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A post-treatment method for hot-pressed sintered titanium diboride reinforced copper matrix composites

A copper-based composite material and hot-press sintering technology, which is applied in the post-processing field of hot-pressed sintered titanium diboride reinforced copper-based composite materials, can solve problems such as insufficient strengthening effect, and achieve increased strength and hardness, strength and elongation Improvement, conductivity and hardness enhancement effect

Active Publication Date: 2020-07-28
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a post-processing method for hot-pressing and sintering titanium diboride reinforced copper-based composite materials, which solves the problem of TiB prepared by the existing powder metallurgy method. 2 Reinforced phase agglomeration in reinforced copper matrix composites, resulting in insufficient strengthening effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1, Cu powder, TiH 2 Powder and B powder are mixed and pressed, then subjected to atmosphere protection high-temperature hot-press sintering to prepare TiB 2 - Cu composite material;

[0037] Among them, Cu powder, TiH 2 The mass ratio of powder and B powder is 203.70:4.52:1.95. Prepared TiB 2 -Cu composite material specification is Ф35mm×25mm.

[0038] Step 2, hot extrusion:

[0039] TiB obtained in step 1 2 The -Cu composite material was placed in a box-type resistance furnace and heated at 900°C for 25 minutes, and then put into an extrusion barrel for hot extrusion. During hot extrusion, the temperature of the extrusion barrel was kept at 350°C, and the extrusion ratio was 6.25.

[0040] Step 3, cold rolling:

[0041] To the TiB after step 2 thermal extrusion 2 The -Cu composite material is subjected to multi-pass cold rolling, and the deformation of the cold rolling is controlled to be 50%.

[0042] Step 4, electric pulse treatment:

[0043] To the Ti...

Embodiment 2

[0046] Step 1, Cu powder, TiH 2 Powder and B powder are mixed and pressed, then subjected to atmosphere protection high-temperature hot-press sintering to prepare TiB 2 - Cu composite material;

[0047] Among them, Cu powder, TiH 2 The mass ratio of powder and B powder is 203.70:4.52:1.95. Prepared TiB 2 -Cu composite material specification is Ф35mm×25mm.

[0048] Step 2, hot extrusion:

[0049] TiB obtained in step 1 2The -Cu composite material was placed in a box-type resistance furnace and heated at 910°C for 28 minutes, and then put into an extrusion barrel for hot extrusion. During hot extrusion, the temperature of the extrusion barrel was kept at 380°C, and the extrusion ratio was 8.51.

[0050] Step 3, cold rolling:

[0051] To the TiB after step 2 thermal extrusion 2 The -Cu composite material is subjected to multi-pass cold rolling, and the deformation of the cold rolling is controlled to be 60%.

[0052] Step 4, electric pulse treatment:

[0053] To the TiB...

Embodiment 3

[0056] Step 1, Cu powder, TiH 2 Powder and B powder are mixed and pressed, then subjected to atmosphere protection high-temperature hot-press sintering to prepare TiB 2 - Cu composite material;

[0057] Among them, Cu powder, TiH 2 The mass ratio of powder and B powder is 203.70:4.52:1.95. Prepared TiB 2 -Cu composite material specification is Ф35mm×25mm.

[0058] Step 2, hot extrusion:

[0059] TiB obtained in step 1 2 The -Cu composite material was placed in a box-type resistance furnace and heated at 950°C for 30 minutes, and then put into an extrusion barrel for hot extrusion. During hot extrusion, the temperature of the extrusion barrel was kept at 400°C, and the extrusion ratio was 12.3.

[0060] Step 3, cold rolling:

[0061] To the TiB after step 2 thermal extrusion 2 -Cu composite material is subjected to multi-pass cold rolling, and the deformation of cold rolling is controlled to be 75%.

[0062] Step 4, electric pulse treatment:

[0063] To the TiB after ...

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Abstract

The invention discloses a post-treatment method for a hot-pressing sintered titanium diboride reinforced copper-based composite. The method comprises the particular steps that the hot extrusion, coldrolling and electric pulse processing are sequentially carried out on the TiB2-Cu composite prepared by hot pressing sintering. According to the post-treatment method for the hot-pressing sintered titanium diboride reinforced copper-based composite, hot extrusion, cold rolling and electric pulse are cooperatively carried out on the composite, so that the electrical conductivity and hardness of thecomposite are improved, meanwhile the strength and elongation are improved as well, and the improvement effects are better than the effect of any single action of three methods.

Description

technical field [0001] The invention belongs to the technical field of copper-based composite materials, and in particular relates to a post-processing method for hot-pressing and sintering titanium diboride reinforced copper-based composite materials. Background technique [0002] Copper has been widely used in optoelectronics, aerospace, military and other fields due to its good plasticity and excellent electrical and thermal conductivity. However, the strength of pure copper is generally low, and it is difficult to meet some special service conditions, so the direct application range of pure copper is generally small. In order to meet the comprehensive needs of conductivity and mechanical properties in the industrial field, while trying to improve the strength and high temperature creep resistance of copper alloys, it is also necessary to ensure that its excellent electrical and thermal conductivity will not be reduced. In the copper matrix, adding a reinforcement phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08C22F3/00C22C1/05C22C9/00C22C32/00
CPCC22C1/05C22C9/00C22C32/0073C22F1/08C22F3/00
Inventor 梁淑华张小军姜伊辉张文曹飞
Owner XIAN UNIV OF TECH
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