Investigation of tool wear in the turning of Inconel 718 superalloy in terms of process performance and productivity enhancement

Grzesik, Wit; Niesłony, P.; Habrat, Witold; Sieniawski, Jan; Laskowski, Piotr

doi:10.1016/j.triboint.2017.10.005

Cited by 153 publications

(62 citation statements)

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“…CBN is the second hardest material after diamond and, compared to ceramics, it has better hardness and resistance to fracture, but poorer chemical resistance [13]. These tools are suitable for a higher cutting speed than that which is reached with coated carbide tools; however, the increased cost and lower tenacity when compared to carbides are the main drawbacks of PCBN [28,29].Carbide tools coated with PVD (Physical Vapor Deposition)-TiAlN, AlTiN, or AlCrTiN seem to be competitive with ceramic and CBN tools for the machining of the most widely used nickel-based superalloys (Inconel 718 and Waspaloy) due to their lower costs [1,30]. TiAlN coating reduces the cutting forces and improves the flank wear resistance in comparison with tools coated with TiN [31].…”

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confidence: 99%

Finishing Turning of Ni Superalloy Haynes 282

Díaz-Álvarez

Miguélez

et al. 2018

Metals

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Nickel-based superalloys are widely used in the aeronautical industry, especially in components requiring excellent corrosion resistance, enhanced thermal fatigue properties, and thermal stability. Haynes 282 is a nickel-based superalloy that was developed to improve the low weldability, formability, and creep strength of other γ’-strengthened Ni superalloys. Despite the industrial interest in Haynes 282, there is a lack of research that is focused on this alloy. Moreover, it is difficult to find studies dealing with the machinability of Haynes 282. Although Haynes 282 is considered an alloy with improved formability when compared with other nickel alloys, its machining performance should be analyzed. High pressure and temperature localized in the cutting zone, the abrasion generated by the hard carbides included in the material, and the tendency toward adhesion during machining are phenomena that generate extreme thermomechanical loading on the tool during the cutting process. Excessive wear results in reduced tool life, leading to frequent tool change, low productivity, and a high consumption of energy; consequentially, there are increased costs. With regard to tool materials, cemented carbide tools are widely used in different applications, and carbide is a recommended cutting material for turning Haynes 282, for both finishing and roughing operations. This work focuses on the finishing turning of Haynes 282 using coated carbide tools with conventional coolant. Machining forces, surface roughness, tool wear, and tool life were quantified for different cutting speeds and feeds.

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Finishing Turning of Ni Superalloy Haynes 282

Díaz-Álvarez

Miguélez

et al. 2018

Metals

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“…[ Grzesik et al, 2018]. Thakur e Gangopadhyay, 2016a, descrevem que as superligas resistentes ao calor (HRSA -Heat Resistant Super Alloys) começaram a ser desenvolvidas a partir da década de 1950, impulsionadas pelo surgimento de máquinas, equipamentos e dispositivos de alta eficiência.…”

Section: Superligas Resistentes Ao Calorunclassified

“…A análise de cada uma das componentes ortogonais da força de usinagem F (passiva F p , corte F c e avanço F f ) geradas para as condições a seco e com argônio é apresentada separadamente nas subseções que se seguem. Isto corrobora com os estudos de Delijaicov, 2004, e Grzesik et al, 2018. Essas vibrações ocorrem devido ao encruamento do material, aliado ao desgaste de ponta da ferramenta de corte (VB C ) e às altas velocidades de cortes.…”

Section: Análise Dos Desgastes Da Ferramentaunclassified

Influência Do Gás Argônio Na Vida Da Ferramenta De Metal-Duro Durante O Torneamento Da Superliga Vrc625

Filho¹,

Souza²

2019

10º Congresso Brasileiro De Engenharia De Fabricação

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AGRADECIMENTOSAgradeço a meus pais e amigos pelo incentivo e carinho ao longo desses anos para conclusão dessa importante etapa. Ao professor orientador Dr. André João de Souza, pelo auxílio, pela motivação e, principalmente, pelo conhecimento compartilhado durante a pesquisa, a experimentação e o desenvolvimento da dissertação. À UFRGS (Universidade Federal do Rio Grande do Sul) e ao PROMEC (Programa de Pós-Graduação em Engenharia Mecânica). À empresa Novalloy -Aços e Ligas Especiais, que disponibilizou o material utilizado. À empresa Metalúrgica Venâncio LTDA., pela infraestrutura disponibilizada para a preparação do corpo de prova e análise química da amostra. À empresa Continental Ferramentas, pela doação dos insertos utilizados. Ao técnico do LAUS (Laboratório de Automação em Usinagem), Guilherme Vargas Schirmer, pela disponibilidade, auxílio e orientação na execução dos experimentos. Aos colegas de curso, Everton Cristiano Feix, M. Sc. Rafael Farias Garcia, M. Sc. Elias Samuel Cristo Espíndola e M. Sc. Andressa Caroline da Silva Carvalho e aos amigos Henrique Baier, Luiz Carlos de Moura, e Eduarda Jacobi que sempre estiveram dispostos a ajudar e auxiliar no desenvolvimento desse trabalho. Aos professores, mestres, e a todos que direta ou indiretamente fizeram parte da minha formação, о meu muito obrigado. v RESUMO Superligas à base de níquel possuem elevada resistência mecânica, aliada a uma baixa condutividade térmica. São recomendadas para aplicações em ambientes corrosivos e altas temperaturas como em componentes mecânicos para indústria aeroespacial, química e petrolífera. Entretanto, apresentam baixa usinabilidade. Por isso, a elevada taxa do desgaste da ferramenta de corte e a busca por novas técnicas lubrirrefrigerantes ambientalmente corretas, que minimizem os efeitos das altas temperaturas nas interfaces cavaco-ferramenta e ferramenta-peça, são um dos principais desafios dos pesquisadores durante a usinagem desses materiais. Nesse contexto, realizaram-se ensaios de vida da ferramenta de metal-duro classe S com revestimento PVD utilizando gás argônio durante o torneamento da superliga VRC625 em comparação ao corte a seco. Em ambos os casos (a seco e com gás argônio) foram analisadas as falhas (desgastes e avarias) das ferramentas, as magnitudes das componentes ortogonais da força de usinagem (passiva, corte e avanço), as rugosidades das superfícies usinadas (perfis e parâmetros) e as geometrias dos cavacos gerados. Os resultados apresentaram aspectos favoráveis à utilização do gás argônio, pois promoveu um aumento de 10% na vida útil da ferramenta e redução de 47% no desgaste de entalhe. A utilização do gás argônio proporcionou pequena redução na rugosidade das superfícies usinadas (cerca de 5%) e alteração na geometria do cavaco durante a vida da ferramenta. Porém, não foram observadas mudanças significativas nas amplitudes das forças de usinagem e nas geometrias dos cavacos formados. Palavras-chave: Torneamento da superliga VRC625; Gás argônio; Vida da ferramenta; Força de usinagem; Rugosidade da ...

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“…The main problem occurs in the correlation of technological parameters on various quality indicators. The improvement of the effects of LAT is related to the area of technological and geometric variable parameters occurring in the cutting process [4][5], laser heating [6][7][8][9] and geometric variables defining the relationship between the place of beam incidence and material decohesion [3,6,9]. Better machinability indicator can be achieved by using two kinematic variations of the laser-assisted machining process: by thermal softening of the heated cutting layer and by changing the microstructure of the surface layer of the workpiece [3].…”

Section: Introductionmentioning

confidence: 99%

“…They are characterized by high resistance to corrosion as well as heat resistance. Heat resistance is resistance to gases causing oxidation at a temperature higher than 600 ºC, and heat resistance it is defined as the ability to withstand loads not only at ambient temperature but also at high temperature, which results in resistance to deformation at temperatures above 600 ºC [5,[10][11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure characterisation of Inconel 718 after laser assisted turning

et al. 2018

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Abstract. The paper presents the discussion about the possibility of optimising heating and cutting parameters for turning under laser assisted machining (LAM) conditions. The samples of Inconel 718 after annealing and ageing were used. The laser heating experiments were carried out on the stand equipped with the CO2 molecular laser. Characterisation of samples was performed by an optical microscope, hardness measurements, scanning electron microscopy (SEM) to ensure the exact depth of heat affect zone range and to optimised further cutting parameters. Different absorbing layers for laser beam impact improvement were tested. Turning trials were performed with constant cutting speed vc = 28 m/min and feed f = 0,2 mm/rev. The influence of depth of cut ap on microstructure and its properties were investigated. It was proven that for sequential LAM dendritic structure appears in the laser affected zone of the Ni-based alloy. Such microstructures cause better machinability of Inconel 718 due to surface softening.

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Investigation of tool wear in the turning of Inconel 718 superalloy in terms of process performance and productivity enhancement

Cited by 153 publications

References 16 publications

Finishing Turning of Ni Superalloy Haynes 282

Finishing Turning of Ni Superalloy Haynes 282

Influência Do Gás Argônio Na Vida Da Ferramenta De Metal-Duro Durante O Torneamento Da Superliga Vrc625

Microstructure characterisation of Inconel 718 after laser assisted turning

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