Hexagonal boron nitride (white graphite) plays an increasingly important role in the industrial field due to its unique physical properties. Its application in aluminum extrusion and hot forming processes demonstrates its great potential as a high-performance material.
Superplastic forming technology allows the manufacturing of parts with complex geometries and near-net shapes, which is particularly useful for materials such as aluminum, titanium, and nickel alloys. This process involves heating the material to a specific temperature to exhibit superplasticity, enabling uniform stretching without local thinning or internal defects.
In superplastic forming, the use of a parting layer is crucial. It must provide effective separation and lubrication between the mold and the material while maintaining appropriate adhesion. This balance is essential to ensure that the material can uniformly conform to the mold shape and to prevent the formation of difficult-to-remove residues on the forming tools.
The development of water-based hexagonal boron nitride coatings provides a solution for superplastic forming. These coatings not only provide excellent lubrication while maintaining the necessary adhesion but also have the capability of being applied automatically, making the processing more economical and efficient. Moreover, as the coating does not leave residues on the tools after forming, it helps to reduce downtime, simplify the production process, and lower overall costs.
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