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Zirconium alloy melting and casting method

A casting method and technology of zirconium alloy, applied in the field of zirconium alloy smelting and casting, can solve the problems of high energy consumption and many smelting times, and achieve the effect of improving purification effect, improving mechanical properties and improving metallographic structure

Active Publication Date: 2015-10-21
SHEN ZHEN TOP LINK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with the publication number CN102260807A melts zirconium alloys by means of a consumable electric arc furnace, which has the defects of many times of melting and high energy consumption

Method used

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  • Zirconium alloy melting and casting method
  • Zirconium alloy melting and casting method
  • Zirconium alloy melting and casting method

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preparation example Construction

[0040] The present invention also provides a method for preparing the above-mentioned contact material for zirconium alloy, comprising the following steps:

[0041] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0042] Step 2, wet ball milling for 20-24 hours, drying at 80-100°C and pulverizing;

[0043] Step 3, calcining at 1400-1450°C for 1.5-6 hours, cooling, and pulverizing;

[0044] Step 4, wet ball milling for 24-48 hours, drying at 80-100°C, crushing and screening.

[0045] The present invention also provides a method for preparing a filter medium using the contact material, comprising the following steps:

[0046] Step 1, pretreatment, immersing the three-dimensional polyurethane foam sponge skeleton in a NaOH solution with a concentration of 10% to 20% by mass, hydrolyzing it at a temperature of 40 to 60°C for 2 to 4 hours, then repeatedly rubbing and rinsing with clean water, and then drying it in the air, thereby clean the sponge;

[0047...

Embodiment 1

[0068] The contact material of the present embodiment is made of ceramic powder and reinforcing stabilizer, and said ceramic powder is made of MgO and ZrO 2 According to the molar ratio of 6:100, the strengthening and stabilizing agent is 0.5% of the ceramic powder by weight, and the strengthening and stabilizing agent is preferably cerium-rich rare earth. The cationic radius of MgO and Zr 4+ close, they are in ZrO 2 The solubility in the medium is very large, and it can be mixed with ZrO 2 Form substitutional solid solutions of monoclinic, tetragonal and cubic crystal forms.

[0069] The preparation method of the contact material is as follows:

[0070] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0071] Step 2, wet ball milling for 20 hours, drying in an oven at 80°C and pulverizing;

[0072] Step 3, calcining at 1400°C for 1.5 hours, cooling, and pulverizing, so that the contact material after treatment is uniform and the phase body is stable....

Embodiment 2

[0099] The contact material of the present embodiment is made of ceramic powder and reinforcing stabilizer, and said ceramic powder is made of MgO and ZrO 2 According to the molar ratio of 8.5:100, the strengthening and stabilizing agent is 0.8% of the ceramic powder by weight, and the strengthening and stabilizing agent is preferably cerium-rich rare earth.

[0100] The preparation method of the contact material is as follows:

[0101] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0102] Step 2, wet ball milling for 22 hours, drying in an oven at 90°C and pulverizing;

[0103] Step 3: calcining at 1425°C for 2 hours, cooling, and pulverizing, so that the contact material after treatment is uniform and the phase body is stable. Due to the solid solution treatment in advance, it lays a foundation for subsequent sintering uniformity, and the strength of the material is higher;

[0104] Step 4, wet ball milling for 36 hours, drying at 90°C, passing thro...

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Abstract

A zirconium alloy melting and casting method comprises the following steps: 1, carrying out primary melting: carrying out sampling analysis on components of a zirconium alloy ingot to determine needed alloy elements; 2, carrying out secondary melting: adjusting alloy components, and stirring to make components of zirconium alloy melt uniform; 3, preparing a purifying technology through preheating a filtering medium-embedded runner to 1000-1200DEG C, and preparing an ingot casting die through cleaning the surface of the ingot casting die to realize no adhesion of impurities or oil stains; and 4, casting and purifying: pouring the molten zirconium alloy melt into the runner, allowing the zirconium alloy melt to go through the filtering medium in order to make impurities in the alloy melt intercepted and adsorbed by the filtering medium and clean zirconium alloy melt to enter the ingot casting die, and cooling to form a cast ingot. The method has the advantages of simple operation, low energy consumption and good purification effect.

Description

technical field [0001] The invention relates to a zirconium alloy melting and casting method. Background technique [0002] At present, the content of zirconium in the earth's crust is very rich, ranking 20th in terms of abundance. The high corrosion resistance and extremely high melting point (1860°C) of metal zirconium are extremely useful in the fields of aerospace, ships and nuclear power. Potential new structural materials. Zirconium has a close-packed hexagonal structure at room temperature, called a phase, and its notable feature is that the tensile strength at room temperature is very low, less than 400MPa, which cannot meet the requirements of structural materials for mechanical properties. Therefore, in addition to being used in the nuclear industry , It is rarely used as a structural material in other engineering fields, and there are few reports so far. α-Zr undergoes an allotropic transformation at 865°C and transforms into body-centered cubic β-Zr. As the app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C16/00
Inventor 何明亮
Owner SHEN ZHEN TOP LINK TECH CO LTD
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