TECHNOLOGY #02

Boron Nitride

Boron Nitride (BN) is used as a release agent in aluminum extrusion. BN is known for its high-temperature stability and lubricating properties.

Its adoption is influenced by specific process requirements such as die complexity, extrusion speed, product surface finish quality, and worker health considerations due to potential particle suspension in the plant.

How it works

How it works

Boron Nitride (BN) is a synthetic ceramic material composed of boron and nitrogen atoms.

BN forms a thin, lubricating layer on the surface of the die, reducing friction and preventing sticking or galling of the aluminum as it is extruded.

BN maintains its lubricating properties at high temperatures, typical in the extrusion process, ensuring consistent performance.

Product application:

BN can be applied as a suspension in a solvent or binder, which is then sprayed or brushed onto the die surface.

It can also be applied in powder form or as part of a pre-fabricated coating.

After application, the coating often requires curing, where it is heated to form a stable, adherent layer on the die surface.

References:

Boron Nitride – Solutions for Aluminum Extrusion - Christiane Klöpfer, ESK Ceramics GmbH & Co. KG, A Ceradyne Company, Kempten, Germany (here).

Strengths & Weaknesses

Let´s explore the strengths and weaknesses of using Acetylene Flame lubricants in a common aluminum extrusion process.

Strengths
Weaknesses

Effective Lubrication:

BN provides excellent lubrication, reducing wear on the dies and extending their lifespan.

Application Consistency:

Uniform application of the BN coating is crucial to ensure even coverage and optimal performance.

Thermal Stability:

It remains effective at high temperatures, ensuring consistent lubrication throughout the extrusion process.

Health and Safety:

While BN is generally safe, handling precautions should be taken to avoid inhalation of powders or contact with skin and eyes.

Chemical Inertness:
BN is chemically inert, meaning it does not react with aluminum or other materials, preserving the quality of the extruded product.

Environmental Impact:

BN coatings should comply with environmental regulations regarding the use and disposal of chemical substances.

Minimal Residue:

Leaves minimal residue on the extruded aluminum, maintaining high surface quality.

Difficult Storage:

Preventing moisture absorption can be a challenging task when storing BN.

Strengths & Weaknesses

Let´s explore the strengths and weaknesses of using Boron Nitride lubricants in a common aluminum extrusion process.

Strengths
Effective Lubrication:
BN provides excellent lubrication, reducing wear on the dies and extending their lifespan.
Thermal Stability:
It remains effective at high temperatures, ensuring consistent lubrication throughout the extrusion process.

Chemical Inertness:

BN is chemically inert, meaning it does not react with aluminum or other materials, preserving the quality of the extruded product.

Chemical Inertness:

BN is chemically inert, meaning it does not react with aluminum or other materials, preserving the quality of the extruded product.

Weaknesses

Application Consistency:

Uniform application of the BN coating is crucial to ensure even coverage and optimal performance.

Health and Safety:

While BN is generally safe, handling precautions should be taken to avoid inhalation of powders or contact with skin and eyes.

Environmental Impact:

BN coatings should comply with environmental regulations regarding the use and disposal of chemical substances.

Difficult Storage:

Preventing moisture absorption can be a challenging task when storing BN.

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DISTINGUISH TECHNOLOGIES

1. Acetylene Flames

2. Boron Nitride

3. Graphite Sticks

4. Graphite Suspensions

5. Water-Based Lubricants

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2. How to compare

3. What to compare

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