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Iron-based composite powder high in chromium content for laser cladding

A technology of composite powder and laser cladding, which is applied in the coating process and coating of metal materials to achieve the effect of improving smoothness and brightness, preventing electrochemical corrosion, and combining well

Active Publication Date: 2014-04-30
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides an iron-based composite powder containing high chromium content for laser cladding, to solve the defects generated during laser cladding self-fluxing alloy powder, and realize the application of laser cladding

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] Such as figure 1 as shown, figure 1 It is a schematic diagram of the composition ratio of the iron-based composite powder containing high chromium content for laser cladding provided by the present invention. The iron-based composite powder is composed of Cr 3 C 2 , Cr and Fe compounds, and Ni, Mo, Si and B elements. Wherein, the mass percentage of each element in the iron-based composite powder is: Cr: 38-40%; C: 4.2-4.5%; Ni: 3-5%; Mo: 0.05-0.08%; Si: 0.8-1.02%; B: 1.2-1.78%; the rest is Fe. The particle size of the iron-based composite powder is between +140 mesh and -325 mesh.

[0027] For the above-mentioned iron-based composite powder with high chromium content used for laser cladding, the analysis of th...

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Abstract

The invention discloses iron-based composite powder high in chromium content for laser cladding. The iron-based composite powder high in chromium content for laser cladding is composed of the chemical compound of Cr3C2, Cr and Fe, Ni, Mo, Si and B. The iron-based composite powder high in chromium content for laser cladding comprises, by mass, 38%-40% of Cr, 4.2%-4.5% of C, 3%-5% of Ni, 0.05%-0.08% of Mo, 0.8%-1.02% of Si, 1.2%-1.78% of B and the balance Fe. The particle size of the iron-based composite powder is between +140 meshes and -325 meshes. The iron-based composite powder is high in carbon content and chromium content, the hardness of a coating can be effectively improved, requirements of the laser cladding technology of iron-based base materials such as carbon steel and stainless steel can be met, a cladding layer of a sample of the iron-based composite powder is free of cracks and macroscopic pores, all the components are distributed evenly, the hardness of the iron-based composite powder can reach HV0.21000 and is five times that of a base body, the corrosion resistance of the iron-based composite powder cladding layer is improved due to the high chromium content, and the iron-based composite powder is suitable for normal temperature, high temperature, abrasion resistance and corrosion resistance working conditions.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to an iron-based composite powder with high chromium content for laser cladding. Background technique [0002] Laser surface modification technology has been widely used to improve the microstructure and composition of the surface of parts to improve their wear resistance, corrosion resistance, oxidation resistance and other properties. As one of the most important technologies in the field of laser surface modification, laser cladding technology is not restricted by the matrix material, and is an economical and effective means to improve the surface properties of materials. The alloy powder forms a complex physical and chemical process and rapid solidification process with the surface of the substrate, forming a dense metallurgical coating on the surface of the substrate. Compared with traditional surface coating technologies, such as thermal spraying, plasma cladding and o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C24/10
Inventor 林学春王奕博赵树森高文焱周春阳刘发兰
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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