Nickel-based composite powder of laser cladding coating and method for preparing coating

A composite powder and laser cladding technology, applied in the field of nickel-based composite powder and preparation of coatings, can solve the problems of no cracks, insufficient hardness, etc., to improve the process forming performance, improve corrosion resistance, and no cracks. Effect

Inactive Publication Date: 2017-05-31
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] A wear-resistant and anti-corrosion iron-based laser cladding powder invented by Xu Hongyan, Guo Junfeng and others from Beikuang New Materials Technology Co., Ltd., but the hardness is less than 40HRC; Shan Zhongde, Advanced Manufacturing Technology Research Center of the General Academy of Mechanical Sciences, Sun Fuzhen and others invented an iron-nickel-based composite laser powder and a method of cladding the powder. The hardness is high, but it cannot be crack-free.

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  • Nickel-based composite powder of laser cladding coating and method for preparing coating
  • Nickel-based composite powder of laser cladding coating and method for preparing coating

Examples

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Effect test

Embodiment 1

[0023] The composition of the laser cladding nickel-based composite powder in this embodiment is as follows by weight percentage: C: 0.572%, Cr: 15.5%, Si: 3.1%, W: 2.1%, Fe: 32.4%, Mn: 0.3%, B: 2.45 %, Cu: 0.3%, Nb: 0.135%, and the balance is Ni.

[0024] The specific method for preparing the coating by laser cladding in the embodiment of the present invention is as follows:

[0025] Step 1: In manual mode, control the robot to aim the laser head at the surface of the workpiece. Before cladding, put the powder into the drying box and heat it to 150°C and keep it warm for 0.5h for drying treatment; degrease the surface of the workpiece, derusting treatment;

[0026] Step 2: Use synchronous coaxial powder feeding, that is, the powder feeding direction is consistent with the laser incident direction, and the powder is sent to the surface of the workpiece to be clad;

[0027] Step 3: Feed the nickel-based composite powder through coaxial powder feeding during laser cladding, an...

Embodiment 2

[0030] The composition of the laser cladding nickel-based composite powder in this embodiment is as follows by weight percentage: C: 0.648%, Cr: 15.9%, Si: 3.4%, W: 2.4%, Fe: 26.8%, Mn: 0.2%, B: 2.8 %, Cu: 1.0%, Nb: 0.09%, and the balance is Ni.

[0031] The method of preparing the coating is the same as in Example 1.

Embodiment 3

[0033] The composition of the laser cladding nickel-based composite powder in this embodiment is as follows by weight percentage: C: 0.724%, Cr: 16.1%, Si: 3.7%, W: 2.7%, Fe: 29.8%, Mn: 0.1%, B: 3.15% %, Cu: 1.5%, Nb: 0.015%, and the balance is Ni.

[0034] The method of preparing the coating is the same as in Example 1.

[0035] The components of comparative examples and the performance of the prepared coating are shown in table 1:

[0036] Table 1

[0037]

[0038]

[0039] It can be concluded from Table 1 that the B and Si elements in the nickel-based composite powder can improve the fluidity and wettability of the metal, obtain a well-formed coating on the surface, and have the function of slagging, and can also form borides, and the silicides can improve Coating hardness; Cr, W, C elements can form C 23 C 6 Type carbide and WC, these hard phases increase the hardness of the coating; Ni, Fe elements can form solid solutions, which can improve the strength and har...

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Abstract

The invention discloses nickel-based composite powder of a laser cladding coating and a method for preparing the coating. The composite powder comprises the following components by weight percent: 0.572% to 0.724% of C, 15.5% to 16.1% of Cr, 3.1% to 3.7% of Si, 2.1% to 2.7% of W, 26.8% to 32.4% of Fe, 0.1% to 0.3% of Mn, 2.45% to 3.15% of B, 0.3% to 1.5% of Cu and 0.015% to 0.135% of Nb, and the balance being Ni. The nickel-based composite powder of the laser cladding coating contains relatively high-content elements like Si and B, the elements have a slagging function and are preferentially fused together with oxygen in alloy powder and oxides on the surface of a workpiece, borosilicate with low melting point is generated, borosilicate covers the surface of a molten pool, and liquid metals are prevented from being excessively oxidized, so that the wetting ability of melt for a matrix metal is improved, the inclusion content and oxygen content in the cladding coating are decreased, and the technological shaping property of the cladding coating is improved.

Description

technical field [0001] The invention relates to a nickel-based composite powder for laser cladding coating and a method for preparing the coating, belonging to the technical field of laser cladding. Background technique [0002] Many engineering materials are prone to damage such as wear and fatigue on the surface of the material during the service process, which limits the use conditions and scope of the material to a certain extent and shortens the service life of the material. Laser cladding nickel-based alloys on the surface of carbon steel can greatly improve the surface properties of materials, and improve the surface hardness, wear resistance, and corrosion resistance of materials. [0003] As a new surface modification technology, laser cladding combines the advantages of surface cladding layer technology and composite material technology, and can make the material surface meet the requirements of high wear resistance and high corrosion resistance at a lower cost. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
CPCC23C24/103C22C19/056
Inventor 李瑞峰陈顺高张晓明郑启池祁凯
Owner JIANGSU UNIV OF SCI & TECH
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