成形特征 meaning in Chinese

form feature

During the temperature fields , the results indicate that the processing parameters such as the extrusion velocity , casting temperature , perform preheating temperature , die preheating temperature and so on are important for the temperature fields besides the dwell time . they are must be in concordance each other to the deforming zone is in the quasi - solid state , and the stable semi - solid extrusion is implemented . during the deforming fields , the hyperbolic sine thermo - rigid - viscoplastic fem model is selected according to the forming feature of the process , and the variations of the stress - strain fields are studied
在温度场的模拟中，模拟结果表明，保压时间是影响制件成形质量的关键因素之一，挤压速度、液态金属浇注温度、预制体预热温度和模具预热温度等工艺参数对温度场的影响也很大，需进行参数之间的协调，只有当变形区内部始终维持准固态时，才能实现稳定的液-固挤压成形过程；在变形场的模拟中，根据液态浸渗挤压的成形特征，选用了双曲正弦刚-粘塑性有限元计算模型，研究了变形过程中应力应变场的变化规律，研究了模角对变形和金属流动的影响及变形力的变化过程和其影响因素。