Laser cladding method for nickel base alloy laser cladding powder

A laser cladding, nickel-based alloy technology, applied in metal processing equipment, metal material coating process, coating and other directions, can solve the problem of difficult to obtain cladding layer and cladding effect, difficult to apply to industrial production, complex process control, etc. problem, to achieve the effect of effective matching, reducing thermal stress, simple and flexible operation method

Inactive Publication Date: 2019-11-15
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are two obvious shortcomings in the above patents: first, the cladding efficiency is low, and its powder feeding speed is 1.2-1.5g / min; second, the thickness of the prefabricated cladding layer is relatively thin, which is 1.0-1.5mm
[0007] The inherent defect of the above-mentioned invention patent is that it is only suitable for laser cladding under the condition of low laser power (450w) and low scanning speed (6mm / s), and in order to effectively avoid the current situation that defects are easily generated under low laser power conditions. Groups of criss-cross longitudinal interlayer overlaps lead to complicated processes and complicated process control in practical applications, and it is difficult to obtain a relatively uniform cladding layer and cladding effect, which is difficult to apply to industrial production

Method used

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  • Laser cladding method for nickel base alloy laser cladding powder
  • Laser cladding method for nickel base alloy laser cladding powder
  • Laser cladding method for nickel base alloy laser cladding powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A nickel-based alloy powder laser cladding process, comprising the following steps:

[0038] (1) Select nickel-based alloy laser cladding powder for laser cladding, put the powder into an inert gas protection drying box for drying;

[0039] (2) Grinding the surface of the parts to be clad, and cleaning with ethanol to remove surface impurities;

[0040] (3) Put the powder into the coaxial powder feeder of the cladding equipment, and spray it on the surface of the part to be clad through the powder feeder, and use a semiconductor laser to spray on the surface of the part to be clad according to certain laser processing parameters and scanning methods Perform laser cladding.

[0041] In step (1), the chemical composition of the nickel-based alloy laser cladding powder is Cr: 20.03%, C: 0.05%, Si: 0.035%, Mn: 0.063%, Mo: 3.05%, Al: 0.56%, Ti: 0.89% %, Ni: 52.64%, Fe: 22.6% and a small amount of unavoidable impurities.

[0042] The purity of the nickel base alloy laser c...

Embodiment 2

[0051] A nickel-based alloy powder laser cladding process, comprising the following steps:

[0052] (1) Select nickel-based alloy laser cladding powder for laser cladding, put the powder into an inert gas protection drying box for drying;

[0053] (2) Grinding the surface of the parts to be clad, and cleaning with ethanol to remove surface impurities;

[0054] (3) Put the powder into the coaxial powder feeder of the cladding equipment, and spray it on the surface of the part to be clad through the powder feeder, and use a semiconductor laser to spray on the surface of the part to be clad according to certain laser processing parameters and scanning methods Perform laser cladding.

[0055] In step (1), the chemical composition of the powder is Cr: 17-21%, C: ≤0.08%, Si: ≤0.35%, Mn: ≤0.35%, Mo: 2.8-3.3%, Al: 0.2-0.8%, Ti: 0.65-1.15%, Ni: 55-58%, and the balance is Fe and unavoidable impurities.

[0056] In step (1), the purity of the powder is greater than 99%, and the partic...

Embodiment 3

[0061] A laser cladding method for nickel-based alloy laser cladding powder, comprising the following steps:

[0062] 1) Dry the laser cladding powder under the protection of nitrogen to remove trace moisture, improve the fluidity of the powder, and effectively avoid the increase of oxygen content in the powder; the drying temperature is 90°C, and the drying time is 6 hours; end After that, continue to pass cold nitrogen gas to cool down, and take it out after the temperature is lower than 35°C.

[0063] 2) Grinding the surface of the parts to be clad and cleaning with acetone to remove surface stains and impurities;

[0064] 3) Coat the laser cladding powder on the surface of the part to be clad, and use a semiconductor laser to perform laser cladding under the protection of nitrogen according to the set laser cladding parameters and scanning mode, and the nitrogen flow rate is 8L / min.

[0065] In step 1), the nickel-based alloy laser cladding powder includes the following c...

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Abstract

The invention relates to a laser cladding method for nickel base alloy laser cladding powder. The laser cladding method includes the following steps that firstly, the laser cladding powder is dried under the shield of inertia gas; secondly, the surface of a part to be subjected to cladding is ground, and cleaning liquid is used for cleaning; thirdly, and the laser cladding powder is sprayed on thesurface of the part to be subjected to cladding, and a laser device is used for conducting laser cladding according to set laser cladding parameters and a set scanning manner. Compared with the priorart, the laser cladding method is used for drying the powder under the shield of the inertia gas, water in the powder can be effectively reduced, fluidity of the powder is improved, and the powder sending uniformity is ensured. By means of the laser cladding method, defects of cladding layer cracking, base body deformation and the like can be reduced, and the quality of a cladding layer is improved; and the operation method is easy and flexible and can be suitable for various cladding environments.

Description

technical field [0001] The invention belongs to the technical field of laser cladding materials, and relates to a laser cladding method of nickel-based alloy laser cladding powder Background technique [0002] As a big manufacturing country, our country has a huge amount of electromechanical products, and remanufacturing is one of the best ways to recycle the resources of electromechanical products. The remanufacturing industry has begun to take shape, and a remanufacturing industry development model with the main technical characteristics of "dimension recovery and performance improvement" has been initially formed. In the development process of the remanufacturing industry, high-end and intelligent production practices are constantly emerging. As a key technology for remanufacturing, laser cladding technology is widely used in the field of remanufacturing. Laser cladding technology is used for batch repair and performance upgrade. The obtained products can reach or even s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05B22F1/00
CPCC23C24/103C22C19/058C22C19/055C22C19/056B22F1/142
Inventor 吴文恒朱德祥杨启云张亮卢林龙倩蕾吴凯琦倪晓晴宋佳
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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