摘要:
A super hard metal roll assembly and a process for producing it are disclosed. Initially, a powdered mix of super hard metal materials is moulded into a hollow cylindrical moulding. The moulding is then fitted about a super hard metal cylindrical element such as roll, cylinder, pillar or shaft, and sintered to contract to a bushing tightly engaging the outer periphery of the cylindrical element to produce a super hard metal roll assembly. The roll assembly may be further treated in a high temperature and high pressure inert gas in order to eliminate voids at the interface between the bushing and the cylindrical element.
摘要:
This invention relates to a highly hard material coated article which comprises a substrate of tool or part consisting of cermets, cemented carbides, tool steels or stainless steels and at least one highly hard material coated on the surface thereof, selected from the group consisting of carbides, nitrides and carbonitrides of at least one of titanium, zirconium and hafnium and those in which oxygen is dissolved, the coating being formed by an ion plating method wherein the accelerating voltage is high in a short time at the initial stage only, the crystals of the coated film being strongly orientated in the direction of for the surface of the tool or part so that the diffraction intensity ratio of the peak from the {220} plane and the secondly strong diffraction peak in the X-ray diffraction using Cu-K.alpha. ray, that is, the diffraction intensity ratio is 15 or less of the latter to 100 of the former and the half value width of the diffraction peak from the {220} plane of the coating film being 0.8.degree. or more on 2.theta. scale.
摘要:
This invention relates to a highly hard material coated article which comprises a substrate of tool or part consisting of cermets, cemented carbides, tool steels or stainless steels and at least one highly hard material coated on the surface thereof, selected from the group consisting of carbides, nitrides and carbonitrides of at least one of titanium, zirconium and hafnium and those in which oxygen is dissolved, the coating being formed by an ion plating method wherein the accelerating voltage is high in a short time at the initial stage only, the crystals of the coated film being strongly orientated in the direction of for the surface of the tool or part so that the diffraction intensity ratio of the peak from the {220} plane and the secondly strong diffraction peak in the X-ray diffraction using Cu-K.alpha. ray, that is, the diffraction intensity ratio is 15 or less of the latter to 100 of the former and the half value width of the diffraction peak from the {220} plane of the coating film being 0.8.degree. or more than 2 .theta. scale.
摘要:
There is provided a coated tool steel having a tool steel substrate and at least one layer of a hard film overcoated on the substrate. The film consists of a B-1 type solid solution selected from carbides, nitrides and carbonitrides of at least one of titanium, zirconium or hafnium, and the breadth of the peak, at half maximum intensity, of Cu-K.alpha. diffraction from the (200) plane of the film, being not less than 0.4 degree on a 2 .theta. scale. The invention further provides a machine tool having at least one cutting part thereof formed from the coated tool steel described above. The coated steel provided herein has excellent wear resistance.
摘要:
The present invention relates to a process of physical vapor deposition which homogeneously and tightly coats hard compounds on the surface of cutting tools, parts requiring wear resistance or ornaments such as a watch case and the like in order to improve wear resistance, heat resistance, corrosion resistance, appearance and the like of said tools, parts or ornaments.The present invention can provide a method of physically coating a solid solution consisting of at least one compound selected from the group consisting of carbides, nitrides or oxides of metals belonging to IVb, Vb and VIb groups of the Periodic Table and/or aluminum oxide and zirconium oxide on the surface of said tools, parts or ornaments in the form of a single layer or multiple-layers, wherein the surface of said tools and the like is subjected to sputter cleaning in the atmosphere of hydrogen or the gaseous mixture of hydrogen and inert gas wherein hydrogen is present at 20% by volume or more, to homogeneously clean said surface of said tools and the like and as a result, the adhesion of the coating consisting of said compounds on said tools and the like is improved and equalized. Thus the above-mentioned properties of said tools and the like is further improved.
摘要:
An objective of the present invention is to enhance reliability of recorded data by preventing deterioration of OPC (Optimum Power Calibration) accuracy due to an influence of inter-layer interference in an optical disk device capable of writing in a multilayer optical disk. Aiming at the objective, a relationship between asymmetry and a signal modulation depth, which are measured by use of a standard driver is referred, and thereby an offset caused by a device, a disk, a writing state of another layer and the like is compensated. Thus, OPC is executed.
摘要:
A surveillance camera apparatus includes a first storage unit for storing a size of pixels configuring a image-sensor, a computation unit for performing a computation using first information, second information, third information, and fourth information to calculate angle information on a plurality of vertex-points, the information stored in the first storage unit being defined as the first information, a focal length of an optical lens being defined as the second information, angle information on an optical axis that passes through a rotation center of the surveillance camera apparatus as the third information, and pixel information corresponding to a plurality of vertex-points that form a region to be masked whose image has been picked up by the image-sensor being defined as the fourth information, and a second storage unit for storing the computation result by the computation unit.
摘要:
This invention relates to a coated cutting tool suitable for high speed cutting working and a process for the production of the same. The feature of the present invention consists in a coated cutting tool comprising a coating layer consisting of an inner layer and outer layer on a surface of a substrate consisting of a cemented carbide such as tungsten carbide-based cemented carbide, etc., the inner layer being composed of a mono-layer of titanium carbonitride in contact with the substrate, a double layer of titanium nitride of 0.1 to 2 .mu.m in thickness, in contact with the substrate, and titanium carbonitride directly above it or a multi-layer provided thereon consisting of titanium carbide, etc., in which the chlorine content in the inner layer is at most 0.05 atom % on average throughout the inner layer, the ratio of the peak intensities of the specified planes in the X-ray diffraction of the above described titanium carbonitride in the specified range and as the inner layer, there are provided coating layers consisting of a first layer of titanium nitride in contact with the substrate and a second layer having a hardness of 160 to 2400 kg/mm.sup.2, and a process for the production of the same. The coated cutting tool of the present invention exhibits a high wear resistance of the coating itself, tenacious adhesiveness of the coating film and substrate and excellent stripping resistance during cutting.
摘要:
In an optical disk apparatus and a method for determining the recording power for the same, for determining the optimum value of a laser power when recording data onto a high density optical disk, a test signal is recorded with changing the recording power Pw while fixing an erasing power Pe. Reproduction is made on the signal recorded so as to obtain a “β” value indicative of asymmetry of the reproduction signal to each the recording power. In this instance, the “β” value, or the optimal recording power Pwo is determined, with utilizing an area or region, being called APC region, which is provided in a part of the recording regions, which are divided into a large number thereof, each being made of a predetermined information recording unit (RUB), being unique to that disk, and further equalization thereof. Herein, the erasing power Pe to be fixed is determined from a result of measurement on a modulation factor, “M” value while recoding another test signal. Or, it may be determined in accordance with strategy information, which is determined for that optical disk in advance. Or, the erasing power Pe may be determined Pe0, irrespective of the optical disks.
摘要翻译:在用于确定其记录功率的光盘装置和方法中,为了在将数据记录到高密度光盘上时确定激光功率的最佳值,在修改记录功率Pw的同时记录测试信号 擦除电力Pe。 对所记录的信号进行再现,以获得指示再现信号对每个记录功率的不对称性的“β”值。 在这种情况下,使用被称为APC区域的区域或区域来确定“β”值或最佳记录功率Pwo,该区域或区域被设置在记录区域的一部分中,被分成大量 每个由预定的信息记录单元(RUB)制成,对于该盘是唯一的,并且进一步的均衡。 这里,从重新编码另一测试信号的调制因子“M”值的测量结果确定要固定的擦除功率Pe。 或者,可以根据预先为该光盘确定的策略信息来确定。 或者,可以确定擦除功率Pe Pe 0,与光盘无关。
摘要:
According to the present invention, an optimum value of a laser power for recording data on a high-density optical disk can be set with high accuracy. A test signal whose erase power Pe is fixed and recording power Pw is varied is recorded on the optical disk. The recorded signal is reproduced and a β value representing asymmetry of the reproduced signal is obtained for each recording power. An optimum recording power Pwo is set from a recording power with which the obtained β value becomes a target β value. Hereby, the fixed erase power Pe is determined from measurement results of a value of a modulation factor M of another test signal recorded. Alternatively, the fixed erase power Pe follows strategy information defined in advance for the optical disk. Or Pe≈0 is used regardless of the optical disk.