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Improvement method for titanium alloy laser 3D printing

A 3D printing, titanium alloy technology, applied in the field of titanium alloy laser 3D printing improvement, can solve the problems of narrow optional range of subsequent heat treatment process parameters, low strength level and heat resistance temperature, low plasticity level of alloys and components, etc. Strength and other mechanical properties, increased service temperature, good wettability and effects of pinning

Active Publication Date: 2015-09-23
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the titanium alloys and components prepared by laser 3D printing have low strength level and low heat-resistant temperature; the metallographic structure is coarse and uneven; the metallographic structure grows during the subsequent heat treatment modification process; the subsequent heat treatment process parameters are optional The range is narrow, the improvement of mechanical properties is limited; the plasticity level of alloys and components is low; and an improved method for laser 3D printing of titanium alloys is provided

Method used

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  • Improvement method for titanium alloy laser 3D printing

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specific Embodiment approach 1

[0017] Specific implementation mode 1: In this implementation mode, the titanium alloy laser 3D printing improvement method is carried out according to the following steps:

[0018] 1. The titanium or titanium alloy powder and the improved raw material powder are ball milled and mixed evenly;

[0019] 2. Laser 3D printing, the laser power is 250-1000W, the scanning speed is 0.1-1.0m / min, printing in vacuum or protective atmosphere; the improvement of titanium alloy laser 3D printing can be realized;

[0020] Among them, the improved raw materials are B, TiB 2 , B 4 C, C and / or SiC.

[0021] Calculate the mass ratio of the improved raw material powder to the titanium or titanium alloy powder according to the volume ratio of the improved phase generated by the reaction between the improved raw material and titanium or titanium alloy in the design, and then weigh the titanium or titanium alloy powder and the improved raw material powder for ball milling and mixing .

[0022] ...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the particle size of the titanium or titanium alloy powder after ball milling in step 1 is 30-100 μm, and the particle size of the modified raw material powder is 0.5-8 μm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the titanium alloys in Step 1 are TA series titanium alloys, TB series titanium alloys and TC series titanium alloys. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an improvement method for titanium alloy laser 3D printing and relates to an improvement method for laser 3D printing. The improvement method for titanium alloy laser 3D printing solves the problems that titanium alloy and components prepared through laser 3D printing at present are low in strength level and heat resistant temperature, the metallographic structure is thick and big and not even, the metallographic structure grows to be big in the subsequent heat treatment modification process, the technological parameter selectable range in subsequent heat treatment is narrow, the mechanical property improvement is limited, and the plasticity level of the alloy and the components is low. The improvement method includes the steps that firstly, titanium or titanium alloy powder is evenly mixed with improved raw material powder in a ball milling mode; secondly, laser 3D printing is conducted. The metallographic structure of a laser 3D titanium metal product prepared through the mode of execution is thin and small, a subsequent heat treatment window can be greatly expanded, a balanced structure formed by high-temperature annealing can be achieved, long-time solution strengthening processing or annealing processing can be conducted, the even metallographic structure is obtained, and the mechanical performance of the metallographic structure is greatly improved.

Description

technical field [0001] The invention relates to an improved method for titanium alloy laser 3D printing. Background technique [0002] Titanium and titanium alloys have many outstanding advantages such as light weight, high strength, corrosion resistance, and non-magnetic properties, and are widely used in aviation, aerospace, navigation, automobiles, chemicals, biomedicine, and other fields. However, compared with other commonly used metals, titanium and titanium alloys also have disadvantages such as high price and difficult processing; especially for components with complex shapes, it is not only difficult to process them by material removal machining, but also causes serious waste of raw materials. The casting method not only has low yield but also has many casting defects and low performance. The forging method can only be used to prepare components with simple shapes and small deformations. [0003] Laser additive manufacturing, that is, laser 3D printing technology,...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C14/00B22F3/105B33Y10/00
Inventor 黄陆军戎旭东耿林段天博王帅崔喜平
Owner HARBIN INST OF TECH
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