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Laser formation method of TiC-NiMo composite component

A technology of laser forming and laser head, which is applied in the direction of additive processing, improvement of process efficiency, and improvement of energy efficiency. Eliminates the effect of uneven distribution of TiC

Inactive Publication Date: 2016-02-17
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-NiMo composite parts

Method used

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  • Laser formation method of TiC-NiMo composite component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a TiC - The laser forming method of the NiMo composite material pantograph slider includes the following processes:

[0021] (1) Raw material formula and pretreatment

[0022] The raw material formula is: graphite 5.12wt.%, Ti powder 22.48wt.%, Mo powder 8.71wt.%, mixed rare earth 0.24wt.%, Ni balance; the raw material is in the form of powder, and the particle size of the metal powder is 20 microns; Ti powder and mixed rare earth powder are ball-milled together for 0.5-6 hours, and metallic Ni powder and Mo powder are ball-milled together for 0.5-6 hours.

[0023] (2) Powder feeding and mixing

[0024] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are placed in the first hopper, graphite powder is placed in the second hopper, and Ni and Mo powder are placed in the third hopper. ;Three screw powder feeders feed powder at the same time, and adjust the equivalent of TiC powder in the ...

Embodiment 2

[0029] a TiC - NiMo composite crystallizer laser forming method, including the following processes:

[0030] (1) Raw material formula and pretreatment

[0031] The raw material formula is: graphite 5.7wt.%, Ti powder 24.9wt.%, Mo powder 4.78wt.%, mixed rare earth 0.50wt.%, Ni powder balance; the raw material is in powder form, and the powder particle size is 30 microns; the metal Ti powder and mixed rare earth powder were ball milled together for 3 hours, and metal Ni powder and Mo powder were ball milled together for 4 hours.

[0032] (2) Powder feeding and mixing

[0033] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are placed in the first hopper, graphite powder is placed in the second hopper, and Ni and Mo powder are placed in the third hopper; Three screw powder feeders feed powder at the same time, and adjust the equivalent of TiC powder in the mixer through the screw speed;

[003...

Embodiment 3

[0038] a TiC - The laser forming method of the NiMo composite power receiving shoe skateboard includes the following processes:

[0039] (1) Raw material formula and pretreatment

[0040] The raw material formula is: graphite 6.45wt.%, Ti powder 27.8wt.%, Mo powder 8.66wt.%, mixed rare earth 0.69wt.%, Ni balance; the raw material is in the form of powder, and the particle size of the metal powder is more than 55 microns; Metal Ti powder and mixed rare earth powder were ball milled together for 2 hours, and metal Ni powder and Mo powder were ball milled together for 1.5 hours.

[0041] (2) Powder feeding and mixing

[0042]The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Ti powder and mixed rare earth powder are placed in the first hopper, graphite powder is placed in the second hopper, and Ni and Mo powder are placed in the third hopper; Three screw powder feeders feed powder at the same time, and adjust the equivalent of TiC pow...

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Abstract

The invention relates to a novel laser formation of a TiC-NiMo composite component. A raw material formula of raw powder used in the method comprises the following raw materials in percentage by weight: 5.12 to 6.45wt.% of graphite, 22.48 to 27.80wt.% of Ti, 4.78 to 8.71wt.% of Mo, 0.24 to 0.69wt.% of rare earth oxide, and the balance Ni. According to the method, the quantitative conveying and mixing of the powder used for laser forming are carried out through a multi-hopper spiral powder conveying and mixing system; a coaxial discontinuous powder spraying head is used as a nozzle for the laser forming; the system is used for controlling the powder conveying and the laser, thus the formation of layering structures of the inner part and the outer part of a composite part can be achieved; the mechanical property of a composite can exceed 60% of that 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-NiMo component. Background technique [0002] TiC has a very high melting point, excellent high temperature strength, thermal stability, low density, high elastic modulus, high hardness and good wear resistance. Nickel-based superalloys and their composite materials are used in aerospace, petroleum, chemical, metallurgy, electric power and other fields due to their good high temperature creep resistance, corrosion resistance, high yield strength and fracture toughness. [0003] The preparation technology of MMC can be divided into in-situ self-generation and forced addition according to the different ways of adding reinforcing particles. The in-situ self-generation technology uses alloy design to react and nucleate in situ in the matrix metal to generate one or several thermodynamically stable reinforcement phases. This method avoids the decomposition of...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/105B33Y10/00
CPCY02P10/25
Inventor 娄德元刘顿廖加劲肖晨光翟中生P·贝内特贺春林
Owner HUBEI UNIV OF TECH