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Preparation method for titanium coating or titanium alloy coating

A titanium alloy and coating technology, which is applied in the field of coating preparation of titanium or titanium alloys, can solve the problems of substrate size requirements, high processing costs, and complicated preparation processes, etc., to solve the problem of substrate size, preparation conditions are not harsh, The effect of simple preparation process

Inactive Publication Date: 2013-02-27
HUNAN METALLURGY MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the process of spraying titanium coating, vacuum or inert gas protection is generally required, but this kind of production and processing costs are high, and there are requirements on the size of the substrate, and it cannot be sprayed on a large area, which limits its popularization and application.
In recent years, the rapid development of research on new spraying titanium coating technology, such as low-pressure plasma spraying, cold spraying and low-temperature supersonic flame spraying, etc., has made it possible to prepare coatings with excellent performance and wide application, but the preparation process is complicated and costly.

Method used

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  • Preparation method for titanium coating or titanium alloy coating
  • Preparation method for titanium coating or titanium alloy coating
  • Preparation method for titanium coating or titanium alloy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Titanium coatings were prepared by plasma spraying technology and titanium hydride powder was used as the powder raw material for spraying. The powder raw material parameters are shown in Table 1, and the plasma spraying process parameters are shown in Table 2.

[0028] Table 1 Parameters of spraying powder raw materials

[0029]

[0030] Table 2 Process parameters of titanium coating prepared by plasma spraying

[0031]

[0032] Microscopic morphology of the coating: the microscopic morphology of the titanium coating surface prepared by titanium hydride powder is as follows: figure 1 shown. Depend on figure 1 The microscopic morphology of the coating surface can be seen, and the coating surface prepared by titanium hydride powder is smooth and has few pores.

[0033] Coating composition analysis: The composition analysis results of the titanium coating prepared by plasma spraying titanium hydride powder are shown in Table 3. Comparing Table 3 and Table 1, it...

Embodiment 2

[0037] The titanium coating was prepared by plasma spraying technique. The powder raw material is a mixed powder of titanium hydride (80%) and titanium (20%). The powder raw material parameters are shown in Table 4, and the plasma spraying process parameters are shown in Table 5.

[0038] Table 4 Parameters of spraying powder raw materials

[0039]

[0040] Table 5 Process parameters of titanium coating prepared by plasma spraying

[0041]

[0042] The surface micromorphology of the titanium coating prepared by titanium hydride and titanium mixed powder is as follows: figure 2 shown. Depend on figure 2 The microscopic morphology of the coating surface can be seen, and the coating prepared by titanium hydride and titanium mixed powder has a smooth surface and few pores.

[0043] Coating composition analysis: The composition analysis results of the titanium coating prepared by plasma spraying titanium hydride and titanium mixed powder are shown in Table 6.

[0044]...

Embodiment 3

[0046] Embodiment 3 (comparative example):

[0047] The titanium coating was prepared by plasma spraying technology with pure titanium powder as the raw material for spraying powder. Table 1 and Table 2 show the parameters of powder raw materials and the process parameters of titanium coating prepared by plasma spraying.

[0048] Coating Micromorphology: The surface micromorphology of titanium coating prepared by pure titanium powder is as follows: image 3 shown. Depend on image 3 The microscopic morphology of the coating surface can be seen, and the surface of the titanium coating prepared by spraying pure titanium powder in the atmospheric environment has more pores. Coating composition analysis: The composition analysis results of the titanium coating prepared by plasma spraying pure titanium powder are shown in Table 7. Comparing Table 7 with Table 3 or Table 6, it can be seen that the oxygen content and nitrogen content of the coating prepared by pure titanium pow...

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Abstract

The invention belongs to the technical field of preparation for a titanium coating, and relates to a preparation method for a titanium coating or a titanium alloy coating. The preparation method comprises the following specific steps of: (1) granulating titanium hydride to prepare a titanium hydride powder having a grain diameter ranging from -100 meshes to +400 meshes, wherein the titanium hydride powder ia taken as a raw material, or the mixed powder of the titanium hydride powder and titanium or titanium alloy is used as a raw material, the mass of the titanium hydride powder occupies more than 60% of mass of the mixed powder, and the grain diameter of the mixed powder ranges form -100 meshes to + 400 meshes; and (2) spraying the raw material in the step (1) on a matrix to obtain the titanium coating or the titanium alloy coating. The method can be performed in an atmospheric environment; and moreover, large-area spray of the titanium coating or the titanium alloy coating can be realized.

Description

technical field [0001] The invention belongs to the technical field of preparing titanium coatings, and in particular relates to a coating preparation method of titanium or titanium alloys. Background technique [0002] Titanium or titanium alloy has various excellent properties, such as low density, high specific strength, corrosion resistance, high temperature and low temperature resistance, non-magnetic and non-toxic, etc. It is a new type of functional material and an important biological material, widely used in aviation , aerospace, ships and marine engineering, petrochemical, metallurgy, light industrial machinery, medical equipment and other fields. Thermal spraying technology can quickly deposit a thicker coating on a large area on a substrate, and is a basic technology for industrial production. Prepare dense titanium or titanium alloy coating on the substrate by thermal spraying instead of titanium, which is economical and can achieve its excellent performance. ...

Claims

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Application Information

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IPC IPC(8): C23C4/08
Inventor 闵小兵卢静严淑群夏光明贺立
Owner HUNAN METALLURGY MATERIAL RES INST
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