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Bi-phase nano particle reinforced titanium alloy protective coating and preparation method of bi-phase nano particle reinforced titanium alloy protective coating

A technology of nano-particles and protective coatings, which is applied in the coating process of metal materials, coatings, etc., can solve the problems of less research on coatings, and achieve the effects of strong engineering application value, improved performance, and improved work ability

Active Publication Date: 2013-06-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] As far as the applicant knows, relevant literature at home and abroad is about nanometer La 2 o 3 There are very few studies on NiCoCrAlY composite coatings reinforced with nano-WC dual-phase particles, especially the preparation of nano-La on titanium alloy substrates by laser cladding technology, grinding quenching technology and cryogenic treatment technology. 2 o 3 The NiCoCrAlY composite coating reinforced with nano-WC dual-phase particles is even more blank

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Embodiment 1

[0030] A method for preparing a dual-phase nanoparticle-reinforced titanium alloy protective coating, the key of which is to pretreat the surface of the titanium alloy first, then prepare micro-nano composite powder, and finally pass laser cladding, grinding quenching, cryogenic treatment and Twice low-temperature tempering to obtain a protective coating with high hardness, high strength and excellent wear resistance, corrosion resistance and heat resistance. Specific steps are as follows:

[0031] 1. For the pretreatment of the titanium alloy surface, first polish it with W28 metallographic sandpaper, and then polish it with W20, W14, W10 sandpaper in sequence. The purpose is to keep the surface of the titanium alloy with a certain roughness, which is conducive to enhancing the adhesion of the coating. Finally, clean the polished titanium alloy with alcohol and dry it with cold air for later use.

[0032] 2. Preparation of micro-nano composite powder: first, 4 grams of nano-...

Embodiment 2

[0038] A method for preparing a dual-phase nanoparticle-reinforced titanium alloy protective coating, the key of which is to pretreat the surface of the titanium alloy first, then prepare micro-nano composite powder, and finally pass laser cladding, grinding quenching, cryogenic treatment and Twice low-temperature tempering to obtain a protective coating with high hardness, high strength and excellent wear resistance, corrosion resistance and heat resistance. Specific steps are as follows:

[0039] 1. For the pretreatment of the titanium alloy surface, first use W28 metallographic sandpaper to polish it, and then use W20, W14, W10 sandpaper to polish it in turn. The purpose is to maintain a certain roughness on the surface of the titanium alloy, which is conducive to enhancing the bonding force of the coating. Finally, clean the polished titanium alloy with alcohol and dry it with cold air for later use.

[0040] 2. Preparation of micro-nano composite powder: first, 2 grams o...

Embodiment 3

[0046] A method for preparing a dual-phase nanoparticle-reinforced titanium alloy protective coating, the key of which is to pretreat the surface of the titanium alloy first, then prepare micro-nano composite powder, and finally pass laser cladding, grinding quenching, cryogenic treatment and Twice low-temperature tempering to obtain a protective coating with high hardness, high strength and excellent wear resistance, corrosion resistance and heat resistance. Specific steps are as follows:

[0047] 1. For the pretreatment of the titanium alloy surface, first use W28 metallographic sandpaper to polish it, and then use W20, W14, W10 sandpaper to polish it in turn. The purpose is to maintain a certain roughness on the surface of the titanium alloy, which is conducive to enhancing the bonding force of the coating. Finally, clean the polished titanium alloy with alcohol and dry it with cold air for later use.

[0048] 2. Preparation of micro-nano composite powder: first, 6 grams o...

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Abstract

The invention relates to a bi-phase nano particle reinforced titanium alloy protective coating and a preparation method of the bi-phase nano particle reinforced titanium alloy protective coating, wherein the preparation method is characterized by comprising the steps of preparing nano La2O3 powders, WC powders and micron NiCoCrAlY into bi-phase nano particle reinforced metal base micron / nano composite powders according to a certain proportion; cladding the composite powders on the surface of titanium alloy through laser cladding; performing grinding and quenching on the titanium alloy coatingafter the cladding; placing the titanium alloy and the coating of the titanium alloy into liquid nitrogen for subzero treatment after the grinding and quenching; finally conducting twice low tempering on the titanium alloy coating after the subzero treatment. The titanium alloy protective coating has outstanding performances such as high hardness, high strength, wear resistance, thermal etching resistance and resistance to thermal shocks and the like.

Description

technical field [0001] The invention relates to a titanium alloy coating and its preparation method, in particular to a titanium alloy protective layer deposited with powders of two different particle sizes and its preparation method, in particular to a dual-phase nanoparticle-enhanced titanium alloy protective layer Coatings and methods of preparation. Background technique [0002] At present, the working conditions of the leading components in the aerospace field, represented by titanium alloys, are becoming increasingly harsh, and ensuring that these leading components are not damaged has become a key issue that needs to be solved urgently. One of the most effective ways to solve this problem is to prepare high-performance protective coatings on component-dominant materials. NiCoCrAlY coating is the connection layer of thermal barrier coatings (TBCs) used alone, and is currently the most valuable type of protective coating for aviation-based components. Related studies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C23C30/00C23C24/10C22F1/18
Inventor 黎向锋左敦稳江世好王宏宇孙玉利孙业斌柳振平许瑞华康晓军邱佳斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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