Jiang, Bo

Liu, Guanglei

Liu, Yazheng

Sun, Jianlin

Wang, Zhilin

Zhao, Zhigang

English

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8th International Conference on Physical and Numerical Simulation of Materials Processing (ICPNS)14–17 October 2016Seattle, Washington | Hosted by Purdue UniversitySESSION 5: IRON AND STEEL, HARBOR HALLCo-Chairs: Xixiang Zhang, King Abdullah University of Science and Technology; Jianming Gong, Nanjing Tech UniversitySUNDAY, OCTOBER 16, 2016Void closure and the sensitivity analysis of the process parameters during forging of large steel ingotBo Jiang; Yazheng Liu; Jianlin Sun, University of Science and Technology Beijing; Guanglei Liu; Zhilin Wang, Xining Special Steel Co. Ltd.; Zhigang Zhao, Fushun Special Steel Co. Ltd.ABSTRACTIn this paper, numerical and factory tests were performed for the investigation of void closure and the sensitivity analysis of the process parameters during forging in a 17-tons steel ingot using Deform-3D software. Recent results show that the effective strain and hydrostatic stress are the determining factors for evaluating the void clo-sure. The effects of process parameters during forging on the effective strain and hydrostatic stress distributions were investigated by the orthogonal simulation design. Results show that increasing the deformation degree, the deformation rate in the range from 0.01 to 0.05 s−1, lowering the height–diameter ratio from 1.4 to 2.0 and increas-ing the value of from 0° to 8° are all beneficial to the void closure and deformation uniformity. The deformation degree is remarkable regarding the effective strain in the core. The remarkable factors that affect the hydrostatic stress in the core are as follows according to the response degree from high to low: deformation degree, height–diameter ratio, and deformation temperature. The order regarding the effective strain in the contact surface is as follows: angle of inclination, deformation rate, and deformation degree. The order regarding the hydrostatic stress in the contact surface is as follows: deformation degree, deformation rate, deformation temperature, and height–diameter ratio. The upsetting process were set as follows: the deformation degree 60%; the deformation temper-ature 1200°C; the deformation rate 0.05 s−1; the height–diameter ratio 1.7. After forging, the grade for inspected was 4. The microstructures are uniform.KEYWORDS: void closure, microstructure, effective strain, hydrostatic stress, upsetting

Void closure and the sensitivity analysis of the process parameters during forging of large steel ingot

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1037&amp;context=icpns

Void closure and the sensitivity analysis of the process parameters during forging of large steel ingot

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