Leaded Brass Rods C 38500 for Automating Machining Operations: A Technical Report

Pantazopoulos, G.

doi:10.1361/105994902770343926

Cited by 46 publications

(36 citation statements)

References 2 publications

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“…Machinability in these alloys is substantially improved by the presence and uniform distribution of fine size lead particles, since they serve as a chip-breaking constituent, impairing chip ductility and enhancing lubricity at the toolworkpiece interface [1,2]. Moreover, the presence of b-phase lowers the overall ductility of the alloy facilitating the segmentation of machining chips [1,4].…”

Section: Microstructurementioning

confidence: 99%

“…Improved machinability minimizes tool wear and allows for the production of high precision components, exhibiting superior surface finish. Machinability/microstructure relationships, together with some reference of the mechanical properties of leaded brass alloys, have been previously studied and presented in the relevant literature [1][2][3][4]. The evaluation of mechanical properties and the relevant fracture mechanisms of machinable brass rods is a valuable subject for investigation, as the mechanical performance of brass components impacts the reliability and safety of the entire system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fracture Modes and Mechanical Characteristics of Machinable Brass Rods

Pantazopoulos¹,

Toulfatzis²

2012

Metallogr. Microstruct. Anal.

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Machinable brasses are a broad class of high strength copper-zinc alloys mainly containing lead to improve machinability. Conventional leaded brasses are widely used in several manufacturing sectors (i.e., fabrication of hydraulic components, fittings, valves, etc.) due to their superior workability in extrusion and drawing, together with their superior machinability for high efficiency production of final components in high speed/high precision machining centers. In addition to machinability, the mechanical behavior and general fracture mechanisms of these alloys are also important, due to their impact on the overall reliability and safety of brass components. In this study, the main fracture modes and mechanical characteristics of two industrial copper alloys, namely, CuZn39Pb3 and CuZn36Pb2As, are presented in relation to their microstructure. Optical metallography, macro-and microfractography, together with static and dynamic mechanical testing, were used as the principal analytical techniques for the present investigation.

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Section: Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fracture Modes and Mechanical Characteristics of Machinable Brass Rods

Pantazopoulos¹,

Toulfatzis²

2012

Metallogr. Microstruct. Anal.

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“…Its hardness is 130 HB). Studies concerning the microstructure and machinability of CuZn39Pb3 alloy were reported by Pantazopoulos [56] and Toulfatzis et al [57].…”

Section: Test Materialsmentioning

confidence: 99%

Evaluation of Machinability in Turning of Engineering Alloys by Applying Artificial Neural Networks

Vaxevanidis¹,

Kechagias²,

Fountas³

et al. 2014

TOBCTJ

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Abstract:The present paper investigates the influence of main cutting parameters on the machinability during turning process for three typical materials namely AISI D6 tool steel, Ti6Al4V ELI and CuZn39Pb3 brass, all three under dry cutting environment. Spindle speed, feed rate and depth of cut were selected for study whilst arithmetic surface roughness average (R a ) and main cutting force component (F C ) were treated as quality objectives characterizing machinability. For the aforementioned materials a full factorial design of experiments was conducted to exploit main effects and interactions among parameters it terms of quality objectives. The results obtained from dry turning experiments were utilized as a data set to test, train and validate a feed-forward back propagation artificial neural network for machinability prediction regarding all three materials. The work presents the results obtained from the aforementioned experimental effort under an extensive state-of-the-art survey concerning neural network technology and implementation to machining optimization problems.

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“…Leaded brasses are characterized by their great corrosion resistance, electrical conductivity, superior mechanical properties, and formability, but their main industrial use exploits the excellent performance in the machinability, required for high precision and productivity manufacturing processes [1][2][3][4]. The mechanical properties and fracture modes under static tensile and impact conditions were studied in the case of conventional leaded brasses (CuZn39Pb3 and CuZn36Pb2As), highlighting the contributing role of β-phase and Pb to failure evolution [5].…”

Section: Introductionmentioning

confidence: 99%

Final Heat Treatment as a Possible Solution for the Improvement of Machinability of Pb-Free Brass Alloys

Toulfatzis

Pantazopoulos²,

David

et al. 2018

Metals

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Abstract:Heat treatment was performed in order to improve the machinability of three lead-free extruded and drawn brasses, namely CuZn42 (CW510L), CuZn38As (CW511L), and CuZn36 (C27450), based on the concept of microstructural modification. The examined machinability criteria were the following: chip morphology, power consumption, cutting force, and surface roughness. All the above quality characteristics were studied in turning mode in "as received" and "heat treated" conditions for comparison purposes. The selected heat treatment conditions were set for CW510L (775 • C for 60 min), CW511L (850 • C for 120 min), and C27450 (850 • C for 120 min) lead-free brass alloys, according to standard specification and customer requirement criteria. The results are very promising concerning the chip breaking performance, since the heat treatment contributed to the drastic improvement of chip morphology for every studied lead-free brass. Regarding power consumption, heat treatment seems beneficial only for the CW511L brass, where a reduction by 180 W (from 1600 to 1420 W), in relation to the as-received condition, was achieved. Furthermore, heat treatment resulted in a marginal reduction by 10 N and 15 N in cutting forces for CW510L (from 540 to 530 N) and CW511L (from 446 to 431 N), respectively. Finally, surface roughness, expressed in terms of the average roughness value (Ra), seems that it is not affected by heat treatment, as it remains almost at the same order of magnitude. On the contrary, there is a significant improvement of maximum height (Rt) value of CW511L brass by 14.1 µm (from 40.1 to 26.0 µm), after heat treatment process performed at 850 • C for 120 min.

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Leaded Brass Rods C 38500 for Automating Machining Operations: A Technical Report

Cited by 46 publications

References 2 publications

Fracture Modes and Mechanical Characteristics of Machinable Brass Rods

Fracture Modes and Mechanical Characteristics of Machinable Brass Rods

Evaluation of Machinability in Turning of Engineering Alloys by Applying Artificial Neural Networks

Final Heat Treatment as a Possible Solution for the Improvement of Machinability of Pb-Free Brass Alloys

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