Vacuum annealing method for tantalum tube

A tantalum tube annealing technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of poor structure and performance of tantalum tubes, achieve good structure and performance, large temperature gradient, and improve surface properties

Inactive Publication Date: 2009-12-16
长沙南方钽铌有限责任公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above disadvantages and provide a vacuum anneal

Method used

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  • Vacuum annealing method for tantalum tube

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Example Embodiment

[0018] In order to further illustrate the present invention, the preferred examples of the present invention will be described below with reference to the accompanying drawings and embodiments, and the objectives, features and advantages of the present invention can be clearly seen.

[0019] Referring to the drawings, the steps of the present invention are as follows:

[0020] 1. Cleaning: Clean the tantalum tube (Ta1) with an outer diameter of 20mm, a wall thickness of 1mm, and a length of 800mm, and dry it. Ensure that the inner and outer walls of the tantalum tube are free of oil and water marks.

[0021] 2. Loading: Put the cleaned batch of tantalum tubes into the heat-resistant material sleeve first, and then send them into the vacuum annealing furnace along the axial direction by the automatic transmission device, and the automatic transmission device stops working.

[0022] 3. Vacuum pumping: first turn on the mechanical pump and pump it to a vacuum of 10 3 At Pa, turn on t...

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Abstract

The invention relates to a rapid vacuum annealing method for a tantalum tube, which comprises the steps of: washing and air-drying the tantalum tube; placing the washed tantalum tube into a heat-resistant casing, and axially sending the washed tantalum tube and the heat-resistant casing to a vacuum induction annealing furnace together; adopting a three-stage vacuum system to work, and ensuring that the three-stage vacuum system pumps until the vacuum degree is 10Pa; ensuring that the inside of the vacuum induction annealing furnace is in a high vacuum state; and annealing the tantalum tube in the vacuum induction annealing furnace, namely finishing the temperature increase by heating and quick cooling in the furnace. The annealing by the method has the advantages of quick temperature increase of the tantalum tube, good product structure and performance of the tantalum tube, good mass conformance of the tantalum tube, low energy consumption, low operation cost, low investment on annealing equipment, and simple disassembly and maintenance. The method does not perform heat preservation for a long time and has low power consumption. The admissible stress of the tantalum tube is improved by 60 percent or so compared with the prior vacuum annealing furnace after the annealing is performed by the method; and under the same service strength, the method can save about 40 percent of tantalum materials and has remarkable economic benefit.

Description

technical field [0001] The invention relates to a vacuum annealing method for a tantalum tube. Background technique [0002] Tantalum pipes will undergo work hardening during cold working such as rolling or drawing. Before further processing, they generally need to be annealed at a high temperature of 1000-1200°C to eliminate internal stress and restore the processing plasticity of the pipe, which is beneficial to diameter reduction and reduction. The walls are further processed to reach the required size. Most of the finished pipes are soft or semi-hard, and need to be fully annealed for recrystallization or incomplete annealed to eliminate internal stress before use. Due to the strong chemical activity of tantalum at high temperature, it will interact with gas components such as oxygen, nitrogen, and hydrogen in the air or heating atmosphere, and it will also interact with processing lubricants and oil stains on the surface of the pipe, making the surface of the tantalum ...

Claims

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Application Information

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IPC IPC(8): C22F1/18C21D9/08C21D1/26C21D1/773
Inventor 蒋坤林徐嘉立章小康骆登高
Owner 长沙南方钽铌有限责任公司
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