Cemented-Carbide Cutting Tools

Hafnium carbide [12069-85-1] can be used as surface coating on cemented-carbide cutting tools, shows promise as a stable field emission cathode... 

Refractory compound coatings of carbides, nitrides, and oxides on cemented carbide cutting tools, mainly by the CVD process, are estimated at 300 X 10 annually worldwide. 

Table 11. Physical Properties of Ceramic and Cemented-Carbide Cutting Tools ...

Experimental TiB2 coatings for cemented carbide cutting tools and other wear- and erosion-resistant applications (pumps, valves, etc.). ]... 

Narasimhan, K., Boppana, S.P., Bhat, D.G., (1995), Development of a graded TiCN coating for cemented carbide cutting tools-a design approach , Wear, 188(1-2), 123— 129. 

Cemented carbide cutting tools, e.g. inserts for turning, can easily be CVD coated without a post heat treatment, because their properties are only slightly influenced by the high CVD temperature. 

Around 1920, the first ceramic departments became established at universities and other institutes across Germany. These were not only set up for the specialist education of ceramists, they pushed ahead with further research activities. Above all, the vehicle and communications industries ensured a growing demand for products for which special materials had to be developed. Launched onto the market, for example, were ceramic spark plugs made of sintered alumina (1929), cemented carbide cutting tools (WC, 1930), and capacitors (barium-steatite, 1932). 

Enhancement of Coating Adhesion Prior to coating deposition, cemented carbide cutting tool substrates are mechanically treated via various methods for improving the film adhesion. As a side effect of these treatments. 

Sarin, V. K., Cemented Carbide Cutting Tools, in Advances in Powder Technology, (G, Y. Chin, ed.), ASM Materials Science Seminar, ASM, Metals Park, OH (1981)... 

Aravindan S, Ramkumar J, Malhotra SK, Krishnamurthy R. Enhancement of cutting performance of cemented carbide cutting tools by microwave treatment. In Clark DE, Folz DC, Folgar CE, Mahmoud MM, editors. Microwave solutions for ceramic engineers. Ohio The American Ceramic Society 2005. p. 255-62. 

Nitrides are used for wear-resistant applications, most notably surface engineering of cemented carbide cutting tools and tool steels. Titanium nitride (TiN) is the most frequently employed coating, but titanium car-bonitride (TiCN), hafnium carbide (HfC), titanium aluminum nitride (TiAlN), titanium zirconium nitride (TiZrN), and chromium nitride (CrN) have also been used commercially. These coatings are applied by vapor deposition techniques (Fig. 2). 

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