Tool Wear
Mostrando 1-12 de 120 artigos, teses e dissertações.
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1. Analysis of Al2O3-ZrO2 ceramic insert in turning process of Ti-6Al-4V alloy using grey Taguchi-based response surface methodology (GT-RSM)
Abstract The present investigation aimed at a sustainable green turning operation of Ti-6Al-4V alloy using multi-objective optimization of surface roughness, tool flank wear, material removal rate, and tool wear loss with cutting speed, feed rate, and depth of cut as input parameters. The experiments were performed on a CNC lathe machine using an alumina-zir
Cerâmica. Publicado em: 2022
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2. Productivity and Superficial Quality of an Aspherical Die Using CAD/CAM
ABSTRACT Nowadays, it is hard to imagine modern industry without the manufacturing and design software aided by computer, known as CAD/CAM, once the search for excellence in complex geometry parts, reduced time, quality assurance and interchangeability is increasing. Within this quest, the CAD/CAM platform has become a significant factor in manufacturing, es
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Influência do material da ferramenta de corte sobre a usinabilidade do aço ABNT 4340 no torneamento
RESUMO No presente trabalho procurou-se compreender os fenômenos associados à usinagem do aço ABNT 4340 utilizando ferramentas de corte de metal duro e cermet, ambas com geometria do quebra-cavaco para usinagem leve (LP) e média (MP). Nesse sentido, analisou-se a influência da variação do avanço, quebracavaco e o material da ferramenta de corte nos p
Matéria (Rio J.). Publicado em: 16/09/2019
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4. Nitretação por descargas elétricas da liga Ti-6Al-4V com adição de pó abrasivo SiC ao fluido dielétrico
RESUMO O processo de nitretação que usa Usinagem por Descargas Elétricas é um método que associa a capacidade de usinar superfícies complexas com a obtenção de tratamento termoquímico de nitretação. A fonte de nitrogênio é proveniente da uréia, que compõe o fluido dielétrico juntamente com água deionizada. A liga de titânio Ti-6Al-4V possui
Matéria (Rio J.). Publicado em: 16/09/2019
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5. Influência do material da ferramenta de corte sobre a usinabilidade do aço ABNT 4340 no torneamento
RESUMO No presente trabalho procurou-se compreender os fenômenos associados à usinagem do aço ABNT 4340 utilizando ferramentas de corte de metal duro e cermet, ambas com geometria do quebra-cavaco para usinagem leve (LP) e média (MP). Nesse sentido, analisou-se a influência da variação do avanço, quebracavaco e o material da ferramenta de corte nos p
Matéria (Rio J.). Publicado em: 20/05/2019
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6. Em busca do reconhecimento do distúrbio de voz como doença relacionada ao trabalho: movimento histórico-político
Resumo A elevada prevalência de alteração vocal no exercício do trabalho sinaliza um adoecimento coletivo, determinado pelo desgaste da voz sob precárias condições ocupacionais. Este artigo descreve a construção, no Brasil, do movimento histórico-político em busca do reconhecimento do distúrbio de voz como doença relacionada ao trabalho (DVRT).
Ciênc. saúde coletiva. Publicado em: 2019-03
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7. An Investigation on Surface Roughness and Tool Wear in Turning Operation of Inconel 718
ABSTRACT: This paper investigates the influences of three different input parameters, such as feed rate, insert nose radius, and insert coating methods, in the turning operation of Inconel 718. The coating methods were selected as medium temperature chemical vapor deposition (MT-CVD) and physical vapor deposition (PVD) and in addition to coating methods, the
J. Aerosp. Technol. Manag.. Publicado em: 25/02/2019
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8. Influence of Cryogenic Treatment on the Tribological Behaviour of AISI H21 Tool Steel
The aim of the present work was to find out the optimum cryosoaking duration of deep cryogenic treatment to reduce the wear rate. The AISI H21 hot work tool steel specimens were hardened at 1195 ºC, cryotreated at -185 ºC for 6 to 30 h, double tempered at 540 ºC and soft tempered at 100 ºC. The hardness, impact toughness, wear rate and microstructural ch
Mat. Res.. Publicado em: 29/10/2018
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9. 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
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10. Micro-Scale Abrasive Wear Testing of CrN Duplex PVD Coating on Pre-Nitrided Tool Steel
Specific wear rates were calculated from a series of micro-scale abrasive tests by means of the calotte-grinding method. The tested material was a CrN coating deposited by arc evaporation on ion-nitrided AISI H13 steel. Characterizations included: phase analysis, chemical composition, metallography, microhardness, micro-scratch resistance and nano-indentatio
Mat. Res.. Publicado em: 22/06/2017
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11. Investigation of borided layers contribution on the wear resistance and adhesion of TiN coatings
ABSTRACT The purpose of the investigation was to examine the possibility of improving tool life by reducing the wear effect and improving the adhesion of a thin film through a compound configuration that consists in boriding and PVD deposition. Single layer coatings of TiN were deposited by PVD (cathodic arc) on quenched and tempered and on borided powder me
Matéria (Rio J.). Publicado em: 02/05/2017
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12. Surface Integrity Analysis in Machining of Hardened AISI 4140 Steel
This study aimed to analyze the residual stresses and roughness in finishing milling of AISI 4140 steel, quenched and tempered up to hardness of 58 HRC. Machining operations were performed with the use of CBN inserts and by varying three basic cutting parameters (cutting speed, feed per tooth and cutting depth). Hardened materials are typically machined by a
Mat. Res.. Publicado em: 23/01/2017