Abstract: An improved layout of the hearth rolls in an annealing furnace comprises a plurality of ceramic coated rolls and a plated rolls. The ceramic coated rolls are arranged in a region in the annealing furnace, where the temperature is higher than 450.degree. C. On the other hand, the plated rolls are arranged in a region where the temperature is lower than or equal to 450.degree. C. The hearth roll is provided a wear resistant coating of chrome plate or sprayed on ceramic of a thickness greater than or equal to 1 .mu.m and less than or equal to 100 .mu.m. In addition, according to the invention, the hearth roll is provided a surface roughness Ra in the range of 4.5 .mu.m to 20 .mu.m.

Abstract: A grain oriented electromagnetic steel sheet having a very low iron loss is obtained by subjecting a surface of base metal in the sheet after finish annealing to a particular mechanical polishing and has a surface roughness having a center-line average roughness of not more than 0.3 .mu.m after the polishing and the number of abrasive grains embedded in a layer just beneath polished surface of not more than 20,000 grains/cm.sup.2.

Abstract: A high oxidotion resistance Fe-Cr-Al alloy stainless steel foil suitable for forming catalytic converters, specifically for forming automotive catalytic converters. The alloy includes:C: less than or equal to 0.02 Wt %;Si: less than or equal to 1.0 Wt %;Cr: in a range greater than or equal to 14 Wt % to less than or equal to 27 Wt %;Al: in a range greater than or equal to 3.5 Wt % to less than or equal to 6.5 Wt %;La: in a range greater than 0.05 Wt % and less than or equal to 0.20 Wt %;Ce: less than or equal to 0.01 Wt % and the remainder being composed of Fe and inevitable impurities, the foil having a thickness less than or equal to 80 .mu.m.

Abstract: A method and apparatus for recovering blast furnace gas for utilizing in a power plant such as an electric power generator employs a plurality of cooling arrangements. The cooling arrangments includes a first arrangement located upstream of a dust-removal equipment for controlling temperature of blast furnace gas to be about or below a critical temperature of the dust-removal equipment. The cooling arrangments also include a second arrangement located downstream of the dust-removal equipment and upstream of a power generator turbine for controlling gas temperature to be about or below a critical temperature of the turbine. The first and second arrangements are operative independently of each other in response to gas temperature.

Abstract: A substrate including a disk having a pair of opposed faces and being coined to provide a sub-micron flatness and smoothness for the disk faces. The coined disk can then be coated with a layer of storage material and used as a storage medium. Apparatus and a method for forming the coined substrate includes means for moving a plurality of disks along a predetermined path after the disks have been formed by blanking or stamping. The disks are cleaned before being coined and then stacked into containers which can be closed for transit to a point of use. The coining of the disks and the placement of the disks in containers is done under clean room conditions and the resulting coined substrates are free of flaws and defects encountered with the practice of conventional substrate forming techniques.

Abstract: An electrolytic treatment apparatus has a seal structure for establishing liquid-tight seal at an end of electolyte path. The seal structure comprises a seal roll resiliently biased toward a rotary drum periphery and thus establishing sealing contact with a surface of the metal strip. The seal roll may be cooperative with an elastically deformable sealing member for establishing complete liquid-tight seal.

Abstract: An exterior stainless steel sheet is provided comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Al, Al alloy, Zn or Zn alloy to a thickness of 0.1 to 70 .mu.m, preferably 1 to 70 .mu.m. A Zn or Zn-Ni alloy plated stainless steel strip is prepared by degreasing a stainless steel strip, substantially activating the surface of the strip, and electroplating the strip in a zinc or zinc-nickel alloy plating bath at pH 3.5 or lower. During electroplating of one side, the other side of the strip not to be plated is covered with a protective film. A stainless steel sheet comprising a stainless steel substrate and a coating layer formed on one surface of the steel substrate from Zn or Zn alloy to a thickness of 0.1 to 50 .mu.m, preferably 1 to 50 .mu.m is useful in preparing welded pipes.

Abstract: A process of producing cold rolled stainless steel strip, according to the invention, includes preliminary treatment for hot rolled stainless steel strip, in which preliminary treatment, hot rolled stainless steel strip is, at first, treated through annealing and picking process and is subsequently subject cold rolling without introducing rolling mill lubricant at a reduction of more than 5%. The process of preliminary treatment for preparation of cold rolling is useful for producing high surface brightness cold rolled stainless steel strip, which can achieve both of satisfactory quality and high efficiency.

Abstract: An annealing operation is performed with controlling tension force to be exerted on a metal strip depending upon thermal crown of hearth rolls. The thermal crown magnitude is assumed based on various factors influencing for the magnitude of the effective crown.

Abstract: A substrate including a disk having a pair of opposed faces and being coined to provide a sub-micron flatness and smoothness for the disk faces. The coined disk can then be coated with a layer of storage material and used as a storage medium. Apparatus and a method for forming the coined substrate includes means for moving a plurality of disks along a predetermined path after the disks have been formed by blanking or stamping. The disks are cleaned before being coined and then stacked into containers which can be closed for transit to a point of use. The coining of the disks and the placement of the disks in containers is done under clean room conditions and the resulting coined substrates are free of flaws and defects encountered with the practice of conventional substrate forming techniques.

Abstract: A hollow cathode gun used in ion plating through the HCD process comprises a hollow cathode consisting of an outer graphite layer and an inner Ta, W or LaB.sub.6 layer. The deposition device hollow comprises at least one crucible housing an evaporation material, a substrate and a reaction gas inlet, and is provided with a focusing coil surronding the outer layer of the hollow cathode and another focusing coil surrounding the crucible.

Abstract: A cold-rolled and annealed stainless steel strip is completely descaled in a short process period by electrolizing the strip with an aqueous solution containing ranges ofx (g/l)=50 to 270 (1)y (g/l)=(-0.01 x+3.8) to (-0.05x+21) (2),where x is concentration of nitric anid in g/l and y is concentration of chlorine in g/l.

Abstract: A hexagonally crystalline boron nitride containing water-soluble boron containing impurities in such a magnitude that the amount of boron contained in an extract after boiling at 100.degree. C. in pure water is less than or equal to 100 .mu.g per gram of boron nitride. In order to purify the boron nitride, a purification process is carried out according to the steps of preparing fine particles of boron nitride powder; dispersing the boron nitride powder in a dispersion medium and stirred for a given period of time for removing water-soluble boron containing impurities; and drying the boron nitride in atmosphere, in which the vapor pressure is maintained lower than or equal to 10 mmHG and/or the process temperature is maintained lower than or equal to 100.degree. C.

Abstract: Copolyesteramides consisting of specific units can be injection molded at a low temperature into a part having a high heat distortion temperature. A filled composition is obtained by blending the copolyesteramide with an inorganic filler. A magnetic resin composition is obtained by blending the copolyesteramide with an magnetic powder.The copolyesteramide consists essentially of units <I>, <II>, <III>, <IV>, and <V> of the following formulae: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently at least one divalent radical selected from the group consisting of para-phenylene, 2,6-naphthalene, and 4,4'-biphenylene,R.sup.5 is a para- or meta-phenylene radical,X.sup.1 is --NH--,X.sup.

Abstract: A method and a device for collecting a quantoback analysis sample in hot state from a preferred position of a continuously cast steel piece are disclosed. According to this invention, a dish like recess is cut on the surface of cast steel piece while leaving a center column, then the root of left center column is root cut and taken out as sample. A cutting device and a way for accessing the cutting device are presented for operating this process.

Abstract: A powderized material supply system comprises a plurality of reservoir tanks, each containing a different type of powder, and is associated with a metering means for metering the material into an individual supply line. Each individual supply line is associated with a carrier fluid source which supplies, carrier fluid at a controlled pressure for transferring the metered material with the carrier fluid. The individual material suppply lines, each associated with the corresponding reservoir tank, are connected to a post-mixing chamber into which the metered materials are introduced. The post-mixing chamber is connected to a mixture supply line. Each metering means can be controlled for metering a controlled amount of the material in its associated reservoir tank, independently of others. The powderized material supply system is applicable in various industrial or laboratory level processes which require supply of a plurality of powder state fluid material at a variable rate.

Abstract: A zinc-nickel alloy is electrodeposited on a steel strip by passing the steel strip through a stream of sulfuric acid-containing plating solution which contains 2-3 mol/liter in total of Zn.sup.2+, Ni.sup.2+, H.sup.+, and SO.sub.4.sup.2- ions and at least 0.1 mol/liter of Na.sup.+, K.sup.+, or NH.sub.4.sup.+ ion at pH 1 to 2.5, feeding the solution at a flow speed of at least 1 m/sec., and applying electricity between the strip and an anode in the solution such that the current density between the strip and the anode at the outlet of the solution is lower than that at the inlet of the solution. The anode may preferably be divided into a plurality of segments. This process may be carried out by use of a radial or horizontal cell.

Abstract: A method of manufacturing a substrate for a memory disk characterized in that a blank material comprising a non-magnetic metal substrate covered with a non-magnetic metal as an underlayer is subjected to a coining operation by two dies, i.e. upper and lower dies each having flat compressing surface and a certain kind of textured design formed thereon within an apparatus including a mandrel and a die ring arranged to limit the spreading extent of the material whereby a surface having ultra-preciseness and simultaneously impressed texture design is obtained.

Abstract: A method for manufacturing a metal substrate for a memory disk wherein a metal blank material (6) is sandwiched between two dies within a metal mould (3) limiting the extent to which the material spreads, using a core member (4) if necessary, each of the dies having a flat and smooth working surface, the compression force and sheet gauge reduction ratio being regulated or the surface roughness and amount of coating lubricants employed being regulated.

Abstract: A method of manufacturing a substrate for a memory disk characterized in that a blank material comprising a non-magnetic metal substrate covered with a non-magnetic metal as an underlayer is subjected to a coining operation by two dies having flat compressing surfaces within an apparatus including a mandrel and a die ring arranged to limit the spreading extent of the material whereby a surface having ultra-preciseness is obtained.