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Tantalum alloy, preparation method of tantalum alloy seamless tube and tantalum alloy seamless tube

A technology of tantalum alloy and seamless tube, which is applied in the fields of tantalum alloy seamless tube and its preparation, tantalum alloy and its preparation, and can solve problems such as insufficient equipment strength

Active Publication Date: 2021-02-12
长沙南方钽铌有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above technical problems, a tantalum alloy and its preparation method, a tantalum alloy seamless pipe and its preparation method are provided, which solves the problem of insufficient strength of pure tantalum metal used in the fields of aviation, spaceflight and atomic energy development. The tantalum alloy prepared by the invention has a Vickers hardness ≥ 170 at 1100°C, and has the characteristics of good room temperature processability, high temperature strength and high temperature hardness, and the tantalum alloy seamless pipe prepared by using the tantalum alloy has excellent room temperature plasticity And good oxidation resistance, can be used in harsh and extreme environments with ultra-high temperatures greater than 1100 °C

Method used

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  • Tantalum alloy, preparation method of tantalum alloy seamless tube and tantalum alloy seamless tube

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preparation example Construction

[0050]Further, a method for preparing a tantalum alloy is also provided, including the following steps:

[0051]Vacuum sintering to obtain a metal sintered bar;

[0052]Perform two electron beam smelting on the metal sintered bar to obtain a metal alloy ingot;

[0053]Thermal mechanical processing is performed on the metal alloy ingot to obtain a tantalum alloy billet.

[0054]Furthermore, a method for preparing a tantalum alloy seamless pipe is also provided, which includes the following steps:

[0055]The tantalum alloy billet prepared by the above-mentioned tantalum alloy preparation method is used as the raw material, and the raw material is forged and billeted by a screw press after the temperature is kept at 980-1200°C for 30 minutes. Cumulative deformation rate ≥40%, to obtain the first tantalum alloy;

[0056]Performing vacuum recrystallization annealing on the first tantalum alloy by a vacuum annealing furnace, and cooling the first tantalum alloy after the vacuum recrystallization annealing...

Embodiment 1

[0079]The Ta-4Mo-4Re tantalum alloy specifically follows the following steps:

[0080]Weigh 5kg of molybdenum powder, 3.5kg of rhenium powder and 91.5kg of tantalum powder, put the metallurgical raw materials into a mixer and mix them, put the mixed metallurgical raw materials into a plastic sleeve every 10kg, and place them in an isostatic press In the middle, the metal strips are pressed into a total of 10, and the above 10 metal bars are respectively placed in a vertical melting furnace for vacuum vertical melting and sintering. The vacuum degree of the vertical melting furnace is 3.5x10-3Pa, vacuum vertical melting and sintering lasts for 3h until the temperature of the metal strip reaches 1700℃, then the temperature of the metal strip is raised to 2200℃ in increments of 100℃, the metal strip is kept at 2200℃ for 4 hours, and then cooled in vacuum After 5 hours to room temperature, 10 vacuum sintered alloy bars totaling 100 kg were obtained.

[0081]After that, the 10 vacuum sintered ...

Embodiment 2

[0087]The Ta-4Mo-4Re tantalum alloy specifically follows the following steps:

[0088]Weigh 5kg of molybdenum powder, 4.3kg of rhenium powder and 90.7kg of tantalum powder, put the metallurgical raw materials in a mixer and mix them, put the mixed metallurgical raw materials into a plastic sleeve every 10kg, and place them in an isostatic press In the middle, the metal bars are pressed into a total of 10; the above 10 metal bars are respectively placed in a vertical melting furnace for vacuum vertical melting and sintering, and the vacuum degree of the vertical melting furnace is 3.5x10-3Pa, vacuum vertical melting and sintering lasts for 3h until the temperature of the metal strip reaches 1700℃, then the temperature of the metal strip is raised to 2200℃ in increments of 100℃, the metal strip is kept at 2200℃ for 4 hours, and then cooled in vacuum After 5 hours to room temperature, 10 vacuum sintered alloy bars totaling 100 kg were obtained.

[0089]After that, the 10 vacuum sintered allo...

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Abstract

The invention relates to the technical field of tantalum alloy machining, in particular to a tantalum alloy and a preparation method thereof, a tantalum alloy seamless tube and a preparation method thereof. The preparation method of the tantalum alloy comprises the following steps: performing vacuum sintering to obtain a metal sintered strip, performing electron beam melting on the metal sinteredstrip twice to obtain a metal alloy ingot, and performing thermal machining on the metal alloy ingot to obtain a tantalum alloy blank. The Vickers hardness of the tantalum alloy prepared through the method is larger than or equal to 170 at the temperature of 1100 DEG C, the tantalum alloy has the characteristics of being good in room-temperature machining performance and high in high-temperature strength and high-temperature hardness, and the tantalum alloy seamless tube prepared from the tantalum alloy has excellent room-temperature plasticity and good oxidation resistance, and can be appliedto a severe extreme environment with the ultra-high temperature of more than 1100 DEG C.

Description

Technical field[0001]The invention relates to the technical field of tantalum alloy processing, in particular to a tantalum alloy and a preparation method thereof, a tantalum alloy seamless pipe and a preparation method thereof.Background technique[0002]With the rapid technological progress in the fields of aviation, aerospace and atomic energy development, it has brought severe material challenges to equipment designers and manufacturers. In addition to the necessity of operating in extremely high temperature environments, materials used in equipment in the fields of aviation, aerospace and atomic energy development must have high strength, be weldable, have a reasonably long life, and be able to withstand the harmful effects of various conditions, such as Variable stress, oxidation, thermal cycling, particle erosion, radiation, etc. The ideal properties of these materials must be balanced in order to produce reliable parts to meet the design and economic factors that must be consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C22C1/02C22C1/04C22C27/02C22F1/02C22F1/18F16L9/02
CPCB23P15/00C22C27/02C22C1/045C22C1/02C22F1/18C22F1/02F16L9/02
Inventor 陈尚军蒋任翔蒋泽中张林彭智文永海
Owner 长沙南方钽铌有限责任公司
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