Abstract
This study investigates the correlation between the residual stress and distortion behavior of a cold-rolled ring from the annealing to quenching-tempering (QT) process. Due to the cold-rolled process, the external periphery of the bearing ring experiences a compressive residual stress. To relieve the residual stress, cold-rolled rings are annealed at 700 °C which is higher than the starting temperature of recrystallization. When cold-rolled rings are annealed at 700 °C for 15 min, the compressive residual stress is reduced to zero and the outer diameter of the annealed ring becomes larger than that of a non-annealed sample, which is unrelated to annealing time. Simultaneously, the roundness and taper deviation do not obviously change compared with those of non-annealed sample. The stress relaxation during the annealing process was attributed to the recovery and recrystallization of ferrite. Annealing has a genetic influence on the following QT heat treatment, wherein the lowest residual stress is in the non-annealed cold-rolled ring. From the annealing to QT process, the deviation of the outer diameter, roundness, and taper increased with annealing time, a large extend than that of non-annealed samples.
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Acknowledgments
The authors would like to appreciate the National Natural Science Foundation of China (Grant No. 51575414), the China Postdoctoral Science Foundation (No. 2017M612524), and the Important Science and Technology Innovation Program of Hubei Province (No. 2015AAA005) for the support of this research.
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Lu, B., Lu, X. Evolution of Residual Stress and Distortion of Cold-Rolled Bearing Ring from Annealing to Quenched-Tempered Heat Treatment. J. of Materi Eng and Perform 27, 368–378 (2018). https://doi.org/10.1007/s11665-017-3119-3
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DOI: https://doi.org/10.1007/s11665-017-3119-3