Controlling Research of the Pre-Bending Deformation before Straightening and Residual Stresses after Straightening for 100-Meter

Abstract:

Of hot rolling 100-meter heavy rail, the shrinkage masses or swell increments are different in different positions of transverse sections during the cooling process by the reason of profiled cross-section, which resulted in alternating bend, and the flatness and residual stresses are directly affected by bending deformation before straightening during the cooling process. In this paper, By studying the heat boundary conditions in cooling process, the regularity of bending deformation of hot rolling heavy rail during cooling is observed, adopting 3-D transient nonlinear FEM simulation. By controlling the deformation value of bending before straightening and the value after straightening, the influence of residual stresses after straightening from pre-bending values before straightening is analyzed, drawing a conclusion of the regularity that residual stresses are affected by different chord heights at the same straightening rule, and the calculated results have a good accordance with the real values in field scene.

• Periodical: Advanced Materials Research (Volume 572)
• Pages: 296-301
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.572.296
• Online since: October 2012
• Authors: Jian Guo Wang, Lin Chen, Tong Qing Li, Ge Li, Hai Yan Cui, Zhong Liang Tian
• Keywords: 100-Meter Heavy Rail, Bending Deformation before Straightening, Residual Stress, Straightening Deformation

References

[1] J.G. Lenard: Journal of Materials Processing Technology, Vol. 25 (1991), p.303.

[2] S.D. Hu: Journal of Wuhan University of Science and Technology, Vol. 26 (2003), p.224.

[3] J. Basu: Journal of Strain Analysis for Engineer Design, Vol. 39(2004), p.15.

[4] L. Chen: Journal of Iron Steel, Vol. 41(2006), p.457.