摘要
采用"随机法"构建了考虑WC-Co硬质合金的Co相体积分数、晶粒平均粒径分布、晶粒形心分布以及晶粒取向角分布的微观结构模型,结合显微压痕实验的有限元模拟,提出一种基于材料微观结构的硬度预报模型。结果表明:"随机法"构建的微观结构模型较好地反映了材料的真实细观结构特征;材料的硬度受微观结构的影响较大,其中以Co相体积分数和晶粒平均粒径分布最为显著。模拟结果与实验结果吻合较好,从而证明了提出的模型能够准确地预报WC-Co硬质合金的硬度。
A model is proposed by taking the microstructure of the cemented carbides into considera- tion and combining with the finite element simulation of micro-indentation experiments, in order to predict the hardness of WC-Co cemented carbides. The ＂random method＂ is applied to construct the microstructure model, with Co volume fraction, average grain size distribution, grain centroid distri- bution and grain orientation angle distribution being considered. The results show that the actual mi- crostructure characteristics of material can be reconstructed, and the hardness is greatly affected by the microstructural parameters, among which Co volume fraction and the average grain size distribu- tion are the most significant ones. The simulation results agree well with the experimental ones, and the established model is proved to be effective to predict accurately the hardness of WC Co cemented carbides.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2013年第9期22-26,31,共6页
Journal of Materials Engineering
基金
国家重点基础研究发展计划资助项目(2009CB724402)
国家自然科学基金资助项目(51175310)
山东大学优秀研究生科研创新基金资助项目(yyx10012)
山东省优秀中青年科学家科研奖励基金(BS2011ZZ010)
关键词
WC-CO硬质合金
微观结构
硬度
显微压痕实验
有限元仿真
WC-Co cemented carbide
microstructure
hardness
micro-indentation experiment
finite el-ement simulation
