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Preparation method of composite coating capable of improving high-temperature anti-oxidization performance of titanium alloy

A high-temperature anti-oxidation and composite coating technology, which is applied in the coating process and coating of metal materials, can solve the problems of poor performance of MoSi2

Active Publication Date: 2018-09-11
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MoSi 2 The preparation method of MoSi is closely related to its performance. The traditional preparation methods include powder pressing, high-temperature sintering, thermal spraying, etc., but due to its high melting point and the limitation of oxidation problems in the synthesis process, the prepared MoSi 2 performance is not good

Method used

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  • Preparation method of composite coating capable of improving high-temperature anti-oxidization performance of titanium alloy
  • Preparation method of composite coating capable of improving high-temperature anti-oxidization performance of titanium alloy
  • Preparation method of composite coating capable of improving high-temperature anti-oxidization performance of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Put the configured composite powder into a ball mill (QM-3SP04) for 12 hours to obtain an alloy powder mixture and dry it;

[0043] (2) Using methyl cellulose solution as the binder, the mixed alloy powder of coating 1 is pre-placed on the surface of the titanium alloy TC4 substrate with a thickness of about 1.5 mm, and the temperature is maintained in a drying oven at 120°C for 2 hours;

[0044] (3) A semiconductor laser (DLS-980.10-3000C) with an output power of 1kW is used to scan the surface of the preset alloy powder, the laser beam output rectangular spot is 6mm×6mm, and the scanning speed is 4mm / s;

[0045] (4) Using single-channel laser scanning technology to prepare high-temperature anti-oxidation composite coating.

Embodiment 2

[0047] (1) Put the configured composite powder into a ball mill (QM-3SP04) for 12 hours to obtain an alloy powder mixture and dry it;

[0048] (2) Using methyl cellulose solution as the adhesive, pre-place the mixed alloy powder of coating 2 on the surface of the titanium alloy TC4 substrate with a thickness of about 1.5 mm, and heat it in a drying oven at 120°C for 2 hours;

[0049] (3) A semiconductor laser (DLS-980.10-3000C) with an output power of 1.5kW is used to scan the surface of the preset alloy powder, the laser beam output spot is 6mm×6mm, and the scanning speed is 4mm / s;

[0050] (4) Using single-channel laser scanning technology to prepare high-temperature anti-oxidation composite coating.

Embodiment 3

[0052] (1) Put the configured composite powder into a ball mill (QM-3SP04) for 12 hours to obtain an alloy powder mixture and dry it;

[0053] (2) Using methyl cellulose solution as the binder, pre-place the mixed alloy powder of coating 3 on the surface of the titanium alloy TC4 substrate with a thickness of about 1.5 mm, and heat it in a drying oven at 120°C for 2 hours;

[0054] (3) A semiconductor laser (DLS-980.10-3000C) with an output power of 1.8kW is used to scan the surface of the prefabricated powder, and its rectangular spot is 6mm×6mm. The laser scanning speed is 4mm / s;

[0055] (4) Using single-channel laser scanning technology to prepare high-temperature anti-oxidation composite coating.

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Abstract

The invention relates to an alloy material and in particular relates to a preparation method of a composite coating capable of improving the high-temperature anti-oxidization performance of a titaniumalloy. The preparation method comprises the following steps: (1) carrying out ball milling: putting prepared nickel, molybdenum and silicon powder into a ball grinding mill and carrying out the ballmilling to obtain an alloy powder mixture; (2) pre-preparing: taking a methyl cellulose solution as an adhesive; putting the alloy powder mixture into the surface of a titanium alloy TC4 matrix in advance; carrying out heat insulation at 120 DEG C for 2h in a drying furnace; (3) carrying out single-path scanning on the surface of the titanium alloy TC4 with alloy powder by adopting a semiconductorlaser device to prepare the high-temperature anti-oxidization compound coating. According to the preparation method provided by the invention, a laser cladding technology is adopted, and Ni-Mo-Si alloy powder is used as a raw material; the composite coating is prepared on the surface of a Ti6Al4V alloy, and a phase tissue structure, the microscopic rigidity and the high-temperature anti-oxidization performance of the coating are researched.

Description

Technical field [0001] The invention relates to an alloy material, in particular to a preparation method of a composite coating that improves the high-temperature oxidation resistance of a titanium alloy. Background technique [0002] Titanium is an important structural metal developed in the 1950s. Titanium alloy has high specific strength and specific rigidity, good corrosion resistance and other performance advantages. It has been used in aerospace, shipbuilding, weapons, marine, petrochemical, biological It is widely used in medical engineering and other fields. However, its low hardness and poor wear resistance, and its surface is easy to oxidize and fall off in high-temperature environments, which limit its application as sports auxiliary parts, such as turbine blades and exhaust valves of aero engines. [0003] Since both wear and oxidation originate from the surface of materials or parts, it is undoubtedly economical and feasible to prepare coatings with high hardness, goo...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C30/00
CPCC22C30/00C23C24/103
Inventor 刘秀波徐江宁王勉周仲炎柯金梁珏
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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