Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A protective method of gh4708 nickel-based superalloy anti-high temperature wear-resistant coating

A nickel-based superalloy and wear-resistant coating technology, which is applied in the field of heat treatment, can solve problems such as complex processes, and achieve the effects of improving oxidation resistance and wear resistance, and improving oxidation resistance and corrosion resistance.

Active Publication Date: 2019-09-06
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electroplating chromium layer needs to be processed later, the process is complicated, and it is also a physical combination

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
  • A protective method of gh4708 nickel-based superalloy anti-high temperature wear-resistant coating
  • A protective method of gh4708 nickel-based superalloy anti-high temperature wear-resistant coating
  • A protective method of gh4708 nickel-based superalloy anti-high temperature wear-resistant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, the protection method of GH4708 nickel-based superalloy anti-high temperature and wear-resistant coating, the specific steps are as follows:

[0031] (1) Material: GH4708, the composition is shown in Table 1. Before aluminizing, it is subjected to 1140°C×1h, air-cooled for solid solution, and after aluminizing, it is subjected to 800°C×15h, and air-cooled for aging.

[0032] Table 1 GH4708 chemical composition (wt%)

[0033]

[0034] (2) Aluminized

[0035] Aluminizing agent configuration: Aluminizing agent is prepared by mixing aluminum-iron alloy powder with iron content of 42wt% and ammonium chloride powder of GB658-1988. Among them, by weight percentage, the aluminum-iron alloy powder accounts for 99.0%, and the ammonium chloride powder accounts for 1.0%.

[0036] Infiltration agent roasting: When roasting aluminum-iron alloy powder, add dry ammonium chloride powder and mix well. Put the mixture into an aluminized bag and keep it warm at 95...

Embodiment 2

[0052] The difference from Example 1 is that in this example, the specific steps for the protection method of the GH4708 nickel-based superalloy anti-high temperature and wear-resistant coating are as follows:

[0053] (1) Material: GH4708, the composition is shown in Table 1. Before aluminizing, it is subjected to 1140°C×1h, air-cooled for solid solution, and after aluminizing, it is subjected to 800°C×15h, and air-cooled for aging.

[0054] (2) Aluminized

[0055] Aluminizing agent configuration: Aluminizing agent is made by mixing aluminum-iron alloy powder with iron content of 50wt% and ammonium chloride powder of GB658-1988. Among them, by weight percentage, the aluminum-iron alloy powder accounts for 98.5%, and the ammonium chloride powder accounts for 1.5%.

[0056] Infiltration agent roasting: When roasting aluminum-iron alloy powder, add dry ammonium chloride powder and mix well. Put the mixture into an aluminized bag and keep it warm at 950°C±20°C for 5h-10h.

[0...

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

PropertyMeasurementUnit
depthaaaaaaaaaa
microhardnessaaaaaaaaaa
depthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of heat treatment, and particularly relates to a protection method for an anti-high-temperature wear-resistant coating layer made from a GH4708 nickel-based high-temperature alloy. The protection method comprises the following steps: aluminizing agent roasting, aluminizing agent preparation, part cleaning, packaging, aluminizing, discharging, unpackaging, part cleaning and inspection, wherein the GH4708 nickel-based high-temperature alloy is subjected to air-cooling solid solution for 0.5h to 2h at 1140+ / -20 DEG C before being aluminized, then processed intoa part for being aluminized, and then subjected to air-cooling aging for 10h to 20h at 800+ / -20 DEG C after being aluminized. The method disclosed by the invention is capable of meeting design and manufacturing requirements on embedded parts and shafts of low-pressure turbines of engines, the depth of an aluminized layer is 0.03mm to 0.08mm, an aluminum-rich NiAl phase is generated on a surface layer, and the microhardness of surface hardness is greater than 700HV, so that the oxidation resistance and wear resistance of the GH4708 nickel-based high-temperature alloy are greatly improved.

Description

technical field [0001] The technology belongs to the field of heat treatment, and in particular relates to a protection method for a GH4708 nickel-based superalloy anti-high temperature wear-resistant coating. Background technique [0002] GH4708 nickel-based superalloy can be used for a long time below 950°C. It is a common material for aero-engines and is used to manufacture load-bearing parts that are prone to wear in compressors, combustion chambers, turbines, and adjustable nozzles, such as low-pressure turbine inserts, shaft etc. The working temperature of these load-bearing parts is 700 ℃ ~ 850 ℃, and the working environment is harsh and easy to wear. Therefore, these parts are required not only to have good high temperature oxidation resistance, but also to have good wear resistance. [0003] There are many preparation methods for wear-resistant coatings, such as: gas carburizing, nitriding, thermal spraying tungsten carbide, chrome plating, etc. Carburizing is to ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/48
Inventor 牛静张凡云王蔓张春刚刘艳
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com