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In-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite and preparation method and application thereof

A copper-based composite material and multi-phase ceramic technology, applied in transportation and packaging, metal processing equipment, coatings, etc., can solve the problems of spot welding electrode deformation, the reinforcing phase of the composite material cannot continue to play a reinforcing role, etc., to achieve life expectancy Improved, high wear resistance effect

Inactive Publication Date: 2018-06-01
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, single-phase ceramics or multi-phase ceramics have been used as a reinforcing phase to form a copper-based composite material with a surface-coated reinforcing phase. This type of material improves the wear resistance of welding electrode materials to a certain extent, but the use process of spot welding electrodes It will be deformed and needs to be ground. Once the spot welding electrode is ground, the reinforcement phase of the composite material will be damaged and it will not be able to continue to exert its original reinforcement effect.

Method used

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  • In-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite and preparation method and application thereof
  • In-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite and preparation method and application thereof
  • In-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite and preparation method and application thereof

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preparation example Construction

[0036] The invention provides an in-situ synthesis of chromium boride-zirconium boride (hereinafter referred to as CrB 2 -ZrB 2 Represent) the preparation method of multiphase ceramic reinforced copper-based composite material, comprises the following steps:

[0037] 1) Carry out ball milling with chromium simple substance, zirconium simple substance and boron simple substance, obtain CrB 2 -ZrB 2 Multiphase ceramic precursor;

[0038] 2) In the CrB 2 -ZrB 2 Electroless nickel plating is performed on the surface of the multiphase ceramic precursor to obtain nickel wetting enhancement particles;

[0039]3) Mixing and ball milling the nickel wetting enhancing particles and the copper source to obtain a ball milling mixture;

[0040] 4) cold pressing the ball-milled mixture to obtain a compact;

[0041] 5) Sintering the compact in an oxygen-free atmosphere to obtain a sintered body;

[0042] 6) Forging the sintered body to obtain in-situ synthesized CrB 2 -ZrB 2 Composi...

Embodiment 1

[0080] Weigh 10g of Cr powder, Zr powder and B powder (the molar ratio of Cr powder, Zr powder and B powder is 1:1:4, the particle size is 200 mesh, and the purity is ≥99.99%) for ball milling, and the ball milling parameter is a rotating speed of 350r / min , The ball milling time is 12 hours, the ball-to-material ratio is 10:1, the material of the balls and the spherical tank is alumina, the diameter of the balls is 5mm, the ball milling process is completed under the protection of argon, and the purity of the argon is greater than 99.9%. Put the ball-milled mixed powder into an electroless nickel plating solution with a pH of 9, stir the solution with a magnetic stirrer until no bubbles are generated at a temperature of 40°C, then filter and wash with deionized water until neutral, and place in the air Dry naturally for later use. Take 0.5g of the dried ball-milled powder, and mix it with 49.5g of pure copper powder with a particle size of 200 mesh at a ball-milling speed of ...

Embodiment 2

[0084]Weigh 10g of Cr powder, Zr powder and B powder (the molar ratio of Cr powder, Zr powder and B powder is 1:1:4, the particle size is 200 mesh, and the purity is ≥99.99) for ball milling. The ball milling parameters are 400r / min, The ball milling time is 18 hours, the ball-to-material ratio is 20:1, the material of the balls and the spherical tank is alumina, and the diameter of the balls is 5mm. The ball milling process is completed under the protection of argon gas, and the purity of the argon gas is greater than 99.9%. Put the ball-milled mixed powder into an electroless nickel plating solution with a pH value of 9.5, and stir the solution with a magnetic stirrer at a temperature of 45°C until no bubbles are generated, then filter and wash with deionized water until neutral, and place in air Dry naturally in medium. Take 0.5g of dried ball-milled powder, and mix it with 49.5g of pure copper powder with a particle size of 200 mesh at a ball-milling speed of 150r / min, a b...

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Abstract

The invention provides an in-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite and a preparation method of the in-situ synthesis chromium diboride-zirconium diboride multiphase ceramic reinforced copper-based composite. According to the preparation method, chromium elementary substance, zirconium elementary substance and boron elementary substance are ball milled, and then a CrB2-ZrB2 multiphase ceramic precursor is obtained; chemical nickel plating is conducted on the surface of the CrB2-ZrB2 multiphase ceramic precursor, nickel moistenedand reinforced particles are obtained and then mixed with a copper source, the mixture is ball milled, and the ball-milled mixture is obtained; cold pressing is conducted on the ball-mixed mixture, and a pressed blank is obtained; the pressed blank is sintered in an anaerobic atmosphere, and then a sintered body is obtained; and then forging and pressing are conducted, and then the in-situ synthesis CrB2-ZrB2 multiphase ceramic reinforced copper-based composite is obtained. The prepared in-situ synthesis CrB2-ZrB2 multiphase ceramic reinforced copper-based composite is high in hardness, and the hardness is not influenced by coping. The invention further provides the application of the in-situ synthesis CrB2-ZrB2 multiphase ceramic reinforced copper-based composite, wherein the in-situ synthesis CrB2-ZrB2 multiphase ceramic reinforced copper-based composite is used as a spot-welding electrode material.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, in particular to an in-situ synthesized CrB 2 -ZrB 2 Multiphase ceramic reinforced copper matrix composite material and its preparation method. Background technique [0002] Resistance spot welding is inseparable from the automobile production process. The production of passenger cars requires 3,000 welding points / car, and the production of cars requires 7,000-12,000 points / car; the cost of spot welding is calculated at 5 cents, and the spot welding cost of passenger cars reaches 150 US dollars, the spot welding cost of a car reaches 350-600 US dollars, accounting for 1 / 2-3 / 4 of the vehicle production cost, which prompts people to continuously study new spot welding electrode materials to reduce the cost of spot welding in the automobile production process . [0003] During the spot welding process, the spot welding electrode will inevitably undergo plastic deformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00C22C32/00B22F1/02B22F3/02B22F3/10B22F3/17
CPCC22C1/0425C22C1/05C22C9/00C22C32/0073B22F3/02B22F3/1007B22F3/17B22F2998/10B22F1/17B22F1/0003
Inventor 罗平董仕节汤臣张艳华蓝彬栩陈晨王义金胡东伟夏露肖瑶李智覃富城王冲杨祺邓宇鑫张海一晁飞扬王书文徐小涵张佳琪陈岗方泽成邵轩宇夏宇欣左雨菲丁文祥易少杰陈成
Owner HUBEI UNIV OF TECH
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