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

Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method

A liquid metal cooling and single crystal-based technology, applied in the field of alloys, can solve problems such as easy formation of freckles and small-angle grain boundaries, uneven structure of castings, and decreased heat dissipation efficiency, so as to reduce dendrite spacing and achieve high success rate. The effect of inhibiting precipitation

Active Publication Date: 2011-07-20
BEIHANG UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the casting is pulled out from the heat preservation area, the heat dissipation gradually becomes mainly radiation, and the heat dissipation efficiency drops rapidly, resulting in a continuous decrease in the temperature gradient at the solidification front. High segregation can easily lead to precipitation of TCP phase
Especially for the production of large-size gas turbine blades (>60mm), the above-mentioned shortcomings of the HRS method are very prominent

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
  • Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method
  • Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method
  • Method for preparing Ni3A1-based rhenium-contained moncrystal alloy with liquid metal cooling method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation of the metal tin: heating the raw material high-purity tin to the melting point temperature (232° C.) to make it liquid, and then pouring it into the liquid metal cooling tank 1. The surrounding of the liquid metal cooling tank 1 is heated by vacuum pump oil so that the temperature of the cooling tank is 250-250 ° C. 300 ° C, so that the metal tin remains liquid. The vacuum pump oil is preferably VM100 vacuum pump oil.

[0035] The second step: preparation of Ni containing rhenium 3 Al-based alloy test rod;

[0036] (1) will prepare Ni containing rhenium 3 Raw materials for Al-based alloys: high-purity nickel (Ni), high-purity aluminum (Al), high-purity molybdenum (Mo) and high-purity rhenium (Re) by weight percentage: 7-8wt% Al, 8-13% Mo, 0.0005 ~3wt% Re, and the rest is Ni for weighing, when the Ni containing rhenium is to be prepared 3 When there is more than one Dy, Y or Hf in the Al-based alloy, the components are weighed according to the weight...

Embodiment 1

[0048] A rhenium-containing Ni 3 The preparation method of Al-based single crystal alloy mainly comprises the following steps:

[0049] The first step: preparing liquid metal cooling medium;

[0050] The liquid metal cooling medium is gallium indium alloy. The preparation of the gallium-indium alloy: the raw materials high-purity gallium (Ga) and high-purity indium (In), by weight percentage: gallium 10wt%, the rest is indium, weighed, put into a beaker and heated to 80 ° C to make it After the reaction is liquid, it is poured into the liquid metal cooling tank 1 as a cooling medium, and the surrounding of the liquid metal cooling tank 1 is heated by vacuum pump oil to maintain the temperature of the cooling tank at 15°C, so that the gallium-indium alloy remains liquid;

[0051] The second step: preparation of Ni containing rhenium 3 Al-based alloy test rod;

[0052] (1) will prepare Ni containing rhenium 3 Raw materials for Al-based alloys: high-purity nickel (Ni), high-...

Embodiment 2

[0063] A rhenium-containing Ni 3 The preparation method of Al-based single crystal alloy specifically comprises the following steps:

[0064] The first step: preparing liquid metal cooling medium;

[0065] The liquid metal cooling medium is gallium indium alloy or metal tin. The preparation of the gallium-indium alloy: the raw materials high-purity gallium (Ga) and high-purity indium (In), by weight percentage: gallium 30wt%, the rest is indium, weighed, put into a beaker and heated to 200 ° C to make it After the reaction is liquid, it is poured into the liquid metal cooling tank 1 as a cooling medium, and the surrounding of the liquid metal cooling tank 1 is heated by vacuum pump oil to maintain the temperature of the cooling tank at 18°C, so that the gallium-indium alloy remains liquid;

[0066] The second step: preparation of Ni containing rhenium 3 Al-based alloy test rod;

[0067] (1) will prepare Ni containing rhenium 3 Raw material of Al-based alloy: 7.5wt% Al, 11...

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
lengthaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing Ni3A1-based rhenium-contained moncrystal alloy with a liquid metal cooling method, which concretely comprises the following steps of: firstly, preparing a liquid metal cooling medium; secondly, preparing a Ni3A1-based rhenium-contained alloy coupon; and thirdly, preparing a Ni3A1-based rhenium-free alloy seed crystal and the like. In the method, liquid metal (such as gallium and indium alloy or tin) is used as the cooling medium so that the cooling speed of a casting and the temperature gradient (200-350 K / cm) of a solid and liquid interface are increased; and a Ni3A1-based rhenium-contained moncrystal high-temperature alloy with small primary dendrite arm spacing, uniform tissues and low segregation is prepared with a seed crystal method through changing solidification process parameters such as heating temperature, pulling rate and the like, thereby obtaining Ni3A1-based rhenium-contained moncrystal alloy with excellent mechanical property.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a method for preparing rhenium-containing Ni by adopting a liquid metal cooling method. 3 Al-based single crystal alloy method. Background technique [0002] Ni 3 The melting point of Al intermetallic compound is 1395°C, it has high high temperature strength, creep resistance and high specific strength, and the yield strength has a positive temperature effect below the peak temperature, single crystal Ni 3 Al has high plasticity, but polycrystalline Ni 3 Al is brittle. Therefore consider Ni 3 Al-based alloys may break through the service temperature of existing nickel-based alloys. [0003] At present, in the industrial fields of power, petrochemical, transportation, especially aviation and aerospace, the engine is required to have a higher thrust-to-weight ratio and work efficiency, which requires the engine to have a higher operating temperature. The commonly u...

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 Applications(China)
IPC IPC(8): C30B29/52C30B15/00
Inventor 徐惠彬汤林志宫声凯
Owner BEIHANG UNIV
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