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

Nb-Ti-Ta-C (niobium-titanium-tantalum-carbon) alloy bar and preparation method thereof

A technology of nb-ti-ta-c and alloy rods, applied in the field of Nb-Ti-Ta-C alloy rods and its preparation, can solve the difficulties of processing and forming, deterioration of high temperature oxidation resistance, reduction of plasticity of niobium alloys, etc. problems, achieve good room temperature plasticity and high temperature oxidation resistance, improve high temperature oxidation resistance, and improve mechanical properties

Active Publication Date: 2016-10-12
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high degree of alloying, the crystal lattice is seriously distorted, the plasticity of the niobium alloy is seriously reduced, the processing performance of the material is deteriorated, and the yield is very low, and a single solid solution strengthening mechanism is difficult to greatly improve the high temperature mechanical properties of the niobium alloy. At the same time, due to the introduction of a large number of elements such as W, Mo, Ta and Hf, the specific gravity of the niobium alloy becomes larger and the high temperature oxidation resistance is seriously deteriorated, which is not conducive to the application in aerospace
Another high-strength niobium alloy is NbC dispersion-strengthened niobium alloy. Although NbC has a high melting point, high hardness and high elastic modulus, it can significantly improve the high-temperature strength of niobium alloys, but NbC is severely segregated, which seriously reduces the plasticity of the material. It is difficult to form and reduce the reliability of material use

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
  • Nb-Ti-Ta-C (niobium-titanium-tantalum-carbon) alloy bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The Nb-Ti-Ta-C alloy bar in this embodiment is composed of the following components by mass percentage: Ti30%, Ta10%, C0.4%, and the balance is Nb and unavoidable impurities.

[0024] The preparation method of the present embodiment Nb-Ti-Ta-C alloy bar comprises the following steps:

[0025] Step 1. Put titanium powder, tantalum powder and carbon powder in a non-consumable vacuum electric arc furnace, and evacuate until the pressure in the furnace is less than 5×10 -4 Pa, then pass argon into the non-consumable vacuum electric arc furnace after vacuuming, under the protection of argon atmosphere, melt twice at a melting temperature of 3150°C to obtain a Ti-Ta-C master alloy with uniform composition; The mass purity of the titanium powder, tantalum powder and carbon powder is not less than 99.5%;

[0026] Step 2. Mechanically crush the Ti-Ta-C master alloy described in step 1 to obtain master alloy powder, then add niobium powder to the master alloy powder, and press i...

Embodiment 2

[0032] The Nb-Ti-Ta-C alloy bar in this embodiment is composed of the following mass percentages: Ti 28%, Ta 8%, C 0.3%, and the balance is Nb and unavoidable impurities.

[0033] The preparation method of the present embodiment Nb-Ti-Ta-C alloy bar comprises the following steps:

[0034] Step 1. Put titanium powder, tantalum powder and carbon powder in a non-consumable vacuum electric arc furnace, and evacuate until the pressure in the furnace is less than 5×10 -4 Pa, then pass argon into the non-consumable vacuum electric arc furnace after vacuuming, under the protection of argon atmosphere, melt once at a melting temperature of 3000°C to obtain a Ti-Ta-C master alloy with uniform composition; The mass purity of the titanium powder, tantalum powder and carbon powder is not less than 99.5%;

[0035]Step 2. Mechanically crush the Ti-Ta-C master alloy described in step 1 to obtain master alloy powder, then add niobium powder to the master alloy powder, and press it into an ele...

Embodiment 3

[0040] The Nb-Ti-Ta-C alloy bar of this embodiment is composed of the following components by mass percentage: Ti32%, Ta12%, C0.5%, and the balance is Nb and unavoidable impurities.

[0041] The preparation method of the present embodiment Nb-Ti-Ta-C alloy bar comprises the following steps:

[0042] Step 1. Put titanium powder, tantalum powder and carbon powder in a non-consumable vacuum electric arc furnace, and evacuate until the pressure in the furnace is less than 5×10 -4 Pa, and then pass argon into the non-consumable vacuum electric arc furnace after vacuuming, under the protection of argon atmosphere, melt 3 times at a melting temperature of 3300 ° C to obtain a Ti-Ta-C master alloy with uniform composition; The mass purity of the titanium powder, tantalum powder and carbon powder is not less than 99.5%;

[0043] Step 2. Mechanically crush the Ti-Ta-C master alloy described in step 1 to obtain master alloy powder, then add niobium powder to the master alloy powder, and...

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
particle sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention provides an Nb-Ti-Ta-C (niobium-titanium-tantalum-carbon) alloy bar. The Nb-Ti-Ta-C alloy bar is prepared from the following components in percentage by mass: 25 percent to 35 percent of Ti, 5 percent to 15 percent of Ta, 0.2 percent to 0.6 percent of C, and the balance of Nb and unavoidable impurities. The invention also provides a preparation method of the alloy bar. The preparation method comprises the following steps of 1, preparing Ti-Ta-C intermediate alloy by non-consumable vacuum melting; 2, mechanically crushing the Ti-Ta-C intermediate alloy, uniformly mixing with Nb powder, and pressing into an electrode; 3, performing vacuum consumable electric arc melting, so as to obtain a casting ingot; 4, performing hot extrusion, so as to obtain the Nb-Ti-Ta-C alloy bar. The Nb-Ti-Ta-C alloy bar has the advantages that the room-temperature and high-temperature strengths are excellent, the plasticity is good, the anti-oxidizing property is better, and the Nb-Ti-Ta-C alloy bar can be used as a superhigh-temperature structure material for next generation of aerospace aircrafts.

Description

technical field [0001] The invention belongs to the technical field of alloy rods, and in particular relates to a Nb-Ti-Ta-C alloy rod and a preparation method thereof. Background technique [0002] Niobium (Nb) has the smallest proportion among refractory metals. Compared with other refractory metals, niobium alloy has higher specific strength, excellent plasticity, processability and weldability, and it also has a small thermal neutron absorption cross section. And resistance to liquid metal corrosion. As a high-temperature structural material, niobium alloy has good high-temperature strength and good processing and forming properties, and has been widely used in the aerospace field in the past few decades. However, with the development of aerospace technology and national defense industry, high-temperature structural materials are required to withstand high stress in high-temperature and oxidizing environments above 1200 °C. In order to improve the high-temperature stre...

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): C22C27/02C22C1/03B21C23/08
CPCB21C23/08C22C1/03C22C27/02
Inventor 喻吉良郑欣刘辉王峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com