Method for carrying out laser-cladding on high-hardness nickel-based alloy material in large area

A technology of laser cladding and nickel-based alloys, which is applied in metal material coating technology, laser welding equipment, metal processing equipment, etc., can solve problems such as cracks, cracks, and pores, and achieve performance enhancement and reduction in corrosion resistance. Dilution rate, effect of life improvement

Active Publication Date: 2012-05-23
NINGBO SIASUN ROBOT TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for large-area laser cladding of high-hardness and wear-resistant nickel-based alloy materials to solve a series of problems in traditional surface treatment technologies and the cracking of existing laser cladding high-hardness nickel-base alloys Problems, especially when the cladding area is large and the thickness is above 1mm, defects such as cracks and pores are very easy to occur

Method used

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  • Method for carrying out laser-cladding on high-hardness nickel-based alloy material in large area
  • Method for carrying out laser-cladding on high-hardness nickel-based alloy material in large area
  • Method for carrying out laser-cladding on high-hardness nickel-based alloy material in large area

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Embodiment 1

[0055] In order to solve the wear and corrosion problem of a nuclear power plant pump shaft sleeve (material 1Cr18Ni9Ti, size ￠240×200mm, wall thickness 25mm), it was decided to use the present invention to coat the outer peripheral surface of the shaft sleeve with a high hardness, wear-resistant and corrosion-resistant nickel-based alloy coating. Processing, as follows:

[0056] 1) The laser processing technology is: laser power 2.5KW, scanning speed 180mm / min, spot diameter 3.0mm, overlap rate 40%, cladding thickness 2.0mm, cladding powder material is Ni60A.

[0057] 2) The heat treatment method is as follows: the workpiece preheating temperature is 300°C, the heating time is 2 hours, the heating and holding temperature is 300°C±20°C during the cladding process, and immediately after the processing is completed, it is placed in a resistance furnace with a furnace temperature of 200°C±20°C for 5 hours Keep warm and slowly cool to room temperature with the furnace.

[0058] I...

Embodiment 2

[0068] The difference from Example 1 is:

[0069] The material of a punch is H13 steel. In order to improve the high temperature wear resistance and cold and heat fatigue performance of the punch, the surface of the punch is strengthened by laser cladding using the present invention:

[0070] 1) Laser power 6.0KW, scanning speed 800mm / min, spot diameter 5.0mm, overlap rate 30%, cladding thickness 1.0mm, cladding powder material is Ni60A;

[0071] 2) The preheating temperature of the workpiece is 200°C, and the heating time is 1 hour; during the cladding process, the heating and heat preservation is 300°C±20°C; immediately after the processing, the workpiece is placed in a furnace temperature of 200°C±20°C for 3 hours of heat preservation and slow cooling with the furnace to room temperature.

[0072] Such as Figure 4 As shown, the coating structure is a typical rapid solidification structure with fine and dense grains, and the cladding layer forms a good metallurgical bond ...

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Abstract

The invention belongs to the field of material surface engineering and more particularly relates to a method for carrying out cladding on a high-hardness wear-resistant anti-corrosion nickel-based alloy material on a metal substrate E in a large area by applying a laser cladding technology, solving the problem of cracks generated in the laser cladding process of the high-hardness wear-resistant nickel-based alloy, in particular the cladding defects, such as cracks with the thickness of more than 1mm, pores and the like during large-area cladding. According to the invention, the high-hardness nickel-based alloy powder material is cladded on the surface of the metal substrate in the large area to form a high-hardness wear-resistant anti-corrosion nickel-based alloy coating by applying the laser cladding technology and adopting a scientific and reasonable process method. According to the method disclosed by the invention, stability and consistency of laser cladding are foundationally ensured, defects, such as cracks, pores, impurities can be prevented from generating, heat affected regions of the substrate are reduced, dilution rate is reduced, the high-wear-resistance anticorrosion nickel-based alloy coating with firm metallurgical bonding and fine and compact grains is obtained and has the hardness reaching 58-63HRC, and the service life of the processed workpiece can be prolonged by more than 1-2 times.

Description

Technical field: [0001] The invention belongs to the field of material surface engineering, and in particular relates to a method for cladding high-hardness, wear-resistant and corrosion-resistant nickel-based alloy materials on a metal substrate in a large area by applying laser cladding technology. Background technique: [0002] Material surface treatment is an important means of material surface modification and new material preparation, and all countries in the world attach great importance to it. With the development of modern industry, the requirements for surface modification and optimization of materials are increasing day by day. The national 863 high-tech plan has regarded the development of new technologies for material surface treatment as an important field of future development from the very beginning. Among the many surface treatment technologies, laser cladding technology is an emerging advanced material surface treatment technology, and with the continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 于恩洪曲道奎邢飞曲玉华殷德洋
Owner NINGBO SIASUN ROBOT TECH CO LTD
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