Machinability
Mostrando 1-12 de 40 artigos, teses e dissertações.
-
1. Avaliação de desvio dimensional em Inconel 718 após a retificação em diferentes técnicas de lubri-refrigeração
RESUMO O Inconel 718 é uma liga à base de níquel que possui elevada resistência à fadiga e à fluência, ductilidade, rigidez, inércia química e capacidade de operar em elevadas temperaturas, por isto é bastante utilizada na fabricação de peças aeronáuticas de alto rendimento. Estas peças exigem tolerâncias dimensionais e geométricas estreitas
Matéria (Rio J.). Publicado em: 25/11/2019
-
2. Tensile and fatigue properties, machinability and machined surface roughness of Al-Si-Cu alloys
ABSTRACT In this paper, the aim was to determine if ASC91 (9 % Al, 1 % Cu) could be replaced with ASC73 (7 % Al, 3 % Cu) aluminium alloy, with presumably improved machinability due to lower silicon content (9 to 7 %) and retained mechanical properties due to a higher copper content (1 to 3 %). The test samples were excised from cylinder heads produced by the
Matéria (Rio J.). Publicado em: 16/09/2019
-
3. Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
Abstract: The aim of this study is to evaluate the machinability of four CAD/CAM materials (n = 13) assessed by brittleness index, Vickers hardness, and fracture toughness and interaction among such mechanical properties. The materials selected in this in vitro study are Feldspathic ceramic [FC], Lithium-disilicate glass ceramic [LD], leucite-reinforced glas
Braz. oral res.. Publicado em: 04/04/2019
-
4. On the Machinability and Surface Finish of Superalloy GH909 Under Dry Cutting Conditions
GH 909 alloy is a kind of low thermal expansion superalloy with high strength and low expansion coefficient. It is mainly used for manufacturing of aero-engine turbine casings, sealing ring, vanes and other gap control parts, to improve the working efficiency and thrust of the engine as well as to reduce gas loss and fuel consumption. However, the machinabil
Mat. Res.. Publicado em: 21/05/2018
-
5. Machinability Evaluation in Hard Milling of AISI D2 Steel
Milling of hardened steel components provides considerable benefits in terms of reduced manufacturing cost and time compared to traditional machining. Temperature variation in milling is an important factor affecting the wear of cutting tools. The poor selection of milling parameters may cause excessive tool wear and increased work surface roughness. Hence,
Mat. Res.. Publicado em: 01/03/2016
-
6. Emprego de ferramentas estatísticas para avaliação da usinabilidade de ligas de alumínio
The main objective of the present work is to study the effect of the input variables: mechanical properties of the workpiece (tensile strength, hardness and elongation) and cutting conditions (cutting speed, feed rate, depth of cut and lubri-cooling system) over the output variables: cutting forces, power consumption, cutting temperature, surface roughness (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2012
-
7. Influência do teor de silício na usinabilidade da liga de alumínio 6351 - avaliada através de força de corte e acabamento superficial / Influence of the silicon content in the machinability of the 6351 aluminium alloy analysed through cutting force and surface finish
The aim of this work is to study the effect of silicon content in the machinability of CBAs (Compania Brasileira de Aluminio) 6351 aluminum alloy measured through cutting force and surface finish. In a first moment the effect of depth of cut (ap), cutting speed (vc), feed rate (f) and silicon content (% Si) on the machinability were investigated. The machini
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/03/2012
-
8. Efeito da modificação com estrôncio na microestrutura e nas propriedades mecânicas da liga 356 / Effect of strontium on the microstructure and mechanical properties alloys 356
The properties of aluminum-silicon alloys are strongly dependent on the casting process used, the chemical additions made to control eutectic structure, primary silicon and grain structure, and molten metal treatment to reduce hydrogen gas content and to remove inclusions. Modification treatments transform the flake eutectic silicon into a fibrous form produ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
-
9. Avaliação de diferentes ferramentas no torneamento da liga Inconel 713C / Evaluation of different tools in turning of Inconel 713C
The super alloy Inconel 713C is an alloy whose main element of its composition is nickel. The combination of high levels of this element and the structure of this material makes it very difficult to be transformed by the machining process. Because of this difficulty and lack of information about the machining of this material, the purpose of this study was t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
-
10. Machinability study of steels in precision orthogonal cutting
The miniaturization of components and systems is advancing steadily in many areas of engineering. Consequently, micro-machining is becoming an important manufacture technology due to the increasing demand for miniaturized products in recent years. Precision machining aims the production of advanced components with high dimensional accuracy and acceptable sur
Materials Research. Publicado em: 03/07/2012
-
11. An analysis of the machinability of ASTM grades 2 and 3 austempered ductile iron
Austempered Ductile Iron (ADI) is a ferrous material that was first fabricated in the second half of last century, therefore a relatively new material compared to steel, which has been used for different applications by mankind for some millennia now. ADI ;s mechanical properties, such as its strength-to-weight ratio, which has proven to outperform that of f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
-
12. PRODUÇÃO DE PRÉ-FORMAS USINÁVEIS DE VITROCERÂMICA FELDSPÁTICA MOLDADAS POR INJEÇÃO A QUENTE / PRODUCTION OF PRE-FORMS OF CERAMIC WORKABLE FELDSPAR-MOLDED HOT
A reabilitação protética do elemento dentário com excelência estética e funcional tem sido alcançada através do amplo uso de cerâmicas avançadas na odontologia. Técnicas de processamento como moldagem por injeção a quente e usinagem por CAD/CAM (computer-aided design/computer aided manufacturing) conferem ao material uma microestrutura com menor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2010