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A kind of b 4 c Ceramic nozzle and preparation method thereof

A ceramic nozzle, high temperature resistance technology, applied in the direction of spray device, spray device, etc., can solve the problems of nozzle erosion and wear, metal liquid flow thickening, fine powder yield decline and other problems, to improve the service life and improve high temperature resistance. Erosive effect

Active Publication Date: 2022-02-18
HUNAN HENGJI POWDER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, B 4 C ceramic nozzle has high hardness and wear resistance, B 4 C ceramic nozzle has the best wear resistance among the current commercial nozzle materials, but B 4 When the ceramic nozzle is atomized and sprayed with molten metal at a temperature higher than 1700°C, the nozzle is severely eroded and worn, causing the aperture of the nozzle to increase rapidly under the action of molten metal erosion. At 1700°C, after spraying for 20 minutes, the aperture of the nozzle decreases from 4.2mm expands to 6mm, resulting in thicker metal flow and lower fine powder yield

Method used

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  • A kind of b <sub>4</sub> c Ceramic nozzle and preparation method thereof
  • A kind of b <sub>4</sub> c Ceramic nozzle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] High temperature resistant flushing B 4 C ceramic nozzle, which is composed of raw materials in parts by weight of the following components: 97.5 parts of submicron B 4 C powder, 2 parts of nanoscale cubic BN powder and 0.5 parts of a sintering aid. Specific powder properties shown below in Table 1.

[0026] Table 1: Example 1 Characteristics of the raw material powder

[0027]

[0028] Scouring temperature above B 4 Method C Preparation of a ceramic nozzle comprising the steps of:

[0029] (1) Mixed powder: Weigh B 4 C powder, BN powder, Al 2 O 3 Powder at a mass ratio of the three powders: 97.5: 2: 0.5 Weigh the appropriate quality stand; the weighed powder into a unified 500mL polyurethanes ball mill jar was added 1.5-2.0 times the total amount of the raw material zirconia balls after a certain amount of absolute ethanol and the sealing body, using a roll mill for mixing material, the drum speed of 300r / min, 5-6h mixing time, the slurry is then removed, after the dry...

Embodiment 2

[0035] High temperature resistant B 4 C ceramic nozzle, its raw material consists of weight based on the following components: 96.5 submicron grade B 4 C powder, 3 nano cubic phase BN powder and 0.5 parts of the burning agent. In the present embodiment, the specific characteristics of the powder are the same as in Example 1.

[0036] High temperature-resistant B 4 The method of preparing the C ceramic nozzle includes the following steps:

[0037] (1) Mix powder: weigh B 4 C powder, BN powder, Al 2 O 3 Powder should be used in accordance with the mass ratio of three powders: 96.5: 3: 0.5, we will use the corresponding quality; put the weighing powder into a 500 ml of polyurethane ball grinding, and then add the total amount of raw material 1.5-2.0 times zirconia ball. After a certain amount of anhydrous ethanol, the can body is sealed, and the material is mixed with a roller ball mill, the drum rotation speed is 300 r / min, the mixing time is 5-6h, then remove the slurry, dry the ...

Embodiment 3

[0042] High temperature resistant B 4 C ceramic nozzle, its feedstock consists of weight gravity by weight: 98.5 submicron-based B 4 C powder, 1 nano cubic phase BN powder with 0.5 parts of the burning agent. In the present embodiment, the specific characteristics of the powder are the same as in Example 1.

[0043] High temperature-resistant B 4 The method of preparing the C ceramic nozzle includes the following steps:

[0044] (1) Mix powder: weigh B 4 C powder, BN powder, Al 2 O 3 Powder is compared with the mass ratio of three powders: 98.5: 1: 0.5, weigh the corresponding quality; put the weighing powder into a 500 ml of polyurethane ball grinding, and then add the total amount of raw material 1.5-2.0 times zirconia ball. After a certain amount of anhydrous ethanol, the can body is sealed, and the material is mixed with a roller ball mill, the drum rotation speed is 300 r / min, the mixing time is 5-6h, then remove the slurry, dry the drying box and ground and abrasive and ov...

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Abstract

The invention discloses a B 4 C ceramic nozzle, the B 4 The raw materials of C ceramic nozzles include the following components in parts by weight: 96.5-98.5 parts of submicron grade B 4 C powder, 1-3 parts of nano-scale cubic phase BN powder and 0.5 part of sintering aid. The present invention also provides a kind of B 4 The preparation method of C ceramic nozzle comprises the following steps: (1) submicron B 4 C powder, nano-scale cubic phase BN powder and sintering aid are ball-milled to obtain a mixed powder; (2) isostatic pressing is used to mix the powder for compression molding, and then hot-pressed and sintered to obtain the above-mentioned B 4 C ceramic nozzle. B of the present invention 4 C ceramic nozzle in the 1700 ℃ atomization spray test, B 4 After C ceramic nozzle was used for 20 minutes, the hole diameter only expanded from 4.2mm to 4.8mm, and the service life of the nozzle at ultra-high temperature (1700°C) was greatly improved compared with the traditional nozzle.

Description

Technical field [0001] The present invention belongs to the atomizing nozzles, and more particularly, to a B 4 C ceramic nozzle and a preparation method. Background technique [0002] It is more spray nozzles, spray, injection, sand blasting, spraying and other devices in a critical component, commonly used in automotive, electroplating, surface treatment, high pressure cleaning, dust, cooling, desulfurization, wetting, stirring, gardens every industry. Preparation of non-atomized powder nozzle type burner nozzles, but due to possible contact with the molten metal, it is necessary to have a certain resistance to corrosion and thermal etching capability. [0003] Common non-plastic material of the nozzle comprises: a metal, and a carbide ceramic nozzle. A ceramic nozzle having the best corrosion and erosion resistant characteristics. A ceramic nozzle having a better abrasion resistance, for example, using quartz sand, slag abrasive material and metal, the ceramic nozzle abrasion r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/622B05B1/00
CPCC04B35/563C04B35/622B05B1/00C04B2235/386C04B2235/3217C04B2235/5436C04B2235/5445C04B2235/5454C04B2235/6562C04B2235/6567C04B2235/96
Inventor 何浩吴楚陈永志
Owner HUNAN HENGJI POWDER TECH
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