Preparation method for gradient nozzle

A nozzle and gradient technology, applied in the field of parts preparation, can solve the problems of poor erosion resistance and high temperature resistance of nozzles, etc., and achieve the effects of improving thermal stability, low energy consumption, and simple process

Active Publication Date: 2017-09-29
HEBEI COLLEGE OF IND & TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor high temperature resistance and poor erosi...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Design the gradient nozzle, the composition from the outer layer to the inner layer is pure Cu, 0.5wt%Al 2 o 3 -Cu, 1.0wt%Al 2 o 3 - Cu, 1.5 wt% Al 2 o 3 -Cu, 2.0wt%Al 2 o 3 - Cu, 2.5 wt% Al 2 o 3 -Cu, uniformly mix the corresponding metal powder and ceramic reinforcing particles to prepare 6 kinds of composite powders with different content of ceramic particle reinforcing particles, and carry out high-energy ball milling mechanical alloying of the composite powders, the particle size of each layer of powder is 325 mesh;

[0024] (2) The outer diameter of the prepared nozzle is 14mm, the inner diameter is 5mm, and the height is 100mm, and the innermost layer composition is 2.5 wt% Al 2 o 3 -The thickness of Cu is 2mm, and the thickness of other layers is 0.5mm. From the outside to the inside, the amount of composite powder added in each layer is 18.9g, 17.5g, 16.1g, 14.7g, 13.3g, 39.1g. The gel solution is 0.44, 0.45, 0.46, 0.48, 0.51, 0.52 (the percentage...

Embodiment 2

[0029] (1) Design the iron-tungsten carbide gradient nozzle, the composition from the outer layer to the inner layer is pure Fe, 4wt%WC-Fe, 7wt%WC-Fe, 10wt%WC-Fe, 13wt%WC-Fe, 16wt% WC-Fe, 19wt%WC-Fe, 21wt%WC-Fe, 24wt%WC-Fe, 27wt%WC-Fe, the corresponding metal powder and ceramic reinforcement particles are uniformly mixed to prepare 10 kinds of different ceramic particle reinforcement particle content Composite powder, and the composite powder is mechanically alloyed by high-energy ball milling, and the particle size of each layer of composite powder is 200 mesh;

[0030] (2) The outer diameter of the prepared nozzle is 10mm, the inner diameter is 4mm, the height is 100mm, and the thickness of the gradient layer is 0.3mm. The amount of powder added in each layer from the outside to the inside is 7.19g, 6.88g, 6.53g, 6.16 g, 5.78g, 5.40g, 4.99g, 4.55g, 4.12g, 3.68g, the corresponding gel solutions were added in sequence to be 0.36, 0.36, 0.37, 0.38, 0.39, 0.41, 0.43, 0.45, 0.47,...

Embodiment 3

[0035] (1) Design a high-temperature stainless steel-titanium carbide gradient nozzle. The composition from the outer layer to the inner layer is 10wt%TiC-stainless steel, 20wt%TiC-stainless steel, 40wt%TiC-stainless steel, and the corresponding metal powder and ceramic reinforcement particles are uniformly Mix to prepare 3 kinds of composite powders with different content of ceramic particle reinforcement particles, and carry out high-energy ball milling mechanical alloying of the composite powders, the particle size of each layer of composite powders is 150 mesh;

[0036] (2) The outer diameter of the prepared nozzle is 40mm, the inner diameter is 5mm, and the height is 100mm. The thickness of the gradient layer from the outside to the inside is 2.5mm, 5mm, and 10mm. The amount of powder added to each layer is 218.72g from the outside to the inside. . Wherein, the gel solution is formed by mixing acrylamide with a volume fraction of 30% and deionized water with a volume frac...

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Abstract

The invention relates to the field of part preparation in a composite material production technology, and particularly discloses a preparation method for a gradient nozzle. The method comprises the steps that metal powder and ceramic reinforced particles are uniformly mixed according to the design of the gradient nozzle so as to prepare 2-15 kinds of composite powder with different ceramic contents, the powder is subjected to high-energy ball mill mechanical alloying, gel solutions are added into the composite powder separately, the gel solutions and the composite powder are uniformly stirred to form composite material slurry with the good fluidity, then curing agents are sequentially added into the multiple kinds of slurry from outside to inside, the multiple kinds of slurry with the curing agents are sequentially poured into a vertical type centrifugal forming machine rotating at a high speed, and after curing is finished, demolding, drying and vacuum sintering are carried out so as to prepare the gradient nozzle, wherein the number of the gradient layers of the nozzle can reach more than 10, and the thickness of one single sintered layer is 0.3mm-10mm. The method has the advantages that the process is simple, the energy consumption is low, the composite material gradient nozzle with the large height-diameter ratio can be prepared, and the thermal stability and the erosion-abrasion resistance of the nozzle can be improved.

Description

technical field [0001] The invention belongs to the field of component preparation in the composite material production process, and in particular relates to a preparation method of a gradient nozzle. Background technique [0002] Nozzles are key components in the fields of flame spraying or abrasive jet processing. The nozzle materials are required to have good high temperature resistance, high hardness, and wear resistance. These comprehensive properties directly affect the service life and processing effect of the nozzle. Traditional flame spray nozzles often use brass nozzles, which have poor high temperature resistance. Abrasive jet processing often uses ceramics as nozzle materials, but the erosion and wear resistance of ceramic nozzle materials is not ideal. Contents of the invention [0003] Aiming at the problems of poor high-temperature resistance and poor erosion-wear resistance of nozzles, a preparation method of gradient nozzles is provided. [0004] In order...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00B22F3/22B22F5/10
CPCB22F3/22B22F5/10B22F9/04B22F2009/041B22F2999/00B22F2998/10B22F1/107B22F2207/03B22F3/1007B22F2201/20
Inventor 石永亮董中奇杨晓彩时彦林李秀敏戚翠芬陈涛赵晓萍张景进刘燕霞齐素慈黄伟青
Owner HEBEI COLLEGE OF IND & TECH
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