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JP2754999B2 |
PURPOSE: To provide a method and a device for carrying out inclined rolling for nearly eliminating a gap between the inclined roll and a disk roll and preventing down buckling. CONSTITUTION: A billet 6 is rolled for perforation by an inc...
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JPH10130687A |
To obtain a lubricant compsn. for hot working which can reduce the coefficient of friction between a working tool and a workpiece and prolong the service life of a working tool in hot working, such as tilting rolling of a seamless steel ...
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JPH10128427A |
To minimize the roughness of the outer surface of a seamless steel tube, to minimize the polishing work or the like in off-line and to save labor by jetting a high pressured water on the outer surface of a hot tube under carrying before ...
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JP2752042B2 |
An arrangement for inclined rolling of tube-and bar-shaped rolling articles has two or more driven rollers rotatable about a longitudinal axis of a rolling article and supported in or on a rotor which surrounds the rolling article. The r...
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JP2750322B2 |
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JPH1094808A |
To provide a roller shoe for inclined rolling mills by which so-called flare (enlargement of the diameter in end parts) in the end parts of a pierced or stretched tube stock in the inclined rolling mill for manufacturing the seamless ste...
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JP2737310B2 |
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JPH1085804A |
To provide a method for manufacturing a seamless tube which consists of an α-type or α+β type titanium alloy containing an inhibstor of the coarsening of structure, whose strength and ductility are higher in the same order in both dir...
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JPH1080715A |
To use a steel tube cold worked as it is by controlling a final finish working rate as taking a ratio of a working rate between tube thickness and outer diameter for a parameter when producing a two phase or austenitic stainless steel tu...
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JP2730460B2 |
PURPOSE: To improve a peeling limit, and to reduce the generation factor of a guide shoe mark by that the projection of a piercing shell between a main roll and a guide shoe, becomes less. CONSTITUTION: When piercing a seamless steel pip...
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JP2729209B2 |
To provide a method for diagonal piercing rolling which is capable of averting the incorrect rolling and working hindrance of thick or thin tube stocks of an about middle extent and a diagonal piecing roll stand for this purpose. This ma...
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JP2726588B2 |
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JPH1058014A |
To contrive reduction of flaws on the outside surface to which a guide is related and prolongation of the life of the guide in rolling with an elongator. In the case that a hollow tube stock after piercing with a piercer is elongation ro...
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JP2718865B2 |
PURPOSE: To obtain a steel tube as rolled having a fine grain structure of over an austenitic grain size No 8 by cooling after a hollow steel tube stock containing the prescribed quantity of Nb is worked under the prescribed condition wi...
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JP2715396B2 |
PURPOSE: To improve safety of descaling the inside surface of a seamless steel tube. CONSTITUTION: By this device, a mandrel bar 2 fitted with an injecting nozzle 1 at a tip end is supported by a bar block 3 and fixed on a truck 4 and th...
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JPH1043803A |
To extend plug life by using a temp. control means, arithmetic means, controller, etc., in the piercing rolling method of hot seamless metal tube so as to suppress erosion of the tip part and side face part of a plug. An arithmetic means...
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JP2705499B2 |
PURPOSE: To improve the quality of an inside surface and to reduce the maintenance cost as to the inside surface. CONSTITUTION: In a method in which a hot drawn seamless carbon steel tube is manufactured by drawing it to reduce the thick...
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JP2703814B2 |
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JP2696718B2 |
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JP2697144B2 |
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JPH105820A |
To provide a piercing rolling method of a metallic tube. When the opening degree of main rolls is expressed by Rg, the opening degree of guide members by Gg, the outside diameter of a solid round billet by Bd, the effective length of a p...
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JP2558263Y2 |
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JP2692524B2 |
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JP2692474B2 |
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JPH09310121A |
To produce a steel tube excellent in high temp. creep fracture characteristics and toughness by subjecting a steel stock having a specified compsn. to blooming, executing cooling, holding the same under soaking to an austenite single pha...
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JP2671960B2 |
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JP2672441B2 |
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JPH09271810A |
To prevent generation of flaw on an external surface by specifying so that a radius of a corner part of slab has a specified ratio to a side length when a martensitic stainless steel slab is pierced by a press roll piercer. A martensitic...
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JP2550896Y2 |
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JP2550897Y2 |
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JP2661490B2 |
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JP2662122B2 |
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JPH09239416A |
To surely prevent the generation of inadequate pullingout of a mandrel without frequent control action during operating a retract mandrel mill and to stably execute the pulling-out of the mandrel over a long period. During operating roll...
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JPH09220603A |
To highly efficiently manufacture a thick-wall seamless steel tube having the highly precise dimension of an outside diameter by restricting the variation of outside diameter by a plug mill, controlling the temp. of a stock tube to a pre...
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JP2643369B2 |
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JP2641834B2 |
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JPH09201604A |
To provide a method by which a seamless tube without a carburized layer on its inside surface is highly efficiently manufactured. Rough rolling with a mandrel mill using a graphitic lubricant, reheating and finish rolling with a stretch ...
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JP2636683B2 |
PURPOSE: To eliminate a hot saw and to improve the yield of tube manufacturing by pressing down fins, over fillings which are generated by elongating with a mandrel mill and crushing allowance at the time of bar stripping by providing a ...
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JP2605541B2 |
PURPOSE: To prevent indents in the shape of an inside pit given by pressing in inside scales of a hollow tube stock. CONSTITUTION: A draw starting position of the hollow tube stock 3 by rolling rolls 1 and a plug 2 is set on the outlet s...
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JP2605561B2 |
PURPOSE: To measure the pass center of bar steadyer with high accuracy and in a short time. CONSTITUTION: This device consists of a laser beam emitting device 2 irradiating with laser beam in the opposite direction which is provided on o...
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JP2605560B2 |
PURPOSE: To simultaneously measure not only the roll center of bar steadyer but the parallelism to the mill center. CONSTITUTION: This device consists of a laser beam emitting device irradiating in the opposite direction with laser beam ...
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JPH09108712A |
To prolong the life of a guide shoe, in rolling a seamless steel tube by a inclined rolling mill, by providing a water passage inside the guide shoe of the rolling mill and rolling with this passage cooled by water. A crank-shaped water ...
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JPH09108711A |
To eliminate uneven thickness produced in base stock, forming and bead grinding, to allow on-line tube making of a steel tube having a satisfactory dimensional precision comparable to a conventional drawn tube, and to obtain a technology...
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JPH0994623A |
To provide a manufacturing method for a metallic tube with spiral fins. In the manufacturing method for the metallic tube with the spiral fin having ≥5mm height on the outer periphery of a pipe stock by applying cold-cross helical roll...
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JP2596861B2 |
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JP2596860B2 |
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JP2595856B2 |
PURPOSE: To prevent the generation of a rash flaw on an inner surface in manufacture of a seamless clad metallic tube by hot rolling work of a hollow double tube stock which a metal difficult to be worked is arranged to the inner layer. ...
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JPH0987743A |
To provide a method for producing a low yield ratio and high tougness rectangular steel pipe low in yield ratio, excellent in low temp. toughness and free from the need of a heat treating stage. A steel stock contg. ≤0.20% C and prefer...
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JP2591386B2 |
PURPOSE: To prevent carburization, which tends to be a problem when graphite lubricant is used, and to prevent the dents on the inside of a pipe due to oxide scale. CONSTITUTION: A mixture of a calcium compound and graphite is used as th...
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JPH0970604A |
To manufacture a titanium pipe at a low cost without making a rolling flaw occur on the outside surface of the pipe by Mannesmann rolling method. After coating by thermal spraying or application of a metal containing 90% Al or over on th...
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