Sintering and Model of Thermal Residual Stress for Getting Cutting Tools from Functionally Gradient Materials

Autor(es)

Carneiro, Marcelo Bertolete ; Machado, Izabel Fernanda ; Settineri, L

• Tipo de documento: Artigo Científico
• Fonte: 11TH CIRP CONFERENCE ON INTELLIGENT COMPUTATION IN MANUFACTURING ENGINEERING; v. 8, p. 6-pg., 2013-01-01.

Resumo

Cutting tools with higher wear resistance are those manufactured by powder metallurgy process, which combines the development of materials and design properties, features of shape-making technology and sintering. The annual global market of cutting tools consumes about US$ 12 billion; therefore, any research to improve tool designs and machining process techniques adds value or reduces costs. The aim is to describe the Spark Plasma Sintering (SPS) of cutting tools in functionally gradient materials, to show this structure design suitability through thermal residual stress model and, lastly, to present two kinds of inserts. For this, three cutting tool materials were used (Al2O3-ZrO2, Al2O3-TiC and WC-Co). The samples were sintered by SPS at 1300 degrees C and 70 MPa. The results showed that mechanical and thermal displacements may be separated during thermal treatment for analysis. Besides, the absence of cracks indicated coherence between experimental results and the residual stresses predicted. (C) 2013 The Authors. Published by Elsevier B.V. (AU)

• Processo FAPESP: 10/00683-2 - Manufatura e avaliação da resistência ao desgaste em usinagem de materiais produzidos por SPS ("Spark Plasma Sintering")
• Beneficiário: Marcelo Bertolete Carneiro
• Modalidade de apoio: Bolsas no Brasil - Doutorado