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Brasage d'exception depuis plus de 65 ans. Lucas-Milhaupt est un fournisseur reconnu mondialement et le fournisseur n°1 de produits et de services de brasage pour des milliers d'entreprises dans le monde entier.

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Blog

lundi 16 décembre 2013
Washer Calculation

Both rings and washers are preform shapes used for brazing. For smaller parts with relatively small joint volume and lap area, either a washer or ring may be used. Both washers and rings can be circular in shape; however, their cross sections will always differ in shape. A washer has rectangular cross section, whereas a ring has a circular cross section.

mardi 3 décembre 2013
Furnace Atmosphere

When brazing with a furnace, the type of atmosphere plus compatibility with the base materials and filler metals are key to successful joining. Manufacturers that are mass producing large assemblies often rely on controlled atmospheres and vacuum furnaces—to achieve the benefits of reduced oxides, minimal use of flux and cleaner finished pieces. Which atmospheres are best for your applications? Let’s discuss the science and various scenarios of furnace atmosphere.

mercredi 6 novembre 2013
Tips for Designing Braze Joints

What are your primary considerations for designing a braze joint? Perhaps strength, corrosion resistance, or other factors top your list of requirements. How will you design braze joints to meet these objectives? Today’s blog offers Ten Tips from the Lucas-Milhaupt Lab for designing successful braze joints.

lundi 14 octobre 2013
Brazing Brass to Copper with Braze™

Many manufacturers today—especially those in the HVAC/R, plumbing, and heat exchanger industries—are joining a combination of copper and brass components. Tune in to the latest Lucas-Milhaupt® video providing steps for successfully brazing brass to copper with our lowest-melting-temperature, cadmium-free silver brazing alloy – Braze™ 560.

mardi 8 octobre 2013
Fixtures for Brazing & Soldering

Fixture design is one of the most important factors in assuring quality of brazed or soldered joints. In turn, joint design is key to efficient fixturing. Tune in for Lucas-Milhaupt’s tips on improving fixture design—and altering joint design—to increase efficiency and reduce costs. Helpful examples and diagrams are included.

mercredi 21 août 2013
Brazing Copper and Brass

Our subject today is brazing copper-brass systems. HVAC/R, plumbing, and heat exchange components often involve a combination of copper tubing and brass valves, fittings, and parts. When do you need flux, and what brazing scenarios allow self-fluxing? How do you braze copper-brass components to achieve reliable joints that will perform well in the field? This four-minute video will give you step-by-step insights!

mardi 13 août 2013
Selecting a Sil-Fos Alloy

Lucas-Milhaupt’s Sil-Fos® alloys are copper-based filler metals that are self-fluxing on copper because of their phosphorous content. HVAC/R and plumbing suppliers save time by eliminating the additional steps necessary when flux is included in the brazing process. Join us for a discussion on the properties of various Sil-Fos options, and choose the best alloy for your operation.

mardi 23 juillet 2013
Optimal Copper-to-Aluminum Joints

Attention: HVAC/R associates! Our April 2012 blogs on joining copper to aluminum generated much interest from readers, so we will continue the topic. Today, we focus on optimal brazing and soldering conditions, plus consumables, for copper-to-aluminum transition joints. We will discuss use of preformed rings vs. hand-fed alloys, joint design, use of sockets, and test results on the best-performing alloys.

jeudi 11 juillet 2013
Preferred Torch Brazing Flame Types Video

What is the best flame to use for brazing your products? Let’s fire up the torch and analyze three types of flames, through our latest technical video. We’ll show you how these flames work and discuss the best flame for your application.

jeudi 20 juin 2013
Comparison of Brazing Rings & Flat Rods

Many HVAC/R contractors perform prefabrication on their refrigeration units prior to installation. Often, copper tubes and lines are joined by torch brazing and hand feeding braze alloy. This process is time consuming and can result in inconsistencies—both in volume of alloy applied and quality of joints produced. Learn how brazing with preformed rings can save time and money, plus improve quality.

jeudi 6 juin 2013
White Flux vs. Black Flux Video

What is the difference between white-colored flux and black-colored flux? Spend a few minutes watching our newest technical video to find the answer and learn when to use these different brazing materials.

jeudi 30 mai 2013
Oxy-acetylene Torch Safety

The oxy-acetylene torch is a popular heat source in the brazing industry. It offers the advantage of a 5,500°F flame temperature with the versatility of a hand-held system. However, operators must observe safety precautions; while oxygen and acetylene are not volatile gasses, they are explosive when combined under certain conditions.

mardi 21 mai 2013
Brazing Copper to Copper

Lucas-Milhaupt will show how to braze copper tubing and fittings easily, with the help of Sil-Fos® filler metals. Note that no flux is required, because the phosphorus in Sil-Fos provides a self-fluxing ability when used with copper

mardi 7 mai 2013
Hi-temp Flux Blog

Why is a high-temperature flux required when brazing with some alloys? Certain materials, such as tungsten carbides, cast irons, steel, stainless steels, plus nickel-based and heat-resistant alloys, require a brazing approach geared to high temperatures. Together, high-temperature fluxes and braze filler metals produce strong joints that prove robust for mining or construction applications. How do you choose the correct flux and filler metal? Join today’s discussion to learn more!

vendredi 12 avril 2013
Stages of Flux Video

You may be familiar with Lucas-Milhaupt Handy® Flux, which has been an industry standard for over 70 years. We provide brazing flux for every brazing application, including high and low temperature, furnace and induction brazing, plus automated applications. In about three minutes, our newest technical video will make you a “pro” on the Four Functions of Flux and the Four Stages of Flux—understanding of which is vital to your brazing success. Please join us.

mardi 19 mars 2013
Stop-Off Blog

Stop-Off: Controlling the Flow of Alloy In brazing, we focus much importance on cleaning parts to remove oils, dirt, and oxides. This is because braze alloy will not flow over areas not properly cleaned, and the quality of the braze joint will be compromised. BUT, what about situations where you DO NOT want alloy to flow or bond? Because of aesthetics, tolerances, or subsequent assembly steps, you sometimes need the flow of braze alloy to be contained or redirected—to STOP flowing or to stay OFF a surface. Examples include precise designs involving threads or holes. Read on for a discussion about the unique product called Stop-Off.

jeudi 14 mars 2013
Joining Aluminum to Copper Video

Video: Joining aluminum to copper can present some challenges, if you are new to the process. Manufacturers in the HVAC/R industry are using more all-aluminum components, requiring reliable joints to copper parts.

jeudi 7 mars 2013
Interfacial Corrosion

Interfacial Corrosion The situation: When brazing stainless steel with flux, subject to a damp environment, you notice rust-like spots around the periphery of the braze metal. Rapid corrosion may begin within two days or even as soon as two hours. The brazing filler metal may eventually peel away from the stainless steel surface. Ultimately, complete separation of the filler metal from the stainless steel may occur, resulting in complete failure. Why does this happen? How can the problem be avoided? Join us for a discussion on the science behind this issue and the solutions that help avoid interfacial corrosion.

vendredi 15 février 2013
Brazing Copper to Steel with Handy One®

Video: Brazing Copper to Steel For brazing copper to other metals such as steel, flux application is required. Traditionally, you would use a silver brazing alloy rod or preform ring with a paste flux. This two-step brazing process can be time-intensive and costly. It can also introduce inconsistencies which decrease product quality and increase scrap rates. Is there a better way? See our latest video clip!

vendredi 8 février 2013
Capillary Action Video

NEW from Lucas-Milhaupt: a series of short video clips sharing important information on key brazing topics. Welcome to our first video of 2013, featuring capillarity.

mercredi 23 janvier 2013
Precious Metal Scrap

“Hidden Treasure” in Your Scrap If your company makes products that contain precious metals, your operations will generate valuable scrap. Lucas-Milhaupt can help you reclaim the dollars trapped in materials containing silver, gold, platinum or palladium. We offer an environmentally responsible and cost-saving alternative to more conventional refining or waste disposal options. You owe it to yourself to investigate the potential of precious metal reclamation for significant benefit to your bottom line. A day wasted may be money lost!