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Cu-Zr-Nb series block non crystalline alloy

An amorphous alloy, cu-zr-nb technology, applied in the field of Cu-Zr-Nb alloy preparation, can solve the problems of difficult alloying of high-melting point element Nb, failure to obtain Cu-Zr-Nb alloy, etc.

Inactive Publication Date: 2004-12-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because Cu-Nb is a completely immiscible system and other reasons, it is difficult to completely alloy the high melting point element Nb into Cu-Zr alloys. So far, people have not been able to obtain Cu-Zr-Nb alloys with strong amorphous forming ability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one, Cu 52.5 Zr 46.2 Nb 1.3 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0029] The first step, the choice of alloy composition

[0030] According to the phase diagram characteristics of the Cu-Zr binary system alloy, in the Cu-rich region (40≤Cuwt.%≤65) in the amorphous formation region of the throwing band, the eutectic point (such as Cu 53 Zr 47 etc.), to obtain the best composition point of Cu-based amorphous in the Cu-Zr binary system, select Nb as another component, connect Cu 56 Zr 44 The eutectic point and the third component Nb construct a variable electron concentration line. Along Cu 53 Zr 47 -Nb variable electron concentration line design alloy composition (weight percent), such as Cu 52.5 Zr 46.2 Nb 1.3 ;

[0031] The second step, the weighing of the composition ratio

[0032] According to the designed alloy composition, the high-purity metal Zr, Nb and Cu raw materials with a purity of 99% are weighed in proportion,...

Embodiment 2

[0042] Embodiment two, Cu 51.2 Zr 45.0 Nb 3.8 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0043] The first step, the choice of alloy composition

[0044] The selection method of the alloy composition is the same as the first step in the embodiment one, determine the alloy composition---Cu 51.2 Zr 45.0 Nb 3.8 ;

[0045] The second step, the weighing of the composition ratio

[0046] According to the designed alloy composition, the high-purity metal Zr, Nb and Cu raw materials with a purity of 99% are weighed in proportion, wherein the amount of Cu is 51.2%, the amount of Zr is 45.0%, and the amount of Nb is 3.8%;

[0047] The third step, the smelting of Zr(Nb) pre-alloyed ingot

[0048] The smelting method of the Zr(Nb) pre-alloyed ingot adopts the method of the third step in the first embodiment. The melting temperature is 3000K, and the current density is 160A / cm 2 The argon gas pressure in the electric arc melting furnace is 0.03MPa, and after rep...

Embodiment 3

[0055] Embodiment three, Cu 45 Zr 40 Nb 15 Bulk amorphous alloy preparation

[0056] The first step, the choice of alloy composition

[0057] The selection method of the alloy composition is the same as the first step in the embodiment one, determine the alloy composition---Cu 45 Zr 40 Nb 15 ;

[0058] The second step, the weighing of the composition ratio

[0059] According to the designed alloy composition, the high-purity metal Zr, Nb and Cu raw materials with a purity of 99% are weighed in proportion, wherein the amount of Cu is 45%, the amount of Zr is 40%, and the amount of Nb is 15%;

[0060] The third step, the smelting of Zr(Nb) pre-alloyed ingot

[0061] The smelting method of the Zr(Nb) pre-alloyed ingot adopts the method of the third step in the first embodiment. The melting temperature is 3200K, and the current density is 170A / cm 2 The argon gas pressure in the electric arc melting furnace is 0.02MPa, after repeated smelting for 4 times, a Zr(Nb) pre-all...

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Abstract

A CuZrNb-series non-crystal alloy block with high thermal stability, hardness and yield strength has a formular: (CuxZr1-x)1-yNby, where x=40-65 wt.% and y=1-15 wt.%.Its preparing steps include smelting pure Zr and Nb metals in non-consumable electroarc furnace under protection of argon gas, cooling, turning it over, loading in water-cooled copper crucible, smelting several times to obtain Zr(Nb) prealloy, mixing with Cu, smelting several times to obtain uniform CuZrNb alloy and negative-pressure casting with copper mould.

Description

technical field [0001] The invention relates to the preparation of a Cu-Zr-Nb alloy with strong amorphous forming ability, belonging to the field of new materials. Background technique [0002] Amorphous metal alloys are a class of metals or alloys with short-range order and long-range disorder structures, and they have high comprehensive mechanical properties and unique physical and chemical properties. However, due to the influence of metal or alloy amorphous forming ability (that is, the ability to form amorphous alloy), the preparation of such materials requires a higher cooling rate, and the general critical cooling rate is 10 5 K / s. In the order of cooling speed from high to low, commonly used quenching technologies include: melt atomization, thin film deposition technology, and copper roller quenching strip machine technology. The material form is often low-dimensional materials such as powder, thin strip, etc., and its application range are therefore greatly restri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00
Inventor 董闯羌建兵王英敏夏俊海
Owner DALIAN UNIV OF TECH
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