Patent application number | Description | Published |
20080214383 | Cubic Boron Nitride Sintered Body - The present invention provides a cubic boron nitride sintered body, which achieves both of superior chipping resistance and wear resistance. | 09-04-2008 |
20080254282 | Cbn Sintered Body for High Surface Integrity Machining and Cbn Sintered Body Cutting Tool - In high efficiency cutting of very hard and hard-to-cut ferrous materials, compared with conventional cBN sintered body tools, the fatigue life of the machined part is improved and a longer lasting tool is provided by controlling the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual of compression stress. | 10-16-2008 |
20080286558 | Cbn Sintered Body for High Surface Integrity Machining, Cbn Sintered Body Cutting Tool, and Cutting Method Using the Same - To provide a high cBN content ratio sintered body that improves fatigue life of the machined part and has a longer tool lifespan than conventional cBN sintered body tools by suppressing the production of the affected layer by machining formed on the machined surface of the workpiece to be cut and by promoting residual compression stress. That is a cBN sintered body according to the present invention is a cBN sintered body for high surface integrity machining having a cBN component of not less than 87% and not more than 99% by volume % and a thermal conductivity of 100 W/m·K or more; and the outermost surface of the cBN sintered body | 11-20-2008 |
20080292415 | Cutting Tool for High-Quality High-Efficiency Machining and Cutting Method Using the Same - It is an object to provide a cutting tool which can perform high-quality, high-efficiency machining of a workpiece such as hardened steel. | 11-27-2008 |
20090120011 | Composite Sintered Body - A composite sintered body according to the present invention contains at least cubic boron nitride and a binder. Cubic boron nitride has a continuous structure as a result of bonding of a plurality of cubic boron nitride particles to each other. The binder has a continuous structure as a result of bonding of a plurality of binder particles to each other, that are present in a region except for a bonding interface where the cubic boron nitride particles are bonded to each other. | 05-14-2009 |
20090169840 | Composite sintered body - A composite sintered body according to the present invention contains at least cubic boron nitride and a binder. Cubic boron nitride has a continuous skeleton structure as a result of bonding of a plurality of first cubic boron nitride particles to each other. The binder has a continuous structure as a result of bonding of a plurality of binder particles to each other, that are present in a region except for a bonding interface where the first cubic boron nitride particles are bonded to each other. Second cubic boron nitride particles isolated from the first cubic boron nitride particles forming the skeleton structure are dispersed in the continuous structure of the binder particles. | 07-02-2009 |
20090202314 | BORING TOOL AND HOLDER FOR THE SAME - One object of the present invention is to increase stability for fixing a cutting tool with a holder formed of a sleeve, and to improve machining accuracy of a boring tool using the holder and prevent chipping of a cutting edge. In a holder for a boring tool holding a bar-shaped cutting tool by receiving it in a center hole in a sleeve and clamping it with clamp means, the sleeve is provided with a slit cutting a region from the center hole in the sleeve to an outer periphery surface thereof lengthwise from a front end to a longitudinal partway portion of the sleeve, and is further provided with a fastener tightening a slit-formed portion of the sleeve to change an inner diameter of the center hole. | 08-13-2009 |
20090208301 | Diamond Sintered Compact - An object is to raise both the wear resistance and chipping resistance of diamond sintered compacts while taking advantage of the characteristics of highly chipping-resistant microfine-grain diamond sintered compacts. A sintered diamond layer | 08-20-2009 |
20100088969 | DIAMOND SINTER - A diamond sinter which has higher hardness than conventional diamond sinters and is excellent in strength including chipping resistance and wearing resistance. The diamond sinter comprises diamond particles and a binder and is characterized in that the binder comprises: a solid solution comprising carbon, tungsten, and at least one element selected from the group consisting of titanium, zirconium, vanadium, niobium, and chromium; and an iron-group element represented by cobalt. It is further characterized in that adjacent diamond particles are bonded to each other. | 04-15-2010 |
20100112332 | DIAMOND SINTERED BODY AND METHOD FOR PRODUCING SAME - Provided are a diamond sintered body having higher strength and more excellent wear resistance than a conventional diamond sintered body, and a method for producing such a diamond sintered body. The diamond sintered body includes diamond particles, a binder, and a void. The diamond particles have a content of not less than 80% by volume but less than 98% by volume. The binder includes a solid solution containing at least one element selected from a group consisting of titanium, zirconium, vanadium, niobium, and chromium, carbon, and tungsten, as well as an iron group element. Neighboring ones of the diamond particles are bonded to one another. The method provides such a diamond sintered body. | 05-06-2010 |
20100313489 | cBN SINTERED BODY AND TOOL MADE OF cBN SINTERED BODY - 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. | 12-16-2010 |