Method for preparing gradient structure metal material through incremental-cumulative ply rolling

A technology of cumulative stacking and gradient structure, which is applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of indistinct microstructure gradient distribution and cumbersome preparation process, and achieve good strength-toughness matching performance, improve The effect of production efficiency

Active Publication Date: 2021-05-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While taking advantage of the advantages of the rolling process, it also has the disadvantages of cumbersome preparation process and indistinct gradient distribution of microstructure.

Method used

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  • Method for preparing gradient structure metal material through incremental-cumulative ply rolling
  • Method for preparing gradient structure metal material through incremental-cumulative ply rolling
  • Method for preparing gradient structure metal material through incremental-cumulative ply rolling

Examples

Experimental program
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Effect test

preparation example Construction

[0031] refer to figure 1 , the specific steps of the preparation method of the present invention are as follows:

[0032] The first step: use aluminum alloy or copper alloy as the raw material sample1, the thickness of the raw material sample1 is 0.5mm ~ 2mm, the width is 100mm ~ 1200mm, and sample1 is subjected to heat treatment, the heat treatment temperature is 0.3 ~ 0.4Tm, and the time is 30min ~ 24h, Tm is the melting point of the processed metal material;

[0033] Step 2: Remove oxides and dirt with wire brush and acetone respectively, and treat the surface of each board to be bonded;

[0034] Step 3: Take 3 pieces of raw material sample1, place them in a rolling mill for rolling, and prepare the core layer to obtain sample2, and set the reduction to 50% to 80%;

[0035] Step 4: Place two processed plates on the upper and lower surfaces of the material obtained by stacking and rolling, and process them to the same size. At the same time, the four corners of the stacked...

Embodiment 1

[0039] Example 1: Preparation of 7-layer aluminum alloy plate with gradient structure

[0040] The first step: using aluminum alloy 1050 plate as raw material, the thickness of the raw material is 0.6mm, the width is 300mm, and annealed at 250°C for 2h in an annealing furnace.

[0041] Step 2: Remove oxides and dirt with a wire brush and acetone, respectively, and treat the surface to be bonded of the aluminum alloy sheet.

[0042] Step 3: Take 3 aluminum alloy plates, place them in a rolling mill at room temperature with a reduction of 60%, and roll them to prepare a core layer.

[0043] Step 4: Another two processed aluminum alloys are respectively placed on the upper and lower surfaces of the material obtained by stacking and rolling, and they are processed to the same size, and at the same time, they are fixed with rivets.

[0044] Step 5: rolling the stacked three-layer plates at a reduction of 60% at room temperature to obtain a 5-layer aluminum alloy plate with a gradi...

Embodiment 2

[0047] Example 2: Preparation of 9-layer gradient copper alloy sheet

[0048] Step 1: Take the copper alloy TU1 plate as the raw material, the thickness of the raw material is 1mm, and the width is 100mm, annealing in an annealing furnace at 400°C for 24h.

[0049] Step 2: Use steel wire brush and acetone to remove oxides and dirt respectively, and treat the surface to be bonded of TU1 sheet.

[0050] Step 3: Take 3 pieces of TU1 plates, anneal at 200° C. for 5 minutes before rolling, and then place them in a rolling mill at a reduction of 80% for rolling to prepare a core layer.

[0051] Step 4: Another two processed TU1 plates are respectively placed on the upper and lower surfaces of the material obtained by stacking and rolling, processed to the same size, and fixed with rivets at the same time.

[0052] Step 5: Roll the stacked three-layer plates at 200°C for 5 minutes before rolling with a reduction of 80% to obtain a 5-layer plate with a gradient structure.

[0053] Ste...

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Abstract

The invention provides a method for preparing a gradient structure metal material through incremental-cumulative ply rolling. The method comprises the steps of a) selecting five or more metal plates in the same specification, and carrying out heat treatment on the plates; b) treating to-be-combined surfaces of the plates obtained after heat treatment; c) carrying out ply rolling on three treated plates to serve as core layers; d) placing another two treated plates on the upper surface and the lower surface of the material obtained through ply rolling correspondingly and machining the two treated plates and the material obtained through ply rolling till the sizes of the two treated plates and the size of the material obtained through ply rolling are the same; e) rolling the three layers of plates stacked together so as to complete one time of incremental-cumulative ply rolling; and f) repeating the step d and the step e, and carrying out 3-5 times of incremental-cumulative ply rolling passes so as to obtain the required gradient structure plates. Through the incremental-cumulative ply rolling method, the refining degree gradient of the microstructure of the material from the surface layers to the cores is adjusted and controlled to be increased, and thus the material has high strength and good toughness.

Description

technical field [0001] The invention belongs to the technical field of metal material rolling, and relates to the rolling of metal gradient structure materials, in particular to a method for preparing gradient structure metal materials by incremental-cumulative stack rolling. Background technique [0002] Ultrafine-grained metal materials have received extensive attention from the academic community in the past few decades, and a large number of methods have been invented to prepare and study these materials. However, for ultrafine-grained metallic materials, the limitation is that the material has high strength and very low plasticity. In this context, improving the toughness of ultrafine-grained metal materials has become a hot issue for researchers. [0003] Gradient structure materials are an important branch of the development of ultrafine-grained metal materials. It has been confirmed that metal materials with gradient structures have excellent strength and good tough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00
CPCB21B1/38B21B47/00B21B2001/386
Inventor 李璟喻海良高海涛
Owner CENT SOUTH UNIV
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