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热锻模服役环境恶劣,承受剧烈变化的循环热力载荷,极易导致热锻模型腔失效。采用多层金属结构可以显著提高热锻模的寿命与使用效果。以圆柱齿轮坯的锻造工艺为例,利用有限元软件Deform获得了多层金属热锻模在连续热锻条件下的循环温度场和应力分布;建立了多层金属热锻模热机械疲劳寿命预测方法与流程,利用热机械疲劳损伤预测模型对多层金属热锻模寿命进行了预测。结果可为多层金属热锻模的热疲劳寿命提供基础。
Hot forging die serving the harsh environment, withstand dramatic changes in cyclic thermal load, can easily lead to hot forging model cavity failure. The use of multi-layer metal structure can significantly improve the life of hot forging die and the use of results. Taking the forging process of cylindrical gear blank as an example, the cyclic temperature field and stress distribution of multi-layer metal hot forging die under continuous hot forging condition were obtained by the finite element software Deform. The multi-layer metal hot forging die thermal mechanical fatigue life prediction Method and process, the prediction of multi-layer metal hot forging die life is made by using the thermomechanical fatigue damage prediction model. The results provide the basis for the thermal fatigue life of multi-layer metal hot forging dies.