The material behaviors of two types of bearing steels at hot working conditions are investigated. Stress-strain curves at various temperatures (900–1300°C) and strain rates (1–50/s) are obtained by compression tests with a computer controlled servo-hydraulic Gleeble 3800 testing machine. Elongation and reduction of the area are also obtained by tensile tests with the Gleeble 1500 testing machine. Flow stresses are calculated from the experiments and are used to predict the temperature distribution and the metal flow of a workpiece during a multistage hot forging process of a bearing race. A rigid-thermoviscoplastic finite element method is applied. The experimental and numerical results are summarized to reveal the reasons for internal crack formation.
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e-mail: msjoun@nongae.gsnu.ac.kr
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July 2007
Technical Papers
Hot Deformation Behavior of Bearing Steels
Ho Keun Moon,
Ho Keun Moon
R&D Center,
Shaeffler Korea Corp.
, Changwon, Korea, 641-020
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Jae Seong Lee,
Jae Seong Lee
R&D Center,
Shaeffler Korea Corp.
, Changwon, Korea, 641-020
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Sun Joon Yoo,
Sun Joon Yoo
POSCO Technical R&D Center
, Pohang, Korea, 790-704
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Man Soo Joun,
Man Soo Joun
School of Mechanical and Aerospace Engineering,
e-mail: msjoun@nongae.gsnu.ac.kr
GyeongSang National University
, Jinju, Korea, 660-701
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June Key Lee
June Key Lee
School of Mechanical and Aerospace Engineering,
GyeongSang National University
, Jinju, Korea, 660-701; Department of Mechanical Engineering, The Ohio State University
, Columbus, OH 43210
Search for other works by this author on:
Ho Keun Moon
R&D Center,
Shaeffler Korea Corp.
, Changwon, Korea, 641-020
Jae Seong Lee
R&D Center,
Shaeffler Korea Corp.
, Changwon, Korea, 641-020
Sun Joon Yoo
POSCO Technical R&D Center
, Pohang, Korea, 790-704
Man Soo Joun
School of Mechanical and Aerospace Engineering,
GyeongSang National University
, Jinju, Korea, 660-701e-mail: msjoun@nongae.gsnu.ac.kr
June Key Lee
School of Mechanical and Aerospace Engineering,
GyeongSang National University
, Jinju, Korea, 660-701; Department of Mechanical Engineering, The Ohio State University
, Columbus, OH 43210J. Eng. Mater. Technol. Jul 2007, 129(3): 349-355 (7 pages)
Published Online: April 9, 2007
Article history
Received:
September 24, 2003
Revised:
April 9, 2007
Citation
Moon, H. K., Lee, J. S., Yoo, S. J., Joun, M. S., and Lee, J. K. (April 9, 2007). "Hot Deformation Behavior of Bearing Steels." ASME. J. Eng. Mater. Technol. July 2007; 129(3): 349–355. https://doi.org/10.1115/1.2744392
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