摘要
系统地分析了金属材料组织预测模型的固有缺陷,并提出了合理、可行的解决办法。由于预测模型存在再结晶晶粒尺寸大于初始晶粒尺寸的问题,提出了将再结晶晶粒尺寸小于初始晶粒尺寸作为再结晶发生的附加判据;由于分段函数型晶粒长大模型存在晶粒长大不连续的问题,当晶粒长大过程包含分段点时,采用分段点的长大函数;由于平均晶粒尺寸模型存在平均晶粒尺寸小于再结晶晶粒尺寸的问题,给出了不完全再结晶时平均晶粒尺寸模型的适用条件和构造原则。示例结果表明,这些办法是有效的、合理的。这些工作对保证仿真计算的准确性、合理性很有价值,也能为组织预测模型的设计提供参考。
The inherent defects of microstructure prediction model for metallic material were overall analyzed. And applicable and reasonable solutions were proposed. As the prediction model had the problem that recrystallization grain size （RGS） might be larger than initial grain size （IGS）, the additional criterion for recrystallization that RGS was smaller than IGS was proposed. As the subsection functions type model had the problem that grain growth was discontinuous, the growth function of the subsection point was applied when the discontinuity points was included in prediction range. As mean grain size model had the problem that the mean grain size might be smaller than RGS for the incomplete recrystallization, its applicable conditions and structure principals of the incomplete recrystallization were given. The example results show that the solutions are effective and reasonable. The works are of great value to guarantee the accuracy and rationality in the simulation calculation, which can also provide reference for the design of prediction model.
出处
《热加工工艺》
CSCD
北大核心
2013年第23期107-110,共4页
Hot Working Technology
基金
国家高技术研究发展计划(863计划)项目(2009AA03Z515)
