Unlock instant, AI-driven research and patent intelligence for your innovation.

Titanium fire resistant abradable sealing coating and preparation method thereof

A sealing coating and wear-resistant technology, applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of continuous combustion sensitivity of titanium alloy and "titanium fire failure" to achieve good wearability and prolong Long life and low coefficient of friction

Pending Publication Date: 2022-02-15
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium alloys generally have fatal continuous burning sensitive problems, which will lead to "titanium fire" failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Titanium fire resistant abradable sealing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The preparation method of an anti-titanium fire abradable sealing coating is as follows:

[0023] (1) Spread the three powders on trays with lids or original containers with loose lids, and dry them in an oven set at 60°C for 1 hour. The dried powders are stored in the oven before use. or other dry containers, the powder is mixed and stirred in the container for 15 minutes before use;

[0024] The main chemical components and mass percentages of the three powders and the mass percentages of the particle size distribution are:

[0025] - NiCrAl bottom layer:

[0026] Main chemical composition: Ni77.0%, Al: 6.5%, Cr: 16.5%.

[0027] Mass percentage of particle size distribution: +150μm≤1%, -125~150μm≤10%, -45~125μm≥69%, -45μm≤20%.

[0028] ——Nano zirconia middle layer:

[0029] Main chemical composition: Y 2 o 3 +ZrO 2 +HfO 2 ≥99.5%, where Y 2 o 3 : 7.0%.

[0030] Mass percentage of particle size distribution: +62μm≤5%, -62~+30μm≥90%, -30μm≤5%.

[0031] ——AlSi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention aims to provide the abradable sealing coating with the titanium fire prevention function and the preparation method thereof. The sealing coating integrates the performance requirements of the titanium fire prevention coating and the abradable sealing coating and is of a three-layer structure system, the bottom layer is a NiCrAl coating with the thickness of 0.10-0.20 mm, the middle layer is a nano zirconium oxide coating with the thickness of 0.20-0.30 mm, the surface layer is an AlSi / BN coating with the thickness of 1.50-3.00 mm, the coating is good in matching performance, has a good heat insulation effect, is moderate in hardness, good in scraping performance and low in friction coefficient, and can meet the use requirement of the titanium alloy compressor casing at 450 DEG C.

Description

technical field [0001] The invention belongs to the technical field of coating materials, and in particular provides an anti-titanium fire abradable sealing coating and a preparation method thereof. Background technique [0002] Due to its high mechanical strength, low density, good heat resistance and excellent corrosion resistance, titanium alloy has been widely used in aero-engines, such as compressor casings, rotor disks, rotor blades, etc. are all made of titanium alloy materials. However, titanium alloys generally have fatal continuous burning sensitivity problems, which will lead to "titanium fire" failures. "Titanium fire" refers to an event in which titanium alloys are ignited and burned due to severe impact or friction, resulting in damage or burning. [0003] For the compressor casing made of titanium alloy, during the operation of the engine, the rotor blades and the casing may be overheated due to friction, resulting in a "titanium fire" phenomenon. In order t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C4/073C23C4/11C23C4/06C23C4/134
CPCC23C4/073C23C4/11C23C4/06C23C4/134
Inventor 张眸睿袁福河杨霖刘礼祥李长银
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION