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Preparation method for Zr (zirconium)-Nb (niobium)-Cu (copper) system alloy

A technology of zr-nb-cu and zr-1nb-0.01cu, which is applied in the field of preparation of Zr-Nb-Cu alloys, can solve the problems of large particle size of the second phase, affecting the corrosion resistance of alloys, uneven distribution, etc. To achieve the effect of improving corrosion resistance

Active Publication Date: 2015-01-07
SUZHOU NUCLEAR POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the second phase particle size of the Zr-Nb-Cu alloy prepared by the processing technology of the prior art is large and unevenly distributed, which affects the corrosion resistance of the alloy.

Method used

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  • Preparation method for Zr (zirconium)-Nb (niobium)-Cu (copper) system alloy
  • Preparation method for Zr (zirconium)-Nb (niobium)-Cu (copper) system alloy
  • Preparation method for Zr (zirconium)-Nb (niobium)-Cu (copper) system alloy

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preparation example Construction

[0034] The preparation method of Zr-Nb-Cu alloy of the present invention comprises the following steps:

[0035] (1) Forging: forging zirconium alloy parts containing Nb and Cu elements at 800~900°C;

[0036] (2) Quenching: heat the forged part in step (1) for 20-40 minutes at 1000-1050°C and then quench it (quenching can be carried out in air);

[0037] (3) Hot extrusion: hot extrusion the quenched parts in step (2) at 550~600°C;

[0038] (4) First annealing: anneal the hot-extruded part in step (3) at 500-550°C for 2-4 hours;

[0039] (5) Three times of cold rolling and annealing: the workpiece after the first annealing in step (4) is then subjected to three times of cold rolling and annealing to obtain a Zr-Nb-Cu alloy;

[0040] In step (5), the specific steps of three cold rolling and annealing are as follows:

[0041] The first cold rolling and annealing: the first cold rolling is carried out on the workpiece after the first annealing in step (4), and after the deforma...

Embodiment 1

[0049] This embodiment provides a method for preparing a Zr-1Nb-0.01Cu alloy. The composition of the Zr-1Nb-0.01Cu alloy is: Nb1wt%, Cu0.01wt%, Zr balance and unavoidable impurities. The preparation method includes The following steps:

[0050] (1) Forging: forging zirconium alloy parts containing Nb and Cu elements at 800~900°C;

[0051] (2) Quenching: heat the forged part at 1020°C for 20 minutes and then quench it;

[0052] (3) Hot extrusion: hot extrusion the quenched parts in step (2) at 550~600°C;

[0053] (4) First annealing: anneal the hot-extruded part in step (3) at 550°C for 2 hours;

[0054] (5) Three times of cold rolling and annealing: the workpiece after the first annealing in step (4) is then subjected to three times of cold rolling and annealing to obtain a Zr-Nb-Cu alloy;

[0055] In step (5), the specific steps of three cold rolling and annealing are as follows:

[0056] The first cold rolling and annealing: the first annealed workpiece in step (4) is su...

Embodiment 2

[0060]This embodiment provides a method for preparing a Zr-1Nb-0.01Cu alloy. The composition of the Zr-1Nb-0.01Cu alloy is: Nb1wt%, Cu0.01wt%, Zr balance and unavoidable impurities. The preparation method includes The following steps:

[0061] (1) Forging: forging zirconium alloy parts containing Nb and Cu elements at 800~900°C;

[0062] (2) Quenching: heat the forged part at 1020°C for 20 minutes and then quench it;

[0063] (3) Hot extrusion: hot extrusion the quenched parts in step (2) at 550~600°C;

[0064] (4) First annealing: anneal the hot-extruded part in step (3) at 550°C for 2 hours;

[0065] (5) Three times of cold rolling and annealing: the workpiece after the first annealing in step (4) is then subjected to three times of cold rolling and annealing to obtain a Zr-Nb-Cu alloy;

[0066] In step (5), the specific steps of three cold rolling and annealing are as follows:

[0067] The first cold rolling and annealing: the first cold rolling is carried out on the wo...

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Abstract

The invention relates to a preparation method for a Zr (zirconium)-Nb (niobium)-Cu (copper) system alloy. The preparation method includes the steps of forging, quenching, hot extrusion, primary annealing, primary cold rolling and annealing, secondary cold rolling and annealing, and tertiary cold rolling and annealing, wherein in the primary cold rolling and annealing process, a workpiece after the primary annealing is treated with primary cold rolling, and treated with annealing treatment within a temperature range of 500 to 550 DEG C after the deformation reaches 50 to 70 percent; in the secondary cold rolling and annealing process, the workpiece after the primary cold rolling and annealing is treated with secondary cold rolling, and is treated with annealing treatment within a temperature range of 500 to 550 DEG C after the deformation reaches 50 to 70 percent; in the tertiary cold rolling and annealing process, the workpiece after the secondary cold rolling and annealing is treated with tertiary cold rolling, and is treated with annealing treatment within a temperature range of 450 to 520 DEG C after the deformation reaches 50 to 70 percent. Second-phrase particles of the Zr-Nb-Cu system alloy prepared through the method are distributed in a fine and dispersed manner; the corrosion resistance of the alloy prepared through the method is over 25 percent higher than that of alloys prepared through the traditional technique.

Description

technical field [0001] The invention belongs to the technical field of alloy thermal processing technology, and in particular relates to a preparation method of a Zr-Nb-Cu alloy. Background technique [0002] Zirconium alloy is the cladding material for dye elements in light water reactor nuclear power plants. The performance of zirconium alloy cladding determines the burnup of nuclear fuel, and the economics of nuclear power are also closely related to it. requirements. New zirconium alloys such as M5, Zirlo and E110 that have been commercially used have good corrosion resistance. The country is also developing new zirconium alloys of N18, N36 and C7. Since the C7 zirconium alloy is based on the Zr-1Nb alloy with a small amount of Cu element added, compared with the Zr-Nb alloy, its matrix α Zr / β Zr Both the phase transition and the growth behavior of the second phase particles will change significantly. However, the second phase particles of the Zr-Nb-Cu alloy produc...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22C16/00
CPCC22C16/00C22F1/186
Inventor 柏广海王荣山张晏玮梅金娜刘二伟耿建桥杜晨曦
Owner SUZHOU NUCLEAR POWER RES INST