Diamond Wire
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Influência da microestrutura na resistência ao desgaste microabrasivo de ligas de F-Cr-C e Fe-Cr-C-Nb
ABSTRACT Neste trabalho é feita uma avaliação da influência do teor de cromo e da combinação do cromo e nióbio em ligas de revestimento duro do tipo Fe-Cr-C, na microestrutura e propriedades que envolvam a resistência ao desgaste microabrasivo. Vários estudos têm sido realizados em busca de informações conclusivas sobre este sistema em condiçõe
Matéria (Rio J.). Publicado em: 20/05/2019
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2. Water jet tunneling: a theoretical advanced rate evaluation
Abstract Tunnel Boring Machines play an important role in the underground infrastructure execution of modern cities. They weigh thousands of tons and measure hundreds of meters besides utilizing high powered energy in the excavation process. Although being well established, they are based on a last century design approach and they are not compatible anymore
REM, Int. Eng. J.. Publicado em: 2018-04
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3. New concept of tunnel boring machine: high performance using water jet and diamond wire as rock cutting technology
Abstract Tunnel boring machines are important tools in underground infrastructure projects. Although being well established equipment, these machinesare based on designsof more than 60 years ago and are characterized by big dimensions, enormous weight and high power consumption. Commercial aspects should be noted too. The model adopted by the TBM industry re
REM, Int. Eng. J.. Publicado em: 2018-03
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4. Influence of specimens' design and manufacturing process on microtensile bond strength to enamel: laboratory and FEA comparison
This study evaluated the effect of specimens' design and manufacturing process on microtensile bond strength, internal stress distributions (Finite Element Analysis - FEA) and specimens' integrity by means of Scanning Electron Microscopy (SEM) and Laser Scanning Confocal Microscopy (LCM). Excite was applied to flat enamel surface and a resin composite build-
Materials Research. Publicado em: 2010-06
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5. Estudo experimental da oxidação dos aços inoxidáveis ferríticos AISI 444 e AISI 439 a altas temperaturas em ar
It was carried on a comparative study of the response to oxidation, in high temperatures and dry air atmosphere, of the stainless steel AISI 444 and AISI 439, with the temperature range between 850C and 1.050C. Such steels differ in their chemical composition basically by containing molybdenum in the AISI 444 steel. It were used samples supplied by ArcelorMi
Publicado em: 2008
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6. Aspectos relacionados às lavras de granitos ornamentais com fio diamantado no norte do estado do Espírito Santo, Brasil / Aspects related to quarries of ornamental granites with diamond wire in the north of Espirito Santo state, Brazil
The use of the diamond wire in quarries of ornamental granites in Brazil is a relatively recent technique of cut and, for this reason, some problems are decurrent, mainly, of the incorrect use of the equipment, as well as of the lack of experience of operators. The cases here presented report the observations in quarries located in the state of Espirito Sant
Publicado em: 2006
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7. A new route to process diamond wires
We propose an original route to process diamond wires, denominated In Situ Technology, whose fabrication involves mechanical conformation processes, such as rotary forging, copper tubes restacking, and thermal treatments, such as sintering and recrystallisation of a bronze 4 wt.% diamond composite. Tensile tests were performed, reaching an ultimate tensile s
Materials Research. Publicado em: 2003-06
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8. Mechanical behaviour of copper 15% volume niobium microcomposite wires
Cu-Nb microcomposites are attractive in magnet pulsed field technology applications due to their anomalous mechanism of mechanical strength and high electrical conductivity. In this sense, recently it was conceived the use of Cu 15% vol. Nb wires to operate as a high tensile strength cable for a diamond cutting tool (diamond wires) for marble and granite sla
Materials Research. Publicado em: 2001