Unlock instant, AI-driven research and patent intelligence for your innovation.

Orthogonal lamination extrusion equipment and application for preparing ultra-fine equiaxed grain aluminum alloy

A technology of equiaxed grains and extrusion equipment, which is applied in the field of materials, can solve the problems of demanding deformation conditions, small processing sample size, and complex equipment technology, so as to improve the refining effect, increase the cumulative deformation, and refine Obvious effect

Active Publication Date: 2018-06-26
SHANGHAI JIAO TONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods of large plastic deformation have complex equipment and technology, high cost, and strict deformation conditions. Even if they are implemented under extreme conditions, the size of the processed samples is often small, and it is difficult to obtain practical engineering applications.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Orthogonal lamination extrusion equipment and application for preparing ultra-fine equiaxed grain aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the experiment, the 7075Al alloy obtained by casting was homogenized at 465°C for 24 hours, and then two-pass orthogonal lamination extrusion was carried out at 450°C using orthogonal lamination extrusion equipment. The 7075Al alloy after extrusion was at 470°C. Solid solution for 60min, and aging at 120℃ for 20h. The deformed 7075Al alloy grain type is uniform equiaxed grain, the grain size is less than 10 μm, the room temperature tensile strength is 650 MPa, and the elongation is about 13%.

Embodiment 2

[0029] In the experiment, the 2024Al alloy obtained by casting was homogenized at 490℃ for 48h, and then the orthogonal lamination extrusion equipment was used to carry out four passes of orthogonal lamination extrusion at 450℃. The 2024Al alloy after extrusion was at 500℃ After solid solution for 60min, water quenching at room temperature, aging for 6h at 190℃ The grain type of the deformed 2024Al alloy is uniform equiaxed crystal, and the grain size is less than 10μm. The alloy exhibits high plasticity in the tensile test at room temperature.

Embodiment 3

[0031] Orthogonal lamination extrusion equipment for preparing ultra-fine equiaxed grain aluminum alloy, its structure is as follows figure 1 As shown, it includes an upper indenter 1, a mold barrel 2 and a mold head 3. The middle of the mold barrel 2 is provided with a through hole with a square structure, and the side length is d. The upper indenter 1 and the mold head 3 have the same shape as the through hole. Matching, the composite material is placed in the through hole when in use, the upper pressing head 1 and the die head 3 are respectively placed on the upper and lower surfaces of the composite material and pressed.

[0032] In addition, a pit is provided on the die head 3, and the bottom of the pit is provided with a through hole communicating with the bottom. The length of the through hole is d / 2 of the side length of the through hole, and the width of the composite material after extrusion is d / 2. The thickness is less than or equal to d / 2 of the side length of the t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention relates to orthogonal lamination squeezing equipment for manufacturing superfine equiaxed grain aluminum alloy and an application of the orthogonal lamination squeezing equipment. The equipment and the application thereof are suitable for all deformable aluminum alloy. A traditional squeezing process is improved, the set of mold equipment capable of achieving multi-pass orthogonal lamination squeezing is designed, and the squeezing deformation direction of each pass is perpendicular to the squeezing direction of the last pass. Due to the fact that the deformable aluminum alloy is subjected to squeezing deformation in the multi-pass orthogonal lamination squeezing mold, a large amount of accumulated shear strain can be applied to the texture of the aluminum alloy, and therefore superfine equiaxed grains are obtained. As the number of the squeezing passes is increased, the accumulated deformation amount is increased, and the refining effect is also more remarkable. According to a method and the equipment, operation is easy, the equipment is simple, cost is low, and samples with large dimensions can be machined.

Description

Technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an orthogonal lamination extrusion equipment for preparing ultra-fine equiaxed grain aluminum alloy and its application. Background technique [0002] With the development of modern science and technology, the requirements for material performance in practical applications have become more stringent. Especially in high-end fields such as aerospace and weapon manufacturing, higher and higher requirements are put forward for the strong plasticity of structural materials. The strengthening theory of aluminum alloys mainly includes second phase strengthening, dislocation strengthening (work hardening), solid solution strengthening and fine-grain strengthening, of which only fine-grain strengthening can increase the strength and plasticity of the aluminum alloy. According to the classic Hall-Petch formula, when the grain size of the aluminum alloy decreases, the strength of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 陈哲刘钧汪明亮吴一陈东钟圣怡王浩伟
Owner SHANGHAI JIAO TONG UNIV