| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cutting protecting member having improved cutting resistance for preventing the cutting of underground embedded material including information communication/distributing cables, pipes and structures in error during road surface cutting work for road construction. <P>SOLUTION: The cutting protecting member is formed of a ceramics sintered body or a metal-ceramics composite sintered body which has the ratio (Fn/Fns) of a nominal component to that of a standard sample is 0.9 or more when a value (Fn) of the nominal component of cutting resistance to be measured in plunge plane/UP CUT cutting work with a diamond blade is compared with the nominal component of cutting resistance of the standard sample formed of silicon nitride ceramics to be measured under the same cutting work conditions. Preferably, it is of a titanium diboride, silicon nitride, composite SiALON, or zirconia sintered body. It is arranged between the underground embedded material and a road surface or around the embedded material with front and rear end faces linked with each other along the direction of embedding the embedded material. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
