Effect of different conveying ways on thermal stress distribution of slab
LIU Qi-long1,2，ZHANG He-xiong3，ZHU Zheng-hai3
（1. National Engineering Research Center of Continuous Casting Technology， Central Iron and Steel Research Institute， Beijing 100081， China 2. No.4 Steelmaking and Rolling General Plant， Ma′anshan Iron and Steel Co.， Ltd.， Ma′anshan 243011， Anhui， China 3. School of Metallurgical Engineering， Anhui University of Technology， Ma′anshan 243002， Anhui， China）
Abstract：As to the process of the slab conveying，the thermal elastoplastic model was established based on the heat transfer model of the slab. The thermal stress distribution of the slab were studied under the condition of different conveying ways. Results showed that the surface and center of the slab were effected by the tensile stress and compressive stress respectively in the process of roller conveying. The maximum tensile stress was 75 MPa at the place where is about 0.23 m from the edge in the width direction of the slab，and the thermal stress decreased with time. In the process of heat-preserved，the central area and the surrounding of stacking slabs were subjected to the compressive stress and tensile stress，respectively. The thermal stress first increased and then decreased in the top and the center of stacking slabs. In the process of stack cooling，the thermal stress distribution and the change tendency in the top and the center of stacking slabs were similar to that in the process of heat-preserved，but the peak value was up to 94 MPa.
刘启龙 ，张鹤雄，朱正海. 不同输送方式对大板坯热应力分布的影响[J]. 中国冶金, 2016, 26(12): 14-19.
LIU Qi-long，ZHANG He-xiong，ZHU Zheng-hai. Effect of different conveying ways on thermal stress distribution of slab. China Metallurgy, 2016, 26(12): 14-19.
2016, Vol. 26 
