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<p>The surface quality of machined parts is very important because it affect their performance, life and reliability, specially in high strength stainless steels. In this study, we study the behavior of surface layer of hardened SS2387 stainless steel during dry turning. Main focus is on how machining parameters changes the microstructure. The results shows that cutting speed has major effect on microstructure. At medium cutting speed (100–135&#xa0;m/min), the structure becomes more refined and average size of coherent scattering regions (ASCSR) goes below 8&#xa0;nm. But when speed is increased (180–250&#xa0;m/min), ASCSR increase by around 20%, which means structure becomes coarse. Also, the crystal lattice deformation increase upto 90% when speed is between 170 and 230&#xa0;m/min. A strong relation is found between ASCSR, dislocation density and residual stresses, which together control the surface quality. The study also finds some good cutting conditions where compressive residual stress below − 100&#xa0;MPa is obtained, which is good for improving fatigue life. Plastic side flow (PSF) and surface defects are also connected with machining conditions, so proper control of parameters is very important. These results help in improving dry turning process to get better surface finish and better performance of components.</p>

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A Comprehensive Assessment of the Surface Quality of Hardened SS2387 Stainless Steel Following Dry Turning Processes

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Rahul Thakur,
  • Neelesh Kumar Sahu,
  • Manoj Kumar Gangwar

摘要

The surface quality of machined parts is very important because it affect their performance, life and reliability, specially in high strength stainless steels. In this study, we study the behavior of surface layer of hardened SS2387 stainless steel during dry turning. Main focus is on how machining parameters changes the microstructure. The results shows that cutting speed has major effect on microstructure. At medium cutting speed (100–135 m/min), the structure becomes more refined and average size of coherent scattering regions (ASCSR) goes below 8 nm. But when speed is increased (180–250 m/min), ASCSR increase by around 20%, which means structure becomes coarse. Also, the crystal lattice deformation increase upto 90% when speed is between 170 and 230 m/min. A strong relation is found between ASCSR, dislocation density and residual stresses, which together control the surface quality. The study also finds some good cutting conditions where compressive residual stress below − 100 MPa is obtained, which is good for improving fatigue life. Plastic side flow (PSF) and surface defects are also connected with machining conditions, so proper control of parameters is very important. These results help in improving dry turning process to get better surface finish and better performance of components.