Powdery alloy processing material in site by movable laser smelt-coating process

A technology of laser cladding and on-site processing, which is applied in the field of material science, can solve problems such as unstable performance, uneven composition, cracks, etc., achieve high hardness and strength, reduce the melting point of alloys, and have broad development prospects

Inactive Publication Date: 2006-11-01
SHENYANG DALU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its original process characteristics, these mixed powders cannot fully meet and apply to the process requirements of laser cladding of specific substrates, and there are still defects such as cracks, inclusions, pores, uneven composition, and unstable performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composition of the material may be: Cr: 15%; W: 5%; Mo: 8%; Fe: 3%; Al: 1%; Ti: 1.5%; Si: 1.2%; B: 0.8% ; Re: 0.6%; also contain at least one of the following elements: Co, C, N, Nb, Cu, Co, C, N, Nb, Cu, one of these material components or any combination thereof in the total amount The weight percentage in the powder is ≤ 2%; trace rare earth elements: Ce, Y, Hf are also added to the material, and the total amount is ≤ 1% of the total weight of the powder by weight percentage; Ni: the balance.

[0022] The mobile laser cladding on-site processing alloy powder material is prepared through the following processes: vacuum melting, atomization, and screening; the particle size of the material is 53-150 μm.

[0023] Apply this material to repair the rotor shaft diameter of C12-50 type 1# steam turbine in a thermal power plant of a zinc plant: the weight of the rotor is 6778kg, the maximum working temperature is 445°C, the working speed is 3000 rpm, the working medium i...

Embodiment 2

[0025] Cr: 25%; W: 10%; Mo: 4%; Fe: 0.5%; Al: 2%; Ti: 1%; Si: 2%; B: 0.2%; Re: 0.2%; others: balance. The balance also contains at least one of the following elements: Co, C, N, Nb, Cu; Co, C, N, Nb, Cu, one of these material components or any combination of them in the total amount The weight percentage is ≤ 2%; trace rare earth elements: Ce, Y, Hf are also added in the material, and the total amount is ≤ 1% of the total weight of the powder by weight percentage; Ni: the balance.

[0026] The mobile laser cladding on-site processing alloy powder material is prepared through the following processes: vacuum melting, atomization, and screening; the particle size of the material is 53-150 μm. A 5000W cross-flow high-pressure continuous CO2 laser is used to apply the materials mentioned above to carry out laser cladding and repair operations on the shaft diameter of an axial fan blade in a power company. (The inner hole of the counterweight of the axial fan is deformed due to wear...

Embodiment 3

[0028] Cr: 22%; W: 7%; Mo: 6%; Fe: 2%; Al: 0.4%; Ti: 2%; Si: 1%; B: 1%; Re: 1%; others: balance. The balance also contains at least one of the following elements: Co, C, N, Nb, Cu; Co, C, N, Nb, Cu, one of these material components or any combination of them in the total amount The weight percentage is ≤ 2%; trace rare earth elements: Ce, Y, Hf are also added in the material, and the total amount is ≤ 1% of the total weight of the powder by weight percentage; Ni: the balance.

[0029] The mobile laser cladding on-site processing alloy powder material is prepared through the following processes: vacuum melting, atomization, and screening; the particle size of the material is 53-150 μm. A 5000W cross-flow high-voltage continuous CO2 laser is used to apply the materials mentioned above to carry out laser cladding repair operation on the seriously damaged generator rotor shaft of a certain power plant. (The weight of the generator rotor shaft is 45 tons, which was seriously damage...

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Abstract

A movable field processing alloy powder material for the laser melting is to reinforce the nickel-base alloy using the below elements: Cr, W, Mo, Al, Ti, Co; also it can be added with the Co, C, N, Nb, Cu, B, Si and the minim rare-earth metal which can be the Ce, Y and the Hf. The invention has the high hardness, the strength and the low melting point, high wearing resistance. It has improved the cracking resistance, moldability, the stability and the uniformity of the laser melting layer. So it can repair the high temperature alloy, the carbon steel, the structural steel and the stainless steel by the laser melting.

Description

Technical field: [0001] The invention relates to material science, and in particular provides a mobile laser cladding on-site processing alloy powder material. Background technique: [0002] As an advanced coating technology, laser cladding has been rapidly promoted and applied since the 1970s with the continuous improvement of laser power and stability. Laser cladding is an advanced technology to obtain a high-performance surface coating that is firmly bonded to the substrate on the metal surface and has no pores, cracks and other defects. It can clad high melting point alloy materials on the surface of low melting point substrates, and also High-performance surface coatings can be prepared on low-cost substrates to replace a large number of advanced high-performance overall materials, saving precious metal materials and reducing component costs. [0003] At present, there are almost no special metal powders for laser cladding in the domestic and foreign markets. Most of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04
Inventor 陈江陈常义
Owner SHENYANG DALU LASER TECH
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