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Method for preparing metal catalytic carrier

A metal catalyst and carrier technology, applied in metal processing equipment, welding equipment, mechanical equipment, etc., can solve the problems of difficult positioning of solder strips, easy blockage of cross-section holes, uneven structure, etc., and achieve good wettability, uniform deformation, curl easy effect

Inactive Publication Date: 2015-04-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the disadvantages of uneven product structure, difficult positioning of brazing material strips, and easy blockage of cross-section holes in the traditional technology.

Method used

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  • Method for preparing metal catalytic carrier

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Embodiment 1

[0028] Please see attached figure 1 , a method for preparing a metal catalytic carrier, the carrier is formed by stacking and curling a flat foil and a corrugated foil, and is characterized in that: the flat foil and the corrugated foil of the metal carrier are evenly coated with a thin layer by a spraying process The powdered brazing material; then superimposed corrugated foil strips are crimped and formed, put into the shell and sent to the brazing furnace for brazing; finally the metal catalytic carrier is obtained.

[0029] The specific steps are:

[0030] 1. Take a FeCrAl alloy flat foil strip and a corrugated foil strip with a thickness of 0.15mm and a width of 40mm, put them into an aqueous solution of potassium hydroxide with a mass fraction of 10% for alkaline washing, and take them out after ten minutes. After rinsing with water and cleaning and drying with alcohol, a fresh alloy surface is obtained;

[0031] 2. Blend BNi2 solder powder with polystyrene organic bin...

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Abstract

The invention relates to a method for preparing a metal catalytic carrier. The carrier is formed by overlapping and curling a planar foil strip and a corrugated foil strip. The method is characterized by comprising the following steps of: uniformly coating a thin layer of powdery brazing filler metal on the surface of the planar foil strip of the metal carrier by adopting a spray coating process; overlapping and curling the planar foil strip and the corrugated foil strip, and sleeving a housing outside a molded product; and feeding the molded product into a brazing furnace, and brazing the molded product to obtain the metal catalytic carrier. The method has the advantages that the brazing filler metal is uniformly coated on the two surfaces of the planar foil strip by using spray coating equipment, so that the conventional brazing method for overlapping a brazing sheet is replaced, the production cost is lowered, the strips are easily curled, brazing points are uniformly distributed, and the yield is high.

Description

【Technical field】 [0001] The invention relates to the technical field of metal catalytic carriers, in particular to a method for preparing metal catalytic carriers. 【Background technique】 [0002] In recent years, due to its unique advantages, the metal honeycomb structure has attracted more and more attention in the field of catalytic carriers for automobile exhaust purification. The carrier consists of a honeycomb core structure and an outer shell covering the core. The honeycomb part is rolled from a flat plate and corrugated sheets superimposed on the flat plate to form a large number of channels arranged substantially parallel to each other. Brazing is used between the flat plate and the corrugated plate to achieve a firm connection. Judging from several major production processes of metal honeycomb carriers at home and abroad, no matter what process is used, the brazing of flat foil and corrugated foil is always the most important part, which is directly related to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28B23K1/008B23K1/20
Inventor 刘京雷徐宏李莎莎
Owner EAST CHINA UNIV OF SCI & TECH
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