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Contact material for zirconium alloy, filter medium and sprue using same

A technology of contact materials and filter media, which is applied in metal processing equipment, manufacturing tools, casting molding equipment, etc., can solve the problems of incomparable purification effect, sealing and strength problems, and inability to purify the melt, so as to avoid volume Variation and thermal effects, guaranteed performance effects

Active Publication Date: 2017-09-26
SHEN ZHEN TOP LINK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, since the filter medium cannot be installed in the integrated sprue, an assembled sprue is generally used. However, this type of sprue has problems with sealing and strength, and has the defect that it cannot purify all the melts, and the purification effect is difficult to compare with that of the integrated sprue. Formed sprue, so there is an urgent need for a sprue where the filter medium is integrally formed inside

Method used

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  • Contact material for zirconium alloy, filter medium and sprue using same
  • Contact material for zirconium alloy, filter medium and sprue using same
  • Contact material for zirconium alloy, filter medium and sprue using same

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 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 Zr4+ 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.

[0037] The preparation method of the contact material is as follows:

[0038] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0039] Step 2, wet ball milling for 20 hours, drying in an oven at 80°C and pulverizing;

[0040] 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. D...

Embodiment 2

[0067] 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.

[0068] The preparation method of the contact material is as follows:

[0069] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0070]Step 2, wet ball milling for 22 hours, drying in an oven at 90°C and pulverizing;

[0071] 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;

[0072] Step 4, wet ball milling for 36 hours, drying at 90°C, passing throu...

Embodiment 3

[0096] 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 12:100, the strengthening and stabilizing agent is 1% of the ceramic powder by weight, and the strengthening and stabilizing agent is preferably cerium-rich rare earth.

[0097] The preparation method of the contact material is as follows:

[0098] Step 1, mixing the ceramic powder and reinforcing stabilizer evenly;

[0099] Step 2, wet ball milling for 24 hours, drying in an oven at 100°C and pulverizing;

[0100] Step 3, calcining at 1450°C for 2.5 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;

[0101] Step 4: wet ball milling for 48 hours, drying at 100°C, passing thr...

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Abstract

A contact material for zirconium alloy, a filter medium using the material and a preparation method for a runner. The contact material for zirconium alloy is made of ceramic powder and a reinforcing stabilizer, and the ceramic powder is made of MgO and ZrO2 in a molar ratio of 6-12 : 100 composition, the strengthening stabilizer is 0.5%-1% of the ceramic powder by weight, and the strengthening stabilizer is cerium-rich rare earth. The contact material, the filter medium and the sprue using the material can avoid reacting with the zirconium alloy and contaminating the zirconium alloy during the casting and purification process of the zirconium alloy. The filter medium has good normal temperature strength and high temperature strength and can adapt to the purification process. The temperature change ensures the purification effect; the filter medium embedded in the sprue can ensure that all zirconium alloy melts are intercepted by the filter medium without dead ends, improving the purification effect.

Description

technical field [0001] The invention relates to the field of zirconium alloy purification, in particular to a contact material, a filter medium and a purification device for zirconium alloy purification. 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, which is called α phase. Its remarkable 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 , are rarely used as structural materials in other engineering fields, and there are few reports so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C16/00B22D21/06B22D27/00B22C9/04
Inventor 何明亮
Owner SHEN ZHEN TOP LINK TECH CO LTD