Subsurface Rolling Contact Fatigue Damage Distribution of Backup Roll After Periodic Dressing
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In this paper, subsurface rolling contact fatigue damage distribution of backup rolls after used one time and periodic dressing are theoretically analyzed. The theoretical model established is verified by experiments test on ring samples and dissection part cut from backup rolls used in production. The results reveal that the subsurface damage of ring samples and dissection parts characterized by hardness test is consistence well with the distribution predicted by theoretical model. The maximum subsurface damage of backup rolls gradually moves toward the surface and the spalling of backup rolls can be prevented if suitable dressing amount be selected.
KeywordsRolling contact fatigue Backup roll Hardness Periodic dressing
This work was sponsored by the Technology Centre of Baoshan Iron & Steel Co., Ltd and subsidized by the Natural Science Foundation of China “Study on reliability modeling and simulation of mechanical structure of aero engine” (Grant No. 51335003). The authors are grateful to the staffs of Rolls Lab of Baoshan Iron & Steel Co., Ltd.
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