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A high-hardness zinc-copper-aluminum alloy

An aluminum alloy and high-hardness technology, which is applied in the field of high-hardness zinc-copper-aluminum alloys, can solve the problems of affecting alloy performance, large raw material burning loss, and reduced impact toughness at room temperature, so as to improve hardness and wear resistance and reduce production costs Effect

Active Publication Date: 2021-07-27
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it uses Al, Zn, and Cu as raw materials for direct melting, and the melting points of Al, Zn, and Cu components are quite different. This melting method will cause large burning loss of raw materials and affect the properties of the alloy.
The room temperature impact toughness of the alloy is not studied in it, because the increase in hardness often leads to a significant decrease in room temperature impact toughness

Method used

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  • A high-hardness zinc-copper-aluminum alloy
  • A high-hardness zinc-copper-aluminum alloy
  • A high-hardness zinc-copper-aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0022] 1. Preparation of Zn-Cu-Al alloy 33.3Zn-33.3Cu-33.3Al with equal mass ratio

[0023] First, put 60g of industrial pure zinc and 120g of Al-50Cu master alloy into a graphite crucible for heating and smelting in a well-type electric furnace. The smelting temperature is 750°C. After complete melting, stir and let stand for 5 minutes. Add refining agent C. 2 Cl 6 , the amount of refining agent added is 0.3% of the total charge, and then allowed to stand for 30 minutes for slag removal and casting.

[0024] figure 1 It is the microstructure of zinc-copper-aluminum alloy with equal mass ratio, and the microstructure of the alloy is composed of Zn phase, Al phase, Al 2 It is composed of Cu phase and Al4.2Cu3.2Zn0.7. It can be seen from the microstructure that there is no obvious segregation of alloy elements in the microstructure of the alloy, and there is no need to refine the grain size of the alloy by heat treatment after casting. The medium-coarse phase is the matrix ph...

Embodiment example 2

[0028] 1. Preparation of 32Zn-32Cu-36Al alloy

[0029] First, put 64g of industrial pure zinc, 8g of industrial pure aluminum and 128g of Al-50Cu into a graphite crucible for heating and smelting in a well-type electric furnace. The smelting temperature is 750℃. Refining agent, let stand for another 30 minutes, carry out slag removal and casting, and naturally cool to room temperature after casting. The 32Zn-32Cu-36Al alloy of the present invention is obtained. figure 2 It is the microstructure of 32Zn-32Cu-36Al alloy.

[0030] 2. Mechanical properties of 32Zn-32Cu-36Al alloy

[0031] The impact specimen is a cylindrical specimen, Figure 5 The dimensions of the die-cast zinc alloy impact specimen. The mechanical properties of 32Zn-32Cu-36Al alloy samples were tested, the room temperature hardness was 90HRB (Hv274.5), the room temperature impact toughness did not change much, and the room temperature impact toughness was 0.88J / cm 2 .

Embodiment example 3

[0033] 1. Preparation of 36Zn-32Cu-32Al alloy

[0034] First, put 72g of industrial pure zinc and 128g of Al-50Cu into a graphite crucible for heating and smelting in a pit electric furnace. The smelting temperature is 750°C. After complete melting, stir and let stand for 5 minutes. Set aside for 30 minutes, carry out slag removal and casting, and naturally cool to room temperature after casting. The 36Zn-32Cu-32Al alloy of the present invention is obtained. image 3 It is the microstructure of 36Zn-32Cu-32Al alloy.

[0035] 2. Mechanical properties of 36Zn-32Cu-32Al alloy

[0036] The impact specimen is a cylindrical specimen, Figure 5 The dimensions of the die-cast zinc alloy impact specimen. The mechanical properties of 36Zn-32Cu-32Al alloy samples were tested, the room temperature hardness was 92HRB (Hv284.8), the room temperature impact toughness did not change much, and the room temperature impact toughness was 1.85J / cm 2 .

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Abstract

The invention belongs to the field of nonferrous metal processing, and in particular relates to a high-hardness zinc-copper-aluminum alloy. The invention uses Al-50Cu master alloy, industrial pure copper, industrial pure aluminum and industrial pure zinc as raw materials, adopts the method of smelting, casting and natural cooling to prepare high-hardness wear-resistant zinc-copper-aluminum alloy, and the composition of the alloy is 30-38%. Zn, 30-38% Cu and 30-38% Al, the unavoidable impurity content is less than 0.8%, the preferred alloy composition is copper, aluminum and zinc metal components with equal mass percentages, and its hardness and wear resistance are the best. The zinc-copper-aluminum alloy with high hardness obtained by the invention can be applied to industrial fields such as machinery and mines.

Description

technical field [0001] The invention relates to a high-hardness zinc-copper-aluminum alloy, and more particularly to a high-hardness zinc-copper-aluminum alloy of equal mass ratio. Background technique [0002] Casting methods are widely used in various fields, such as electronic parts, optical instruments, automobiles, textiles, construction, measuring instruments, etc., especially the production of auto parts. [0003] Pure copper is soft, with a reddish-orange metallic luster on the surface. It has good ductility, thermal conductivity and electrical conductivity. Therefore, it is widely used in refrigeration, electric power and other industries. It is second only to aluminum in the consumption of non-ferrous metal materials in China. Since the 1930s, due to the increase in the use of copper and the consumption of mineral resources, the tense situation of copper resources has begun to appear around the world, resulting in more and more expensive copper raw materials and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/06C22C1/03
CPCC22C1/03C22C30/02C22C30/06
Inventor 王建华王志文彭浩平刘亚苏旭平
Owner CHANGZHOU UNIV
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