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Mg-containing high-strength deforming zinc-copper alloy and preparation method thereof

A zinc-copper alloy, high-strength technology, applied in the field of metal alloy material manufacturing, can solve the problems of comprehensive performance to be improved, and achieve the effect of good casting performance, good flow performance and reasonable component formula

Inactive Publication Date: 2010-12-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is some research on high-strength deformed zinc alloy abroad. In the late 1990s, Japan conducted a series of research on cold forging, heat-resistant and cast zinc alloys, and made some progress in the strength of the material. However, comprehensive Performance needs to be improved, especially for extruded zinc alloys, there is little research in this area
However, domestic research in this area is almost blank, which limits the application of wrought zinc alloys, especially as structural materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Alloy composition (percentage by weight): copper (Cu) 0.1%, magnesium (Mg) 3.0%, the rest is zinc (Zn) and impurities whose total amount is not more than 0.05%.

[0039] First, Cu and Mg are melted into Zn-Cu and Cu-Mg master alloys respectively. Under the condition of covering agent protection, the industrial pure zinc is completely melted, and then the master alloy is added. The melting temperature is 620-650°C. After melting, stir to remove slag, then cast into ingot at 450-480°C, after homogenization treatment at 360°C for 6 hours, extrude into round rod at 240°C with an extrusion ratio of 20, and ingot at 170°C Anneal 2h. The normal temperature tensile strength and yield strength of the alloy in this example reach 305Mpa and 258Mpa respectively, and the elongation is 19.8%.

Embodiment 2

[0041] Alloy composition (percentage by weight): copper (Cu) 1.58%, magnesium (Mg) 1.2%, the rest is zinc (Zn) and impurities whose total amount is not more than 0.05%.

[0042] First, Cu and Mg are respectively melted into Zn-Cu and Cu-Mg master alloys. Under the condition of covering agent protection, the industrial pure zinc is completely melted, and then the master alloy is added. The melting temperature is 650-680°C. After melting, stir to remove slag, then cast into ingot at 460-480°C, after homogenization treatment at 360°C for 9 hours, extrude into round rod at 280°C with an extrusion ratio of 15, and ingot at 180°C Anneal 2h. The normal temperature tensile strength and yield strength of the alloy in this embodiment reach 315Mpa and 263Mpa respectively, and the elongation is 19.1%.

Embodiment 3

[0044] Alloy composition (percentage by weight): copper (Cu) 3.2%, magnesium (Mg) 0.8%, the rest is zinc (Zn) and impurities whose total amount is not more than 0.05%.

[0045]First, Cu and Mg are respectively melted into Zn-Cu and Cu-Mg master alloys. Under the condition of covering agent protection, the industrial pure zinc is completely melted, and then the master alloy is added. The melting temperature is 670-700°C. After melting, stir to remove slag, and then cast into ingot at 480-500°C, after homogenization treatment at 380°C for 8 hours, extrude into round rod at 300°C, extrusion ratio is 12, and ingot at 200°C Anneal 3h. The normal temperature tensile strength and yield strength of the alloy in this example reach 328Mpa and 276Mpa respectively, and the elongation is 16.2%.

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Abstract

The invention relates to an Mg-containing high-strength deforming zinc-copper alloy. The alloy consists of the following components in percentage by mass: 0.1 to 5.0 percent of copper, 0.05 to 3.0 percent of magnesium and the balance of zinc and less than or equal to 0.05 percent of impurities. The alloy can also comprise the following components in percentage by mass: at least one of aluminum and titanium, wherein the aluminum accounts for 0.1 to 2.5 percent and the titanium accounts for 0.02 to 0.3 percent. The method for preparing the Mg-containing high-strength deforming zinc-copper alloy comprises the following steps of: smelting by adopting covering protection method, and adding alloy elements in forms of pure zinc, pure aluminum and intermediate alloys of Zn-Cu, Cu-Mg and Zn-Ti, wherein the smelting temperature is between 620 and 710 DEG C; casting at the temperature of between 450 and 500 DEG C, homogenizing ingots at the temperature of between 360 and 380 DEG C for 6 to 10 hours, and performing extrusion molding at the temperature of between 240 and 310 DEG C, wherein the extrusion ratio is between 10 and 20; and annealing at the temperature of between 170 and 210 DEG C for 2 to 4 hours. The Mg-containing high-strength deforming zinc-copper alloy has the advantages of high strength and comprehensive performance, good flowing property of alloy liquid and good casting performance, and can be used as a structural material.

Description

technical field [0001] The invention relates to a zinc-copper alloy and a preparation method thereof, in particular to a Mg-containing high-strength deformed zinc-copper alloy and a preparation method thereof, belonging to the technical field of manufacturing metal alloy materials. Background technique [0002] Low strength is one of the main bottlenecks that limit the popularization and application of wrought zinc alloys as structural components. In order to improve the strength of zinc alloy, some foreign researchers have carried out some research on the deformation mechanism, alloying and process conditions of zinc alloy. Deformed zinc alloy until the 1960s, due to the progress of smelting and processing technology, the research work on improving the physical and mechanical properties of zinc alloy has been accelerated, especially the mastery of high-strength variable zinc alloy smelting technology and processing technology has broken the Zinc alloys cannot be used as st...

Claims

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Application Information

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IPC IPC(8): C22C18/02C22C1/03
Inventor 肖来荣张喜民周泽鹏曾德露胡加瑞李威刘彦
Owner CENT SOUTH UNIV
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