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Titanium alloy surface inflaming retarding sealing integrated coating and preparing method an application thereof

A sealing coating and titanium alloy technology, applied in metal material coating process, coating, fusion spraying, etc., can solve problems such as increased fuel consumption and reduced engine efficiency, and achieve reduced maintenance costs and simplified structure , the effect of low density structure

Active Publication Date: 2020-02-04
INNER MONGOLIA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the gap between the casing and the blades increases, the efficiency of the engine also decreases. Some data show that the air path clearance of the high-pressure turbine blade tip of a typical engine is reduced by 0.254mm, and the efficiency can be increased by about 1%; the radial clearance of the compressor Increase 0.076mm, the fuel consumption rate can increase by about 1%; every 2% increase in work efficiency of a 530MW steam turbine can save about 23 million yuan and reduce 29,000 tons of CO 2 emissions

Method used

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  • Titanium alloy surface inflaming retarding sealing integrated coating and preparing method an application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Surface treatment of titanium alloy substrates: TC4 titanium alloy samples with a diameter of 25 mm and a thickness of about 3.5 mm are used as disc samples. Grind to 800 mesh step by step, so that the sample exposes a flat and relatively smooth sprayed surface;

[0026] The substrate is sandblasted by a sandblasting machine. The sand composition used for sandblasting is alumina, and the particle size of the sand is 30 meshes, so that the substrate can obtain a certain roughness and improve the bonding force between the coating and the substrate. After sandblasting The base roughness Ra is 1.5μm;

[0027] (2) Preheating of the titanium alloy base material: preheating the titanium alloy with a supersonic flame to make the base material expand properly, the preheating temperature is 100°C-130°C, and the preheating time is 20S;

[0028] (3) Preparation of flame retardant layer coating: the spraying material of flame retardant layer coating is Ti 40 Zr 25 Ni 3 Cu 1...

Embodiment 2

[0032] (1) Surface treatment of titanium alloy substrates: TC4 titanium alloy samples with a diameter of 25 mm and a thickness of about 3.5 mm are used as disc samples. Grind to 800 mesh step by step, so that the sample exposes a flat and relatively smooth sprayed surface;

[0033] The substrate is sandblasted by a sandblasting machine. The sand composition used for sandblasting is alumina, and the particle size of the sand is 30 meshes, so that the substrate can obtain a certain roughness and improve the bonding force between the coating and the substrate. After sandblasting The base roughness Ra is 1.5μm;

[0034] (2) Preheating of the titanium alloy base material: the titanium alloy is preheated with a supersonic flame to cause proper expansion of the base material. The preheating temperature is 100°C-130°C; the preheating time is 20S.

[0035] (3) Preparation of flame retardant layer coating: the spraying material of flame retardant layer coating is Ti 40 Zr 25 Ni 3 Cu...

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Abstract

The invention discloses a titanium alloy surface inflaming retarding sealing integrated coating and a preparing method an application thereof. The coating is composed of an inflaming retarding layer coating and a wearable sealing coating. The inflaming retarding layer coating is located between the titanium alloy surface and the wearable sealing coating. The preparing method comprises the following steps of firstly, surface treatment of a titanium alloy base material; secondly, preheating of the titanium alloy base material; thirdly, preparing of the inflaming retarding layer coating; and fourthly, preparing of the wearable sealing coating. An inflaming retarding layer of a titanium-zirconium amorphous alloy serves as a bonding layer to be used, an original bonding layer is omitted, NiCrAl-bentonite is adopted to serve as the wearable sealing face layer, blades and a case are protected, the porosity is reduced, the heat efficiency is improved, the manufacturing cost is reduced, and themaintaining cost is reduced.

Description

technical field [0001] The invention relates to the technical field of titanium alloy surface treatment. Specifically, it relates to a flame retardant and sealing integrated coating on the surface of titanium alloy, its preparation method and application. Background technique [0002] Titanium alloy has the characteristics of low density, high strength, excellent heat resistance and corrosion resistance, and is widely used in aerospace and other fields. The casing and rotor blades of the aero-engine compressor are all made of titanium alloy. However, with the continuous improvement of engine performance, the temperature of the compressor casing is also increasing, and the increase in the ambient temperature of the equipment also brings challenges to the material itself. The increase in the temperature in the casing is also more and more obvious for the expansion of the blade material. According to information, from 1977 to 1988 in the United States and the Soviet Union, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/06C23C4/02C22C45/10
CPCC22C45/10C23C4/02C23C4/06C23C4/129
Inventor 马文齐英伟白玉汪瑞军马小斌鲍曼雨赵嘉炜张辰楠陈伟东
Owner INNER MONGOLIA UNIV OF TECH
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