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Iron-cobalt-based composite alloy powder for laser cladding and laser cladding method thereof

A technology of laser cladding and composite alloy, applied in the field of composite alloy powder and alloy powder for laser cladding, to achieve the effects of good corrosion resistance, good coating formation and good metallurgical bonding

Active Publication Date: 2018-10-02
山东泰利先进制造研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the shortcomings of existing composite powders for laser cladding, the present invention provides an iron-cobalt-based composite alloy powder for laser cladding and a laser cladding method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An iron-cobalt-based composite alloy powder for laser cladding, consisting of 23wt% Fe, 2wt% ZrO 2 , 75wt% cobalt-based base powder composed of 0.6wt% C, 14wt% Cr, 2.5wt% B, 3wt% Mo, 3.2wt% NbC, 2.8wt% CaF 2 and 73.9 wt% Co composition.

[0034] A laser cladding method, comprising the steps of:

[0035] 1) Aim the laser head of the semiconductor laser at the surface of the workpiece to be clad;

[0036] 2) The above-mentioned alloy powder for cladding is uniformly and continuously fed to the surface of the workpiece aligned with the laser head, and is conveyed in a synchronous lateral manner, and the sending speed of the alloy powder is 100g / min;

[0037] 3) The laser emits laser light to scan the surface of the workpiece to melt the alloy powder for cladding. The scanning speed of the laser is 480mm / min to form a cladding coating on the surface of the workpiece. The output power of the laser is 2000W, and the diameter of the laser spot is 3mm , keeping the powder fe...

Embodiment 2

[0040] An iron-cobalt-based composite alloy powder for laser cladding, consisting of 26wt% Fe, 2.8wt% ZrO 2 , 71.2wt% cobalt-based base powder composed of 0.8wt% C, 15wt% Cr, 3.5wt% B, 3.7wt% Mo, 3.5wt% NbC, 3.5wt% CaF 2 and 70wt% Co composition.

[0041] A laser cladding method, comprising the steps of:

[0042] 1) Aim the laser head of the semiconductor laser at the surface of the workpiece to be clad;

[0043] 2) Send the above-mentioned alloy powder for cladding evenly and continuously to the surface of the workpiece aligned with the laser head, and adopt a synchronous lateral delivery method, and the sending speed of the alloy powder is 180g / min;

[0044] 3) The laser emits laser light to scan the surface of the workpiece to melt the alloy powder for cladding. The scanning speed of the laser is 600mm / min to form a cladding coating on the surface of the workpiece. The output power of the laser is 2000W, and the diameter of the laser spot is 4mm , keep the powder feeding...

Embodiment 3

[0047] An iron-cobalt-based composite alloy powder for laser cladding, consisting of 30wt% Fe, 3.5wt% ZrO 2 , 66.5wt% cobalt-based base powder composed of 1.0wt% C, 17wt% Cr, 4.5wt% B, 4.5wt% Mo, 3wt% NbC, 4wt% CaF 2 and 66 wt% Co composition.

[0048] A laser cladding method, comprising the steps of:

[0049] 1) Aim the laser head of the semiconductor laser at the surface of the workpiece to be clad;

[0050] 2) Send the above-mentioned alloy powder for cladding evenly and continuously to the surface of the workpiece aligned with the laser head, and adopt a synchronous lateral delivery method, and the sending speed of the alloy powder is 200g / min;

[0051]3) The laser emits laser light to scan the surface of the workpiece to melt the alloy powder for cladding. The scanning speed of the laser is 540mm / min to form a cladding coating on the surface of the workpiece. The output power of the laser is 3000W, and the diameter of the laser spot is 4mm , keep the powder feeding amo...

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Abstract

The invention relates to an iron-cobalt-base composite alloy powder for laser cladding. The composite alloy powder comprises 23-30 wt% of Fe, 2-3.5 wt% of ZrO2 and the balance of cobalt-base basic powder. The composite alloy powder has higher contents of C, Si, B and other elements, and can effectively enhance the cladding layer hardness, so that the hardness of the obtained cladding layer can reach 55 HRC or above; the alloy powder has higher contents of Co and Cr, and thus, can effectively enhance the corrosion resistance of the cladding layer; and the element proportioning and cladding technique of the alloy powder for laser cladding are proper, so that the obtained coating has the advantages of favorable formability and no crack and forms favorable metallurgical bonding with the matrix.

Description

technical field [0001] The invention relates to an alloy powder for laser cladding, in particular to a composite alloy powder, and belongs to the technical field of laser surface strengthening. Background technique [0002] Laser cladding is an advanced surface modification technology. It uses high-energy laser beams to melt the metal-based materials added on the surface and the thin layer of the substrate to form a special function and low dilution rate and combine with the substrate. Metallurgically bonded coatings to obtain a technology with excellent properties such as wear resistance, corrosion resistance, oxidation resistance and high temperature resistance on the surface of metal workpieces. Laser cladding can prepare high-performance coatings on low-cost materials, so it can reduce energy consumption and save costs. Laser cladding forms a metallurgical bond. Compared with the conventional surface coating strengthening process, laser cladding has the following salien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/07B22F1/00
CPCB22F1/0003C22C19/07C23C24/103
Inventor 孙军强邵东强单忠德孙福臻刘阳
Owner 山东泰利先进制造研究院有限公司