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通过实验手段与用户旋压工艺分析,研究了Q345B车轮辐旋压成型过程中出现的开裂问题。结果表明:用户火切缺陷、旋压工艺参数设计不当及钢板表面氧化铁皮未去除干净是造成轮辐开裂的主要原因。采取了合理措施,优化了Q345B轮辐用钢板的化学成分,并对冶炼及轧制工艺的精确控制,有效的提高了Q345B车轮辐用钢板的性能指标,满足了客户的需求。
Through the analysis of experimental methods and users’ spinning process, the cracking problem occurred during the spinning process of Q345B wheel was studied. The results show that the main causes of the spoke ripping are that the user has the flaw of cutting defects, the improper design of the spinning process parameters and the non-removal of the oxide scale on the steel surface. The reasonable measures have been taken to optimize the chemical composition of Q345B spoke steel plate and to precisely control the smelting and rolling process so as to effectively improve the performance of Q345B spoke steel plate and meet the needs of customers.