Aluminum, copper, magnesium, steel and its alloys, and nickel, cobalt, precious metals, and magnetic materials, require various refractory materials during casting, processing, and forming. Boron nitride is an ideal refractory material in the field of metallurgy due to its inertness, low wettability of molten metals, resistance to high temperatures over 2000°C, good thermal shock resistance to withstand extreme temperatures without significant deformation. This is why boron nitride has various applications in the field of metallurgy in various forms.
Sintered Boron Nitride Components in Contact with Molten Metal BMATS®.
Boron Nitride parts have high chemical resistance, long service life and reduce maintenance during production. Therefore, they are often used in the following applications:
Break rings in horizontal continuous casting of steel and its alloys:
In the horizontal casting process, the molten metal passes through different stages until it reaches the refractory rings in the solidification zone, at this point, the temperature changes drastically. Therefore, it is crucial to protect the integrity of the split rings or the broken rings, as failure at this point will result in the casting loss. Boron Nitride, together with different additives, has a high resistance to thermal shock and is non-sticky and has a low coefficient of friction.
Boron Nitride Nozzles for Molten Metal Atomizing:
Boron Nitride nozzles are widely used in the processing of metal powder. Molten metal atomization is a process used to fabricate metal powder from a melt. The metal falls into the spray chamber through a “nozzle” . The nozzle is one of the most important parts of the atomization process, a damaged or clogged nozzle can cause the metal flow to stop or the flow to increase dramatically – both of which can disrupt the powdering process. Under high vacuum, boron nitride can withstand high temperatures up to 1800°C. A gas atmosphere can push the temperature further up to 2100 °C. This means boron nitride will remain solid during the melting of most metals. Boron Nitride components are a cost-efficient solution, offering various grades based on the chemical composition of each alloy.
Boron Nitride Material Advantages:
-Non-wetting
-High electrical resistivity
-High thermal conductivity
-Excellent machinability
-Good chemical inertness
-High-temperature material
-High dielectric breakdown strength
-Excellent thermal shock resistance
-Excellent lubricating properties — low coefficient of friction
Packaging of Boron nitride
Given its fragile nature, BN is typically vacuum-sealed in plastic bags, cushioned with thick foam, and packed in cartons to prevent damage during transportation. Special packaging arrangements can be made upon request.
INNOVACERA provides a series of Boron Nitride materials, we provide our customers with a lot of solutions. If you’re looking for a boron nitride components for your application, please get in touch with us to learn more about our full range of products and how we can help you meet your needs.
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