摘要:
An Au plating film (12) is formed on the surface of a plate-shaped metal base (13) made of a metal more base than Au, and the metal base is cut along a line of cutting plane (18) reflecting the visible outlines of a member to form a separator (10). The thus formed separator (10) has an Au plating film (12) on a major surface (10a) and a cut face (16), which is an edge face (16) continuous with the major surface (10a). A part of the metal base (13) is exposed from a part of the cut face (16). The width of the exposed part is 1 mm of less. In such a way, a metal member for fuel cells having a sufficient corrosion resistance and producible readily at low cost, its manufacturing method, and a fuel cell having such a metal member for fuel cells are provided.
摘要:
Disclosed is a carburized machine part which is free from the problem of decreased strength at edge-shaped parts due to excess introduction of carbon. The machine part is produced by processing a case hardening steel of the alloy composition consisting essentially of, by weight %, C: 0.1-0.3%, Si: 0.5-3.0%, Mn: 0.3-3.0%, P: up to 0.03%, S: up to 0.03%, Cu: 0.01-1.00%, Ni: 0.01-3.00%, Cr: 0.3-1.0%, Al: up to 0.2% and N: up to 0.05% and the balance of Fe and inevitable impurities, and satisfying the following condition:
摘要:
Disclosed is a method of predicting damage of dies for plastic processing of metallic materials, typically, forging dies, by predicting brittle fracture ("great crack" or "initial crack") dominating die lives contribute to die design including choice of materials, hardness and configuration of the die. The method is characterized in that the die design is carried out by choosing the condition that none of the anticipated values of brittle fracture, F c1 to F c3 , calculated by the formulae 1 to 3 below exceed the critical values depending on the material used. [ formula 1 ] F c 1 = ( σ m / σ e q ) [ formula 2 ] F c 2 = ( σ m / σ 1 max ) [ formula 3 ] F c 3 = ( σ 1 max / σ e q ) σ m : mean normal stress loaded to the tensile side of the die σ eq : Von Misese's equivalent stress σ 1max : maximum principal stress
摘要翻译:公开了一种通过预测脆性断裂(“大裂缝”或“初始裂纹”)预测金属材料(通常为锻造模具)的塑性加工损伤的方法,其主要模具寿命有助于模具设计,包括材料的选择,硬度和 模具的配置。 该方法的特征在于,通过选择根据所使用的材料,由下式1至3计算出的脆性断裂F c1至F c3的预期值都不超过临界值的条件来进行模具设计。 [公式1]‰F c 1 =(Ãm / eq)[公式‰2]²F c 2 =(Ãm /Ã1 max)[公式‰3]‰F c 3 =(Ã1 max /Ãeq)Ãm:平均应力加载到模具的拉伸侧面:Von Misese的等效应力Ã1max:最大主应力
摘要:
The present invention provides a method for producing a low thermal expansion Ni-base superalloy, which includes: preparing an alloy including, by weight%, C: 0.15% or less, Si: 1% or less, Mn: 1% or less, Cr: 5 to 20%, at least one of Mo, W and Re, which satisfy the relationship Mo + 1/2(W + Re): 17 to 27%, Al: 0.1 to 2%, Ti: 0.1 to 2%, Nb and Ta, which satisfy the relationship Nb + Ta/2: 1.5% or less, Fe: 10% or less, Co: 5% or less, B: 0.001 to 0.02%, Zr: 0.001 to 0.2%, a reminder of Ni and inevitable components; subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200°C; subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850°C and less than 1000°C and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850°C at a cooling rate of 100°C or less per hour; subjecting the alloy to a first aging treatment for precipitating y' phase under the conditions of at a temperature of 720 to 900°C and for 1 to 50 hours; and subjecting the alloy to a second aging treatment for precipitating A 2 B phase under the conditions of at a temperature of 550 to 700°C and for 5 to 100 hours.
摘要:
Disclosed is a method of manufacturing a BPF (bandpass filter) for GHz bands of the structure that an input signal line (2) and an output signal line (3) run with a small gap on one surface of a sheet (1) made by dispersing soft magnetic metal powder in a sheet-formed polymer matrix, an internal line (6) bridges on the signal lines, and a GND line (4) runs on the reverse surface of the sheet. The method comprises inserting an intermediate product made by disposing on both the sides of an insulating film (5) the above-mentioned input signal line (2), output signal line (3) and internal line (6), on one side of the cavity of a mold for injection, and inserting a metal piece for the GND line (4) on the other side of the cavity; and injecting a polymer compound to obtain a molded article.
摘要:
A thin film magnetic sensor (20) comprises a pair of first thin film yoke (24b) and second thin film yoke (24c) each formed of a soft magnetic material, the first and second thin film yokes being positioned to face each other with a gap (24a) interposed therebetween; a GMR film (26) having an electrical resistivity higher than that of the soft magnetic material and formed in the gap so as to be electrically connected to the first thin film yoke and the second thin film yoke; and an insulating substrate (22) made of an insulating nonmagnetic material and serving to support the first thin film yoke, the second thin film yoke and the GMR film. The GMR film is formed on a facing surface of the first thin film yoke positioned to face the second thin film yoke, and the length of the gap is defined by the thickness of the GMR film positioned on the facing surface of the first thin film yoke.