摘要
通过确定荷载范围和修正仪器变形引起的系统误差,用三点弯曲法在电子万能试验机上测定了硬质合金的弹性模量。结果表明:硬质合金弹性模量(y)与Co含量(x)存在稳定的线性关系,其关系式为y=0.13x2-14.24x+708.41,即弹性模量随着Co含量的增加而减小。三点弯曲法测试的硬质合金弹性模量结果稳定、精确,与振动法测试的结果相吻合。这种测试方法简单易行,适合于硬质合金的力学性能表征。
By settling the scope of loads and amending system error caused by the elastic deformation of the instrument,the elastic modulus of cemented carbides were determined by means of three-point bend tests on electronic universal testing machine in the present paper.The results showed that the quantitative relationship between the measured elastic modulus（y） and Co content of cemented carbides（x） can be expressed as y=0.13x2-14.24x＋708.41,which shows the elastic modulus decreases with Co content increasing.The measured values of the three-point bend method are reliable and accurate,and are consistent with the measured values of an impulse excitation/acoustic resonance technique.The above mentioned measure method of the elastic modulus of cemented carbides is simple,and can be generally used in mechanical property measurement for cemented carbide materials.
出处
《粉末冶金材料科学与工程》
EI
2010年第6期606-610,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家科技支撑计划资助项目(2007BAE05B02)
关键词
硬质合金
弹性模量
三点弯曲法测试
振动法测试
cemented carbide
modulus of elasticity
three-point bend test
acoustic resonance test
