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采用压痕试验确定碳化钨球齿破碎岩石表面所需的力和凿深。压入作用使岩石表面产生陷坑,其体积也被确定出来。人们可以根据力和凿深来确定冲击式凿岩设备活塞的冲击速度和活塞的质量与长度之比,以及钻凿岩石类材料的能力。由破碎坑的体积,可得到钻进速度方面的数据。一般说来,岩石材料的压入强度随压头接触半径的增加而减小。这种现象是在三种有代表性的岩石材料上作实验发现的。在日常应用中,标准的压痕试验采用半径b=2mm。此外,还对另外三种有代表性的材料作了实验研究,并和前面得到的结果作了比较。
The indentation test was used to determine the force and depth necessary to break the surface of the rock with tungsten carbide balls. Press into the role of the rock surface crater, its volume has also been identified. One can determine the impact speed of the percussion rock drilling rig piston and the mass-to-length ratio of the piston, as well as the ability to drill rock-like materials, based on force and depth of cut. By the size of the crushing pit, the data on the drilling speed can be obtained. In general, the press-in strength of rock material decreases with increasing contact head radius. This phenomenon is experimentally found on three representative rock materials. In everyday applications, the standard indentation test uses a radius b = 2 mm. In addition, three other representative materials were also experimentally studied and compared with the previous results.