Machinability Enhancement of Lead-free Brass Alloys

Nobel, Christoph; Klocke, Fritz; Lung, Dieter; Wolf, Sebastián

doi:10.1016/j.procir.2014.03.018

Cited by 80 publications

(60 citation statements)

References 3 publications

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“…However, as the importance of sustainable production is increasingly recognized, interest for decreasing the amount of lead in circulation is growing. Further legislative actions, decreasing the amount of lead in brass, are likely in the future as emphasized by Nobel et al [3] even if none has thus far been published.…”

Section: Introductionmentioning

confidence: 98%

Machinability and manufacturing cost in low-lead brass

Schultheiss

Windmark

Sjöstrand

et al. 2018

Int J Adv Manuf Technol

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Today, commercially used brasses commonly contain 2 to 4 wt% lead. As the availability of low-lead and lead-free brass increases, there are environmental incentives for investigating the consequences of replacing the lead-containing brasses with lead-free equivalents. Generally, lead-free brass is expected to have a lower machinability than its lead-alloyed counterpart, implying a higher manufacturing cost. Thus, the aim of this study has been to quantify the added manufacturing cost by replacing a standard brass alloy with a low-lead alternative. This was done through a case study performed at a Swedish SME which replaced CuZn39Pb3 (3.3 wt% Pb) with low-lead CuZn21Si3P (< 0.09 wt% lead) for a select part. Since CuZn21Si3P is almost twice as expensive as CuZn39Pb3, the material cost was found to have a substantial influence on the manufacturing cost. Additionally, the lower machinability implied a longer cycle time and higher losses while machining CuZn21Si3P, resulting in a 77% overall increase in manufacturing cost when using the low-lead material. Arguably, the difference in material cost, and thus manufacturing cost, may decrease over time making production of low-lead and lead-free brass products a viable option, especially when considering the environmental incentive for decreasing the amount of lead in circulation.

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Section: Introductionmentioning

confidence: 98%

Machinability and manufacturing cost in low-lead brass

Schultheiss

Windmark

Sjöstrand

et al. 2018

Int J Adv Manuf Technol

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“…Figura 49 -Microestrutura típica de latões com silício (NOBEL et al, 2014 (COUTINHO, 1980;TRENT;WRIGHT, 2000;VILARINHO et al, 2005;HOFMANN;MAGD, 2002;ATSUMI et al, 2011;NOBEL et al, 2014). Entretanto, face ao conhecido efeito nocivo do elemento chumbo, diferentes demandas para eliminação deste elemento vêm sendo elaboradas, principalmente no que diz respeito ao mercado de produtos eletrônicos, automotivo e conexões para água potável.…”

Section: Lista De Figurasunclassified

“…Entretanto, face ao conhecido efeito nocivo do elemento chumbo, diferentes demandas para eliminação deste elemento vêm sendo elaboradas, principalmente no que diz respeito ao mercado de produtos eletrônicos, automotivo e conexões para água potável. (ELV, 2000;ROHS, 2002;CA CODE 116876, 2005;REACH, 2006;S.152, 2007;TAHA et al, 2012;NOBEL et al, 2014) Com essa motivação dos efeitos deletérios do chumbo, e pelo fato das pesquisas do ramo até o momento terem enfatizado o estudo da composição química dos latões ou aspectos tecnológicos da usinagem de metais, decidiu-se por observar um diferente ponto de vista, baseado no desenvolvimento de diferentes características microestruturais de latões binários com 40% de zinco, com atenção à contribuição das diferentes morfologias da fase β, obtidas em processos de tratamento térmico industriais, para o processo de usinagem.…”

Section: Lista De Figurasunclassified

“…São largamente utilizados na indústria devido a sua elevada trabalhabilidade, a qual permite a obtenção de geometrias complexas pelos mais variados processos convencionais de fabricação, para a obtenção de produtos semielaborados, como barras, perfis, ou chapas, bem como produtos acabados forjados e usinados. (ASM METALS HANDBOOK, 1990c;TAHA et al, 2012;NOBEL et al, 2014) Uma vez que a solubilidade máxima do zinco no cobre é de 38,5%, as ligas comerciais de cobre e zinco com até 37% de zinco em massa são denominados latões alfa livres de chumbo. Já os latões bifásicos apresentam mais do que 37% de zinco em massa e nestes está presente uma segunda fase, denominada de fase β.…”

Section: Ligas De Latãounclassified

“…( ELV, 2000;ROHS, 2002;CA CODE 116876, 2005;REACH, 2006;S.152, 2007;TAHA et al, 2012;NOBEL et al, 2014). …”

Section: Ligas De Latão De Corte Livreunclassified

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Estudo do efeito da fase &#946 na usinabilidade de ligas de latão livres de chumbo.

Silva¹

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The Influence of the Rake Angle on the Cutting of Low-Lead and Lead-Free Brass Alloys

Müller

Sørby

2023

Lecture Notes in Mechanical Engineering

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Components manufactured from brass alloys are widely used in plumbing systems. Traditionally, lead is added to the alloy to improve the machinability. In recent years, the use of lead has been restricted due to health and environmental concerns. New lead-free and low-lead alloys were developed. These alloys usually show a higher cutting force compared to traditional lead-containing brasses. This paper investigates the influence of different rake angles and tool coating on cutting force and chip formation. The two lead-free brass alloys, CW511L and CW724R, are compared to the low-lead brass CW625N.

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Machinability Enhancement of Lead-free Brass Alloys

Cited by 80 publications

References 3 publications

Machinability and manufacturing cost in low-lead brass

Machinability and manufacturing cost in low-lead brass

Estudo do efeito da fase &#946 na usinabilidade de ligas de latão livres de chumbo.

The Influence of the Rake Angle on the Cutting of Low-Lead and Lead-Free Brass Alloys

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