以前各厂生产碳化硅磨具大都采用烧结型结合剂,耐火度一般在1350℃以上,有的1400℃,比磨具烧成温度高约50℃～100℃。其目的是为了防止SiC磨料颗粒的分解而产生磨具黑心废品。这样在保证磨具具有一定硬度的情况下就需要较多的结合剂量,因而又造成磨具结构紧密、气孔率低,外观发红、磨具黑心等不良后果。特别是粒度较纵硬度较高的大 Before the factory production of silicon carbide abrasive mostly sintering type binder, refractoriness generally above 1350 ℃, and some 1400 ℃, higher than the firing temperature of the abrasive about 50 ℃ ~ 100 ℃. Its purpose is to prevent the abrasive particles of SiC decomposition and produce abrasive black heart waste. This ensures that the abrasive has a certain hardness of the case requires more binding dose, which in turn causes the abrasive structure, low porosity, the appearance of red, abrasive black heart and other adverse consequences. In particular, the higher the grain size than the higher hardness