摘要
本文选用4种不同粒度的WC粉,采用典型硬质合金制备方法制备出4批普通合金样品,在4种WC粉中选两种不同粒度的WC粉按照一定的质量配比制备出4批双晶硬质合金样品,用LAMOS Master金相分析软件计算样品金相照片上的WC晶粒截面面积并进行升序排序并得出面积差曲线。结果表明,普通合金样品的面积差曲线无特征峰,双晶粒度样品有特征峰。特征峰的中间位置为粗细WC的分界点,用截线法测出的粗WC与细WC的平均晶粒度与样品所用WC粉对应普通合金样品的WC平均晶粒度一致。将双晶硬质合金样品的显微组织、粗细WC平均晶粒度、粗细WC颗粒数量比及WC粉质量比等数据建立双晶硬质合金的WC组织特征参数。
Four types of WC powder with different particle size were chosen as raw materials, then four batches of ordinary cemented carbide were prepared by traditional manufacturing methods, and four batches of cemented carbide with dual grain structure were prepared through choosing two types of these WC powder with different particle size according to a certain mass ratio. The LAMOS Master metallographic analysis software was used to calculate the section area of WC grains on the metallographic photos, then the data was sorted by the section area in ascending order, finally the difference curve of area was obtained. The results show that there is no characteristic peak in the difference curve of area for the ordinary cemented carbide, however there is a characteristic peak for the dual grain structure cemented carbide. Defining the middle of characteristic peak for the dividing line of coarse and fine WC, the average grain size of coarse and fine WC measured by the linear-intercept method is close to the average grain size of WC powder used in corresponding ordinary cemented carbide. The microstructure characteristic of WC in the dual grain structure cemented carbide is founded from the average grain size, number ratio and mass ratio of coarse and fine WC, the microstructure of the cemented carbide, etc.
出处
《硬质合金》
CAS
2015年第5期285-293,共9页
Cemented Carbides
关键词
双晶硬质合金
晶粒分离
平均晶粒度
质量配比
dual grain structure cemented carbide
grain separation
average grain size
mass ratio
