Honeycomb structure alloy material and application thereof

A technology of honeycomb structure and alloy material, applied in the field of catalytic converter, can solve the problems of limiting the contact area between honeycomb alloy material and automobile exhaust gas, limiting the degree of freedom of alloy composition design, etc., so as to achieve the effect of maximizing the contact area and large specific surface area.

Inactive Publication Date: 2017-06-13
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Due to the dense honeycomb mesh, the traditional method of preparing metal-based catalytic converters is mainly prepared by the alloy sheet rolling process. The alloy needs to be rolled into a sheet first, and the alloy is required to have extremely high ductility, which greatly limits the design of the alloy composition. degree of freedom, limiting the contact area between honeycomb alloy material and automobile exhaust

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  • Honeycomb structure alloy material and application thereof
  • Honeycomb structure alloy material and application thereof
  • Honeycomb structure alloy material and application thereof

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preparation example Construction

[0029] In the present invention, the current layer is obtained after the particles are flattened, and the particles are selected from Fe-Cr-Al alloy, Ni-Cr alloy or Fe-Mo-W alloy. In the present invention, the particles are preferably spherical or quasi-spherical; the particle size of the particles is preferably 1-50 microns, more preferably 2-30 microns. The present invention preferably adopts the method of melt atomization granulation to prepare granules. The preparation method of the Fe-Cr-Al alloy preferably includes: mixing and melting iron, chromium and aluminum, atomizing and granulating to obtain the Fe-Cr-Al alloy. The method for preparing the Ni-Cr alloy preferably includes: mixing and melting nickel and chromium, atomizing and granulating to obtain the Ni-Cr alloy. The preparation method of the Fe-Mo-W alloy preferably includes: mixing and melting iron, molybdenum and tungsten, atomizing and granulating to obtain the Fe-Mo-W alloy.

[0030] In the present inventio...

Embodiment 1

[0041] Mix and melt iron, chromium and aluminum with a mass ratio of 60:20:20, atomize and granulate to obtain spherical or nearly spherical Fe-20Cr-20Al alloy particles with an average particle size of 40 microns;

[0042] a), paving the Fe-20Cr-20Al alloy to form the current layer;

[0043]b) Using a laser beam with a power of 375-425W to scan according to the preset current layer cross-sectional profile, the scanning distance is 0.06 mm, and the scanning speed is 1000 mm. The shape of the honeycomb structure in the cross-sectional profile of the honeycomb structure is triangular, Sinter spherical or nearly spherical particles at 1250°C to 1950°C to form a cross-sectional layer. The cross-sectional view of the cross-sectional layer is as follows figure 1 as shown, figure 1 The schematic diagram of the cross-sectional structure of the cross-section layer prepared in Example 1 of the present invention; by figure 1 It can be seen that the honeycomb structure of the cross-sect...

Embodiment 2

[0050] Mix nickel and chromium with a mass ratio of 65:35, atomize and granulate to obtain spherical or nearly spherical Ni-35Cr alloy particles with an average particle size of 30 microns;

[0051] a), the Ni-35Cr alloy is tiled to form the current layer;

[0052] b) Use a laser beam with a power of 375-425W to scan according to the preset cross-sectional profile of the current layer. The scanning distance is 0.05 mm, and the scanning speed is 1200 mm. The shape of the honeycomb structure in the cross-sectional profile of the honeycomb structure is circular , to sinter spherical or nearly spherical particles at 1250°C to 1950°C to form a cross-sectional layer; the cross-sectional view of the cross-sectional layer, such as figure 2 as shown, figure 2 The schematic diagram of the cross-sectional structure of the cross-section layer prepared in Example 2 of the present invention; by figure 2 It can be seen that the honeycomb structure of the cross-sectional layer is circula...

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Abstract

The invention provides a honeycomb structure alloy material and application thereof. The alloy material is prepared through the following additive manufacturing method, and the method comprises the first step of flatly laying particles to obtain a current layer, wherein the particles are selected from Fe-Cr-Al alloy, Ni-Cr alloy or Fe-Mo-W alloy; the second step of using laser beams to scan the current layer according to a preset honeycomb structure section profile of the current layer so that the particles can be sintered and a cross section layer can be obtained; the third step of repeating the first step and the second step on the cross section layer for multiple times till the honeycomb structure alloy material with a preset shape is obtained. The alloy with specific materials is printed into the honeycomb structure alloy material with exact one step according to pore shapes, dimensions and distribution of the preset honeycomb structure and through the combination of a laser selective melting 3D print method. In the laser selective melting 3D print method, the honeycomb geometrical shape, dimension and distribution can be freely designed, a larger specific area is achieved, and the maximization of the contact area of the honeycomb structure alloy material and tail gas can be reached as much as possible.

Description

technical field [0001] The invention relates to the technical field of catalytic converters, in particular to a honeycomb structure alloy material and its application. Background technique [0002] The catalytic converter in the automobile exhaust purifier is a honeycomb filter, which is responsible for the harmful gases (HC, CO, NO) in the exhaust gas X ) into harmless H 2 O.CO 2 , N 2 , the main performance requirements are sufficient specific surface area, strength, oxidation resistance, corrosion resistance, and high temperature resistance. Automobile exhaust purifiers play a vital role in my country's environmental protection and smog control. The annual market value of this product is about 3 billion yuan. [0003] Due to the dense honeycomb mesh, the traditional method of preparing metal-based catalytic converters is mainly prepared by the alloy sheet rolling process. The alloy needs to be rolled into a sheet first, and the alloy is required to have extremely high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B33Y10/00B33Y80/00F01N3/022
CPCF01N3/0222B22F3/1115B33Y10/00B33Y80/00B22F2999/00B22F10/28B22F10/36B22F10/368B22F10/38Y02P10/25
Inventor 邓欣刘金洋吉红伟伍尚华陈健
Owner GUANGDONG UNIV OF TECH
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