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A kind of copper chromium zirconium alloy and preparation method thereof

An alloy, chromium-zirconium-copper technology, applied in the field of copper-chromium-zirconium alloy and its preparation, to achieve the effects of improving subsequent deformation ability, reducing electron scattering probability, and improving electrical conductivity

Active Publication Date: 2017-08-29
SHANTOU HUAXING (RAOPING) COPPER IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the existing chromium-zirconium copper alloys are difficult to meet the requirements of high tensile strength, high electrical conductivity and high elongation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the preparation method of chromium zirconium copper alloy comprises the following steps in turn:

[0024] (1) Equipped with copper, chromium, zirconium, magnesium, and yttrium elements in proportion, through vacuum purification, smelting, and split-flow pouring to obtain casting billets;

[0025] In this step, by weight, the prepared raw materials contain: 1.3% chromium, 0.2% zirconium, 0.02% magnesium, 0.04% yttrium, and the balance is copper. Chromium element is added with chromium powder (the particle size of chromium powder is 200-500 mesh), zirconium element is added with sponge zirconium, magnesium element is added with magnesium-copper master alloy, yttrium element is added with yttrium-copper master alloy, and copper element is added with copper block ( Copper element also includes copper contained in magnesium-copper master alloy and yttrium-copper master alloy).

[0026] In this step (1), the process of vacuum purification smelting and spl...

Embodiment 2

[0036] In this embodiment, the preparation method of chromium zirconium copper alloy comprises the following steps in turn:

[0037] (1) Equipped with copper, chromium, zirconium, magnesium, and yttrium elements in proportion, through vacuum purification, smelting, and split-flow pouring to obtain casting billets;

[0038] In this step, by weight, the prepared raw materials contain: 0.7% chromium, 0.3% zirconium, 0.08% magnesium, 0.1% yttrium, and the balance is copper. Chromium element is added with chromium powder (the particle size of chromium powder is 200-500 mesh), zirconium element is added with sponge zirconium, magnesium element is added with magnesium-copper master alloy, yttrium element is added with yttrium-copper master alloy, and copper element is added with copper block ( Copper element also includes copper contained in magnesium-copper master alloy and yttrium-copper master alloy).

[0039]In this step (1), the process of vacuum purification smelting and split...

Embodiment 3

[0049] In this embodiment, the preparation method of chromium zirconium copper alloy comprises the following steps in turn:

[0050] (1) Equipped with copper, chromium, zirconium, magnesium, and yttrium elements in proportion, through vacuum purification, smelting, and split-flow pouring to obtain casting billets;

[0051] In this step, by weight, the prepared raw materials contain: 2.0% chromium, 0.07% zirconium, 0.05% magnesium, 0.02% yttrium, and the balance is copper. Chromium element is added with chromium powder (the particle size of chromium powder is 200-500 mesh), zirconium element is added with sponge zirconium, magnesium element is added with magnesium-copper master alloy, yttrium element is added with yttrium-copper master alloy, and copper element is added with copper block ( Copper element also includes copper contained in magnesium-copper master alloy and yttrium-copper master alloy).

[0052] In this step (1), the process of vacuum purification smelting and sp...

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Abstract

A copper chromium zirconium alloy comprises, by weight, 0.7% to 2.0% of chromium, 0.05% to 0.3% of zirconium, 0.01% to 0.08% of magnesium, 0.01% to 0.1% of yttrium and the balance copper. The invention further provides a preparing method of the copper chromium zirconium alloy. The preparing method sequentially comprises the following steps that firstly, the copper, the chromium, the zirconium, the magnesium and the yttrium are prepared according to the proportion and are subject to vacuum purified smelting and flow dividing type casting, and a casting blank is prepared; secondly, the casting blank is subject to homogenization treatment and hot extrusion, and a sheared billet is prepared; thirdly, the sheared billet is subject to solid-solution treatment; fourthly, the sheared billet obtained after the solid-solution treatment is subject to cold deformation machining; and fifthly, a material obtained after cold deformation machining is subject to aging treatment, and the needed copper chromium zirconium alloy is obtained. The copper chromium zirconium alloy has the good comprehensive performance, the room temperature tensile strength of the copper chromium zirconium alloy is larger than 520 MPa, the room temperature elongation of the copper chromium zirconium alloy is larger than or equal to 22%, the room temperature electric conductivity of the copper chromium zirconium alloy is larger than or equal to 90%IACS, and the 350 DEG C high-temperature tensile strength of the copper chromium zirconium alloy is larger than 390 MPa.

Description

technical field [0001] The invention relates to the technical field of copper alloy materials, in particular to a copper-chromium-zirconium alloy and a preparation method thereof. Background technique [0002] As a high-strength and high-conductivity precipitation-strengthened copper alloy, copper-chromium-zirconium alloys have important uses in the fields of rail transit, electronics, electric power, and equipment manufacturing. The key material of cast steel mold and blast furnace cooling plate. Compared with foreign countries, there is still a big gap between copper-chromium-zirconium alloys in my country, and the production volume is very small. The main problems are low alloy strength, low electrical conductivity and poor processing performance, which cannot meet the current domestic economic development needs. [0003] In recent years, laboratories of domestic universities and research institutes have carried out research and development of high-strength and high-cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22F1/08
CPCC22C9/00C22F1/08
Inventor 杨院生佘京鹏李应举李立鸿张奎良钟敏冯小辉吴渊罗天骄
Owner SHANTOU HUAXING (RAOPING) COPPER IND CO LTD
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