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Titanium fire resistance coating

A technology of coating and titanium fire, which is applied in the direction of coating, metal material coating technology, etc., can solve the problems of reducing the fatigue performance of the substrate, poor impact resistance of the anti-titanium fire coating, and weak bonding of the substrate, so as to ensure fatigue resistance Effect of properties, high bond strength, strong oxidation tendency

Active Publication Date: 2017-09-08
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing anti-titanium fire coatings generally have shortcomings such as poor impact resistance, weak bonding with the substrate, or significantly reducing the fatigue performance of the substrate, which cannot meet the current needs. Therefore, it is necessary to develop coating materials with higher performance and Preparation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The titanium alloy base material is Ti60 alloy,

[0033] The brazing material is a continuous thin strip Ti-37.5Zr-15Cu-10Ni-based amorphous alloy with a thickness of 50 μm.

[0034] Cubic boron nitride CBN particles are selected as hard wear-resistant particles, and the cubic boron nitride CBN particles are electroless Ni-plated (containing Ni wt.30%),

[0035] The mass ratio of CBN particles to solder is: 8:2

[0036] First place a thin strip of brazing material on the tip of the blade in advance, so that the brazing material wraps the tip of the blade that needs to be coated with an anti-titanium fire coating, and uses an organic adhesive to mix with Ni-plated cubic boron nitride CBN particles (volume ratio 1:10), and then evenly coated on the solder (using the organic binder mixed with CBN particles can avoid the falling and loss of powder particles during furnace loading and vacuuming, and the organic binder will gradually volatilize);

[0037] at greater than o...

Embodiment 2

[0051] The base material is Ti60 alloy,

[0052] The brazing material is a continuous thin strip Ti-37.5Zr-15Cu-10Ni-based amorphous alloy with a thickness of 50 μm.

[0053] Cubic boron nitride CBN particles are selected as hard wear-resistant particles, and the cubic boron nitride CBN particles are electroless Ni-plated (containing Ni wt.30%),

[0054] The mass ratio of CBN particles to solder is 7:3

[0055] First place a thin strip of brazing filler metal on the tip of the blade, so that the brazing filler metal wraps the tip of the blade that needs to be laid with an anti-titanium fire coating, and uses an organic adhesive to mix with Ni-plated cubic boron nitride CBN particles (volume ratio 1:10), and then evenly coated on the solder;

[0056] at greater than or equal to 8 x 10 -4 In the high vacuum environment of Pa, the rotor blade tip is locally heated by the medium frequency induction coil (the size and shape of the coil can be designed according to the shape of t...

Embodiment 3

[0071] The base material is Ti60 alloy,

[0072] The brazing material is a continuous thin strip Ti-37.5Zr-15Cu-10Ni-based amorphous alloy with a thickness of 50 μm.

[0073] Cubic boron nitride CBN particles are selected as hard wear-resistant particles, and the cubic boron nitride CBN particles are electroless Ni-plated (containing Ni wt.30%),

[0074] The mass ratio of CBN particles to solder is 6:4,

[0075] First place a thin strip of brazing filler metal on the tip of the blade in advance, so that the brazing filler metal wraps the tip of the blade that needs to be laid with an anti-titanium fire coating, and uses an organic adhesive to mix with Ni-plated cubic boron nitride CBN particles (volume ratio 1 : 10), then evenly coated on the solder;

[0076] at greater than or equal to 8 x 10 -4 In the high vacuum environment of Pa, the rotor blade tip is locally heated by the medium frequency induction coil (the size and shape of the coil can be designed according to the ...

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Abstract

The invention discloses a titanium fire resistance coating. A continuous strip-shaped Ti-37.5Zr-15Cu-10Ni base amorphous alloy is selected to serve as brazing filler metal, CBN particles are selected as hard wear-resisting particles, strip-shaped brazing filler metal is placed on the blade tip in advance, and wraps the blade tip required to be coated with the titanium fire resistance coating, an organic bonding agent is used for being mixed with Ni-plated CBN particles, and the brazing filler metal is evenly coated with the bonding agent; in the vacuum environment, a medium-frequency induction coil is used for locally heating a rotor blade tip, the heating temperature is kept between 840 DEG C to 850 DEG C and is kept for a certain time, the brazing filler metal is completely molten, the brazing filler metal is naturally cooled in the high-vacuum environment, and the titanium fire resistance coating is formed; and the titanium fire resistance coating obtained through the preparing method of the titanium fire resistance coating has high hardness, high wear resistance, high impact resistance, high temperature oxidability resistance, high fire resistance and high combination strength, meanwhile, the property of the base body cannot be affected, and the base body anti-fatigue property is ensured.

Description

technical field [0001] The invention belongs to the technical field of anti-titanium fire coating, and in particular relates to an anti-titanium fire coating. Background technique [0002] Titanium alloy has the advantages of high strength, low density and high melting point, so it is widely used in compressor casings, rotor disks, rotor blades and other components of aviation gas turbine engines to reduce the weight of the engine and increase the thrust-to-weight ratio. However, ordinary titanium alloys will burn under certain temperature, pressure and airflow velocity, and the combustion will spread rapidly and damage engine components, thus restricting the application of titanium alloys in aircraft engines. [0003] In order to further improve engine efficiency, higher requirements are put forward for the sealing performance of the casing in the combustion chamber. Titanium alloy rotor blades rotate at high speed at high temperature. Due to thermal expansion or centrifug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C32/00C22C30/00
CPCC22C30/00C22C2026/003C23C24/103
Inventor 王铁钢刘艳梅戚厚军李彤
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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