CN102962537A - Aluminium and stainless steel vacuum brazing technology - Google Patents
Aluminium and stainless steel vacuum brazing technology Download PDFInfo
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- CN102962537A CN102962537A CN 201110270060 CN201110270060A CN102962537A CN 102962537 A CN102962537 A CN 102962537A CN 201110270060 CN201110270060 CN 201110270060 CN 201110270060 A CN201110270060 A CN 201110270060A CN 102962537 A CN102962537 A CN 102962537A
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Abstract
The invention relates to an aluminium and stainless steel vacuum brazing technology. The technology adopts the technical scheme that a joint clearance of an aluminium and stainless steel welding part is between 0.15mm and 0.2mm, a part to be welded is cleaned and then assembled, aluminium-silicon-magnesium brazing filler metal is filled in a joint, the joint is put in a vacuum brazing furnace to be welded, the part is started being heated when the vacuum degree of the vacuum brazing furnace reaches 6 multiplied by 10<-3>Pa, is heated to 450 DEG C after being heated for 60 minutes, is heated to 590 DEG C and 615 DEG C after 30 minutes, is thermally insulated for 5 and 10 minutes, and is cooled to below 40 DEG C along with the furnace after completing the thermal insulation and is discharged, so that then the welding is completed. The aluminium-silicon-magnesium brazing filler metal contains magnesium, the magnesium has the functions in displacing and destroying an aluminium oxidation film to improve the wettability of the brazing filler metal, the interfacial tension between the brazing filler metal and a parent metal is also reduced due to magnesium permeation, accordingly, the wetting capability of the brazing filler metal is increased, soldering flux does not need to be added during the brazing, the brazing technology is simplified, the cost is reduced, and the brazing quality is greatly increased.
Description
Technical field
The present invention relates to the technique of a kind of aluminium and dissimilar metal vacuum brazing, be specially adapted to aluminium and stainless vacuum brazing technique.
Background technology
Different-metal material welding between aluminium and the stainless steel, difficult point and the hot issue of welding field always, the subject matter of aluminium and stainless steel welding be between the two lower, the thermophysical property of solid solubility differ greatly, aluminium is owing to actively form oxide-film on the surface easily and both very easily react the intermetallic compound that generates fragility by force.In order to address these problems, first technological coating is carried out on the welded part surface during soldering, as with electroplating or chemical deposition nickel plating is sharp or ooze nickel, carry out soldering with al-si filler metal more afterwards.But this soldering processes increase technique edge layer operation, cost is high.Publication number be CN1063834A patent disclosure a kind of process of al-si filler metal vacuum brazing foreign material, it has adopted al-si filler metal, the play movement of weldment is 0.1mm～0.3mm, to coat the thick nickel cream of 0.1mm～0.2mm after the weldment cleaning, and put al-si filler metal, place and carry out soldering in the vacuum drying oven.Owing to when soldering, need to smear nickel cream at weldment, and nickel cream is pressed 2: 1～10: 1 weight ratio wiring solution-formings with chemical pure dimethylbenzene and industrial polystyrene, stir and make adhesive, again 300 orders～400 purpose nickel powders and this adhesive are stirred after by weight ratio preparation in 1: 1.5～1: 5 and make process complexity and welding cost when this has just increased the soldering of aluminium silicon.
Summary of the invention
The purpose of this invention is to provide a kind of coating and nickel cream of not needing, technique is simple, and cost is low, the process of the aluminium that brazing quality is good and stainless-steel vacuum soldering.
Technical scheme of the present invention is: the parts of aluminium and stainless steel welding, and the play movement is 0.15～0.2mm, aluminium silicon magnesium solder is filled out in assembling in the joint after weldment cleans, and places in the vacuum brazing furnace, treats that the vacuum of vacuum brazing furnace reaches 6 * 10
-3During Pa, begin to heat, temperature rises to 450 ℃ after heating 60 minutes, rises to 590 ℃～615 ℃ through temperature after 30 minutes again, is incubated to stop insulation after 5～10 minutes with the stove cooling, comes out of the stove to time below 40 ℃, finishes welding.
The invention has the beneficial effects as follows: soldering processes are simple, do not need coating and nickel cream, cost is low, and brazing quality is good, owing to contain magnesium in the aluminium silicon magnesium solder, the wetability that magnesium improves solder to displacement and the destruction of alumite, the infiltration of magnesium also can reduce the interfacial tension between solder and mother metal, thereby has strengthened the wettability of solder, so that be not need to add again brazing flux in soldering, simplified soldering processes, reduced cost, brazing quality has had large increase.
The specific embodiment
Embodiment 1, the parts of aluminium and stainless steel welding, and the play movement is 0.15mm, until weldment assembling after cleaning, fills out aluminium silicon magnesium solder in the joint, places in the vacuum brazing furnace and welds, the vacuum of vacuum brazing furnace reaches 6 * 10
-3During Pa, begin to heat, temperature rises to 450 ℃ after heating 60 minutes, rises to 590 ℃ through temperature after 30 minutes again, is incubated after 5 minutes, finishes to come out of the stove when insulation cools to the furnace below 40 ℃, finishes welding.
The welding of above-mentioned aluminium and stainless steel parts, the play movement is 0.15mm, until weldment assembling after cleaning, fills out aluminium silicon magnesium solder in the joint, places in the vacuum brazing furnace and welds, the vacuum of vacuum brazing furnace reaches 6 * 10
-3The time, beginning to heat, temperature rises to 450 ℃ after heating 60 minutes, and temperature rises to 615 ℃ after through 30 minutes, is incubated after 5 minutes, finishes to come out of the stove when insulation cools to the furnace below 40 ℃, finishes welding.
In the welding of above-mentioned aluminium and stainless steel welding, the play movement of welding assembly can be 0.2mm.
In the welding of above-mentioned aluminium and stainless steel welding, temperature retention time can be 10 minutes.
Claims (2)
1. the technique of an aluminium and stainless-steel vacuum soldering is characterized in that the parts of aluminium and stainless steel welding, and the play movement is 0.15～0.2mm, assembling after weldment cleans, fill out aluminium silicon magnesium solder in the joint, place in the vacuum brazing furnace, the vacuum of vacuum brazing furnace reaches 6 * 10
-3During Pa, begin to heat, temperature rises to 450 ℃ after heating 60 minutes, rises to 590 ℃～615 ℃ through temperature after 30 minutes again, is incubated to stop insulation after 5～10 minutes with the stove cooling, comes out of the stove to time below 40 ℃, finishes welding.
2. the technique of aluminium according to claim 1 and stainless-steel vacuum soldering, it is characterized in that the play movement is 0.15mm, temperature rises to 450 ℃ after heating 60 minutes, temperature rises to 590 ℃ after through 30 minutes, be incubated afterwards 5 minutes, afterwards insulation finishes with the stove cooling, comes out of the stove to time below 40 ℃, finishes welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110270060 CN102962537A (en) | 2011-08-30 | 2011-08-30 | Aluminium and stainless steel vacuum brazing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110270060 CN102962537A (en) | 2011-08-30 | 2011-08-30 | Aluminium and stainless steel vacuum brazing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102962537A true CN102962537A (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110270060 Pending CN102962537A (en) | 2011-08-30 | 2011-08-30 | Aluminium and stainless steel vacuum brazing technology |
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| CN (1) | CN102962537A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639559A (en) * | 2013-11-14 | 2014-03-19 | 北京航空航天大学 | Loop heat pipe evaporator large-area soldering method |
| CN104289783A (en) * | 2013-07-18 | 2015-01-21 | 首都航天机械公司 | Brazing technology applicable to steel-aluminum dissimilar metal and brazing communicating vessel thereof |
| CN106270890A (en) * | 2016-11-03 | 2017-01-04 | 华北水利水电大学 | A kind of aluminum steel method for welding |
-
2011
- 2011-08-30 CN CN 201110270060 patent/CN102962537A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289783A (en) * | 2013-07-18 | 2015-01-21 | 首都航天机械公司 | Brazing technology applicable to steel-aluminum dissimilar metal and brazing communicating vessel thereof |
| CN104289783B (en) * | 2013-07-18 | 2017-04-26 | 首都航天机械公司 | Brazing technology applicable to steel-aluminum dissimilar metal and brazing communicating vessel thereof |
| CN103639559A (en) * | 2013-11-14 | 2014-03-19 | 北京航空航天大学 | Loop heat pipe evaporator large-area soldering method |
| CN106270890A (en) * | 2016-11-03 | 2017-01-04 | 华北水利水电大学 | A kind of aluminum steel method for welding |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |