TAKAGI ICHIU (Total 88 Patents Found)

PURPOSE: To obtain an aluminized steel sheet keeping superior luster of the Al layer at high temp. by aluminizing Al killed steel sheet contg. restricted amounts of C, Mn, Al and N in a molten Al bath contg. Si and by heating and holding the aluminized steel sheet under specified conditions. CONSTITUTION: An Al ...
PURPOSE:To easily form a concave so as to conform reduction quantity to a prescribed quantity with high accuracy by applying hard chrome-plating on only a rough concave with electroplating after the rough concave is formed by excessively grinding with a grinding machine. CONSTITUTION:With the grinding machine with a ca...
PURPOSE:To efficiently obtain a deformed cross section strip sheet excellent with good yield and without any burr, etc., by passing the metal strip sheet to be rolled with its superposing between the work rolls on which grooves are formed in the circumferential direction of the barrel part and peeling off the metal she...
PURPOSE:To avert the defect in hole shapes during etching and to obtain stable press formability by punching holes in a cold rolled aluminum killed steel plate by a photoetching treatment then annealing the same at low temp. in an adequately regulated atmosphere. CONSTITUTION:A cold rolled aluminum killed steel plate o...
PURPOSE: To manufacture the titled steel sheet having superior resistance to cracking by secondary working by cold rolling a dead soft steel contg. C and N fixed with added Ti under specified conditions and by subjecting the resulting steel sheet to open coil annealing under specified conditions to form specified carbu...
PURPOSE:To provide quality which is equal to or higher than that provided by a conventional annealing method to a high-carbon hot-rolled steel strip in a shorter annealing time by heating the strip to the A1 point at a high heating rate and soaking it at a temp. from the A1 point to a specified temp. CONSTITUTION:A hig...
PURPOSE:To reduce annealing time in the stage of annealing a steel under specific conditions by expressing the annealing parameter of the temp. and time thereof by the specific equation and controlling the temp. and the time in such a way that the parameter attains a target value. CONSTITUTION:The annealing parameter a...
PURPOSE: To obtain a band plate with special shaped section of which the sectional shape and sectional hardness distribution are adjusted by adding finish forming process to the rough forming process of the band plate with special shaped section. CONSTITUTION: At the time of manufacturing the band plate with spe...
PURPOSE:To provide superior corrosion resistance and workability to a one-side Al plated steel plate consisting of a steel plate contg. specified amounts of N and C and of an Al plating layer contg. a specified amount of Si by rolling and annealing the plated steel plate under specified conditions. CONSTITUTION:A one-s...
PURPOSE: To improve the working efficiency by specifying the taper effect quantity of each stand of the tandem mill and setting the position of the work roll shift. CONSTITUTION: The taper effect quantity (▵ h) displaying that the metallic strip to be cold rolled on the tandem mill is in the good state is calc...
PURPOSE: To improve heat resistance (darkish discoloration resistance) by hot- rolling a low-C aluminum-killed steel with a specific composition, winding the hot rolled plate at a specific temp., and then applying hot dip aluminizing to the above. CONSTITUTION: A low-carbon Al-killed steel having a composition c...
PURPOSE:To produce a steel plate of superior workability and high joining strength by laminating and press-contacting an aluminum plate on at least one surface of an aluminum hot dipped steel plate and subjecting the same to diffusion annealing, finish rolling and softening annealing. CONSTITUTION:A plate of aluminum o...
PURPOSE:To prevent generation of a crack at the time of bead treatment, by providing a bead part heating device and a lubricating oil heating device on a TIG welding pipe manufacturing device, and also heating the lubricating oil to a transition temperature or above of the bead part. CONSTITUTION:A bead part heating de...
PURPOSE: To introduce copper electroplated steel sheet to a sulfurizing stage in a cleaned surface state by subjecting the steel sheet to acid treatment with an aqueous soln. of HCl or H 2 SO 4 as a treating soln. and one or more kinds of other specified treatments. CONSTITUTION: Before the copper surface of a ...