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Method for improving super plasticity of copper-based superplastic alloy

A technology of plastic alloy and plastic properties, applied in the field of improving the superplastic properties of copper-based superplastic alloys, can solve the problems of unsatisfactory plasticity, difficult to reach 100%, etc. organizational effect

Inactive Publication Date: 2013-10-30
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plasticity of general industrial metals and alloys is not ideal. For example, the elongation of iron-based metals does not exceed 40%, and that of non-ferrous-based metals does not exceed 60%. Even at high temperatures, it is difficult to reach 100%.

Method used

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  • Method for improving super plasticity of copper-based superplastic alloy
  • Method for improving super plasticity of copper-based superplastic alloy
  • Method for improving super plasticity of copper-based superplastic alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Taking Cu-9.5Al-4Fe alloy as an example, the operation steps of this method are as follows:

[0021] Copper Alloy Composition:

[0022] components

Al

Fe

Cu

Weight percentage (%)

9.5

4

Residual weight

[0023] Preparation method of superplastic alloy:

[0024] 1. Conventional smelting with induction furnace and protection with inert gas. Put the above ingredients into the furnace and raise the temperature to 1200°C for melting and keep it warm for 30 minutes to ensure that the alloy is melted and mixed evenly;

[0025] 2. Then continue to raise the temperature of the alloy melt to overheat to 1360°C and keep it warm for 35 minutes. After the heat preservation is over, the rapid furnace is cooled to the pouring temperature range of 1150°C, and the heat preservation is continued for 10 minutes. Finally, continuous casting (water-cooled crystallizer) rapid solidification method is adopted to cast and stretch into 8mm thick ...

Embodiment 2

[0030] Taking Cu-2.8Al-1.8Si-0.4Co alloy as an example, the operation steps of this method are as follows:

[0031] Copper Alloy Composition:

[0032] components

Al

Si

co

Cu

Weight percentage (%)

2.8

1.8

0.4

Residual weight

[0033] Preparation method of superplastic alloy:

[0034] 1. Use induction furnace, resistance furnace, etc. for conventional melting, and protect with inert gas. Put the above ingredients into the furnace and raise the temperature to 1200°C for melting and keep it warm for 30 minutes to ensure that the alloy is melted and mixed evenly;

[0035] 2. Then continue to raise the temperature of the alloy melt to overheat to 1440°C and keep it warm for 25 minutes. After the heat preservation is over, the furnace is rapidly cooled to the pouring temperature range of 1180°C, and the heat preservation is continued for 5 minutes. Finally, continuous casting (water-cooled crystallizer) rapid solidification m...

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Abstract

The invention discloses a method for improving super plasticity of copper-based superplastic alloy. The super plasticity is improved by carrying out melt overheating treatment process on the copper-based superplastic alloy during a smelting period. The method comprises the steps of alloy melting, overheating treatment, cooling and pouring. According to the invention, at the smelting period of the copper-based alloy with high-temperature super plasticity, the structure of the alloy melts is influenced by the melt overheating treatment process, and heredity of a solid liquid structure is utilized to improve and perfect alloy tissue after solidification to enable the grain to be refined and equiaxial, thereby further improving the super plasticity of the alloy.

Description

technical field [0001] The invention belongs to the technical field of alloy heat treatment, and in particular relates to a method for improving the superplasticity of a copper-based superplastic alloy. Background technique [0002] The superplasticity and superplastic forming of alloys are a hot spot and emerging development subject in material science today. "Superplasticity" refers to the ability of materials to exhibit abnormally high plasticity under specific internal and external conditions, and to produce abnormally large tensile deformations without failure under low loads. The plasticity of general industrial metals and alloys is not ideal. For example, the elongation of iron-based metals does not exceed 40%, and that of non-ferrous-based metals does not exceed 60%. Even at high temperatures, it is difficult to reach 100%. However, superplastic alloys can produce hundreds of percent or even thousands of percent tensile deformation without necking and fracture. Sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22F1/08
Inventor 陈志浩黄仲佳
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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