Applications Of Boron Nitride Coatings in Mold Release For The Aluminum Industry

In aluminum processing, molten metal tends to stick to molds at high temperatures, leading to product defects and mold damage. Traditional graphite-based release agents offer some effectiveness but often fall short due to issues like contamination, insufficient lubricity, and excessive residue-making them inadequate for modern clean and efficient production requirements.

Boron nitride coatings stand out in mold release applications due to the following properties:

1. Excellent High-Temperature Resistance:
BN remains stable at temperatures above 900°C, making it suitable for the high-heat environments of aluminum and alloy processing.

2. Non-Wettability:
BN-coated surfaces exhibit strong non-wetting behavior toward molten aluminum, effectively preventing metal adhesion and reducing the need for frequent cleaning.

3. Superior Lubricity:
With a layered hexagonal structure similar to graphite, h-BN offers outstanding lubricating performance, significantly improving mold release efficiency.

4. Chemical Inertness and Environmental Safety:
BN does not react with aluminum or its alloys and emits no harmful gases, making it ideal for applications with strict cleanliness or environmental standards.

5. Extended Mold Life:
By minimizing adhesion and abrasion on the mold surface, BN coatings help extend mold life and reduce maintenance costs.

Typical applications include:

Coating for aluminum die-casting molds

Protective layer on graphite crucibles or stirrers used in molten aluminum

Lubricant for aluminum extrusion molds

Anti-stick lining inside aluminum melting furnaces

As demand grows for higher production efficiency and cleaner processing environments, boron nitride coatings are becoming increasingly essential in the aluminum industry. Their environmentally friendly, safe, and easy-to-use nature aligns perfectly with the goals of modern green manufacturing.

Shengyang New Material Co., Ltd. is committed to the production of boron nitride and boron nitride processed products, and can customize various boron nitride insulating ceramic parts according to customer needs. Contact us if necessary.
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