According to Rick Becker, founder of Cluster Sciences, the company recently developed a new technology for surface treatment of cutting tools. Developed as an alternative to diamond-like coatings (DLC) and other tool coatings, the technology actually uses solid-state nanostructured boron radicals to modify the tool surface. This nanomaterial was developed by the company for the semiconductor industry.
This nanostructured form of boron allows more material molecules to be incorporated into the tool matrix rather than mechanically attached to the substrate surface like a coating. Becker explained that once boron is deposited on the substrate, it is impossible to separate it because it has caused a permanent change in the material at the surface interface. For example, the surface of a cemented carbide tool will become a boron-rich cemented carbide. The material composition of the treated tool does not have much to do with this treatment method, which seems to be equally effective for high speed steel substrates and cemented carbide substrates.
According to Becker, the preliminary test results show that under the harsh processing conditions, the metal boron material developed by the company is similar in hardness to diamond-like carbon (DLC) and CBN, and the toughness is much better.
In a test conducted by Cluster Sciences, an uncoated 4-slot square head carbide end mill (6.35 mm diameter) was produced in the same batch, but compared with an end mill surface treated with boron radicals. Cutting test (processed test piece: 4140 hot rolled steel with a length of 610 mm (hardness: 179 HB); spindle speed: 2,880 r/min; feed: 585 mm/min; depth of cut: 2.54 mm; cutting width: full diameter of the tool ). End mills that have not been surface treated are not damaged after 4 passes. Under the same cutting conditions, the treated end mill completed a total of 12 passes before stopping the test.
In addition to its application to cutting tools, this technology is also suitable for surface modification of various wear parts (including bearings, barrels, piston rings, etc.). Boron radicals can be applied to many standard surface treatment processes including ion implantation, DC magnetron sputtering, thermal plasma spray electron beam evaporation, and heat treatment. It is a physical vapor deposition (PVD) process rather than a chemical vapor deposition (CVD) process.
Currently, the company is seeking industrialization partners and is likely to provide relevant technology to manufacturers[/td][/tr]
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