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Metal ceramic composite alloy spherical powder and preparation method thereof

A metal-ceramic composite, spherical powder technology, applied in metal processing equipment, metal material coating technology, coating and other directions, can solve the difficult to achieve high density and high mechanical properties, difficult to meet the requirements of 3D printing technology raw materials, It is difficult to integrally prepare and form problems, so as to achieve the effects of uniform microstructure, reduced preparation cost, and high product performance consistency.

Active Publication Date: 2017-01-04
成都锦钛精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some complex-shaped cermet workpieces are difficult to be integrally prepared by traditional powder metallurgy technology, and the traditional powder metallurgy raw materials used are difficult to meet the requirements of 3D printing technology for their raw materials
In the rapid prototyping process of 3D printing, it is difficult for traditional powder metallurgy raw materials to achieve the high density and high mechanical properties of traditional powder metallurgy products
Therefore, the cermet raw materials for 3D printing generally require uniform spherical powders, and the commonly used methods of powder spheroidization (such as airflow spheroidization) are relatively expensive, and commercial applications are greatly restricted.

Method used

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  • Metal ceramic composite alloy spherical powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] ①The ingredients are mixed and dried

[0042] Weigh 4kg Co powder and 6kg Ti(C 0.7 ,N 0.3 ) powder, add Polyethylene Glycol 500g, each raw material is mixed uniformly by ball-milling mixing method, ball-milling agent alcohol, and then vacuum-dry to obtain compound;

[0043] ②Spherification

[0044] The mixture prepared in step ① is crushed and sieved into powder, and the mesh size of the sieve is 300 mesh; then the powder is spheroidized by the method of roller spherification, and sieved with a 30-mesh sieve, and taken through the sieve Net powder; then sieve with a 50-mesh sieve, and take the powder that has not passed through the sieve to obtain a spherical powder with uniform particle size distribution;

[0045] ③ Remove molding agent and heat treatment

[0046] Put the spherical powder prepared in step ② into a vacuum sintering furnace, evacuate to below 1×10-1Pa, raise the temperature to 600°C and keep it for 2 hours to remove the added molding agent; then redu...

Embodiment 2

[0049] ①The ingredients are mixed and dried

[0050] Weigh TiC0.5N0.5 powder: 9.5kg; Co powder: 0.4kg; Fe powder: 0.1kg, add polyethylene glycol 50g, mix each raw material evenly by ball milling method, the ball milling agent is alcohol, and then vacuum dry dry mix;

[0051] ②Forming

[0052] Sieve and granulate with a 30-mesh sieve, and then compact the granulated pellets;

[0053] ③Pre-firing and crushing

[0054] Put the compact prepared in step ② into a vacuum sintering furnace, evacuate to below 1×10-1Pa, raise the temperature to 350°C and keep it for 8 hours to remove the added molding agent; then reduce the air pressure to below 1×10-1Pa , and then raised the temperature to 800 for firing for 4 hours; then cooled with the furnace, and the sintered compact was broken into particles of 30 microns.

[0055] ④ Discharge plasma spheroidization

[0056] The composite cermet particles prepared in step ③ are spheroidized in a stably operating radio frequency plasma spheroi...

Embodiment 3

[0058] ①The ingredients are mixed and dried

[0059] Weigh (Ti, 20W, 15Mo, 5Ta) C0.7N0.3 powder: 6kg; Co powder: 2.5kg; Ni powder: 1kg; Mo powder 0.5kg, paraffin wax 200g, mix each raw material by ball mill mixing method, The ball milling agent is acetone, and then vacuum-dried to obtain the mixture;

[0060] ②Forming

[0061] Sieve and granulate with an 80-mesh sieve, and then compact the granulated pellets;

[0062] ③Pre-firing and crushing

[0063] Put the green compact prepared in step ② into a vacuum sintering furnace, then continuously feed and maintain the flowing Ar gas with a pressure of 500Pa in the vacuum furnace, raise the temperature to 600°C and keep it for 2 hours to remove the added molding agent; Lower the temperature below 1×10-1Pa, then raise the temperature to 1350°C for sintering for 0.5 hours; then cool with the furnace, and break the sintered compact into 100 micron particles.

[0064] ④ Discharge plasma spheroidization

[0065] The composite cermet...

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Abstract

The invention discloses metal ceramic composite alloy spherical powder and a preparation method thereof. The metal ceramic composite alloy spherical powder is TiCN-Co and at least one of Ni, Mo and Fe or (Ti, Me) CN-Co and at least one of Ni, Mo and Fe or TiCN-MxC-Co and at least one of Ni, Mo and Fe or (Ti, Me) CN-MxC-Co and at least one of Ni, Mo and Fe or (Ti, Me) CN-TiCN-MxC-Co and at least one of Ni, Mo and Fe. Mixed materials are dried, the powder is spherized by the aid of a roller spherizing method, a radio frequency plasma spherizing method or a spray granulation spherizing method, and the spherized powder is sintered to obtain the metal ceramic composite alloy spherical powder. The metal ceramic composite alloy spherical powder serves as a coating material, binding force between a coating and a substrate is improved, and the quality of 3D (three-dimensional) printing products can be improved when the spherical powder serves as a 3D printing material.

Description

technical field [0001] The invention belongs to the fields of thermal spraying materials, coating materials and 3D printing materials, and in particular relates to a metal-ceramic composite alloy spherical powder and a preparation method thereof. Background technique [0002] The failure mode of metal workpieces is mainly caused by wear. Although heat treatment, modification treatment, doping and other means can improve its wear resistance, the improvement of surface hardness is very limited, which limits its potential. Furthermore, the coating technology on the workpiece surface came into being, and cermets were also used as commonly used coating materials. Generally, the higher the hardness of the cermet material, the stronger the ability of its surface to resist deformation and the better the wear resistance. When it is used as a coating, it is more conducive to improving the wear resistance of the workpiece surface; and its toughness (strength and The higher the toughn...

Claims

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Application Information

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IPC IPC(8): B22F1/00C22C29/04C22C29/02B22F9/04B22F9/14B22F9/10
CPCC22C1/051C22C29/005C22C29/02C22C29/04C23C4/06B22F9/04B22F9/082B22F9/10B22F9/14B33Y70/00B22F2999/00B22F2009/043B22F1/065B22F1/142
Inventor 赵明建陈一可
Owner 成都锦钛精工科技有限公司
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