A preparation method of a metallic carrier for catalysts
A metal carrier and manufacturing method technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of uncontrollable amount of solder in honeycomb inner core and outer shell, high welding cost, and complicated process.
Active Publication Date: 2009-03-04
亿达天地环保技术股份有限公司
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Problems solved by technology
[0007] The purpose of the present invention is to provide a method for manufacturing a metal carrier that can improve the brazing strength between the honeycomb inner core and the outer shell, so as to solve the problems of high welding cost, complicated process and spot welding of the honeycomb in the prior art. During the process of inserting the core into the shell, the brazing material is easily pushed out, and the amount of solder remaining between the honeycomb inner core and the shell cannot be controlled.
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[0016] See Figure 1~ image 3 First, the strip-shaped nickel-based brazing material 5 is fixed at the position required for seam welding, and the strip-shaped nickel-based brazing material 5 is pressure-welded on the shell 4 along the circumferential direction with the roller 6 of a seam welding machine. on the inner wall. The position, quantity and width of seam welding required for the strip-shaped nickel-based brazing material 5 are determined according to the desired position, quantity and width of the brazing connection. The strip-shaped nickel-based brazing material 5 is generally seam welded on the inner wall of the shell 4 at a distance of 0.5-50 mm from the end. The strip-shaped nickel-based brazing material 5 is generally 0.01-0.1 mm thick and 1.5-30 mm wide. Generally 1 to 5 pieces.
[0017] Then the honeycomb inner core 3 formed by winding is inserted into the shell 4, and finally put into a brazing furnace for brazing.
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Abstract
The invention discloses a manufacture method of the metal carrier for a catalyst. The metal carrier is provided with a plurality of honeycomb-shaped internal cores (3) of air holes (2) extended along the axis line direction and a cylindrical or non-cylindrical shell (4) coated at the circumference of the honeycomb-shaped internal core (3). The invention is characterized in that the internal wall of the cylindrical or non-cylindrical shell (4) is roll welded the nickel-based strip-shaped brazing material (5), the honeycomb-shaped internal core (3) is then sleeved in the shell (4) and is finally brazed by a brazing furnace. By adopting the method, the welding strength between the shell and the internal core is ensured, the process is simplified, and the manufacturing cost is reduced.
Description
technical field [0001] The invention relates to a method for manufacturing a metal carrier used for carrying a catalyst for purifying motor vehicle exhaust. Background technique [0002] The metal carrier is made of different materials for the honeycomb inner core and the outer shell. The honeycomb inner core is made of iron-chromium-aluminum, and the outer shell is made of high-temperature resistant stainless steel; Shell thickness 1 ~ 2mm. In the process of use, due to the high temperature, which can reach more than 900°C, the different thermal expansion coefficients of the two materials and thermal creep, etc., the honeycomb inner core and the outer shell are prone to separation under long-term use, and honeycomb will appear in practice. The phenomenon that the shaped inner core is blown out from the shell, causing the catalytic converter to be scrapped. [0003] How to improve the bonding strength between the honeycomb inner core and the outer shell of the metal carrie...
Claims
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IPC IPC(8): B01J35/04F01N3/28
Inventor 夏哲
Owner 亿达天地环保技术股份有限公司