Zr-Sn-Nb-Hf alloy bar and manufacture method thereof

A zr-sn-nb-hf, alloy bar technology, applied in the field of alloy materials, can solve the problems of reducing the corrosion resistance of alloys, adverse effects of material properties, reducing material plasticity, etc., and achieves good room temperature plasticity, excellent room temperature and high temperature. Strength, the effect of improving plasticity

Active Publication Date: 2016-09-07
西安西部新锆科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the addition of transition metals Fe, Cr, and Ni to these Zr-Sn-Nb alloys, Zr 2 (Fe,Ni)Zintl phase, Zr(Cr,Fe) 2 Laves phase, and Nb-containing (ZrNb) 3 , Fe(ZrNb) 2 , FeZr(FeNb) 2 , (ZrNb) 3 Fe and other brittle phases, the second phase of these intermetallic compounds reduces the plasticity of the material, and the second phase particl

Method used

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  • Zr-Sn-Nb-Hf alloy bar and manufacture method thereof
  • Zr-Sn-Nb-Hf alloy bar and manufacture method thereof

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Embodiment 1

[0028] The Zr-Sn-Nb-Hf alloy bar in this embodiment is made of the following raw materials in mass percentage: Sn 1.0%, Nb 0.3%, Hf 1.2%, and the balance is Zr and unavoidable impurities.

[0029] The preparation method of the present embodiment Zr-Sn-Nb-Hf alloy bar comprises the following steps:

[0030] Step 1. Put high-purity Sn, high-purity Nb and high-purity Hf into a non-consumable vacuum electric arc furnace; first evacuate to less than 1×10 -2 Pa, then filled with argon, under the protection of argon, smelted three times at a melting temperature of 2700 ° C to obtain a Sn-Nb-Hf master alloy with uniform composition; the high-purity Sn, high-purity Nb and high-purity Hf The mass purity of all products is not less than 99%;

[0031] Step 2. Mechanically crush the Sn-Nb-Hf master alloy described in step 1, then mix the crushed Sn-Nb-Hf master alloy with the sponge Zr and press it to form an electrode; the mass of the sponge Zr Purity not less than 99%;

[0032] Step 3...

Embodiment 2

[0038] The Zr-Sn-Nb-Hf alloy bar in this embodiment is made of the following raw materials in mass percentage: Sn 1.0%, Nb 0.3%, Hf 1.2%, and the balance is Zr and unavoidable impurities.

[0039] The preparation method of the present embodiment Zr-Sn-Nb-Hf alloy bar comprises the following steps:

[0040] Step 1. Put high-purity Sn, high-purity Nb and high-purity Hf into a non-consumable vacuum electric arc furnace; first evacuate to less than 1×10 -2 Pa, then filled with argon, under the protection of argon, smelted once at a melting temperature of 2600 ° C to obtain a Sn-Nb-Hf master alloy; the mass purity of the high-purity Sn, high-purity Nb and high-purity Hf None less than 99%;

[0041] Step 2. Mechanically crush the Sn-Nb-Hf master alloy described in step 1, then mix the crushed Sn-Nb-Hf master alloy with the sponge Zr and press it to form an electrode; the mass of the sponge Zr Purity not less than 99%;

[0042] Step 3. Place the electrode described in step 2 in a ...

Embodiment 3

[0047] The Zr-Sn-Nb-Hf alloy bar in this embodiment is made of the following raw materials in mass percentage: Sn 1.0%, Nb 0.3%, Hf 1.2%, and the balance is Zr and unavoidable impurities.

[0048] The preparation method of the present embodiment Zr-Sn-Nb-Hf alloy bar comprises the following steps:

[0049] Step 1. Put high-purity Sn, high-purity Nb and high-purity Hf into a non-consumable vacuum electric arc furnace; first evacuate to less than 1×10 -2 Pa, then filled with argon, and under the protection of argon, repeated smelting at a melting temperature of 2800 ° C for 3 times to obtain a Sn-Nb-Hf master alloy with uniform composition; the high-purity Sn, high-purity Nb and high-purity The mass purity of Hf is not less than 99%;

[0050] Step 2. Mechanically crush the Sn-Nb-Hf master alloy described in step 1, then mix the crushed Sn-Nb-Hf master alloy with the sponge Zr and press it to form an electrode; the mass of the sponge Zr Purity not less than 99%;

[0051] Step ...

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Abstract

The invention provides a Zr-Sn-Nb-Hf alloy bar. The Zr-Sn-Nb-Hf alloy bar comprises the following components in percentage by mass: 0.8%-1.2% of Sn, 0.2%-0.4% of Nb, 0.8%-1.6% of Hf and the balance of Zr and inevitable impurities. The invention further provides a method for manufacturing the Zr-Sn-Nb-Hf alloy bar. The method comprises the following steps: 1, a Sn-Nb-Hf intermediate alloy is manufactured through vacuum non-consumable arc melting; 2, the Sn-Nb-Hf intermediate alloy is broken and is uniformly mixed with sponge Zr, and then the mixture is compacted into an electrode; 3, an ingot casting is obtained through vacuum consumable arc melting; 4, a semi-product bar blank is obtained through hot extrusion; and 5, the Zr-Sn-Nb-Hf alloy bar is obtained through hot extrusion. The Zr-Sn-Nb-Hf alloy bar has excellent room-temperature and high-temperature strength and good plasticity, and can be used as a structure material under a next-generation high-burnup condition.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a Zr-Sn-Nb-Hf alloy rod and a preparation method thereof. Background technique [0002] Zirconium alloys have been widely used in nuclear reactors due to their low neutron absorption cross section, excellent in-reactor corrosion performance, good processability and mechanical properties. Nuclear fuel element cladding zirconium alloy is one of the key core materials of nuclear power reactors. The advancement, safety, reliability and economy of nuclear power are closely related to the performance of the cladding materials used. In the past few decades, the performance of zirconium alloy for PWR fuel element cladding in the reactor is satisfactory. However, with the development of nuclear power reactor technology in the direction of increasing fuel burnup and reducing fuel cycle costs, increasing reactor thermal efficiency, and improving safety and reliability, ...

Claims

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Application Information

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IPC IPC(8): C22C16/00C22C1/03C22B9/20B21C23/08B21C37/04
CPCB21C23/08B21C37/04C22B9/20C22C1/03C22C16/00
Inventor 张建军李中奎文惠民周军石明华田锋李新意
Owner 西安西部新锆科技股份有限公司
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