Preparation method of hydrogen-containing titanium alloy wire for additive manufacturing

A titanium alloy wire and additive manufacturing technology, which is applied in the field of titanium alloys, can solve problems such as difficult processing, poor formability, and lower phase transition temperature, so as to improve internal structure, optimize hot forming performance, and reduce phase transition temperature Effect

Active Publication Date: 2021-10-26
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrogen-containing titanium alloy wire for additive manufacturing in view of the current status of low processing efficiency, poor formability, high processing difficulty, and poor performance of parts. method, which can significantly reduce the phase transition temperature, greatly reducing the heat required in the production process, thereby reducing manufacturing costs

Method used

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  • Preparation method of hydrogen-containing titanium alloy wire for additive manufacturing
  • Preparation method of hydrogen-containing titanium alloy wire for additive manufacturing
  • Preparation method of hydrogen-containing titanium alloy wire for additive manufacturing

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preparation example Construction

[0035] combine figure 1 As shown, the present invention proposes a method for preparing a hydrogen-containing titanium alloy wire for additive manufacturing, including:

[0036] Step 1. Homogenize and heat treat the titanium alloy ingot, which can be a titanium alloy rod with a certain length and diameter or a titanium alloy ingot of other shapes, including but not limited to a rectangle;

[0037] Step 2, putting the titanium alloy ingot into a closed tubular hydrogenation heating furnace, and injecting hydrogen into a hydrogenation treatment in a vacuum environment to obtain a hydrogenation titanium alloy ingot;

[0038] Step 3, putting the hydrogenated titanium alloy ingot into a heat treatment furnace for solid solution treatment;

[0039] Step 4, subjecting the titanium alloy ingot after the solution treatment to a hot drawing process with a preset deformation amount, and cooling in the furnace after drawing to obtain a titanium alloy wire; and

[0040] Step 5: Perform a...

Embodiment 1

[0059] [Implementation 1] Adopt the process of "hydrogen setting + solid solution + room temperature drawing + aging"

[0060] 1) The TC4 titanium alloy ingot is subjected to hydrogenation treatment, specifically, the TC4 titanium alloy ingot is placed in a tubular hydrogenation furnace, and the vacuum is evacuated to 1.5*10 -3 Pa, heat at a rate of 10-20°C / min to 700°C-800°C, hold for 10-30min, fill in 0.8% hydrogen according to the weight percentage of the titanium alloy ingot, hold for 2h, and then heat at 5-15°C / min min is cooled to room temperature to obtain a hydrogen-containing titanium alloy ingot; as image 3 shown;

[0061] 2) Perform solid solution treatment on the above-mentioned hydrogenated titanium alloy ingot, put the titanium alloy ingot into a heat treatment furnace, and heat it to T at a speed of 10-20°C / min. β ℃+10℃, keep warm for 20min~40min, then quench and cool to room temperature;

[0062] 3) The hydrogenated titanium alloy ingot is peeled to remove ...

Embodiment 2

[0065] [Implementation 2] Adopt the process of "hydrogen setting + solid solution + hot drawing + aging"

[0066] 1) The TC4 titanium alloy ingot is peeled to remove surface cracks and folds, one end is rounded, and hydrogen treatment is carried out. Specifically, the TC4 titanium alloy ingot is placed in a tubular hydrogen furnace and vacuumed to 1.5*10 -3 Pa, heat at a rate of 10-20°C / min to 700°C-800°C, hold for 10-30min, fill in 0.8% hydrogen according to the weight percentage of the titanium alloy ingot, hold for 2h, and then heat at 5-15°C / min min is cooled to room temperature to obtain hydrogen-containing titanium alloy ingot;

[0067] 2) Perform solid solution treatment on the above-mentioned hydrogenated titanium alloy ingot, put the titanium alloy ingot into a heat treatment furnace, and heat it to T at a speed of 10-20°C / min. β ℃+10℃, keep warm for 20min~40min, then quench;

[0068] 3) cast hydrogenated titanium alloy ingot at T β -50℃~T β -30°C temperature inte...

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Abstract

The invention provides a preparation method of a hydrogen-containing titanium alloy wire for additive manufacturing. The preparation method comprises the following steps: a titanium alloy cast ingot is subjected to homogenizing heating treatment; the titanium alloy cast ingot is put into a closed tubular hydrogenation heating furnace, hydrogen is introduced in a vacuum environment for solid hydrogenation treatment to obtain a hydrogenated titanium alloy cast ingot; the hydrogenated titanium alloy cast ingot is put into a heat treatment furnace for solution treatment; the titanium alloy ingot subjected to solution treatment is subjected to a hot drawing process with preset deformation, and furnace cooling is conducted after drawing to obtain a titanium alloy wire; and the titanium alloy wire obtained after hot drawing is subjected to aging treatment to obtain the hydrogen-containing titanium alloy wire used for additive manufacturing. According to the preparation method, the phase change temperature can be obviously reduced, and the heat required in the production process is reduced, thereby reducing the manufacturing cost, and a solid workpiece printed by using the material has excellent tensile strength, ductility and shear stress performance.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to improving the shaping of titanium alloy wires, and in particular to a method for preparing hydrogen-containing titanium alloy wires for additive manufacturing. Background technique [0002] The production process of titanium alloy wire can be realized by hot drawing or rolling of titanium alloy rod. Due to the poor thermoplasticity, the heat required for the manufacture of titanium alloy wire is huge, the production cycle and production cost are high, and the efficiency is low. , is a key factor restricting the marketization and large-scale application of titanium alloys. [0003] Due to the relatively high yield strength of titanium, good elasticity, and large deformation resistance, but its elastic modulus is relatively low, the deformation resistance is large during processing, and the resilience is also serious, and the adhesion problem during processing has a great i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F1/02B21C37/04B33Y70/00
CPCC22F1/183C22F1/02C22F1/002B21C37/047B33Y70/00Y02P10/25
Inventor 郭艳华郭才宝孙中刚戴国庆
Owner NANJING UNIV OF TECH
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