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

Ni3Al-based single-crystal high-temperature alloy and preparation method thereof

A high-temperature alloy based single crystal technology, applied in the field of alloys, can solve problems such as difficult to meet the temperature bearing capacity, aggravate the precipitation of TCP or MC phase, high alloy density and cost

Active Publication Date: 2021-10-29
北航(四川)西部国际创新港科技有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The initial melting point of IC6 alloy is 1315°C, but its strength is low at 1200°C, so it is only suitable for making guide vanes below 1150°C; the IC21 alloy independently developed by Beihang University (Zhao Haigen, Li Shusuo, Pei Yanling, Gong Shengkai, Xu Huibin.Ni 3 Microstructure and mechanical properties of Al-based single crystal alloy IC21[J]. Acta Metallica Sinica, 2015(10): 1279-1287.) further increases the initial melting point of the alloy by 10-20°C, and the alloy has excellent properties at 1100-1150°C Mechanical properties and oxidation resistance, but it is difficult to meet the requirements of higher temperature bearing capacity (use temperature of 1200 ° C and above)
At present, the third-generation or higher-generation superalloys (Pollock T M, Tin S. Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties [J]. Journal of Propulsion and Power, 2006, 22 (2) :361-375. And Sun Xiaofeng, Jin Tao, Zhou Yixuan, etc. Research progress of nickel-based single crystal superalloy [J]. China Materials Progress, 2012(12): 1-11.), all by adding 5.0~7.0wt% . Re and a large amount of refractory elements such as W, Co, Ta, Mo, Nb, etc., but a large amount of refractory elements will aggravate the precipitation of TCP or MC phase, reduce the structural stability of the alloy, and the density and cost of the obtained alloy are lower high

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
  • Ni3Al-based single-crystal high-temperature alloy and preparation method thereof
  • Ni3Al-based single-crystal high-temperature alloy and preparation method thereof
  • Ni3Al-based single-crystal high-temperature alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] The present invention also provides the Ni described in the above-mentioned technical scheme 3 A method for preparing an Al-based single crystal superalloy, comprising the following steps:

[0059] Smelting and casting the alloy raw materials in sequence to obtain the alloy billet;

[0060] performing spiral crystal selection and heat treatment on the alloy cast slab in turn to obtain the Ni 3 Al-based single crystal superalloy.

[0061] In the invention, alloy raw materials are smelted and cast in sequence to obtain an alloy billet.

[0062] In the present invention, the alloy raw materials preferably include pure Ni, pure Al, pure Mo, pure Re, pure Ta, pure Hf, pure C, pure Y and Ni-Ce alloys. In the present invention, the mass percentage of Ce in the Ni—Ce alloy is preferably 65%. The present invention does not have special limitation to the specific source and addition amount of described alloy raw material, in order to obtain the Ni that satisfies the chemical ...

Embodiment 1

[0081] The alloy raw materials are: pure Ni, pure Al, pure Mo, pure Re, pure Ta, pure Hf, pure C, pure Y and Ni-Ce alloy, wherein the mass percentage of Ce in the Ni-Ce alloy is 65%;

[0082] Design Ni 3 The chemical composition of Al-based single crystal superalloy is Al 7.6wt.%, Mo 8.0wt.%, Ta3.0wt.%, Re 3.0wt.%, Hf 0.1wt.%, Y 0.01wt.%, Ce 0.005wt.%. %, C0.005wt.%, the remainder of Ni and unavoidable impurities;

[0083] By design Ni 3 The chemical composition of the Al-based single crystal superalloy, the pure Ni which accounts for 50wt.% of the total pure Ni content is placed in the bottom of the crucible of the ZGJL-0.025 vacuum induction furnace, and then pure Mo, pure Re, pure Ta, Pure Hf, pure C and Ni-Ce alloy, cover the remaining pure Ni on the alloy raw material, evacuate the cavity of the vacuum induction furnace to below 1Pa, turn on the heating, increase the heating power step by step until the metal raw material block melts, at 1520 ℃ for 20 minutes for the f...

Embodiment 2

[0100] The raw material alloys are: pure Ni, pure Al, pure Mo, pure Re, pure Ta, pure Hf, pure C, pure Y and Ni-Ce alloy, wherein the mass percentage of Ce in the Ni-Ce alloy is 65%;

[0101] Design Ni 3 The chemical composition of Al-based single crystal superalloy is Al 7.6wt.%, Mo 9.5wt.%, Ta3.0wt.%, Re 3.0wt.%, Hf 0.1wt.%, Y 0.01wt.%, Ce 0.005wt.%. %, C0.005wt.%, the remainder of Ni and unavoidable impurities;

[0102] By design Ni 3 The chemical composition of the Al-based single crystal superalloy, the pure Ni which accounts for 50wt.% of the total pure Ni content is placed in the bottom of the crucible of the ZGJL-0.025 vacuum induction furnace, and then pure Mo, pure Re, pure Ta, Pure Hf, pure C and Ni-Ce alloys, cover the remaining pure Ni on the alloy raw materials, evacuate the cavity of the vacuum induction furnace to below 1Pa, turn on the heating, and increase the heating power step by step until the metal raw materials are melted, at 1540 ℃ for 20 minutes for...

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
Diameteraaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of alloys, and relates to a Ni3Al-based single-crystal high-temperature alloy and a preparation method thereof. The Ni3Al-based single crystal high-temperature alloy provided by the invention is prepared from the following elements in percentage by mass: 7.0 to 8.1 percent of Al, 8.0 to 9.5 percent of Mo, 3.0 to 5.0 percent of Ta, 2 to 3.5 percent of Re, 0.05 to 0.1 percent of Hf, 0.0005 to 0.001 percent of Y, 0.001 to 0.005 percent of Ce, 0.001 to 0.005 percent of C and the balance of Ni and inevitable impurities. The Ni3Al-based single-crystal high-temperature alloy provided by the invention has the characteristic of high temperature bearing capacity, high and stable high-temperature tensile strength and excellent high-temperature oxidation resistance.

Description

technical field [0001] The invention belongs to the technical field of alloys, in particular to a Ni 3 Al-based single crystal superalloy and its preparation method. Background technique [0002] Superalloys refer to a class of metal materials that can work for a long time at high temperatures above 600°C and under a certain stress. properties, also known as "super alloys", are mainly used in aerospace and energy fields. [0003] The initial melting point of IC6 alloy is 1315°C, but its strength is low at 1200°C, so it is only suitable for making guide vanes below 1150°C; the IC21 alloy independently developed by Beihang University (Zhao Haigen, Li Shusuo, Pei Yanling, Gong Shengkai, Xu Huibin.Ni 3 Microstructure and mechanical properties of Al-based single crystal alloy IC21[J]. Acta Metallica Sinica, 2015(10): 1279-1287.) further increases the initial melting point of the alloy by 10-20°C, and the alloy has excellent properties at 1100-1150°C Mechanical properties and o...

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): C30B29/52C22C19/03C22C1/02C30B11/00C30B33/02
CPCC30B29/52C22C19/03C22C19/007C22C1/023C30B11/00C30B33/02Y02T50/60
Inventor 张恒黄嘉鹏茹毅裴延玲李树索宫声凯
Owner 北航(四川)西部国际创新港科技有限公司
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