Copper/high-carbon steel composite material as well as special V-shaped gas protection cover, laser-assisted preparation method and application thereof

A composite material, high carbon steel technology, applied in laser welding equipment, metal rolling, manufacturing tools, etc., can solve the problems that restrict the mass production and application of copper/high carbon steel composite strips, large rolling deformation, and large restrictions Mass production, etc.

Active Publication Date: 2022-04-08
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of deformation required for rolling and compounding is relatively large, which is currently limited to copper/low carbon steel composite materials
For copper and high-carbon steel with large plasticity differences, on the one hand, high-carbon steel is difficult to deform, and on the other hand, the deformation coordination of the two is poor, so it is difficult for the two to achieve interface bonding directly through rolling, which restricts the copper/high-carbon steel Mass production and application of composite strips
In order to realize the rolling composite of copper/high carbon st...

Method used

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  • Copper/high-carbon steel composite material as well as special V-shaped gas protection cover, laser-assisted preparation method and application thereof
  • Copper/high-carbon steel composite material as well as special V-shaped gas protection cover, laser-assisted preparation method and application thereof
  • Copper/high-carbon steel composite material as well as special V-shaped gas protection cover, laser-assisted preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 2 As shown, a special V-shaped gas shield for copper / high carbon steel composite materials, including a V-shaped shell 3 surrounded by a base plate 1, a cladding plate 2 and side plates;

[0054] The outer walls of the base plate 1 and the cladding plate 2 are provided with arc-shaped grooves adapted to the roll 4;

[0055] The upper limit roller 5 and the lower limit roller 6 are arranged on the inlet end 15 of the V-shaped shell 3 close to the cover plate 2, and the gap between the upper limit roller 5 and the lower limit roller 6 is the copper strip inlet 7 ;

[0056] The V-shaped housing 3 is provided with a left limit wheel 8 and a right limit wheel 9 on the inlet end 15 close to the base plate 1; between the left limit wheel 8 and the right limit wheel 9 is high carbon steel Take entrance 10;

[0057] The inlet end 5 is provided with a baffle 11 close to the lower limit roller 6;

[0058] Below the baffle 11 is a laser irradiation window 12;

...

Embodiment 2

[0066] A laser-assisted preparation method of a copper / high carbon steel composite material, comprising the following steps: cleaning and polishing the surface to be bonded of a copper strip with a thickness of 0.3 mm and a high carbon steel strip with a thickness of 1.2 mm, and the laser energy density is 120 W / mm 2 , the laser irradiation angle is 15°, the angle between the copper strip and the high carbon steel strip is 45°, the laser spot size is width×length=3×10 mm, the rolling deformation is 2%, and the rolling speed is 25 mm / s, the nitrogen flow rate was 5 L / min. Rolling deformation forms an eddy current zone at the interface of the molten layer, and then produces a copper-steel transition layer at a local location, and finally obtains a copper / high-carbon steel composite strip with a well-bonded interface. The microstructure of the bonding interface after rolling is as follows: Figure 6 As shown, there is a transition layer at the local position of the bonding int...

Embodiment 3

[0068] A laser-assisted preparation method of a copper / high carbon steel composite material, comprising the following steps: cleaning and polishing the surface to be bonded of a copper strip with a thickness of 0.3 mm and a high carbon steel strip with a thickness of 1.2 mm, and the laser energy density is 120 W / mm 2 , the laser irradiation angle is 15°, the angle between the copper strip and the high carbon steel strip is 45°, the laser spot size is 3×10 mm, the rolling deformation is 2%, the rolling speed is 20 mm / s, and the nitrogen flow rate is 5 L / min, so that the surface of the high-carbon steel strip at the interface to be bonded produces a molten layer with a thickness of 200 μm. The microstructure of the bonding interface after rolling is as follows: Figure 7 As shown, there is a transition layer at the local position of the bonding interface, without holes, and the bonding is good.

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Abstract

The invention discloses a V-shaped gas protection cover special for a copper/high-carbon steel composite material. The V-shaped gas protection cover comprises a V-shaped shell (3) defined by a base plate (1), a covering plate (2) and side plates. The included angle between the copper strip and the high-carbon steel strip is 30-45 degrees. The invention further discloses the copper/high-carbon steel composite material, a laser-assisted preparation method of the copper/high-carbon steel composite material and application of the copper/high-carbon steel composite material in conductive springs and/or precision gaskets. According to the method, a melting layer is formed, dependence of copper/high-carbon steel rolling compounding on deformation is remarkably reduced, interface bonding of copper/high-carbon steel can be achieved under the extremely small rolling deformation, the problem of poor deformation coordination is avoided, an eddy current area is generated in the local position of the melting layer under the rolling effect, and the deformation coordination is improved. Further, a wave-shaped interface or a copper-steel transition layer is formed at the local position of the interface, which is similar to an explosive cladding transition layer, so that the interface bonding effect can be further enhanced.

Description

technical field [0001] The invention relates to a copper / high-carbon steel composite material, a special V-shaped gas shield, a laser-assisted preparation method and its application, and belongs to the technical field of metallurgical materials. Background technique [0002] Copper / steel composite materials have the advantages of both copper and steel, and are widely used in petrochemical, nuclear energy, bearings, electrical equipment and other fields. At present, the preparation methods of copper / steel composite materials mainly include explosive welding, diffusion welding, and rolling compounding. Among the above methods, the rolling compounding efficiency is high, and composite materials with stable performance and uniform thickness can be continuously produced, which has good application prospects and is the future development trend. However, due to the high deformation resistance, poor plasticity and weldability of high-carbon steel, it is difficult to directly prepar...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B15/00B23K26/12B23K26/21
CPCY02P10/20
Inventor 李振兴陈金山王章忠朱帅帅张保森毛向阳陶学伟
Owner NANJING INST OF TECH
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