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An extrusion method for controlling the texture of magnesium alloy sheets by using the surface interface structure

A technology of interface structure and extrusion method, applied in the field of magnesium alloy sheet, regulating the texture of magnesium alloy extruded sheet, can solve the problems of reducing the stamping and forming performance of the sheet, and achieve the effect of improving the secondary forming ability

Active Publication Date: 2019-02-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although extrusion is one of the main processing methods for magnesium alloy sheets, the sheet will have a strong base surface texture after conventional extrusion processing, which reduces the stamping performance of the sheet.

Method used

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  • An extrusion method for controlling the texture of magnesium alloy sheets by using the surface interface structure
  • An extrusion method for controlling the texture of magnesium alloy sheets by using the surface interface structure
  • An extrusion method for controlling the texture of magnesium alloy sheets by using the surface interface structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The initial size of the two AZ31 ingots is φ80×75mm, and then they are placed in a resistance wire heating furnace for homogenization heat treatment. Next, wire cutting is used to cut the magnesium ingot into a cross-section projected as a plum-blossom composite surface, one of which is the core material and the other is the packaging material. After the composite interface is polished and degreased, the AZ31 substrate core material and packaging material are nested together inside and outside and fixed with magnesium strips. cross section as figure 1 as shown in a. Next, compound extrusion is carried out on it, the extrusion temperature is 400° C., and the thickness of the final composite plate is 3 mm.

[0031] figure 2 It is a finite element analysis simulation comparison diagram of the stress state at the interface when the quincunx-shaped interface structure and the conventional structure are co-extruded in Example 1 of the present invention. It can be seen t...

Embodiment 2

[0033] The initial size of the AZ31 and ZK60 ingots is φ80×75mm, and then they are placed in a resistance wire heating furnace for homogenization heat treatment. Next, use wire cutting to cut the magnesium ingot into a cross-section and project it into a plum-blossom composite surface, where AZ31 is the core material and ZK60 is the packaging material. After the composite interface is polished and degreased, the AZ31 core material and the ZK60 packaging material are nested inside and outside and fixed with magnesium strips. Next, it is subjected to extrusion compounding, the extrusion temperature is 400° C., and the thickness of the final composite plate is 3 mm.

Embodiment 3

[0035] The initial size of the two magnesium alloy ZK60 ingots is φ80×75mm, and then they are placed in a resistance wire heating furnace for homogenization heat treatment. Next, the magnesium ingots were cut into cross-sectional projections into hexagonal composite surfaces using wire cutting. After the composite interface is polished and degreased, the ZK60 substrate core material and packaging material are nested together inside and outside and fixed with magnesium strips. cross section as figure 1 as shown in b. And perform composite extrusion on it, the extrusion temperature is 400° C., and the thickness of the final composite sheet is 3 mm.

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Abstract

The invention discloses a squeezing method for regulating and controlling the texture of a magnesium alloy sheet by utilizing a hook-face interface structure. The squeezing method comprises the following steps that (1) two magnesium alloy base materials are combined into a cylindrical blank in an internal and external nested mode and fixed, the internal base material forms a core material, the external base material forms a packing material, and the junction surface of the two magnesium alloy base materials has the same or corresponding hook-face interface structure; and (2) the combined cylindrical blank is subjected to squeezing to be processed into a sheet at the hot squeezing temperature. According to the squeezing method for regulating and controlling the texture of the magnesium alloy sheet by utilizing the hook-face interface structure, the interface of a magnesium alloy is in an unsymmetrical stress state different from a traditional squeezing processing process in the combined squeezing process, the stress state can result in different degrees of deflection of the grain orientation, finally the basal texture of a magnesium alloy component is weakened, and promoting of the secondary forming capability of the squeezed sheet is facilitated.

Description

technical field [0001] The invention relates to a magnesium alloy plate, in particular to a method for regulating and controlling the texture of a magnesium alloy extruded plate, and belongs to the technical field of magnesium alloy processing. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and rigidity, good damping and shock absorption performance, large thermal diffusivity, easy chip processing, and easy recycling. The high-strength and low-quality characteristics of magnesium alloys make them widely used in the fields of automobiles, aerospace and electronic products. Extrusion is one of the most common processing methods for magnesium alloy sheets. Magnesium alloys exhibit good properties after extrusion, improving the strength and plasticity of magnesium alloys. Moreover, compared with other processing methods, extrusion can be formed at one time, and the processing efficiency is high. In addition, the extrusi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/22C22F1/06
CPCB21C23/22C22F1/06
Inventor 信运昌孙正彭研硕陈敏刘庆
Owner CHONGQING UNIV
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