Regional control method for additive manufacturing of in-situ self-generated TiC reinforced titanium-based composite material

A titanium-based composite material and additive manufacturing technology, which is applied in the field of zonal control of in-situ self-generated TiC-reinforced titanium-based composite materials in additive manufacturing, can solve the problem of difficult control of distribution uniformity, difficulty in meeting technical requirements, limited size, etc. problem, to achieve the effect of uniform size distribution of the reinforcement phase and optimized regional performance

Active Publication Date: 2020-07-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the in-situ self-generated particle-reinforced titanium-based composites prepared by the traditional method, due to the slow solidification rate, the reinforced phase will continue to grow, so that its size is limited, and the uniformity of distribution is difficult to control, making it difficult to precisely control the titanium matrix composites. Properties of different parts of matrix composites
Therefore, it is difficult to meet the requirements with the above technologies when it is desired to precisely control the material in different regions, ensure the performance requirements of different regions, and prepare particle-reinforced titanium-based composites with uniform reinforcement phase distribution and good bonding with the matrix.

Method used

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  • Regional control method for additive manufacturing of in-situ self-generated TiC reinforced titanium-based composite material
  • Regional control method for additive manufacturing of in-situ self-generated TiC reinforced titanium-based composite material
  • Regional control method for additive manufacturing of in-situ self-generated TiC reinforced titanium-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment includes the following steps:

[0034] Step 1: Add 79.2g of pure titanium powder with a size of 15 μm to 45 μm and a mass purity of 99.5% and 0.8g of nano-carbon powder with an average size of 40nm into 20mL of absolute ethanol, and then place it in a ball mill. Under the conditions of 100r / min and ball-to-material ratio of 1:1.5, perform ball milling treatment for 5 hours, then dry once at 60°C for 6 hours to obtain ball mill powder, and then spray 0.8g into the ball mill powder with a volume fraction of 2.7% The polyvinyl alcohol aerosol was stirred evenly, and the temperature was 100°C for secondary drying for 3 hours to obtain a C / Ti composite powder with a nano-carbon mass content of 1%;

[0035] Step 2. Replace the mass of pure titanium powder in step 1 with 78.4g, 77.6g, 76.8g, 76g, 75.2g, 74.4g, 73.6g, 72.8g, 72g, 71.2g, 70.4g, corresponding to nano carbon The quality of the powder is changed to 1.6g, 2.4g, 3.2g, 4.0g, 4.8g, 5.6g, 6.4g, 7.2g, 8....

Embodiment 2

[0060] This embodiment includes the following steps:

[0061] Step 1. Add 79.4g of pure titanium powder with a size of 75 μm to 100 μm and a mass purity of 99.5% and 0.6g of nano-carbon powder with an average size of 40nm into 60mL of absolute ethanol, and then place it in a ball mill. Under the conditions of 300r / min and ball-to-material ratio of 1:3, perform ball milling treatment for 2 hours, then dry once at 100°C for 3 hours to obtain ball mill powder, and then spray 2.4g of aerosol into the ball mill powder and stir evenly. Carrying out secondary drying for 1 hour at a temperature of 120°C to obtain a C / Ti composite powder with a nano-carbon mass content of 0.75%;

[0062] Step 2. Replace the quality of the pure titanium powder in step 1 with 79.2g, 78.4g, 77.6g, 78.4g, 79.2g, 79.4g, and replace the corresponding nano-carbon powder with 0.8g, 1.6g, 2.4 g, 1.6g, 0.8g, 0.6g, according to the process of preparing C / Ti composite powder in step 1, the obtained nano-carbon ma...

Embodiment 3

[0068] This embodiment includes the following steps:

[0069] Step 1: Add 77.6g of Ti60 powder with a size of 100μm to 200μm and a mass purity of 99.5% and 2.4g of nano-carbon powder with an average size of 40nm into 40mL of absolute ethanol, and then place it in a ball mill at a speed of 200r / min and ball-to-material ratio of 1:2, ball milling was carried out for 3 hours, and then dried once at 85°C for 4.5 hours to obtain ball milling powder, and then 1.6g of aerosol was sprayed into the ball milling powder and stirred evenly. Carrying out secondary drying for 2 hours at a temperature of 110°C to obtain a C / Ti composite powder with a nano-carbon mass content of 3%;

[0070] Step 2. Replace the quality of the Ti60 powder in step 1 with 76.8g, 79.2g, 77.2g, 78.8g, 77.6g, 78.4g, 78g, 80g, and replace the corresponding nano-carbon powder with 1.6g, 0.8 g, 0.6g, 0.4g, 0.6g, 0.8g, 1.6g, 2.4g, according to the process of preparing C / Ti composite powder in step 1, the mass content...

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Abstract

The invention discloses a regional control method for additive manufacturing of an in-situ self-generated TiC reinforced titanium-based composite material. The method comprises the following steps: I,ball-milling and drying after uniformly mixing titanium powder with nano carbon powder or uniformly mixing titanium alloy powder with nano carbon powder, spraying aerosol to uniformly mix, and dryingto obtain C / Ti composite powder; II, preparing a series of C / Ti composite powder with different nano carbon mass contents; III, separately selecting a powder mixture of one or more of one series of C / Ti composite powder with different nano carbon mass contents as a raw material, and adopting a high energy beam additive manufacturing method to prepare the in-situ self-generated TiC reinforced titanium-based composite material. Nano carbon mass content in the raw material is controlled on line by selecting the powder mixture of one or more of one series of C / Ti composite powder with different nano carbon mass contents, and different-area TiC dimension, morphology and content of the titanium-based composite material are precisely controlled, so that regional control on the in-situ self-generated TiC reinforced titanium-based composite material is realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium-based materials, and in particular relates to a partition control method for in-situ self-generated TiC reinforced titanium-based composite materials manufactured by additive manufacturing. Background technique [0002] With the development of contemporary high-tech, the field of science is constantly changing. In the practical application of titanium-based composite materials, different parts of the same material have different properties or performances, and the perfect combination of two sides of different performances arises at the historic moment, that is It is required to be able to control the titanium matrix composites in different regions. At present, there are many ways to adjust the proportion of the external reinforcement phase in different regions to prepare such titanium matrix composites, but the size of the internal reinforcement phase of the titanium matrix composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y50/02C22C1/05C22C14/00C22C32/00
CPCC22C1/058B33Y50/02C22C14/00C22C32/0052B22F10/00B22F10/32B22F10/34B22F10/28Y02P10/25
Inventor 谭华王永霞林鑫黄卫东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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