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A kind of high-strength high-plastic titanium alloy powder for laser rapid prototyping and repair and preparation method thereof

A laser rapid prototyping and titanium alloy technology, which is applied in the field of metal powder materials, can solve the problems of mismatch between plasticity and comprehensive mechanical properties, and achieve the effect of eliminating serious cracking failure problems, increasing plastic reserves, and reducing viscosity

Active Publication Date: 2021-02-09
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 repair, which specifically includes the following steps:

[0034](1) Master alloy bar 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, minor element component: O0 .03~0.07wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, carry out the alloy ratio to prepare the master alloy bar;

[0036](2) Electrode preparation

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

[0038](3) Powder preparation

[0039]Place the electrode rod prepared above in an argon or helium inert gas sealed reaction chamber and rotate, heat and melt the end of the electrode rod, the ...

Embodiment 1

[0051]This embodiment provides a high-strength and high-plasticity titanium alloy powder for rapid prototyping by laser melting and deposition, which is composed of the following components in terms of 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 above component mass percentages is 100%. The preparation method includes:

[0052]Step 1: Master alloy bar smelting

[0053]According to the main element component: Al5.0~5.4wt%, Si 0.36~0.40wt%, Zr1.5~2.0wt%, Mo3.5~4.0wt%, the rest is Ti matrix, minor element component: O0 .06~0.07wt%, C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, carry out alloy proportioning to prepare master alloy bar stock;

[0054]Step 2: Electrode preparation

[0055]Preparing the master alloy bar blank into an electrode rod with a deviation of straightness of 0.04 mm / m;

[0056]Step 3: Powder preparation

[0057]The prepared electrode rod is placed in a ...

Embodiment 2

[0062]This embodiment provides a high-strength and high-plasticity titanium alloy powder for rapid repair by laser melting and deposition, which is composed of the following components according to 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 above component mass percentages is 100%. The preparation method includes:

[0063]Step 1: Master alloy bar smelting

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

[0065]Step 2: Electrode preparation

[0066]Preparing the master alloy bar blank into an electrode rod, the straightness deviation of the electrode rod is 0.02 mm / m;

[0067]Step 3: Powder preparation

[0068]The prepared electrode rod i...

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Abstract

A high-strength and high-plastic titanium alloy powder for laser rapid prototyping and repairing and a preparation method thereof. The powder includes the following components by mass percentage: Al 5.0-6.2wt%; Si 0.25-0.40wt%; Zr 0.8- 2.0wt%; Mo 3.5~4.5wt%; O 0.03~0.08wt%; C≤0.005wt%, H≤0.006wt%, N≤0.02wt%, Fe≤0.05wt%, the rest is Ti matrix, the above components The sum of the mass percentages is 100%. The invention improves the plastic reserve of the laser-melted deposited titanium alloy, and its plasticity and comprehensive mechanical properties in the deposited state are almost the same as those of forgings of similar grades, and eliminates the extremely easy occurrence of large-scale titanium alloy structural parts in the continuous long-term laser melting deposition forming process Severe cracking and failure problems, almost no subsequent heat treatment is required after the damaged parts are repaired, and the performance of the repaired area and the matrix area can be uniform.

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 forming and repair and a preparation method thereof.Background technique[0002]Laser melting deposition technology, using alloy powder as raw material, is stacked layer by layer through high-power laser in-situ metallurgical melting / rapid solidification, and is directly driven by the part 3D CAD model to realize the near-net shape manufacturing of large complex structures in one step. It is an advanced laser Rapid prototyping technology has outstanding advantages in the rapid and high-performance overall manufacturing of aerospace large-scale titanium alloy main bearing structures 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 plasticity". After the parts ar...

Claims

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Application Information

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Patent Type & Authority Patents(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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