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Tantalum alloy, tantalum alloy seamless tube preparation method 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

Pending Publication Date: 2021-02-09
长沙南方钽铌有限责任公司
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  • Summary
  • 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 ≥ 150 at 1100°C, and has the characteristics of good room temperature processability, high temperature strength and high temperature hardness. 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, tantalum alloy seamless tube preparation method and tantalum alloy seamless tube

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preparation example Construction

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

[0051] Vacuum sintering to obtain metal sintered bars;

[0052] Metal sintered strips are subjected to two electron beam meltings to obtain metal alloy ingots;

[0053] The metal alloy ingot is thermomechanically processed to obtain a tantalum alloy billet.

[0054] Further, a method for preparing a tantalum alloy seamless pipe is also provided, comprising the following steps:

[0055] Take the tantalum alloy blank prepared by the above-mentioned tantalum alloy preparation method as the raw material, forge and open the raw material through a screw press at room temperature, and quickly perform multiple transverse blanking on the raw material, and ensure that the cumulative deformation rate of the raw material is ≥ 40 %, to obtain the first tantalum alloy;

[0056] performing vacuum recrystallization annealing on the first tantalum alloy in a vacuum annealing furnace, ...

Embodiment 1

[0079] The tantalum alloy of this Ta-4Nb-4Hf is specifically carried out according to the following steps:

[0080] Weigh 4.2kg of niobium powder, 4kg of hafnium powder and 91.8kg of tantalum powder, mix the metallurgical raw materials in a mixer, put the mixed metallurgical raw materials into a plastic sleeve every 10kg, and place them in an isostatic press , pressed into metal strips, a total of 10, the above-mentioned 10 metal strips were placed in the vertical melting furnace for vacuum vertical melting and sintering, and the vacuum degree in the vertical melting furnace was 3.5x10 -3 Pa, vacuum vertical sintering for 3h, until the temperature of the metal strip reaches 1700°C, then raise the temperature of the metal strip to 2200°C in 100°C increments, keep the metal strip at 2200°C for 4 hours, and then cool in vacuum After 5 hours to room temperature, 10 vacuum sintered gold bars totaling 100 kg were obtained.

[0081] Afterwards, the above-mentioned 10 vacuum sintered...

Embodiment 2

[0087] The tantalum alloy of this Ta-4Nb-4Hf is specifically carried out according to the following steps:

[0088] Weigh 4.3kg of niobium powder, 4kg of hafnium powder and 91.7kg of tantalum powder, mix the metallurgical raw materials in a mixer, put the mixed metallurgical raw materials into a plastic casing every 10kg, and place them in an isostatic press , pressed into metal strips, a total of 10; the above-mentioned 10 metal strips were placed in a vertical melting furnace for vacuum vertical melting and sintering, and the vacuum degree in the vertical melting furnace was 3.5x10 -3 Pa, vacuum vertical sintering for 3h, until the temperature of the metal strip reaches 1700°C, then raise the temperature of the metal strip to 2200°C in 100°C increments, keep the metal strip at 2200°C for 4 hours, and then cool in vacuum After 5 hours to room temperature, 10 vacuum sintered gold bars totaling 100 kg were obtained.

[0089] Afterwards, the above-mentioned 10 vacuum sintered a...

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Abstract

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 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 heat mechanical 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 150 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 applied to 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] Rapid technological advancements in the fields of aeronautics, spaceflight, and atomic energy development pose serious material challenges to device designers and manufacturers. In addition to the necessity of operating in extreme high temperature environments, materials used in equipment used in aviation, aerospace and atomic energy development must be high strength, 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 that meet the design and economic factors that must be considered. ...

Claims

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Application Information

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IPC IPC(8): C22C27/02C22C1/02C22F1/18C22F1/02B21J5/00F16L9/02C21D9/08C21D1/30C21D1/26C21D1/773
CPCC22C27/02C22C1/02C22F1/18C22F1/02B21J5/002F16L9/02C21D9/08C21D1/30C21D1/26C21D1/773
Inventor 蒋任翔陈尚军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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