Abstract

O aumento de produtividade da industria m oveleira exige usinagem a altas velocidades de corte e ferramentas que suportem as elevadas exigencias do processo de corte. A grande maioria das ferramentas utilizadas atualmente, em geral ligas metalicas, nao apresentam as caracteristicas adequadas, dese nvolvendo alto desgaste na cunha de corte. A heterogeneidade da estrutura e a disposicao irregular das fibras associada a caracteristica altamente abrasiva da madeira sao os principais fatores para ocorrencia dos elevados desgastes. Na solucao destes probl emas e frequentemente empregada ferramentas de corte com revestimentos de alta resistencia ao desgaste. Nesse sentido, o uso de filmes de diamante depositados por CVD (Chemical Vapor Deposition) apresentam alto potencial de sucesso, pois combina elevada du reza, baixo coeficiente de atrito, alta condutividade termica e elevada inercia quimica. Porem, este tipo de ferramentas ainda nao e utilizado em escala industrial devido principalmente a baixa adesao entre o filme e o substrato. Este trabalho tem por The increase in productivity of the furniture industry requi res high speed machining and cutting tools to support the high demands of the cutting process. Most of the cutting tools do not have appropriate characteristics and develop high wear on the wedge cut. The heterogeneous structure and irregular arrangement of fibers associated with highly abrasive characteristic of wood are the main factors for the occurrence of high wear. In solving these problems are frequently used cutting tools with coatings of high wear resistance. In this sense, the use of diamond films deposited by CVD (Chemical Vapor Deposition) is a high potential for success, as it combines high hardness, low coefficient of friction, high thermal conductivity and high chemical inertness. However, this type of tools is not yet used on an industrial sc ale mainly due to low adhesion between the film and the substrate. This study aims to evaluate cutting tools produced by deposition of diamond films on ( )

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