Laser forming method for TiC-FeCr-Gr composite material component

A laser forming and laser head technology, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve the problems of uneven distribution of reinforcement phases, reducing the performance of graphite TiC-FeCr-Gr composite parts, and changing the design components of reinforcement phases. , to achieve the effect of eliminating the uneven distribution of the enhanced phase

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 (Gr) is large. During the laser forming process, it is easy to cause delamination 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 reinforcement phase. The design composition of the graphite TiC-FeCr-Gr composite material greatly reduces the performance of the component

Method used

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  • Laser forming method for TiC-FeCr-Gr composite material component

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A TiC-FeCr-Gr composite material annealing furnace roll laser forming method, comprising the following processes:

[0021] (1) Raw material formula and pretreatment

[0022] The raw material formula is: graphite 0.91wt.%, Ti5.88wt.%, Cr23.21wt.%, rare earth oxide 0.33wt.%, Fe balance; the raw material is in powder form, and the particle size of metal powder and graphite powder is 60 microns; Metal Ti powder and mixed rare earth powder were ball milled together for 2 hours; Fe powder and Cr powder were ball milled together for 1.5 hours.

[0023] (2) Powder feeding and mixing

[0024] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Put Ti powder and mixed rare earth powder into the first hopper, graphite powder into the second hopper, and Fe and Cr mixed powder into the third hopper ; Three powder feeders feed powder at the same time, and adjust the content of TiC in the forming part through the screw speed.

[0025] (3) L...

Embodiment 2

[0029] A TiC-FeCr-Gr composite thermoforming die laser forming method, comprising the following processes:

[0030] (1) Raw material formula and pretreatment

[0031] The raw material formula is: graphite 1.26wt.%, Ti9.81wt.%, Cr19.23wt.%, mixed rare earth 0.13wt.%, Fe balance; the raw material is in powder form, the particle size of metal powder and graphite powder is 60 microns; Metal Ti powder and mixed rare earth powder were ball milled together for 3 hours; Fe powder and Cr powder were ball milled together for 1 hour.

[0032] (2) Powder feeding and mixing

[0033] The powder feeding process is completed by a multi-hopper screw powder feeding mixing system. Put Ti powder and mixed rare earth powder into the first hopper, graphite powder into the second hopper, and Fe and Cr mixed powder into the third hopper ; Three screw powder feeders feed powder at the same time, and adjust the content of TiC in the forming part through the screw speed.

[0034] (3) Laser forming

...

Embodiment 3

[0038] A kind of laser forming method of TiC-FeCr-Gr composite material hot-rolled conveying roll, comprises following process:

[0039] (1) Raw material formula and pretreatment

[0040] The raw material formula is: graphite 3.61wt.%, Ti powder 4.32wt.%, Cr powder 13.47wt.%, mixed rare earth 0.15wt.%, Fe powder 78.45wt.%. Raw materials are in powder form, metal powder and graphite powder particles The size is 200 microns; the metal Ti powder and the mixed rare earth powder are ball milled together for 3 hours; the Fe powder and Cr powder are ball milled together for 1 hour.

[0041] (2) Powder feeding and mixing

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

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Abstract

The invention relates to a laser forming method for a TiC-FeCr-Gr metal composite material component. Raw material powder selected in the method comprises 0.91-3.61 wt.% of graphite, 4.32-9.81 wt.% of Ti powder, 13.47-23.21 wt.% of Cr powder, 0.13-0.33 wt.% of rare earth oxide and the balance Fe powder. Quantitative feeding and mixing for the powder subjected to laser forming are completed through a multi-hopper spiral powder feeding and mixing system. Coaxial discontinuous powder spray nozzles serve as spray nozzles for laser forming. Formation of layered structures of the inner portion and the outer portion of the composite component is achieved by controlling powder feeding and laser through the system. The mechanical properties of the composite material can reach over 60% of that of matrix metal materials.

Description

technical field [0001] The invention belongs to the field of laser forming, and relates to a laser forming method of a TiC-FeCr-Gr composite material 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 avoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22C38/28
CPCB22F3/105C22C38/28Y02P10/25
Inventor 娄德元杨奇彪赵城张德生陈列P·贝内特刘顿
Owner HUBEI UNIV OF TECH
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