摘要:
This is to provide a coated cutting tool excellent in wear resistance, chipping resistance and fracture resistance than those of the conventional tools. The coated cutting tool comprises a substrate and a coating layer formed onto the surface of the substrate. The coating layer contains an outermost layer. The outermost layer contains NbN. The NbN contains cubic NbN and hexagonal NbN. When a peak intensity at a (200) plane of cubic NbN is made I c , a peak intensity at a (101) plane of the hexagonal NbN is made I h1 , and a sum of peak intensities at a (103) plane and a (110) plane of the hexagonal NbN is made I h2 in X-ray diffraction analysis, a ratio [I h1 /(I h1 +I c )] of I h1 based on a sum of I c and I h1 is 0.5 or more and less than 1.0, and a ratio [I h1 /(I h1 +I h2 )] of I h1 based on a sum of I h1 and I h2 is 0.5 or more and 1.0 or less.
摘要:
A ceramic material includes of β-sialon (Si(6-z)AlzOzN(8-z)), polytype 15R, an intergranular phase, and yttrium. The polytype 15R includes twin grains.
摘要翻译:根据示例性实施方式的陶瓷材料由β-赛隆(Si(6-z)Al z O z N(8-z))和多型15R和晶粒间相组成,并且包含钇,其中多型15R包括双晶粒。
摘要:
Provide is a coated cutting tool having excellent wear resistance and fracture resistance, and having longer life than that of the conventional products. The coated cutting tool of the present invention comprises a substrate and a coating layer formed onto the surface of the substrate. The coating layer contains an ± type aluminum oxide layer. A residual stress value at the (116) plane of the ± type aluminum oxide layer is greater than 0. A residual stress value at the (012) plane of the ± type aluminum oxide layer is smaller than 0.
摘要:
A method of making a cutting tool insert, including positioning and fixing an abrasive tip in a mold, filling the mold with a powder metal mixture, and infiltrating the powder metal mixture around at least a portion of the tip to define a green body. The method further includes compacting the powder metal to define a pressed green body, sintering the pressed green body to yield a sintered body having a metallic portion and a tip portion, and cooling the sintered body to put the tip portion into compression. The tip portion is non-adhesively mechanically attached to the metallic portion.
摘要:
A method for producing a ceramic honeycomb body having large numbers of longitudinal cells partitioned by cell walls, with its peripheral portion removed by machining, comprises rotatably holding the ceramic honeycomb body on a main axis of a lathe, and rotating the ceramic honeycomb body around the main axis, to remove its peripheral portion by machining with a tool; the lathe comprising a first fixing jig on the main axis, and a second fixing jig substantially opposing the first fixing jig; each of the first and second fixing jigs having an abutting end portion opposing each other, the abutting end portion having a smaller outer shape than that of the end surface of the ceramic honeycomb body, and the abutting portion having a substantially flat abutting end surface perpendicular to the main axis; and the ceramic honeycomb body being held by pressing the abutting surfaces of the first and second fixing jigs to both end surfaces of the ceramic honeycomb body, such that the center axis of the ceramic honeycomb body is substantially in alignment with the main axis of the lathe.
摘要:
[Problem to be solved] To provide a cutting tip which is extended in tool life by preventing an increase in the width V B of flank wear and by preventing chipping of the edge. [Solution] The life of a cutting tip 11 is extended by comprising a cutting edge portion 13 made of a high-hardness material to take a thin plate shape and a support portion supporting the cutting edge portion on a reverse side of a rake face.