the multiple primary ingots are subjected to turning-around welding and then subjected to secondary smelting, and secondary ingots are obtained; and sixthly, after the multiple secondary ingots are turned around and welded, third-time smelting is conducted, and the R60705 zirconium alloy cast ingot is obtained. The niobium element is added in the form of niobium chips, so that the niobium chips and sponge zirconium are uniformly mixed, the compactness of an electrode block is improved, a block falling phenomenon is not easy to generate, the generation of inclusions is avoided, three times of smelting are combined, and process parameters of different melting times are controlled, so that the uniformity of components of the R60705 zirconium alloy cast ingot is improved, and the quality of the R60705 zirconium alloy cast ingot is improved. And metallurgical defects generated in the smelting process of the R60705 zirconium alloy cast ingot are avoided.

Description

technical field [0001] The invention belongs to the technical field of zirconium alloy preparation, in particular to a preparation method of an R60705 zirconium alloy ingot. Background technique [0002] R60705 is a zirconium alloy containing 2.5% niobium, in which niobium can improve its strength and plasticity, and is used in the field of sheet, wire and rod. Since the melting point of niobium is 2468°C, the melting point of zirconium is 1850°C, and the melting point of niobium is 613°C higher than that of zirconium, it is a refractory metal, and metallurgical defects are prone to occur during the preparation of R60705 zirconium alloy ingots, which will affect the later forging of plates, wires and wires. The properties and strength of the bar have a great impact, so it is very important that niobium is fully and uniformly smelted during the smelting process. [0003] At present, the conventional preparation method of R60705 zirconium alloy ingot is as follows: using spon...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C16/00
CPCC22C1/02C22C16/00Y02P10/20
Inventor 王超南刘华李佳佳张娜李维贠鹏飞
Owner WESTERN TITANIUM TECH