Hard Metal
Mostrando 13-24 de 49 artigos, teses e dissertações.
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13. Revestimentos de liga de nÃquel depositados pelo processo TIG com alimentaÃÃo de arame frio: aspectos operacionais e metalÃrgicos / Nickel based alloys weld overlay deposited by gtaw cold wire feed: operational and metallurgical aspects
The weld overlay with nickel-based alloys is an interesting alternative for the construction and repair of equipments for applications in severe corrosive medium, allowing reach the desirable characteristics (corrosion resistance) with a significant reduction of cost. In this context, the GTAW cold wire feed process can be a good option for overlay depositio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2010
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14. Effect of high energy milling on the microstruture and properties of wc-ni composite
Hard metal is a composite material used in several areas of machining, mining and construction. It can be applied directly on oil and gas drilling equipment components. The main objective of this work was to apply a high energy milling technique to produce the WC-Ni composite and study the effects of milling time in the material properties. The milling of ha
Materials Research. Publicado em: 2010-09
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15. Evaluation of the adhesion strength of diamond films brazed on K-10 type hard metal
The coating of cutting tools with diamond films considerably increases the tool performance due to the combination of the unique tribological properties of diamond with the bulk properties of the substrate (toughness). The tool performance, however, is strongly related to the adhesion strength between the film and the substrate. In this work our main goal wa
Publicado em: 2010
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16. Estudo da moagem de alta energia e sinterização de metal duro WC-Ni
O metal duro é um material compósito utilizado em diversas áreas de usinagem, mineração e construção civil, podendo ser aplicado diretamente em componentes de equipamentos de perfuração de petróleo e gás. O presente trabalho teve como objetivo principal a aplicação da técnica de moagem de alta energia visando produzir o compósito WC-Ni e estud
Publicado em: 2010
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17. AVALIAÃÃO DO REVESTIMENTO A BASE DE LIGA DE NÃQUEL EM AÃO ESTRUTURAL, EMPREGANDO O METAL DE ADIÃÃO ERNiCrMo-3 ATRAVÃS DA SOLDAGEM MIG/MAG / EVALUATE OF NICKEL WELD OVERLAY IN STRUCTURAL STEEL, WITH EMPLOYMENT OF GMAW ERNiCrMo-3 ELECTRODE.
The use of nickel alloy cladding components could be more frequently in petroleum industry. The crescent naphthenic corrosion and high molecular weight of national petroleum contribute for needs of materials with more resistance to corrosion, to temperature and to pressure. At this way, how part of systematic study, this work pretends to define operational r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2008
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18. Eletroerosão por fio em metal duro para ferramentas de estampagem de lâminas de motores elétricos
The process of wire electrical discharge machining is currently used in manufacturing most hard metal (tungsten carbide) dies and punches, used in steel stamping tools for electric motors. The home appliance, industrial electric motor, transformer and hermetic compressor industries, use progressive stamping tools, justifying a better understanding of the man
Publicado em: 2008
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19. Análise do efeito do tempo da moagem de alta energia no tamanho de cristalito e microdeformação da rede cristalina do WC-Co
Hard metals are the composite developed in 1923 by Karl Schröter, with wide application because high hardness, wear resistance and toughness. It is compound by a brittle phase WC and a ductile phase Co. Mechanical properties of hardmetals are strongly dependent on the microstructure of the WCCo, and additionally affected by the microstructure of WC powders
Publicado em: 2008
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20. Evaluation of the use of die spacer over the marginal fit of casting copings of Ni-Cr, Ni-Cr-Be and commercially pure Titanium / Avaliação da adaptação marginal de copings metálicos fundidos em ligas de níquel-cromo, níquel-cromo-berílio e em titânio comercialmente puro em função da aplicação de espaçadores
The purpose of the study was to evaluate the effect of using die spacers on the marginal fit of Ni Cr (Verabond II) (VB II) and Ni-Cr-Be (Verabond) (VB) alloys and commercially pure Titanium (Tritan) (Ti-cp) casting copings by the lost wax technique. Using a metal master die, 135 Resin Added Extra Hard Type IV Stone were obtained for the fabrication of wax p
Publicado em: 2008
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21. Transporte atômico e reação química em nanoestruturas TiN e TiN/Ti em aço nitretado a plasma
The use of cutting tools in progressively more severe conditions in the metal-mechanics industry and the requirement to increase tool life against friction, wear and high temperature corrosion made of surface treatments an important protection method. One of the most modern treatments is the so-called duplex, that consists of plasma nitriding and deposition
Publicado em: 2008
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22. Compósito de hidroxiapatita e lignina como promotor de osseointegração entre implante metálico e tecido ósseo: estudo experimental / Hydroxyapatite-lignin composite as a metallic implant-bone tissue osseointegration improver: experimental study
This study aimed to evaluate the composite made of synthetic hydroxyapatite associated with lignin, as a promoter of integration between a metal implant (intra-medullar pin, Schanz) and bone tissue. Twenty New Zealand rabbits were used, each of them had both tibia operated: the left one was treated with the composite and the right was not treated, serving as
Publicado em: 2008
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23. Anodização para obtenção de membranas cerâmicas / Hard anodizing to attachment of ceramic membranes
This a study on the achievement of alumina membranes by the method of anodizing. From this method got up a layer of aluminum oxide on the anodic metal, who presented the basic properties necessary for the application as a support for the production and acquisition of nanomaterials, such as porosity nano and resistance to high temperature, and other propertie
Publicado em: 2007
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24. Influência do tratamento térmico e do tipo de reforço nas propriedades de compósitos a base de ligas de alumínio obtidos via metalurgia do pó.
The development of composite materials is a result of the need to conjugate the properties of two or more components in one, thus maximizing the individual properties. The Aluminium Matrix Composites (AMCs) reinforced with hard particles have bulked the sectors of application due to the properties as low density and increased wear resistance. The technique o
Publicado em: 2007