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Laser forming method of TiC-Ti composite component

A composite material component and laser forming technology, which is applied in the direction of additive processing, etc., can solve the problems of large difference in bulk density, change of the design composition of the reinforcement phase, and uneven distribution of the reinforcement phase, so as to achieve controllable distribution and eliminate uneven distribution of TiC Effect

Inactive Publication Date: 2016-02-24
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bulk density difference between metal powder and graphite powder is large. During the laser forming process, it is easy to cause stratification due to the large difference in powder density, which will cause uneven distribution of the reinforcement phase in the formed part, and will change the design of the reinforcement phase. composition, greatly reducing the performance of TiC-Ti composite parts

Method used

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  • Laser forming method of TiC-Ti composite component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A TiC-Ti composite material automotive engine intake valve laser forming method, comprising the following processes:

[0020] 1. Raw material formula and pretreatment

[0021] The raw material formula is: 3.51wt.% of graphite, 0.15wt.% of mixed rare earth, and the balance of Ti; the raw material is in the form of powder, and the particle size of the powder is 50 microns; the metal Ti powder and the mixed rare earth powder are ball milled for 2 hours.

[0022] 2. Powder feeding and mixing

[0023] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are put into the first hopper, graphite powder is placed in the second hopper; two screw powder feeders feed powder at the same time, and pass through Adjust the screw speed to adjust the content of TiC generated locally in the component;

[0024] 3. Laser forming

[0025] The laser head of the laser forming adopts 2 coaxial discontinuous nozzle...

Embodiment 2

[0028] A TiC-Ti composite material automotive engine connecting rod laser forming method, comprising the following processes:

[0029] 1. Raw material formula and pretreatment

[0030] The raw material formula is: graphite 2.36wt.%, mixed rare earth 0.11wt.%, Ti balance; the raw material is in the form of powder, and the powder particle size is 40 microns; metal Ti powder and mixed rare earth powder are ball milled together for 3 hours;

[0031] 2. Powder feeding and mixing

[0032] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are put into the first hopper, graphite powder is placed in the second hopper; two screw powder feeders feed powder at the same time, and pass through Adjust the screw speed to adjust the content of TiC generated locally in the component;

[0033] 3. Laser forming

[0034] The powder in the multi-hopper is air-carried to the laser head with 3 pipelines for laser for...

Embodiment 3

[0037] A TiC-Ti high temperature valve sleeve laser forming method, comprising the following process:

[0038] 1. Raw material formula and pretreatment

[0039] The raw material formula is: 4.55wt.% of graphite, 0.22wt.% of mixed rare earth, and the balance of Ti; the raw material is in the form of powder, and the powder particle size is 200 microns; the metal Ti powder and the mixed rare earth powder are ball milled together for 4 hours.

[0040] 2. Powder feeding and mixing

[0041] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are put into the first hopper, graphite powder is placed in the second hopper; two screw powder feeders feed powder at the same time, and pass through The screw speed adjusts the content of TiC generated locally in the component.

[0042] 3. Laser forming

[0043]The powder in the multi-hopper is air-carried to the laser head with two pipelines for laser forming. ...

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Abstract

The invention relates to a laser forming method of a TiC-Ti metallic composite structural component. The adopted formula of raw material powder comprises 2.36-4.55wt% of graphite, 0.11-0.22wt% of rare earth oxide and the balance of Ti. Quantitative powder distribution and mixing, required by laser forming are finished by a multi-hopper spiral powder conveying and mixing system, and coaxial discontinuous powder sprayers are used as laser forming nozzles. The forming of the inner and outer layered structure of the composite component is realized by using the system to control powder conveying and laser, and the dynamic performance of the composite can reach more than 70% of a base metal material.

Description

technical field [0001] The invention belongs to the field of laser forming and relates to a laser forming method of a TiC-Ti component. Background technique [0002] Ti-based composite materials have low density, high specific strength and specific modulus, excellent fatigue and creep properties, and can be used in aerospace, advanced weapon systems and automobile manufacturing fields. TiC has a very high melting point, excellent high temperature strength, thermal stability, low density, high elastic modulus, high hardness and good wear resistance. TiC has become the preferred reinforcing phase of titanium matrix composites because of its excellent properties and good matching with titanium alloy matrix. In-situ self-generated particle reinforced titanium matrix composites have more excellent comprehensive properties than titanium alloys. [0003] The preparation technology of MMC can be divided into in-situ self-generation and forced addition according to the different wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105B33Y10/00
Inventor 娄德元翟中生朱思雄黄敏杨奇彪P·贝内特刘顿
Owner HUBEI UNIV OF TECH
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