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Method for improving tensile strength of zirconium and zircaloy

A technology for tensile strength and zirconium alloys, which is applied in the field of improving the tensile strength of zirconium and zirconium alloys, can solve problems such as low tensile strength, restricting the development of zirconium industry, and affecting the industrial application of zirconium materials, so as to achieve easy operation and prevent inclusion defects , evenly distributed effect

Active Publication Date: 2009-07-29
BAOJI TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country does not have a complete industrial production system for industrial zirconium materials. The nuclear-grade nuclear industrial-grade zirconium materials used in China mainly rely on foreign imports, which largely restricts the development of my country's zirconium industry.
[0004] At present, in the production field of zirconium and zirconium alloys, zirconium materials processed from zirconium ingots produced by sponge zirconium have good plasticity, but their tensile strength and other properties are relatively low, which affects the industrial application of zirconium materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh 100kg of zirconium sponge with an oxygen content of 0.06% (wt), 0.1kg of zirconium dioxide, fully mix the zirconium dioxide powder and zirconium sponge and press it into an electrode block, and use plasma arc welding to weld the electrode block into the required Standard zirconium electrodes are then smelted into ingots by at least two vacuum electric arc furnaces. It is necessary to control the vacuum degree, air leakage rate and ingot cooling time during the smelting process. After strict process control of batching, electrode pressing, electrode welding, and smelting, the oxygen content of the head and bottom of the zirconium ingot is 0.09%, 0.08%, and the ingot is inspected by chemical composition analysis and surface quality. After passing the forging, rolling, etc. Zirconium materials with good quality and controlled oxygen content are produced to meet the needs of industrial use.

Embodiment 2

[0025] Accurately weigh 100kg of zirconium sponge with an oxygen content of 0.08% (wt), 0.81kg of zirconium dioxide, and zirconium ingots can be obtained according to the steps in Example 1, and the chemical analysis results of the oxygen content at the head and bottom of the zirconium ingot are: 0.29%, 0.30% .

Embodiment 3

[0027] Accurately weigh required zirconium sponge and zirconium-tin-iron-chromium-nickel master alloy total 100kg, its comprehensive oxygen content 0.08% (wt), need to mix in the zirconium dioxide 0.155kg, can make Zr- 2 alloy ingot, the chemical analysis results of the oxygen content in the head and bottom of the zirconium ingot are: 0.13%, 0.135%.

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Abstract

A method for improving tensile strength of zirconium and zirconium alloy relates to a preparing method for the zirconium and zirconium alloy, being used in the preparing process of the zirconium and zirconium alloy for nuclear power, metallurgy, petrochemical industry and other fields. The invention is characterized in that the zirconium and zirconium alloys are added with zirconium dioxide during smelting, and oxygen content in the zirconium and zirconium alloys is controlled to be 0.08% to 0.3%. In the method of the invention, embarking on controlling oxygen content in the zirconium and zirconium alloy, and adding zirconium dioxide during ingot melting of the zirconium and zirconium alloy, the oxygen content in the zirconium and zirconium alloy is controlled by controlling addition amount of the zirconium dioxide; the produced zirconium ingot has uniform oxygen distribution and no metallurgical defects, such as impurities and the like. The present invention has obvious advantages, such as simple operation, accurate control, stability and the like, solves the problem of adding oxygen in zirconium ingot smelting process, and effectively improves conventional performance such as tensile strength and the like to meet the requirement of zirconium materials in industry without affecting the performance of zirconium materials such as corrosion resistance.

Description

technical field [0001] A method for improving the tensile strength of zirconium and zirconium alloys relates to a preparation method of zirconium and zirconium alloys, which is used in the preparation process of zirconium and zirconium alloys used in nuclear power, metallurgy, petrochemical and other fields. Background technique [0002] Zirconium is a transition group element, belonging to IV-B group elements in the periodic table, it is not only a rare metal, but also a strategic metal. Zirconium has good plasticity and strong corrosion resistance, and its corrosion resistance is better than that of titanium. Experimental studies and typical cases have proved that zirconium has excellent corrosion resistance in many commonly used acid and alkali media. Zirconium has excellent corrosion resistance in these media. The characteristics are very unique. It can also be used under the condition of acid and alkali interchange. For example, zirconium can resist the erosion of vario...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C16/00
Inventor 李献军陈峰贾栓孝张健任春艳冯军宁何育兴陈战乾王永强
Owner BAOJI TITANIUM IND CO LTD
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