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研磨硬质合金刀具或陶瓷刀具用的磨料,除了金钢石砂轮以外,要算碳化硼的生产率最高。碳化硼过去都是由国外进口的,价格很贵,因此也很少用它。现在已有国产的碳化硼,今后将大量的用在生产中。碳化硼磨膏以配制成硬性磨膏最好。硬性磨膏的成份是30％的石腊(或硬脂)和70％的碳化硼。这种比例制成的磨膏生产率平常,但用得最广;如果要生产率高,可用15％的石腊和85％的碳化硼。配制前必须要的器具有天平、电炉、加热用陶瓷器皿、玻璃填板以及制造磨膏用的钢管模子等。钢管模子尺寸大小要选择的恰当,它是决定磨膏制成后组织是否均匀的主要因素,太大了,磨膏冷却速度太慢不易凝固,将会使碳化硼下沉石腊上浮,得到分布不均匀的磨膏。根据实践,大约用内径为20公厘,管长100公厘左右的钢管模子最适宜。
Grinding carbide tools or ceramic cutting tools with abrasive, in addition to diamond grinding wheel, to be considered the highest productivity boron carbide. Boron carbide in the past are imported from abroad, the price is expensive, so it is rarely used. There are already domestic boron carbide, will be used in large quantities in the future. Boron carbide abrasive paste to formulate the best abrasive. The ingredients for the hard paste are 30% paraffin (or stearin) and 70% boron carbide. This ratio results in an average, but most widely used abrasive paste, with 15% paraffin wax and 85% boron carbide for high productivity. Before the preparation must have the balance, electric furnace, heating ceramic ware, glass filler and the manufacture of paste with steel pipe mold and so on. Steel tube mold size to choose the right size, it is to determine whether the tissue made after the main component of the paste is too large, too large, too slow cooling paste grinding solidification, the boron carbide will fall sunken paraffin, get the distribution Uneven wear cream. According to practice, about the inner diameter of 20 mm, the pipe length of 100 mm pipe mold most appropriate.