公开(公告)号：US20100313489A1

公开(公告)日：2010-12-16

申请号：US12521452

申请日：2008-01-15

申请人： Minori Teramoto ,  Satoeu Kukino ,  Tomohiro Fukaya ,  Machiko Abe

发明人： Minori Teramoto ,  Satoeu Kukino ,  Tomohiro Fukaya ,  Machiko Abe

IPC分类号： B23B27/14 ,  C04B35/583

CPC分类号： C04B35/4885 ,  C04B35/5831 ,  C04B35/6303 ,  C04B35/645 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/3843 ,  C04B2235/3856 ,  C04B2235/386 ,  C04B2235/3865 ,  C04B2235/3886 ,  C04B2235/402 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/80 ,  C04B2235/96

摘要： A cBN sintered body excellent in chipping resistance and wear resistance in working difficult-to-machine centrifugally cast iron is provided. The present invention is directed to a cBN sintered body composed of a cBN component not lower than 50 volume % and not higher than 90 volume % or not lower than 40 volume % and not higher than 85 volume %, characterized in that the cBN sintered body contains alumina and zirconia not lower than 9 volume % and not higher than 50 volume % and a weight ratio of zirconia/alumina is not lower than 0.1 and not higher than 4. A tool including the cBN sintered body according to the present invention in a portion involved with cutting achieves improved performance in working difficult-to-machine centrifugally cast iron as compared with a conventional tool made of a cBN sintered body, because the cBN sintered body is excellent in strength, hardness and toughness.

摘要翻译： 提供了一种在工作难加工的离心铸铁中耐破碎性和耐磨性优异的cBN烧结体。 本发明涉及由不低于50体积％且不高于90体积％且不低于85体积％的cBN组分构成的cBN烧结体，其特征在于，所述cBN烧结体 含有不低于9体积％且不高于50体积％的氧化铝和氧化锆，并且氧化锆/氧化铝的重量比不低于0.1并且不高于4.包含根据本发明的cBN烧结体的工具 由于cBN烧结体的强度，硬度和韧性优异，因此与由cBN烧结体制成的常规工具相比，与切削相关的部分提高了加工难加工的离心铸铁的性能。