Preparation technology of intermetallic compound based ceramic composite coating on surface of titanium alloy

A surface metal and ceramic composite technology, applied in the direction of metal material coating process, coating, etc., to achieve the effect of improving content and distribution, and superior performance

Active Publication Date: 2014-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the selection of cladding materials and cladding systems is very critical for the surface modification of titanium alloy materials, and there are few reports on the laser cladding of Ti / Al / Si and hard ceramic phases on the surface of titanium alloys.

Method used

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  • Preparation technology of intermetallic compound based ceramic composite coating on surface of titanium alloy
  • Preparation technology of intermetallic compound based ceramic composite coating on surface of titanium alloy
  • Preparation technology of intermetallic compound based ceramic composite coating on surface of titanium alloy

Examples

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Embodiment 1

[0050] An intermetallic compound-based ceramic composite coating on the surface of a titanium alloy is prepared by using Al / Ti metal powder and Si non-metallic powder mixed powder as cladding material and using laser cladding technology. The specific steps are as follows:

[0051] (1) Clean the surface of the Ti-6Al-4V titanium alloy sample, cut it into a metallographic sample of 10mm×10mm×10mm and a wear sample of 30mm×10mm×10mm by wire electric discharge, then clean and dry it for use ;

[0052] (2) Weigh the cladding material powder, and mix the powder evenly, the mass fraction of each component in the mixed powder is Ti50%, Al40%, Si10%, (abbreviated as 50Ti-40Al-10Si);

[0053] (3) Make the cladding material mixed powder into a paste with water glass solution. In the water glass solution, the volume ratio of water glass to water is 1:3. The amount of water glass solution added is 1 g of cladding material powder. 8 drops, and then evenly coat the surface of the titanium a...

Embodiment 2

[0057] The mass fraction of each component in the cladding material mixed powder was adjusted to 40% Ti, 45% Al, and 15% Si, and the preparation method was the same as in Example 1. The X-ray diffraction pattern of the laser cladding sample obtained in this embodiment is shown in Figure 1b .

Embodiment 3

[0059] The mass fraction of each component in the cladding material mixed powder is adjusted to 50% Ti, 35% Al, and 15% Si, and the preparation method is the same as in Example 1. The X-ray diffraction pattern of the laser cladding sample obtained in this embodiment is shown in Figure 1c .

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Abstract

The invention discloses a preparation technology of an intermetallic compound based ceramic composite coating on the surface of a titanium alloy. The preparation technology comprises the following steps of: (1) uniformly mixing cladding material powder, preparing mixed powder into paste with a water glass solution, uniformly coating the surface of the titanium alloy with the paste with the coating thickness of 0.5-1.0mm, carrying out airing, and (2) carrying out laser cladding on the coating on the surface of the titanium alloy with the laser power of 800-1200W and the laser scanning speed of 2.5-7.5mm / s, and blowing argon for shielding with the shielding gas pressure of 0.2-0.4MPa, wherein a laser spot diameter is fixed at 4mm.The mixed cladding material powder comprises the following ingredients by mass percentage: 25-65% of Ti, 20-60% of Al, 5-30% of Si and 0-3% of Y2O3, or 25-65% of Ti, 20-60% of Al, 5-30% of Si, 2-40% of B4C and 0-3% of Y2O3, or 25-65% of Ti, 20-60% of Al, 5-30% of Si, 5-40% of TiC, and 0-3% of Y2O3. The composite coating prepared by the technology can significantly increase microhardness of the titanium alloy, improve wear resistance of titanium alloy components, and extend an application scope of titanium alloy spare parts.

Description

technical field [0001] The invention relates to a preparation process of a wear-resistant composite coating on the surface of a titanium alloy, in particular to a laser cladding intermetallic compound-based ceramic composite wear-resistant coating on the surface of a titanium alloy and a preparation process thereof. Background technique [0002] Titanium alloys are widely used in aerospace, petrochemical and other industrial fields due to their advantages such as low density, high specific strength, and good corrosion resistance. However, the disadvantages of titanium alloy such as low hardness and poor wear resistance limit its further application. How to improve the hardness and wear resistance of titanium alloy and expand its application range has attracted the attention of material researchers at home and abroad. Surface modification of titanium alloy is the most economical and effective method to improve the surface hardness and wear resistance of titanium alloy. Lase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00C22C14/00C22C21/00C22C21/02C22C30/00C22C32/00
Inventor 于慧君张红霞陈传忠
Owner SHANDONG UNIV
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