THERMAL AND MECHANICAL SIMULATION INVESTIGATION IN UPSET DEFORMATION OF RAIL BUTT WELDING
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摘要: 采用Gleeble-2000热模拟试验机, 对高速铁路轨道用U71Mn钢轨钢的对焊顶锻变形过程进行了热力模拟试验。研究了不同加热条件下, 钢轨顶锻所需压力的大小;探索了在相同加热条件下, 钢轨钢在顶锻变形过程中的顶锻量、顶锻速度以及带电顶锻时间对接头焊接质量的影响规律。实验结果为合理制定钢轨对焊工艺, 有效控制焊轨质量, 确保列车安全运行提供了试验数据和理论依据。Abstract: The upset formation process of rail (U71Mn) butt welding was test by thermal and mechanical simulation using Gleeble-2000 simulator. The upset pressure of rail is studied with different heat-condition.The influence of upset length, speed and current time on the weld quality is investigated.The results provide scientific foundations for settling welding procedure and improving the weld quality of rail.
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Key words:
- rail /
- butt welding /
- upset deformation /
- thermal and mechanical simulation
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