Ambrell Induction Heating
Ambrell Induction Heating
induction atmospheric brazing

How Induction Atmospheric Brazing Works

Induction brazing is sometimes done in controlled atmospheres under normal or close-to-normal atmospheric pressure, which is otherwise known as atmospheric brazing. In this type of environment, a significant level of control over the process can be realized and open-air issues such as scaling, oxidation, and carbon buildup can be virtually eliminated.

A controlled atmosphere can be produced in a vacuum furnace, a sealed box or with an atmospheric bell jar. Inert atmospheres of nitrogen, argon, and hydrogen are common choices for controlled atmospheric brazing. Ambrell and its Applications Laboratory, which offers free application testing, have worked with numerous companies on atmospheric brazing applications. Check out some application notes below. 

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Popular Atmospheric-Brazing Application Notes

Click below to read our technical articles written by expert applications engineers that describe how induction heating can improve the efficiency, effectiveness and safety of your atmospheric-brazing process.

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Braze a thin walled tube to a steel cap in a hydrogen atmosphere

A single turn helical coil is used to heat the quartz tube and the tube assembly. The tube assembly is held in place inside the quartz tube by a copper fixture and hydrogen is fed into the quartz tube...

Annealing stainless steel caps for a dental application

Our client had a requirement to anneal large quantities of work-hardened stainless steel crowns. Induction was suggested for its precise, controllable heating. Since oxidation is unacceptable in the finished dental product, induction heating is the appropriate choice for heating in an inert atmosphere.

Crucible Melting a variety of materials in a nitrogen atmosphere

The crucible is heated using an induction coil with a four turn pancake at the base that extends upward into a three turn helical coil.

Annealing steel tubes in an inert atmosphere

Induction annealing heats steel tubes to 2000 ºF (1093 ºC) in an inert atmosphere for very small areas within precise production tolerances. A two-turn concentrator coil is used to heat the stainless steel tube. The annealing process takes place in an inert atmosphere to prevent oxidation.

Brazing Hydraulic Hose Assemblies

To heat a steel hydraulic hose fitting in an inert atmosphere to 2200°F within 7 seconds for brazing without any carbon buildup.

Brazing Copper Tube Assemblies

To heat a copper tube assembly in an inert atmosphere to 1450°F within 45 seconds for brazing without flux or acid wash clean-up.

Braze Copper Tube to Brass Fitting

To use induction heating to braze a copper tube to a brass fitting using a preform braze wire.

Important Induction Heating Literature


About Induction Heating

Induction heating is a fast, efficient, precise and repeatable non-contact method for heating metals or other electrically-conductive materials. The material may be a metal such as brass, aluminum, copper or steel or it can be a semiconductor such as silicon carbide,carbon or graphite. To heat non-conductive materials such as plastics or glass, induction is used to heat an electrically-conductive susceptor, typically graphite, which then transfers the heat to the non-conducting material.

Read our 4-page brochure; learn more about how the science of induction technology can solve your precision heating problems.



Induction Heating Work Coils

The work coil is the component in the induction heating system that defines how effective and how efficiently your work piece is heated.

Read our informative brochure explaining the fundamentals of induction coils and their design.