3. Unit 2: Speeds, Feeds, and Tapping - cutting speed chart milling

 2024-07-08 16:34:49

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Guimarães, Monica, Victor Saciotto, Qianxi He, Jose M. DePaiva, Anselmo Diniz, and Stephen Veldhuis. 2024. "Optimizing Machining Efficiency in High-Speed Milling of Super Duplex Stainless Steel with SiAlON Ceramic Inserts" Machines 12, no. 5: 349. https://doi.org/10.3390/machines12050349

Guimarães, M.; Saciotto, V.; He, Q.; DePaiva, J.M.; Diniz, A.; Veldhuis, S. Optimizing Machining Efficiency in High-Speed Milling of Super Duplex Stainless Steel with SiAlON Ceramic Inserts. Machines 2024, 12, 349. https://doi.org/10.3390/machines12050349

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Abstract: Super duplex stainless steels (SDSSs) are widely utilized across industries owing to their remarkable mechanical properties and corrosion resistance. However, machining SDSS presents considerable challenges, particularly at high speeds. This study investigates the machinability of SDSS grade SAF 2507 (UNS S32750) under high-speed milling conditions using SiAlON insert tools. Comprehensive analysis of key machinability indicators, including chip compression ratio, chip analysis, shear angle, tool wear, and friction conditions, reveals that lower cutting speeds optimize machining performance, reducing cutting forces and improving chip formation. Finite element analysis (FEA) corroborates the efficacy of lower speeds and moderate feed rates. Furthermore, insights into friction dynamics at the tool–chip interface are offered, alongside strategies for enhancing SDSS machining. This study revealed the critical impact of cutting speed on cutting forces, with a significant reduction in forces at cutting speeds of 950 and 1350 m/min, but a substantial increase at 1750 m/min, particularly when tool wear is severe. Furthermore, the combination of 950 and 1350 m/min cutting speeds with a 0.2 mm/tooth feed rate led to smoother chip surfaces and decreased friction coefficients, thus enhancing machining efficiency. The presence of stick–slip phenomena at 1750 m/min indicated thermoplastic instability. Optimizing machining parameters for super duplex stainless steel necessitates balancing material removal rate and surface integrity, as the latter plays an important role in ensuring long-term performance and reliability in critical applications. Keywords: super duplex stainless steel; friction; high-speed milling; SiAlON

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Guimarães M, Saciotto V, He Q, DePaiva JM, Diniz A, Veldhuis S. Optimizing Machining Efficiency in High-Speed Milling of Super Duplex Stainless Steel with SiAlON Ceramic Inserts. Machines. 2024; 12(5):349. https://doi.org/10.3390/machines12050349

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