新型梯度硬质合金的组成分布函数与弹性系数模型  

New multi-stage models of component distribution and elastic coefficient of gradient cemented carbide

作　　者：饶秋华[1] 张丽娟[1] 贺跃辉[2] 

机构地区：[1]中南大学土木建筑学院力学系,长沙410075 [2]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国有色金属学报》2007年第5期763-769,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金专项资助项目(50323008)

摘　　要：在分析现有梯度硬度合金的组成分布函数和弹性系数模型的基础上,结合梯度硬质合金制备工艺,提出了以质量分数为基本参数的新型梯度硬质合金组分分布和弹性系数(包括弹性模量和泊松比)的分段函数模型,并通过YG类硬质合金的实验加以验证。结果表明,新型分段函数模型预测的YG类硬质合金弹性系数值与实测值吻合很好,并能较准确地预测YG6梯度硬质合金弹性系数沿梯度方向的变化规律。Gradient cemented carbide is a new non-uniform composition material with high elastic modulus, good anti-corrosion and low deformation at high temperature. Because of the complex microstructure, the mechanical properties of gradient cemented carbide cannot be better described by currently-existing models of component distribution and elasticity coefficients. In this study, new multi-stage models of component distribution and elastic coefficients including elastic modulus and Poisson＇s ratio are established based on analyses of the existing models and the fabrication technology, and verified by test results of YG cemented carbide. The results show that the new multi-stage models are of importance for the design and fabrication of gradient cemented carbide.

关 键 词：梯度硬质合金 组分分布函数 分段函数模型 弹性模量 泊松比 

分 类 号：TP131[自动化与计算机技术—控制理论与控制工程] TB302.3[自动化与计算机技术—控制科学与工程]