Thermal expansion of cemented tungsten carbide
Thermal expansion of cemented tungsten carbide
复制标题
硬质合金的热膨胀
DOI：
--
复制
发表时间：
1937
期刊：
影响因子：
--
通讯作者：
P. Hidnert
中科院分区：
文献类型：
--
作者：
P. Hidnert
本文给出了含钴约6%和13%的碳化钨钴混合物的线性热膨胀数据。这些产品在美国被称为“硬质合金”或Carboloy，在德国被称为WIDIA。四种硬质合金样品的膨胀曲线如图1和图2所示。表2给出了20-400℃不同温度范围内的膨胀系数。含钴5.9%硬质合金的平均膨胀系数在20-60℃范围内从4.4×10-6增加到300-4000℃范围内的5.9×10-6。含钴12.9%-13.2%硬质合金样品的平均膨胀系数。在20~600℃范围内由5.0×10~(-6)增加到300~400℃范围内的6.7×10~(-6)。在20~400℃范围内，含钴约13%的硬质合金样品的平均膨胀系数比含钴约6%的硬质合金样品的膨胀系数大15%。图3显示硬质合金样品的膨胀率随温度线性增加。含钴13.0%的硬质合金的膨胀率大于含钴5.9%的硬质合金的膨胀率。硬质合金样品的膨胀率大于钨的膨胀率，远小于钴的膨胀率。目录页
This paper gives data on the linear thermal expansion of tungsten carbidecobalt mixtures containing about 6 and 13 percent of cobalt. These products are called "cemented tungsten carbide" or Carboloy in the United States and Widia in Germany. The expansion curves of four samples of cemented tungsten carbide are shown in figures 1 and 2. Table 2 gives coefficients of expansion for various temperature ranges between 20 and 400 0 C. The average coefficient of expansion of cemented tungsten carbide containing 5.9 percent of cobalt, increases from 4.4 X 10-6 for the range between 20 and 60 0 C to 5.9 X 10-6 for the range between 300 and 4000 C. The average coefficients of expansion of the samples of cemented tungsten carbide containing from 12.9 to 13.2 percent of cobalt, increase from 5.0 X 10-6 for the range between 20 and 600 C to 6.7 X 10-6 for the range between 300 and 400 0 C. For the range from 20 to 400 0 C, the average coefficients of expansion of the samples of cemented tungsten carbide containing about 13 percent of cobalt are 15 percent greater than the coefficient of expansion of the cemented tungsten carbide containing about 6 percent of cobalt. Figure 3 shows that the rates of expansion of the samples of cemented tungsten carbide increase linearly with temperature. The rates of expansion of the cemented tungsten carbide containing 13.0 percent of cobalt are greater than the rates for the carbide containing 5.9 percent of cobalt. The rates of expansion of the samples of cemented tungsten carbide are greater than the rates of expansion of tungsten and considerably less than the rates of expansion of cobalt. CONTENTS Page