Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第17卷    第5期    总第98期    2007年5月

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文章编号:1004-0609(2007)05-0763-07
新型梯度硬质合金的组成分布函数与
弹性系数模型
饶秋华1,张丽娟1,贺跃辉2

(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
)

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。

 

关键字: 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

New multi-stage models of component distribution and elastic
coefficient of gradient cemented carbide
RAO Qiu-hua1, ZHANG Li-juan1, HE Yue-hui2

1. School of Civil and Architectural Engineering , Central South University, Changsha 410075, China;
2.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract: 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.

 

Key words: gradient cemented carbide; component distribution; multi-stage model; elastic modulus; Poisson’s ratio

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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