摘要:
A centrifugally cast composite roll comprising an outer layer having a composition comprising by mass 2.5-9% of C, 0.1-3.5% of Si, 0.1-3.5% of Mn, and 11-40% of V, the balance being Fe and inevitable impurities; an intermediate layer made of a high-speed steel alloy, which is formed inside the outer layer; and an inner layer made of cast iron or steel, which is formed inside the intermediate layer.
摘要:
A centrifugally cast composite roll comprising an outer layer having a composition comprising by mass 2.5-9% of C, 0.1-3.5% of Si, 0.1-3.5% of Mn, and 11-40% of V, the balance being Fe and inevitable impurities; an intermediate layer made of a high-speed steel alloy, which is formed inside the outer layer; and an inner layer made of cast iron or steel, which is formed inside the intermediate layer.
摘要:
A method for producing an outer layer for a roll having a structure having MC carbide dispersed at an area ratio of 20-60%, comprising the steps of (1) centrifugally casting a melt having a composition comprising, by mass, 2.2-6.0% of C, 0.1-3.5% of Si, 0.1-3.5% of Mn, and 8-22% of V, the balance being Fe and inevitable impurity elements, to produce a cylindrical body comprising an inner layer having concentration MC carbide, an MC-carbide-poor outer layer, and a concentration gradient layer between the inner layer and the outer layer, in which the area ratio of MC carbide changes, and (2) cutting the cylindrical body to a depth at which the area ratio of MC carbide is 20% or more.
摘要:
A method for producing an outer layer for a roll having a structure having MC carbide dispersed at an area ratio of 20-60%, comprising the steps of (1) centrifugally casting a melt having a composition comprising, by mass, 2.2-6.0% of C, 0.1-3.5% of Si, 0.1-3.5% of Mn, and 8-22% of V, the balance being Fe and inevitable impurity elements, to produce a cylindrical body comprising an inner layer having concentration MC carbide, an MC-carbide-poor outer layer, and a concentration gradient layer between the inner layer and the outer layer, in which the area ratio of MC carbide changes, and (2) cutting the cylindrical body to a depth at which the area ratio of MC carbide is 20% or more.
摘要:
An intelligent information retrieval program generation system can easily generate an intelligent information retrieval program that is applicable to a wide-area information network such as the Internet. When questions to be used as criteria for determining conclusions, answer alternatives to the questions, and information of conclusions are inputted, a table defining unit defines a conclusion determining table which comprises answer alternatives to each of the questions and conclusions. A knowledge establishing unit displays the conclusion determining table on a display screen, receives inputted answer conditions for the conclusions to be selected, and establishes the answer conditions in the conclusion determining table. A retrieval program generator generates an intelligent information retrieval program for decoding the conclusion determining table in which the knowledge has been established, displaying questions, receiving answers to the questions, and determining conclusions depending on the answers. The retrieval program generator further generates a document containing the intelligent information retrieval program by incorporating the generated intelligent information retrieval program into a document description language in the form of a hypertext.
摘要:
A method of selecting a menu in accordance with a maximum correlation between a user input and stored parameters. A user is prompted to input a description of the desired function to be performed by the program. Keywords are selected from the users input and correlation factors are developed between the user input keywords and each of the various menus items within the program. If a correlation factor exceeds a predetermined threshold value, then the menu associated with the maximum correlation factor is displayed. As a result, an inexperienced user can, by interacting with the program choose a menu corresponding the user's desired function for the program.
摘要:
A chromosome is decoded by a decoding unit, and converted into parameters of a problem model calculation unit. In the problem model calculation unit, a controller executes a local search method unit, a GA search unit, or a stochastic search unit while suitably selecting any of them, so that a solution is generated. If a constraint violation is detected by a constraint violation determination unit during a solution generation process, an added part (a part which causes a constraint violation) is removed from a current solution by the constraint violation processing unit, and the solution generation process is continued.
摘要:
A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.
摘要:
A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.
摘要:
A fatigue failure diagnostic method of a turbocharger in accordance with the present invention is a method for diagnosing the fatigue failure of a turbocharger (5), comprising the steps of measuring the revolution speed of the turbocharger (5), computing an accumulated fatigue value (Ft) based on the measured revolution speed, and executing the fatigue failure judgment of the turbocharger (5) by comparing the computed accumulated fatigue value (Ft) and the prescribed fatigue limit value (F1).