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Method for laser cladding of copper alloy powder on surface of copper substrate

A laser cladding, copper alloy technology, applied in the direction of metal material coating process, coating, additive manufacturing, etc., can solve the problem of difficulty in forming molten pool, and achieve the effect of improving hardness, promoting firm bonding and reducing workload

Active Publication Date: 2021-03-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (2) In the application of high-speed laser cladding on the surface of copper alloy, there is still the problem that the molten pool is not easy to form due to the high reflectivity and good thermal conductivity of copper to laser

Method used

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  • Method for laser cladding of copper alloy powder on surface of copper substrate
  • Method for laser cladding of copper alloy powder on surface of copper substrate
  • Method for laser cladding of copper alloy powder on surface of copper substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0100] 1. The laser cladding device used in Examples 1-3 is the ZKZM-4000 laser cladding product produced by Xi'an Zhongke Zhongmei Co., Ltd., including optically coupled semiconductor lasers, chillers, cladding heads, powder feeders and other components . The formulation of the laser cladding powder used is shown in Table 1 below (mass percentage):

[0101] Table 1

[0102]

[0103]

[0104] The particle size range of the alloy material powder is 25-150 μm, and the sphericity is ≥80%.

[0105] 2. Pretreatment of copper-based workpieces

[0106] Polish the surface of the pure copper workpiece with a grinder and sandpaper to remove the surface oxide layer; and clean the surface of the pure copper workpiece with absolute alcohol or acetone to obtain a clean surface of the pure copper workpiece;

[0107] 3. Pretreatment of cladding alloy powder

[0108] The laser cladding powder needs to be dried before cladding, the drying temperature is 80-100°C, and the drying time i...

Embodiment 4-6

[0132] In order to verify the influence of the cladding head working angle on the cladding effect after powder feeding in the center, the cladding head working angle was changed, other conditions were the same as in Example 1, and the cladding results obtained by comparing different working angles were shown in Table 6 below. , corresponding to metallographic results such as Figure 7 shown.

[0133] Table 6

[0134] Example 4 Example 1 Example 5 Example 6 working angle 90 75 60 45 Cladding quality There are a few pores No pores and no cracks There are a few cracks cracked

Embodiment 7

[0136] This embodiment adopts a kind of laser cladding manufacturing preheating insulation device, which consists of such as image 3 , 4 The components shown in combination form a figure 1 , 2 style shown.

[0137] The preheating and heat preservation device is set on the cladding workbench of laser material addition. The preheating and heat preservation device has a heat preservation chamber, and a heating temperature control unit and a workpiece clamping unit are arranged in the heat preservation chamber. The top of the heat preservation chamber is opened to allow the laser to act on the On the additive material, a cover is provided at the opening. During laser work, the cover is open. When the laser operation is completed and heat preservation is required, the cover is closed.

[0138]The preheating and heat preservation device includes a heating temperature control unit, a copper-based workpiece clamping platform, an upper tank body, a lower tank body and thermal ins...

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Abstract

A method for laser cladding of copper alloy powder on the surface of a copper base comprises the following steps: (1) , using a polishing tool for polishing the surface of a copper base workpiece to remove a surface oxide layer; cleaning the surface of the copper-based workpiece by using a detergent to obtain a copper-based surface with a clean surface; (2), fixing the copper-based workpiece on aworking platform; and (3), carrying out high-speed laser cladding on the copper-based workpiece by using laser cladding powder through a high-speed laser cladding optical fiber laser device. The lasercladding powder comprises the following chemical components in percentage by weight: 0.01%-0.25% of C, 0.5%-3% of B, 1%-4% of Si, 012% of Cr, 0.5%-14% of Fe, 10%-50% of Cu, 30%-80% of Ni, wherein a powder particle size interval is 25-150 microns and a sphericity degree is more than or equal to 80%. The method has the advantages that for specific laser cladding powder, a transition layer, a pre-coating layer and the like do not need to be added before cladding, a desired cladding layer is directly obtained through single-layer cladding in the mode that powder is fed from the center and the working included angle of the cladding head is controlled, and the process is simplified.

Description

technical field [0001] The invention specifically relates to a method for laser cladding copper alloy powder on the surface of a copper substrate. Background technique [0002] As one of the earliest metal materials used by human beings, copper is the second largest non-ferrous metal in the world. It has high electrical conductivity, high thermal conductivity, high corrosion resistance, easy processing and good mechanical properties. Therefore, copper and copper alloys are used It is widely used in machinery manufacturing, transportation, construction, electrical, electronics and other industrial sectors, and made into various electronic materials and structural components. It is the key to the power industry, electronic information industry, aerospace, marine engineering, automobile industry and military industry. Materials are also important basic materials for the development of national economy and science and technology. The biggest feature of copper is its high electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/02C22C19/05C22C19/03C22C9/06B22F10/28B22F12/13B22F12/17B22F12/30B33Y40/10B33Y30/00
CPCC23C24/103C22C30/02C22C19/002C22C19/058C22C19/03C22C9/06B33Y40/10B33Y30/00
Inventor 谢宏斌王宏涛高铭余方攸同刘嘉斌
Owner ZHEJIANG UNIV
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