Chrome Steel
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Selective Solar Surface Solar Based on Black Chromium: Influence of Electrodeposition Parameters in the Absorption of Surfaces
The search for the reduction of costs for the implementation of renewable energies implies in the optimization of the parameters of the manufacturing processes of consolidated technologies. Among these technologies are the solar collectors composed of absorber films characterized by high absorption in the spectrum range corresponding to solar radiation and l
Mat. Res.. Publicado em: 25/02/2019
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2. HVOF-sprayed Coating Over AISI 4140 Steel for Hard Chromium Replacement
The replacement of electrolytic hard chrome (EHC) by high velocity oxy-fuel (HVOF) sprayed coatings is investigated due to the toxicity of EHC process. The wear behavior of AISI 4140 steel coated by HVOF-, EHC-process was compared to quenched and tempered (Q&T) steel using a pin-on-disc apparatus. The wear tests were conducted at room temperature, 10 N appli
Mat. Res.. Publicado em: 28/05/2018
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3. Microstructure and Mechanical Properties of Borided Inconel 625 Superalloy
ABSTRACT The Ni- based superalloy Inconel 625 is extensively used owing to its high strength, excellent fabricability, good weldability and outstanding resistance to high temperature corrosion against aggressive environments. However, despite its unique properties and extensive use, its wear resistance is in some cases unsatisfactory. In this study, Inconel
Matéria (Rio J.). Publicado em: 22/06/2017
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4. Testing electrode suitability for field stimulation of high-threshold biological preparations
IntroductionA problem posed by electrical field (E) stimulation of biological preparations with high excitation threshold is that the E intensity required for excitation is likely to induce water electrolysis at the electrode surface, which can alter the extracellular medium and cause deleterious effects on the cells. In this study, different electrode mater
Res. Biomed. Eng.. Publicado em: 2015-09
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5. Influence of metal alloy and the profile of coronary stents in patients with multivessel coronary disease
BACKGROUND: In Brazil, despite the recommendations of the Brazilian Society of Hemodynamics and Interventional Cardiology, the National Health System has not yet approved the use of drug-eluting stents. In percutaneous coronary interventions performed in the public and part of the private health care system, bare metal stents are used as the only option. The
Clinics. Publicado em: 2011
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6. Comparação entre os processos de tratamentos térmicos convencional e por indução de rolamentos do aço DIN 100Cr6
A têmpera compreende operações de aquecimento e resfriamento controlado, que objetivam melhorias nas propriedades físicas como dureza, resistência à abrasão, tenacidade entre outras. Durante o processo de têmpera, o meio de resfriamento é uma das etapas mais críticas, pois extrai calor da peça com o objetivo de obter as propriedades desejadas. Por
Publicado em: 2010
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7. 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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8. Comparison of rates of in vitro release of nickel and chrome for orthodontic brackets of different trademarks / Comparação das taxas de liberação in vitro de níquel e cromo por bráquetes ortodônticos de diferentes marcas comerciais.
Com o propósito de auxiliar o ortodontista na escolha de braquetes ortodônticos com menor potencial tóxico, seja local ou sistêmico, para seus pacientes, o objetivo deste estudo foi comparar diferentes marcas comerciais de braquetes ortodônticos, a fim de identificar, em ambientes orais simulados durante 28 dias, aquelas marcas que liberam as menores ta
Publicado em: 2007
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9. The transfer of metals for the foods and it possible relationship with the consumer s health / A transferência de metais para os alimentos e sua possível relação com a saúde do consumidor
With the preocupation gone back to the quality of the foods of human consumption, the present research has the purpose of evaluating the transfer of the metals aluminum (Al), chrome (Cr), iron (Fe) and nickel (Ni) during the cooking of the foods rice and bean in containers of aluminum and stainless steel. Initially they were prepared waters patterns, under d
Publicado em: 2005
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10. Estudo da precipitação de carbonetos e da fase sigma no aço inoxidavel tipo AISI 446 sob condições de trabalho em forno de radiação
Tubes of AISI 446 ferritic stainless steels used in a heating furnace of a Petrobrás petrochemical plant, were studied. Samples of brand new and used tubes were investigated using optical microscopy, scanning electron microscopy, energy-dispersive spectrometry, X-ray diffraction, hardness and microhardness measurements and dilatometry. It was found that und
Publicado em: 2002
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11. Influence of the radial spacing between cathodes on the surface composition of iron samples sintered by hollow cathode electric discharge
The present work reports an investigation of the influence of the radial spacing between cathodes on the iron sintering process by hollow cathode electrical discharge, with surface enrichment of the alloying elements Cr and Ni. Pressed cylindrical samples of 9.5 mm diameter and density of 7.0 ± 0.1 g/cm³ were prepared by compaction of Ancorsteel 1000C iron
Materials Research. Publicado em: 2001-10