Abstract
Novel material systems for coatings on cutting tools, towards accomplishing clean manufacturing, i.e. without the use of a cutting fluid, are presented. They involve use of multilayer nanocoating architectures of carbide/metal or solid lubricant/metal on cemented carbide tools by physical vapor deposition (PVD) process, namely, magnetron sputtering. By providing numerous (literally hundreds of layers) alternate nanolayers of hard and tough, hard and hard, or solid lubricating and tough materials, it is possible to take advantage of the unique properties of nanostructures, namely, higher hardness, higher strength, higher modulus, higher wear resistance, higher fracture toughness, higher chemical stability, and reduced friction than their counterparts where the coating layer thickness is in the micrometer range. Various features of these coatings are discussed from the point of view of their application in dry machining.
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