How to Maintain Clearance for Brazed Joints

Posted by Lucas-Milhaupt Brazing Experts on Oct 30, 2017
Brazing, as we've seen, uses the principle of capillary action to distribute the molten filler metal between the surfaces of the base metals. Therefore, during the brazing operation, you should take care to maintain a clearance between the base metals to allow capillary action to work most ...
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Topics: Brazing Fundamentals

Characteristics of Alloying Elements

Posted by Gary DeVries on Jul 18, 2017
Join us as our technical team outlines the main elements used in brazing filler metals, along with the most important features of each element. The more you understand about these elements, the better equipped you are to choose and use the correct products for your brazing operation. These are the ...
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How to Repair a Brazed Joint on Aluminum Heat Exchangers

Posted by Lucas-Milhaupt Brazing Experts on Jun 15, 2017
Braze Joint Repair: Aluminum Heat Exchangers Brazing aluminum heat exchangers is a challenging task. Why? Aluminum melts at a low temperature (~1100-1200°F/593-649°C) and does not change color as it heats, so you have almost no notice before the base material melts away. This means there is a tight ...
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Brazing Surface Preparation: How to Clean Base Materials

Posted by Lucas-Milhaupt Brazing Experts on Jun 1, 2017
Having clean base materials is one of the Six Fundamentals of Brazing that ensure quality braze joints: 1. Good fit and proper clearance 2. Clean base materials 3. Proper flux/atmosphere 4. Proper fixturing 5. Proper heating 6. Final cleaning Why Clean Base Materials? Make sure your base materials ...
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Topics: Brazing Fundamentals

Your Industry-Specific Brazing Solutions

Posted by Lucas-Milhaupt Brazing Experts on Apr 12, 2017
You want brazing solutions designed for your needs – whether you are manufacturing air conditioning systems for automobiles or highly sensitive jet turbine blades or even components for satellites. Find out which brazing alloys and consumables meet your specific needs. Lucas Milhaupt has over 75 ...
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Topics: Aerospace, Automotive, HVAC/R, Electrical, Electronics

Stay Current on Resistance Brazing

Posted by BJ Szyjakowski on Jan 19, 2017
The most common brazing processes include torch, induction, furnace and resistance brazing. Of these methods, resistance brazing is the least common heating method. Why? Compared to the others, it is a fast and relatively inexpensive process, but limitations in assembly geometry have restricted its ...
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Considerations for Carbide Brazing

Posted by Lucas-Milhaupt Brazing Experts on Oct 19, 2016
  Carbide inserts can provide superior wear resistance and prolonged life in cutting and wear processes. These mechanical properties make carbides useful for mining tools, cutting tools, wear parts and other applications. Let's look at the joining process used to attach carbides to their holders. ...
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Topics: Oil & Gas, Carbide

Vacuum Brazing Success

Posted by Lucas-Milhaupt Brazing Experts on Jul 28, 2016
  The most common brazing processes include torch, induction, resistance and furnace brazing. In furnace brazing, filler metal in the form of pre-forms or paste is placed onto an assembly to be joined. This type of brazing includes either a protective atmosphere or the evacuation of the surrounding ...
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Topics: High Purity Vacuum Tube Grade, Furnace

Stop-Off Helps Restrict Braze Alloy Flow

Posted by Lucas-Milhaupt Brazing Experts on Jul 5, 2016
  Because of tolerances, aesthetics or joint design, you sometimes need the flow of braze alloy to be restricted-to stop its flow or keep it off a surface. Capillary dams are often designed into these parts to limit braze alloy flow. A capillary dam is when the clearance is increased to a point ...
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Topics: Flux

Flux Removal: Post-Braze Cleaning

Posted by Lucas-Milhaupt Brazing Experts on May 16, 2016
  Depending on your brazing process, you may need to perform post-braze joint cleaning to remove residual flux. This step can be crucial since most fluxes are corrosive. Post-braze cleaning is one of the Six Fundamentals of Brazing*. Reasons to Remove Flux Let's examine five reasons why post-braze ...
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Topics: Flux, Brazing Fundamentals