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

Ta-W-Hf-Re-C alloy and preparation method of Ta-W-Hf-Re-C alloy bar

An alloy and rod technology, applied in the field of refractory metal alloy preparation, can solve the problems of easy failure, sudden drop in creep resistance of tantalum-tungsten alloy, poor oxidation resistance, etc., to avoid a large amount of volatilization, ensure performance, and improve resistance Corrosive effect

Active Publication Date: 2022-08-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation resistance of tantalum-tungsten alloys is relatively poor, and oxidation begins at 600°C, so the strengthening mechanism of this type of alloy is prone to failure in high-oxygen extreme environments such as high-speed airflow erosion, extreme cold and extreme heat.
At the same time, when the service temperature exceeds 1100°C, the creep resistance of tantalum-tungsten alloys drops sharply

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
  • Ta-W-Hf-Re-C alloy and preparation method of Ta-W-Hf-Re-C alloy bar
  • Ta-W-Hf-Re-C alloy and preparation method of Ta-W-Hf-Re-C alloy bar
  • Ta-W-Hf-Re-C alloy and preparation method of Ta-W-Hf-Re-C alloy bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The Ta-W-Hf-Re-C alloy of this embodiment is composed of the following elements by mass percentage: a Ta-W-Hf-Re-C alloy, which is characterized in that it is composed of the following elements by mass percentage : W 6.6%, Hf 5%, Re 0.9%, C0.35%, the balance is Ta and inevitable impurities.

[0034] The preparation method of the bar of the Ta-W-Hf-Re-C alloy of the present embodiment comprises the following steps:

[0035] Step 1. According to the design content of the target product Ta-W-Hf-Re-C alloy bar, the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are mixed with a V-type mixer for 24 hours, and after mixing After the obtained mixed powder is completely cooled, it is molded with a 600T press to obtain a billet with a size (width × height × length) of 16 mm × 16 mm × 400 mm; the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are The particle size is no more than 60 mesh, and the mass purity...

Embodiment 2

[0042] The Ta-W-Hf-Re-C alloy of this embodiment is composed of the following elements by mass percentage: a Ta-W-Hf-Re-C alloy, which is characterized in that it is composed of the following elements by mass percentage : W 7.3%, Hf 3.5%, Re 0.86%, C 1.56%, the balance is Ta and inevitable impurities.

[0043] The preparation method of the bar of the Ta-W-Hf-Re-C alloy of the present embodiment comprises the following steps:

[0044] Step 1. According to the design content of the target product Ta-W-Hf-Re-C alloy bar, the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are mixed with a V-type mixer for 24 hours, and after mixing After the obtained mixed powder is completely cooled, it is molded with a 600T press to obtain a billet with a size (width × height × length) of 16 mm × 16 mm × 400 mm; the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are The particle size is no more than 60 mesh, and the mass pu...

Embodiment 3

[0051] The Ta-W-Hf-Re-C alloy of this embodiment is composed of the following elements by mass percentage: a Ta-W-Hf-Re-C alloy, which is characterized in that it is composed of the following elements by mass percentage : W 7.3%, Hf 3%, Re 0.9%, C2%, the balance is Ta and inevitable impurities.

[0052] The preparation method of the bar of the Ta-W-Hf-Re-C alloy of the present embodiment comprises the following steps:

[0053] Step 1. According to the design content of the target product Ta-W-Hf-Re-C alloy bar, the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are mixed with a V-type mixer for 24 hours, and after mixing After the obtained mixed powder is completely cooled, it is molded with a 600T press to obtain a billet with a size (width × height × length) of 16 mm × 16 mm × 400 mm; the tantalum powder, tungsten powder, hafnium powder, rhenium powder and carbon powder are The particle size is no more than 60 mesh, and the mass purity is...

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
Room temperature tensile strengthaaaaaaaaaa
Room temperature yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a Ta-W-Hf-Re-C alloy which is composed of the following elements in percentage by mass: 6%-8% of W, 3%-5% of Hf, 0.8%-0.9% of Re, 0.3%-2% of C and the balance of Ta and inevitable impurities. The invention further discloses a preparation method of the Ta-W-Hf-Re-C alloy bar. The method comprises the steps that firstly, raw material powder is evenly mixed and then subjected to mold pressing; 2, vacuum high-temperature sintering; 3, vacuum electron beam melting; and 4, die forging. According to the invention, Hf is added to form a stable oxide, so that the corrosion resistance, high temperature resistance and processability of the alloy are improved, and Re and C are added to improve the creep strength of the alloy, so that the alloy is suitable for working in extreme environments such as ultra-high temperature and ultra-high pressure; according to the preparation method, alloy homogenization is promoted, volatilization of a large amount of Hf elements is avoided, and the performance of a Ta-W-Hf-Re-C alloy bar is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of preparation of refractory metal alloys, in particular to a preparation method of a Ta-W-Hf-Re-C alloy and a bar thereof. Background technique [0002] The power source of space nuclear reactor is the only power source that can meet the requirements of space flight, and its nuclear fuel element package and other core components need to grow in harsh environment of high temperature, strong neutron flux irradiation and potential contact with liquid alkali metal coolant. Time operation, which requires such materials to have high high temperature creep resistance, good corrosion resistance, high high temperature durable strength, fracture toughness, etc. Traditional nickel-based, cobalt-based and other high-temperature alloy materials cannot meet the above requirements. High-tungsten-tantalum alloy is a very important and widely used high-temperature and high-strength material among tantalum alloys. Because ...

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): C22C27/00B22F3/02B22F3/10B22F3/17C22C1/02C22C1/04
CPCC22C27/00B22F3/02B22F3/1007B22F3/17C22C1/02C22C1/045Y02E30/30
Inventor 王晖白润薛建嵘王峰夏明星蔡小梅李来平
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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