日本住友电气工业公司研制了一种高韧性陶瓷刀具,名叫《黑陶B90》,可用于对铸铁或钢的高速铣削或断续车削.这种产品是将主要原料铝加工成微细颗粒,添加碳化钨,热压成型,经过烧结后,提高韧性和抗热裂性能.《B90》的特点是:①晶粒平均直径小,只及过去粒径1微米的三分之一;结晶方向性少,组织均匀,是一种密度很大的烧结体.②抗弯强度达90公斤,比过去(约70 Japan’s Sumitomo Electric Industries has developed a high toughness ceramic tool called “black pottery B90” for high speed milling or intermittent turning of cast iron or steel. This product is the main raw material aluminum into fine particles, add carbonation Tungsten, hot press molding, after sintering, to improve toughness and thermal cracking performance. “B90” is characterized by: ① grain average diameter of small, and only the last one-third of the particle size of 1 micron; less crystalline orientation, Uniform organization, is a dense sintered body ② bending strength of 90 kg, than in the past (about 70