PRODUCTION OF CBN WIRE

摘要

PURPOSE:To obtain a CBN wire which is uniformly and securely arranged with CBN powder in the surface layer by packing a powder mixture composed of metallic powder and CBN powder into the spacing between the outermost peripheral part and central part of a cylindrical metallic body. CONSTITUTION:The powder mixture D composed of the metallic powder 4 and the CBN powder 3 is packed into the spacing S between the outermost peripheral part 1 and central part 2 of the cylindrical metallic body A and both ends of the metallic body A are hermetically closed. After such metallic body is subjected to known hot working such as extrusion or rolling and is then drawn by cold working to a wire having a required wire diameter. The metal in the outermost peripheral part 1 of the metallic body A remaining as the outermost layer of the wire is removed by polishing or pickling, etc. The CBN wire exposed with the mixed layer D' uniformly held with the CBN powder 3 in the sintered metallic layer 4' as the extreme surface layer of the wire is thus obtd.