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Laser cladding method for preparing high-quality nickel-based alloy coating on titanium metal surface

A nickel-based alloy, laser cladding technology, applied in the field of surface modification, can solve the problems of large friction coefficient, poor wear resistance, low surface hardness of titanium metal, etc., to improve absorption performance, dense organization, and improve interface fusion performance Effect

Active Publication Date: 2016-08-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low surface hardness, high friction coefficient and poor wear resistance of titanium metal, and to invent a laser cladding method for preparing high-quality nickel-based alloy coatings on the surface of titanium metal, so as to improve Wear resistance and other properties of titanium metal

Method used

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  • Laser cladding method for preparing high-quality nickel-based alloy coating on titanium metal surface
  • Laser cladding method for preparing high-quality nickel-based alloy coating on titanium metal surface
  • Laser cladding method for preparing high-quality nickel-based alloy coating on titanium metal surface

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 -4 shown.

[0025] 98 grams of F101 nickel-based self-fluxing alloy powder (available directly on the market, the same below), lanthanum oxide (La 2 o 3 ) powder (can be purchased directly from the market, the same below), put it in a ball mill and mix evenly, take it out and dry it, and press it into a tablet on a press (thickness is about 0.7 mm, and the maximum compressible thickness is 1mm). Place the pressed sheet on the cleaned titanium surface, and use YLS-6000 fiber laser for laser cladding. The process parameters are: laser power 1.8KW, scanning speed 420mm / min, spot diameter 2mm. That is to obtain a high-quality nickel-based alloy coating on the surface of titanium metal.

[0026] The coating structure that this embodiment obtains is compact ( figure 1 ), the interface is tightly combined ( figure 2 ), the coating structure is uniform and dense dendrites ( figure 2 , image 3 ), the hardness of the transition zone between the coatin...

Embodiment 2

[0028] 97 grams of F101 nickel-based self-fluxing alloy powder, lanthanum oxide (La 2 o 3 ) powder 3 grams, put it in a ball mill and mix evenly, take it out and dry it, and press it into a tablet (thickness is about 0.7 mm, and the maximum compressible thickness is 1 mm). Place the pressed tablet on the cleaned titanium surface, and use YLS-6000 fiber laser is used for laser cladding, the process parameters are: laser power 1.8KW, scanning speed 420mm / min, spot diameter 2mm. That is to obtain a high-quality nickel-based alloy coating on the surface of titanium metal.

[0029] The coating structure that this embodiment obtains is compact (with figure 1 similar), the interface is tightly combined (with figure 2 Similar), its average hardness is HV644.

Embodiment 3

[0031] 99 grams of F101 nickel-based self-fluxing alloy powder, lanthanum oxide (La 2 o 3 ) powder 1 gram, put it in a ball mill and mix it evenly, take it out and dry it, and press it into a tablet (thickness is about 0.7 mm, and the maximum compressible thickness is 1 mm). Place the pressed tablet on the cleaned titanium surface, and use YLS-6000 fiber laser is used for laser cladding, the process parameters are: laser power 1.8KW, scanning speed 420mm / min, spot diameter 2mm. That is to obtain a high-quality nickel-based alloy coating on the surface of titanium metal.

[0032] The coating structure that this embodiment obtains is compact (with figure 1 similar), the interface is tightly combined (with figure 2 Similar), its average hardness is HV640.

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Abstract

A laser cladding method for preparing a high-quality nickel-based alloy coating on the surface of titanium metal is characterized in that it consists of two steps of prefabrication of a mixed powder compacted sheet and laser cladding treatment. The prefabrication of the mixed powder compacted tablet means that the nickel-based self-fluxing alloy powder and the lanthanum oxide powder are firstly mixed uniformly by a ball mill, then dried, and finally pressed into a tablet on a press. The laser cladding treatment refers to placing the pressed sheet on the cleaned titanium surface, and then performing laser cladding processing. By adding lanthanum oxide (La2O3), the invention improves the absorption performance of the nickel-based coating powder on laser heat, and improves the interface fusion performance of the coating and the substrate. The cladding process of the present invention has excellent performance, dense coating structure, good interface bonding, and the hardness of the transition zone between the coating and the substrate changes continuously in a gradient, realizing a "soft landing" from the coating to the substrate, and the hardness of the coating is HV642.86 higher than that of the substrate The hardness HV350 is significantly improved.

Description

technical field [0001] The invention relates to the field of surface modification, in particular to a laser surface cladding process for preparing a high-quality nickel-based alloy coating on the surface of titanium metal. Background technique [0002] Titanium has the advantages of high specific strength, excellent corrosion resistance, and good biocompatibility, and has been widely used in aerospace, weaponry, and civil industries. However, its low hardness, large friction coefficient and poor wear resistance limit its full performance. [0003] Nickel-based self-fluxing alloy has good heat resistance, oxidation resistance, corrosion resistance and wear resistance, and its price is moderate, and its composition design is wide. It is one of the most widely used wear-resistant coating materials. Therefore, preparing a high-quality nickel-based alloy coating on the surface of titanium metal is an effective way to improve the wear resistance of titanium metal. [0004] Laser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/03
Inventor 许晓静何星华陶俊王宏宇戈晓岚吴桂兰刘庆辉
Owner JIANGSU UNIV
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