摘要:
A dispersion strenghened ferritic steel having excellent ductility and toughness which has been heat treated to produce a matrix having a tempered martensitic structure composed of 0.05 to 0.25% by weight of carbon, 0.1% by weight or less of silicon , 0.1% by weight or less of manganese, 8 to 12% by weight of chromium, 0.1 to 4.0% by weight in total of molybdenum and tungsten, and 0.02% by weight or less of oxygen (exclusive of oxide particles) with the balance being iron and inevitable impurities and, homogeneously dispersed in the matrix, composite oxide particles comprising Y.sub.2 O.sub.3 and TiO.sub.2 in an amount of 0.1 to 1.0% by weight in total of Y.sub.2 O.sub.3 and TiO.sub.2 and a TiO.sub.2 to Y.sub.2 O.sub.3 molar ratio of 0.5 to 2.0.
摘要翻译:分散强化了具有优异的延展性和韧性的铁素体钢,其经过热处理以制备具有由0.05-0.25重量%的碳,0.1重量%或更少的硅,0.1重量%以下的回火马氏体组成的基体 的锰,8〜12重量%的铬,0.1〜4.0重量%的钼和钨,0.02重量%以下的氧(不包含氧化物粒子),余量为铁和不可避免的杂质, 均匀分散在基质中,包含Y2O3和TiO2的总重量为0.1〜1.0重量%,TiO 2与Y 2 O 3摩尔比为0.5〜2.0的Y2O3和TiO2的复合氧化物粒子。
摘要:
A dispersion strengthened ferritic steel cladding tube for use in a nuclear reactor and having a double-layer structure is provided. The cladding tube comprises a tube body made of a dispersion strengthened ferritic steel having a ceramic dispersed therein and containing 8 to 13% by weight of chromium. The inner surface of the tube body is lined with a ferritic steel containing 18 to 30% by weight of chromium. The cladding tube has not only excellent compatibility with a mixed oxide fuel but also excellent high temperature strength and swelling resistance.A method of producing the cladding tube using powder metallurgy is also provided.
摘要:
An assembling device for supplying and assembling a part on an object has a table and a first moving portion disposed above the table, where the first moving portion includes a guide and a movable body. The guide extends in a first direction parallel to a surface of the table out of a range in which the table is positioned. The movable body is movable to a position out of the range in which the table is positioned. The assembling device also has a second moving portion disposed on the table and movable in a second direction transverse to the first direction, the object being mounted on the second moving portion.
摘要:
A bolt fastening method enabling the same effect as when reducing the coefficient of friction of a thread surface without changing the coefficient of friction of the thread surface so as to realize an increase in a bolt axial force generated when fastening the bolt and a bolt fastening device realizing the bolt fastening method are provided.The bolt fastening method of the present invention is a bolt fastening method for when using a bolt having a bolt head and a bolt shank provided with an external thread to fasten fastened members, characterized by intentionally biasing surface pressures of a thread surface and a bolt bearing surface generated when fastening the bolt by imparting a lateral load parallel to the bolt bearing surface to the bolt head and, in that state, imparting a rotational torque rotating the external thread to the bolt head so as to fasten the bolt.
摘要:
A position control system for controlling a motor-driven mechanism capable of occupying a plurality of specified positions comprises a plurality of switches for specifying a position to be occupied by the mechanism and an encoder for generating a specified position signal representative of the specified position and a loading circuit for providing a present position signal representative of the position presently occupied by the mechanism. A read-only memory circuit uses the specified and present position signals to provide a control signal for controlling the motor to move the mechanism to a particular position and a comparison signal and a particular position signal indicative of that particular position. A position detector responsive to the position of the mechanism provides a detection signal representative of the particular position when the mechanism reaches it. A comparator compares the comparison signal from the memory circuit with the detection signal and provides a match signal to the loading circuit when they coincide. In response to the match signal the loading circuit loads the particular position signal into the memory circuit as the present position signal. If the particular position signal matches the specified position signal, the memory circuit provides a control signal that stops the motor. If the particular position does not match the specified position signal, the memory circuit provides a control signal to actuate the motor again. The illustrated embodiment of the system provides a tape recording and reproducing apparatus with four different operating modes.
摘要:
An austenitic steel having improved high-temperature strength as well as corrosion resistance is disclosed. The steel consists essentially of, by weight %:C: not more than 0.15%, Si: not more than 1.0%,Mn: not more than 10%, Cr: 20-30%,Ni: 30-55%,at least one of Mg and Ca in a total amount of 0.0010-0.0500%,Mo: 0.5-6.0% and/or W: 1.0-12.0%, whereinMo(%)+1/2W(%)=0.5-6.0(%),B: 0-0.0100%, Zr: 0-0.200%,Ti: 0-0.30%, Nb: 0-1.00%,V: 0-1.00%, andbalance: Fe and incidental impurities, of which impurities P, S, and Al are restricted to:P: not more than 0.020%,S: not more than 0.010%, andAl: not more than 0.030%,P (%)+S (%)+Al (%) being less than 0.050%.
摘要:
A high-strength high-Cr ferritic, heat-resistant steel exhibiting improved high-temperature, long-term creep strength and a process for producing the same are disclosed. The steel consists essentially of, by weight %:C: not more than 0.2%,Si: not more than 1.0%,Mn: 0.1-1.5%,P: not more than 0.03%,S: not more than 0.03%,Ni: not more than 1.0%,Cr: 5.0-15%,Mo: 0.02-3.0%,W: not more than 4.0%,sol. Al: 0.005-0.04%,N: not more than 0.07%,at least one of V: 0.01-0.4% and Nb: 0.01-0.3%,B: 0-0.02%,at least one of Ca, Ti, Zr, Y, La, and Ce: 0-0.2%, andthe balance Fe and incidental impurities, the A.sub.cl point defined by Formula (1) below being 820.degree. or higher.A.sub.cl (.degree.C.)=765-500 C-450N+30Si-25 Mn+25 Mo+15W+11Cr+50V+30Nb-30Ni+30 sol. Al (weight %).
摘要:
A bolt fastening method enabling the same effect as when reducing the coefficient of friction of a thread surface without changing the coefficient of friction of the thread surface so as to realize an increase in a bolt axial force generated when fastening the bolt and a bolt fastening device realizing the bolt fastening method are provided.The bolt fastening method of the present invention is a bolt fastening method for when using a bolt having a bolt head and a bolt shank provided with an external thread to fasten fastened members, characterized by intentionally biasing surface pressures of a thread surface and a bolt bearing surface generated when fastening the bolt by imparting a lateral load parallel to the bolt bearing surface to the bolt head and, in that state, imparting a rotational torque rotating the external thread to the bolt head so as to fasten the bolt.
摘要:
Carbon dioxide is supplied from a carbon dioxide cylinder (15) to a pressure vessel (13) through reducing valves (18 and 19). The pressure vessel (13) is also supplied with a sodium hypochlorite water solution having a desired concentration through a material supply pipe (12). The material supply pipe (12) is connected to first and second branch pipes (100 and 101) through a distribution valve (102). The sodium hypochlorite water solution supplied through the material supply pipe (12) is partially sprinkled to a gas-phase region in the pressure vessel (13) through the first branch pipe 100, while the remainder of the sodium hypochlorite water solution is supplied to a liquid-phase region in the pressure vessel (13) through the second branch pipe (101). The pressure vessel (13) is provided with a liquid level retention mechanism (25 to 29) is provided to retain the liquid level in the pressure vessel (13) within a constant range. Sterile water produced in the pressure vessel (13) is delivered through a discharge pipe (31) incorporating a throttle valve (42). The pH value of the sterile water is detected by a pH sensor, and the distribution valve (102) is controlled until the detected pH value coincides with an intended pH value.