Zinc-based alloy bar/plate with room-temperature superplasticity and preparation method thereof

A technology for alloy bars and alloy plates, applied in the field of materials, can solve the problems of small size range of alloys, difficult to meet practical application requirements, etc., and achieve the effects of large product size, high surface quality, simple process and equipment

Active Publication Date: 2019-05-10
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size range of the alloy prepared by the large plastic deformation process is small, which is difficult to meet the needs of practical applications.

Method used

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  • Zinc-based alloy bar/plate with room-temperature superplasticity and preparation method thereof
  • Zinc-based alloy bar/plate with room-temperature superplasticity and preparation method thereof
  • Zinc-based alloy bar/plate with room-temperature superplasticity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A zinc-based alloy bar with room temperature superplasticity, including components and mass percentages: 0.1% Cu, 1.5% Fe, 0.1% Mn, the total amount of other impurities is not more than 0.2%, and the balance is Zn; metal zinc , Metal copper, Zn-Fe master alloy, Zn-Mn master alloy as raw materials.

[0060] The preparation method of the zinc-based alloy bar with room temperature superplasticity comprises the following steps:

[0061] First, heat pure Zn in a graphite crucible to 580°C, and after melting, add metal copper, Zn-Fe master alloy, and Zn-Mn master alloy in turn, and stir until they are all melted and mixed evenly to obtain a zinc alloy melt. When the temperature of the melt is reduced to 520°C, use a graphite bell jar to add hexachloroethane to the melt in an amount of 0.5% of the mass of the melt, and then keep it for 15 minutes; During the process, the mold is cooled by water to obtain a cylindrical ingot with a diameter of 60 mm.

[0062] The ingot was ke...

Embodiment 2

[0064] A zinc-based alloy bar with room temperature superplasticity, including components and mass percentages: Cu 4%, Fe 0.05%, Mn 0.2%, the total amount of other impurities is not more than 0.2%, and the balance is Zn; metal zinc , Metal copper, Zn-Fe master alloy, Zn-Mn master alloy as raw materials.

[0065] The preparation method of the zinc-based alloy bar with room temperature superplasticity comprises the following steps:

[0066] First, heat pure Zn in a graphite crucible to 600°C, and after melting, add metal copper, Zn-Fe master alloy, and Zn-Mn master alloy in turn, and stir until they are all melted and mixed evenly to obtain a zinc alloy melt. When the temperature of the melt is reduced to 540°C, add hexachloroethane into the melt using a graphite bell jar in an amount of 0.8% of the mass of the melt, and then keep it for 20 minutes; before casting, the temperature of the melt is reduced to 500°C, During the process, the mold is cooled by water to obtain a cylin...

Embodiment 3

[0069] A zinc-based alloy bar with room temperature superplasticity, including components and mass percentages: Cu 0.5%, Fe2%, Mn0.5%, the total amount of other impurities is not more than 0.2%, and the balance is Zn; metal zinc, metal Copper, Zn-Fe master alloy, and Zn-Mn master alloy are used as raw materials.

[0070] The preparation method of the zinc-based alloy bar with room temperature superplasticity comprises the following steps:

[0071] First, heat pure Zn in a graphite crucible to 620°C. After melting, add metal copper, Zn-Fe master alloy, and Zn-Mn master alloy in turn. After all are melted, stir until they are evenly mixed to obtain a zinc alloy melt. When the temperature of the melt is reduced to 520°C, use a graphite bell jar to add hexachloroethane to the melt in an amount of 0.7% of the mass of the melt, and then keep it for 15 minutes; During the process, the mold is cooled by water to obtain a cylindrical ingot with a diameter of 60 mm.

[0072] The ingot...

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Abstract

The invention discloses a zinc-based alloy bar / plate with room-temperature superplasticity and a preparation method thereof. The zinc-based alloy bar / plate with the room-temperature superplasticity comprises the following components of, by the weight percent, 0.1-4% of Cu, 0.05-2% of Fe, 0.05-0.5% of Mn, less than or equal to 0.2% of inevitable impurities, and the balance Zn. The preparation method of the zinc-based alloy bar / plate with the room-temperature superplasticity comprises the following steps of heating and melting pure metallic zinc according to the proportion, adding metallic Cu and intermediate alloys sequentially, uniformly mixing melts to obtain a zinc alloy melt after all the metals are molten, cooling the zinc alloy melt, adding hexachloroethane, carrying out heat preservation, leaving the alloy melt to stand, cooling the alloy melt and casting the alloy melt into ingots, carrying out double-stage homogenization treatment, then carrying out heat treatment, and controlling relevant parameters to prepare the zinc-based alloy bar / plate with the room-temperature superplasticity. The preparation method of the zinc-based alloy bar / plate with the room-temperature superplasticity is simple in preparation process, a dynamic recrystallization process of alloys is controlled, and crystal grains are prevented from growing by pinning the grain boundary with second-phase particles, so that the crystal grains of basal bodies are markedly refined, the prepared zinc-based alloy bar / plate has high strength, high plasticity and good creep resistance and can meet application requirements in different fields.

Description

Technical field: [0001] The invention belongs to the technical field of materials, and in particular relates to a zinc-based alloy bar / plate with room temperature superplasticity and a preparation method thereof. Background technique: [0002] For some pure metals or alloys, when the grain size remains uniform and equiaxed below 10 μm; the deformation temperature is between 0.5 and 0.7 Tm (Tm melting point / K); the strain rate is generally 10 -3 ~10 -5 the s -1 Between the microstructure characteristics and deformation conditions, the material will exhibit high plasticity. If it is measured by tensile elongation at break, it can reach more than 100%, and this plastic deformation characteristic is called superplastic deformation. At the same time, superplastic deformation also has the characteristics of very small deformation resistance and uniform deformation without necking. Many superplastic metal materials have been discovered so far, which can be roughly divided into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/02C22C18/00C22C1/03C22F1/16
Inventor 任玉平李洪晓李松秦高梧
Owner NORTHEASTERN UNIV LIAONING
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