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High-strength high-plastic titanium alloy powder for laser rapid prototyping and repairing, and preparation method thereof

A laser rapid prototyping and titanium alloy technology, applied in the field of metal powder materials, can solve the problem of mismatch between plasticity and comprehensive mechanical properties, and achieve the effect of eliminating serious cracking failure problems, controlling superheat, and uniform performance.

Active Publication Date: 2019-01-22
CAPITAL AEROSPACE MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, a high-strength and high-plastic titanium alloy powder for laser rapid prototyping and repair eliminates the serious cracking problem existing in the continuous long-term laser melting deposition forming process of the existing titanium alloy large structure, It overcomes the lack of mismatch between the plasticity and comprehensive mechanical properties of the existing titanium alloy laser melting deposition state and the casting / forging state

Method used

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preparation example Construction

[0033] The embodiment of the present invention provides a method for preparing high-strength and high-plasticity titanium alloy powder for laser rapid prototyping and repairing, which specifically includes the following steps:

[0034] (1) Master alloy billet smelting

[0035] According to the main element composition: Al5.0~6.2wt%, Si0.25~0.40wt%, Zr0.8~2.0wt%, Mo3.5~4.5wt%, the rest is Ti matrix, secondary element composition: O0 .03~0.07wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, perform alloy proportioning, and prepare master alloy billet;

[0036] (2) Electrode rod preparation

[0037] The master alloy billet is prepared into an electrode rod, and the straightness deviation of the electrode rod is required to be controlled within 0.05mm / m, so as to improve the powder sphericity and the concentration of particle size distribution.

[0038] (3) Powder preparation

[0039] Place the above-prepared electrode rod in an argon or helium inert gas-tight reaction chambe...

Embodiment 1

[0051] This embodiment provides a high-strength high-plasticity titanium alloy powder for rapid prototyping by laser melting deposition, which consists of the following components by mass percentage: Al5.0-5.4wt%, Si0.36-0.4wt%, Zr1.5 ~2.0wt%, Mo3.5~4.0wt%, O0.06~0.08wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, the rest is Ti matrix, The sum of the mass percentages of the above components is 100%. Its preparation method includes:

[0052] Step 1: Master Alloy Billet Melting

[0053] According to the main element composition: Al5.0~5.4wt%, Si0.36~0.40wt%, Zr1.5~2.0wt%, Mo3.5~4.0wt%, the rest is Ti matrix, secondary element composition: O0 .06~0.07wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, perform alloy proportioning, and prepare master alloy billets;

[0054] Step 2: Electrode Rod Preparation

[0055] The master alloy billet is prepared into an electrode rod, and the straightness deviation of the electrode rod is 0.04mm / m;

[0056] Step 3: Powder Preparatio...

Embodiment 2

[0062] This embodiment provides a high-strength high-plasticity titanium alloy powder for rapid repair by laser melting deposition, which consists of the following components by mass percentage: Al5.5-6.0wt%, Si0.25-0.35wt%, Zr0.8 ~1.4wt%, Mo4.1~4.5wt%, O0.03~0.05wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, the rest is Ti matrix, The sum of the mass percentages of the above components is 100%. Its preparation method includes:

[0063] Step 1: Master Alloy Billet Melting

[0064] According to the main element composition: Al5.5~6.0wt%, Si0.25~0.35wt%, Zr0.8~1.4wt%, Mo4.1~4.5wt%, the rest is Ti matrix, secondary element composition: O0 .03~0.04wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, perform alloy proportioning, and prepare master alloy billet;

[0065] Step 2: Electrode Rod Preparation

[0066] The master alloy billet is prepared into an electrode rod, and the straightness deviation of the electrode rod is 0.02mm / m;

[0067] Step 3: Powder Preparation

...

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Abstract

The invention relates to high-strength high-plastic titanium alloy powder for laser rapid prototyping and repairing, and a preparation method thereof. The powder is prepared from the following components by mass percentage: 5.0-6.2 wt% of Al; 0.25-0.40 wt% of Si; 0.8-2.0 wt% of Zr; 3.5-4.5 wt% of Mo; 0.03-0.08 wt% of O; less than or equal to 0.005 wt% of C, less than or equal to 0.006 wt% of H, less than or equal to 0 .02 wt% of N, less than or equal to 0.05 wt% of Fe, and the balance of a Ti matrix, wherein the sum of the mass percentages of the above components is 100%. The high-strength high-plastic titanium alloy powder improves the plastic reserve of laser melting deposited titanium alloy, and the deposited plasticity and the comprehensive mechanical property are almost the same as those of similar grade forgings, and the severe cracking failure problem, which easily appears, of a large titanium alloy structural member in a continuous long-time laser melting deposition forming process is eliminated, almost no subsequent heat treatment is needed after damaged parts are repaired, and uniform performance of a repaired zone and a base zone can be achieved.

Description

technical field [0001] The invention belongs to the technical field of metal powder materials, and relates to a high-strength and high-plasticity titanium alloy powder used for laser rapid prototyping and repairing and a preparation method thereof. Background technique [0002] Laser melting deposition technology, using alloy powder as raw material, through high-power laser in-situ metallurgical melting / rapid solidification layer by layer, directly driven by the three-dimensional CAD model of the part, one step to realize the near-net shape manufacturing of large complex structures, is an advanced laser Rapid prototyping technology has outstanding advantages in the rapid and high-performance overall manufacturing of large titanium alloy main load-bearing structures in aerospace and the repair and regeneration of damaged titanium alloy castings / forgings. The deposited titanium alloy prepared by this technology has the typical characteristics of "high strength and low plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00B22F9/14B22F1/00B33Y70/00
CPCC22C14/00B22F9/14B33Y70/00B22F1/065
Inventor 周庆军严振宇王福德王国庆韩旭文帅赵衍华赵彦广马存强宋全薛青侯谊飞黑艳颖何京文
Owner CAPITAL AEROSPACE MACHINERY
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