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Method for improving intensity of metal material

A metal material and strength technology, applied in the field of improving the strength of metal materials, can solve the problems of changes in the macroscopic properties of materials

Inactive Publication Date: 2015-03-18
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has limited changes to the macroscopic properties of the material, and can only slightly improve the strength of the material.

Method used

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  • Method for improving intensity of metal material
  • Method for improving intensity of metal material
  • Method for improving intensity of metal material

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0022] figure 1 It is a flowchart of a method for improving the strength of metal materials in an embodiment of the present invention, such as figure 1 As shown, the method of the present embodiment includes the following steps:

[0023] S11, selecting a metal material whose plastic deformation is dominated by twin deformation or phase transformation;

[0024] S12. Twisting the metal material so that the surface shear strain generated by the metal material satisfies a predetermined condition.

[0025] In terms of material selection in this embodiment: it is suitable for me...

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Abstract

The invention provides a method for improving the intensity of a metal material. The method comprises the following steps of: selecting the metal material, of which the plastic deformation is guided by twin crystal deformation or phase change; twisting the metal material, so that surface strain generated by the metal material meets predetermined conditions. According to the method provided by the invention, the intensity of the metal material can be improved observably without influences on the tension toughness of the metal material.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for improving the strength of metal materials. Background technique [0002] The strength and tensile toughness (the percentage increase in length of the material during stretching) of metallic materials have always been the focus of research, and the key factor lies in the opposition between the two: in traditional processing or processing, when When one of the indicators is increased, the characteristics of the other indicator tend to deteriorate. [0003] As the usual method of obtaining high material strength by reducing the grain size, when the grain size is reduced to the nanometer level (usually defined as a nano-polycrystalline material, the grain size is less than 100 nanometers), its strength can be higher than that of the traditional polycrystalline material. The crystalline material is an order of magnitude higher, but the toughness is correspondingly reduced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/10
Inventor 魏宇杰
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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