CN102861962A

CN102861962A - Method for coating brazing materials on metal carrier

Info

Publication number: CN102861962A
Application number: CN2012103760746A
Authority: CN
Inventors: 夏琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-01-09

Abstract

A method for coating brazing materials on a metal carrier includes utilizing a coating device to coat the brazing materials on wave crest local sections of corrugated sheets, drying the corrugated sheets coated with the nickel-based brazing materials, overlapping the corrugated sheets and flat sheets alternatively in rolling mode to be molded and pressed in a casing and then conducting vacuum high temperature brazing. By means of the method, performance of the metal carrier is improved.

Description

A kind of method that applies brazing material at metallic carrier

Technical field

The present invention relates to the production technology of metallic carrier, be specifically related to a kind of method that applies brazing material at metallic carrier.

Background technology

The metallic carrier that motor-vehicle tail-gas purifying device uses rolls into the alternate superimposed coiled inner core with plain film (also claiming flat plate) of corrugated plate (also claiming the crest sheet) by the ferrum-chromium-aluminum foil, places shell.Between inner core corrugated plate and plain film, between inner core and the shell, arrange brazing material, behind the roll-forming, lead welding and shaping in vacuum brazing furnace.But adopting what brazing material, how to arrange solder, but is the key that improves the metallic carrier performance quality.

Patent of invention 200710080144.2 " a kind of method that applies solder at plain film ", a kind of easy method that applies solder is provided, but owing to adopt Ni-based amorphous foil solder, and the amorphous foil must add boron in manufacture process, otherwise can't moulding, but boron element at high temperature, easily makes ferrum-chromium-aluminum inner core generation embrittlement.

Patent of invention 99802423.6 " way that adds solder to a device " provides a kind of way that applies solder to metallic carrier.First metallic carrier is rolled into type, then a running roller that contains binding agent is broadcasted the metallic carrier end face with binding agent, solder is added in the metallic carrier again.Patent of invention 99802422.8 " way that adds solder to a device " provides a kind of way that applies solder to metallic carrier.First with metallic carrier inner core roll-forming, the metallic carrier inner core of roll-forming is distributed in the sleeve (shell), the end face that will stretch out contacts with binding agent, the metallic carrier inner core is pressed in the sleeve (shell) again, afterwards solder is added metallic carrier.Although these two kinds of technical schemes are simple and feasible, be difficult to reach weld length and the accuracy of designing requirement.

Patent of invention 00100560.X " metal carrier for purifying waste gas and autofrettage thereof and isolated plant ", the preparation method of a kind of waste gas with metallic carrier is provided, it is by a plurality of paste solder feedwaies with nozzle paste solder to be applied on the corrugated plate crest, and opens to keep coating thickness consistent on the paste solder brush by brush or roller.The corrugated plate that then will be coated with solder does not roll into the metallic carrier inner core with flat plate before the drying at its solder and is pressed in the metal shell.Such technology coating thicker (0.08-0.12mm) can only not roll before the drying in coating, in rolling process by corrugated plate and plain film make the coating attenuation in conjunction with pressure, limited this technology and used.

Summary of the invention

The purpose of this invention is to provide a kind of method that applies brazing material at metallic carrier, comprise: use a kind of apparatus for coating, brazing material is coated on the corrugated plate crest local segment, apply the corrugated plate of Ni-based brazing material after drying, alternate superimposed roll-forming with plain film is pressed in the shell, carries out the vacuum high-temperature soldering again.Wherein, described nickel-based brazing material mainly is comprised of binding agent, nickel metal powder, chromium metal powder and silica flour, and brazing temperature is about 1150 ℃, and metallic carrier comprises corrugated plate, plain film, brazing material, shell.

For achieving the above object, the present invention is by the following technical solutions:

A kind of method at metallic carrier coating brazing material may further comprise the steps:

Use coating unit the nickel-based brazing material to be coated on the crest local segment of metallic carrier;

By moulding technique, in metallic carrier crest both sides, only leave a small amount of on the crest nickel-based brazing distribution of material that applies.In order to prevent that the nickel-based brazing material is too thick and too rare (too thick, coating is inhomogeneous; Too rare, coating can flow to trough from crest), control nickel-based brazing viscosity of material is at 4-6mPas.

Described metallic carrier is corrugated plate.

Described nickel-based brazing material mainly is comprised of binding agent, nickel metal powder, chromium metal powder and silica flour.

Description of drawings

Fig. 1 metallic carrier structure;

Fig. 2 applies Ni-based brazing material device schematic diagram;

Apply the brazing material schematic diagram on Fig. 3 corrugated plate crest;

Apply the schematic diagram that Ni-based brazing material was pressed through running roller again on Fig. 4 corrugated plate crest;

Fig. 5 is after vacuum brazing, and nickel-based solder melts rear view;

The schematic diagram that Fig. 6 nickel-based brazing material applies at the local crest of corrugated plate.

Among the figure, 1 is corrugated plate; 2 is plain film; 3 is the nickel-based brazing material; 4 is shell; 5 for applying running roller, and 6 are the moulding running roller; 7 is spreading knife; 8 is transition roller wheel.

The specific embodiment

As shown in Figure 1, metallic carrier is comprised of corrugated plate 1, plain film 2, nickel-based brazing material 3, shell 4.

Fig. 2 is coating unit, the process that applies Ni-based brazing material at the corrugated plate crest is: corrugated plate 1 is placed on the coating unit, nickel-based brazing material 3 is through spreading knife 7, evenly stick on the transition roller wheel 8, contact with the rolling that applies running roller 5 by transition roller wheel 8, nickel-based brazing material 3 is evenly sticked to again apply on the running roller 5, then be coated on the crest of corrugated plate 1, such as Fig. 3.At this moment, even adopt the most accurate, state-of-the-art coating unit, the dried thickness of nickel-based brazing material 3 coatings of coating also between 0.08-1.2mm, such thickness, still too thick for rolling.Because coating of the present invention only is coated on the crest part of corrugated plate 1, can leave like this gap of 0.08-1.2mm between corrugated plate 1 and the plain film 2, solder can flow from the gap after melting, and the place of this weldering is not welded, and burn-on in the place that should not weld.Therefore, the present invention pressed with moulding running roller 6 behind corrugated plate 1 crest coating nickel-based brazing material 3 again, made the nickel-based brazing material 3 on corrugated plate 1 crest mainly be distributed in the crest both sides, and remaining a small amount of on the crest, coating layer thickness≤0.05mm is such as Fig. 4.Scraper 7 is used for the glue amount of control moulding running roller 6, and unnecessary nickel-based brazing material 3 reclaims (not marking among the figure) through scraper 7.Nickel-based brazing material 3 after vacuum brazing is melted can infiltrate in the junction of crest and plain film, such as Fig. 5.

The preferred 4-6mPas of the viscosity of described nickel-based brazing material.

Described nickel-based brazing material preferably is coated in the metallic carrier two ends, and preferred coatings length is that 10-20mm(sees Fig. 6).

Apply the metallic carrier of Ni-based brazing material, after drying, alternate superimposed roll-forming with plain film is pressed in the shell that applies Ni-based brazing material, again through the vacuum high-temperature soldering.

Claims

1. the method in metallic carrier coating cored solder is characterized in that may further comprise the steps: use coating machinery nickel-based brazing cream to be coated on the crest local segment of metallic carrier; By moulding technique, the nickel-based brazing cream that applies is distributed in metallic carrier crest both sides, only leave a small amount of on the crest.

2. method according to claim 1, it is characterized in that: described metallic carrier is corrugated plate.

3. method according to claim 1, it is characterized in that: described nickel-based brazing cream mainly is comprised of binding agent, nickel metal powder, chromium metal powder and silica flour.

4. method according to claim 1 is characterized in that: the preferred 4-6mPas of the viscosity of described nickel-based brazing material.

5. method according to claim 1, it is characterized in that: described nickel-based brazing material preferably is coated in the metallic carrier two ends, and coated length is preferably 10-20mm.

6. method according to claim 1 is characterized in that: after moulding technique, the thickness of coating is less than 0.05mm.

7. method according to claim 1, it is characterized in that: apply the metallic carrier of Ni-based brazing material, after drying, alternate superimposed roll-forming with plain film is pressed in the shell, again through the vacuum high-temperature soldering.