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61. 发明专利

JPH11158583A B-CONTAINING STAINLESS STEEL AND MANUFACTURE OF HOT ROLLED PLATE THEREOF 失效
公开(公告)号：JPH11158583A
公开(公告)日：1999-06-15
申请号：JP32065897
申请日：1997-11-21
申请人： SUMITOMO METAL IND
发明人： KAJIMURA HARUHIKO , YOSHIDA SHUJI
IPC分类号： B21B3/02 , C21D8/02 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a B-containing stainless steel having high neutron shielding capacity and hardly causing surface cracking at the time of continuous casting and also to provide a method of manufacture of a not rolled plate minimal in cracking by using the stainless steel as a stock. SOLUTION: This B-containing stainless steel has a composition consisting of, by weight, 0.3-0.8% Al,

62. 发明专利

JPH1060602A FERRITIC STAINLESS STEEL EXCELLENT IN MACHINABILITY, GRINDABILITY, AND TOUGHNESS 失效
公开(公告)号：JPH1060602A
公开(公告)日：1998-03-03
申请号：JP22262296
申请日：1996-08-23
申请人： SUMITOMO METAL IND
发明人： HASEGAWA SOJI , ISHIGURO TAKESHI , YOSHIDA SHUJI
IPC分类号： G04B37/22 , C22C38/00 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To obtain a ferritic stainless steel excellent in machinability grindability, and toughness by preparing a ferritic stainless steel having a specific composition free from Ni. SOLUTION: A ferritic stainless steel, having a composition consisting of, by weight,

63. 发明专利

JPH08108305A DRILL CUTTING METHOD FOR STAINLESS STEEL 失效
公开(公告)号：JPH08108305A
公开(公告)日：1996-04-30
申请号：JP24138094
申请日：1994-10-05
申请人： SUMITOMO METAL IND
发明人： YOSHIDA SHUJI , ISHIYAMA SHIGEJI
IPC分类号： B23B35/00
摘要： PURPOSE: To provide austenitic/ferritic stainless steel, which is excellent in drill cutting performance under the condition featured by a very small quantity of additive sulphur, which improves both corrosion resistance and deterioration in tenacity of the steel, and cutting conditions. CONSTITUTION: With the object of stainless steel containing 0.001 to 0.005% sulphur, cutting conditions are as follows: number or revolution of a drill: 30 to 1200r.p.m.; feed per revolution of the drill: 0.05 to 1.0mm; and [feed per revolution (of the drill)]×[number or revolution]: 30 to 200mm/minute.

64. 发明专利

JPH0559166B2 失效
公开(公告)号：JPH0559166B2
公开(公告)日：1993-08-30
申请号：JP2988785
申请日：1985-02-18
申请人： SUMITOMO METAL IND
发明人： YOSHIDA SHUJI , WADA MINORU
IPC分类号： C21C1/02 , C21C1/00 , C21C1/04

65. 发明专利

JPH05156420A HEATING METHOD AND HEATER FOR METALLIC STRIP 失效
公开(公告)号：JPH05156420A
公开(公告)日：1993-06-22
申请号：JP32345591
申请日：1991-12-06
申请人： SUMITOMO METAL IND
发明人： KATO ISAMU , YAMAMOTO MITSUHIRO , KURIYAMA HISASHI , YOSHIDA SHUJI
IPC分类号： C23C2/00 , C23C2/28 , C23C2/40
摘要： PURPOSE:To provide the metallic strip heating method which has excellent electric power efficiency and facilitates temp. control by heating control by making combination use of direct energization and induction heating at the time of continuously heating a metallic strip. CONSTITUTION:The steel strip is admitted into a plating cell 2 contg. molten Zn and while the steel strip is pulled up perpendicularly by a sink roll 3, the surface of the steel strip 1 is galvanized. The amt. of the molten Zn sticking to the steel strip stuck with the molten Zn is adjusted by blowing gases from nozzles 4 near the surface of a galvanizing bath. The galvanized steel strip is heated in a heating zone 5 to alloy the Zn and the Fe of the steel strip and thereafter, the steel strip is taken out after being passed through a temp. holding zone 7, a cooling zone 9 and a top roll 9. The high-frequency induction heating by plural induction coils 5a to 5d and the direct electrical heating to pass a low-frequency current from a power source 12 directly to the steel strip via a feeder 11 immersed in the galvanizing bath and a graphite electrode 10 mounted to the top roll 9 are used in combination for heating the steel strip in the heating zone 5. The steel strip has the good electric power efficiency and is easily heated as the heating temp. control is free.

66. 发明专利

JPH057916A METHOD AND DEVICE FOR HEATING TREATMENT FOR EQUALIZING TEMPERATURE OF H-SHAPE STEEL 失效
公开(公告)号：JPH057916A
公开(公告)日：1993-01-19
申请号：JP18920391
申请日：1991-07-03
申请人： SUMITOMO METAL IND
发明人： YAMAMOTO MITSUHIRO , KURIYAMA HISASHI , YOSHIDA SHUJI
IPC分类号： B21B1/088 , B21B1/08 , B21B45/00 , C21D1/40 , C21D9/00
摘要： PURPOSE:To establish a means which can prevent to the utmost deterioration of the product yield caused by a distortion by correcting exactly and at a low cost the ununiformity of a temperature distribution at the time of hot rolling manufacture of an H-shape steel. CONSTITUTION:In order to equalize the temperature distribution of an H-shape steel immediately after rolling forming, the 'direct energizing heating method' with Joule heating by evergizing from an electrode brought into contact with both ends of a stock to be heated is applied, and an the time of direct evergizing heating treatment, plural electrodes 16 placed so as to be opposed to each other in both ends of the shape steel 11 immediately after rolling forming on a supporting table 14 made of a non-conductor are brought into contact with plural positions of both end web parts, and also, by varying the number of electrodes for evergizing by a power source unit 22 in the beginning and the end of the evergizing time, only a web is partially heated, by which a temperature distribution can be equalized.

67. 发明专利

JPH02250925A PRODUCTION OF FERRITIC STAINLESS STEEL SHEET 失效
公开(公告)号：JPH02250925A
公开(公告)日：1990-10-08
申请号：JP7356789
申请日：1989-03-24
申请人： SUMITOMO METAL IND , NIPPON STAINLESS STEEL CO
发明人： KOIKE MASAO , FUJIKAWA HISAO , YOSHIDA SHUJI
IPC分类号： C21D9/46 , B21B3/02 , C21D8/02 , C21D8/04
摘要： PURPOSE:To form a specific part in the structure of a steel sheet into equiaxed crystal structure and to easily produce a ferritic stainless steel sheet excellent in ridging resistance by controlling the difference between the pouring temp. and the solidification temp. of a slab as a stock to a specific value at the time of producing a ferritic stainless steel sheet. CONSTITUTION:At the time of producing a cold-rolled ferritic stainless steel sheet by hot rolling, annealing and cold rolling of an ingot of ferritic stainless steel to cause a desired sheet thickness followed by a final annealing, the difference between the pouring temp. and the solidification temp. at the time of casting a stainless steel slab as a stock is regulated to =70% of the sheet thickness and, further, the equiaxed crystal part can have a structure with the average grain size of the equiaxed crystal regulated to

68. 发明专利

JPS63230816A METHOD FOR HEATING VACUUM DEGASSING VESSEL 失效
公开(公告)号：JPS63230816A
公开(公告)日：1988-09-27
申请号：JP6628087
申请日：1987-03-20
申请人： SUMITOMO METAL IND
发明人： TAKAHASHI TSUTOMU , NOSHITA SHIGETOMI , KURIYAMA HISASHI , YOSHIDA SHUJI
IPC分类号： F23L5/00 , B01D19/00 , C21C7/10
摘要： PURPOSE:To improve flame temp. and to execute heating under good thermal efficiency by arranging oxygen-enriched burner in a heating tube so that the end thereof is not projected, and controlling oxygen-enriched quantity by oxygen concn. in exhaust gas detected by a sensor. CONSTITUTION:The heating tube 3 having the oxygen enriched burner 1 in a burner box 2 is connected with lower part submerged tube 5 at the one side of a vacuum degassing vessel 4 and heating in the vacuum degassing vessel 4 is executed by oxygen-enriched and gas combustion. The burner axis is inclined downward so that the end part of the oxygen-enriched burner 1 is not come in the heating tube 3. Further, on the inner faces of the heating tube 3 and burner box 2, refractories 7 are lined. By inserting oxygen sensor 10 in the vessel from the submerged tube 6 at exhausting side, the oxygen concn. is detected and based on the detected value, the oxygen-enriched quantity is adjusted by a controller 11. By this method, the vacuum degassing vessel can be efficiently heated.

69. 发明专利

JPS63127004A COMBUSTION METHOD IN FURNACE 失效
公开(公告)号：JPS63127004A
公开(公告)日：1988-05-30
申请号：JP27137086
申请日：1986-11-14
申请人： SUMITOMO METAL IND
发明人： TAKAHASHI TSUTOMU , OYA HIROSHI , NOSHITA SHIGETOMI , YAMAMOTO MITSUHIRO , KURIYAMA HISASHI , HORIKAWA HIROSHI , YOSHIDA SHUJI
IPC分类号： F23C6/04 , F23L15/00
摘要： PURPOSE:To realize a low air ratio combustion using a conventional burner, by providing a catalyst to promote combustion on the inlet side of a flue and by specifying the air ratio, in a method of combustion in a furnace in which an object to be heated, being set in the furnace, is heated by a combustion burner, and the heat of exhaust gas is recovered in the flue. CONSTITUTION:An object to be heated 2 is set in a combustion furnace 1, and the object 2 is heated by a combustion burner 3. A catalyst 5 is provided at the inlet of a flue 4 to promote combustion of unburnt gas, and the heat of exhaust gas is recovered by a heat exchanger 6. In the combustion burner 3, an excess air ratio (Q1/Q2) is to be determined as '1' when logical air flow rate to feed fuel is 'Q2', and the flow rate of actual feed air is 'Q1'. In combustion by a conventional burner 3 that is the burner in which fuel and air are separately fed into a combustion space at high velocity, unburnt gas and unreacted oxygen are produced when an excess air ratio is determined as '1'. However if high temperature is kept in unburnt combustion gas, the gas and the oxygen gradually react on each other to cause them burning. Therefore low excess air ratio combustion is logically possible if the length of a furnace body and that of a flue are very long.

70. 发明专利

JPS62260011A PRELIMINARY TREATMENT OF MOLTEN IRON 失效
公开(公告)号：JPS62260011A
公开(公告)日：1987-11-12
申请号：JP10267986
申请日：1986-05-02
申请人： SUMITOMO METAL IND
发明人： YAMAMOTO TAKAIKU , YOSHIDA SHUJI
IPC分类号： C21C1/00
摘要： PURPOSE:To execute prerefining of a molten iron in a molten iron spout at a good yield of a refining agent without corroding the molten iron spout by providing an ordinary skimmer and plural skimmers having nozzles to blow gas into the molten iron in the molten iron spout. CONSTITUTION:Blast furnace slag 15 is first removed from a slag discharge port 25 by the ordinary 1st skimmer 14 at the time of passing the molten iron 11 tapped from a blast furnace 10 into the molten iron spout 13. The refining agent such as oxygen-contg. gas or CaO or the like is blown from the nozzles 16, 22 on the down stream of the skimmer 14, by which the molten iron is subjected to prerefining such as desiliconizing and dephosphorizing. An inert gas such as N2 is blown from the 2nd and 3rd skimmers 20, 24 having the nozzle 21 directed toward the upper stream at the bottom end part is blown into molten iron flow 11 and the height thereof is adjusted, by which the contact and reaction of the refining agent and the molten iron are accelerated and the yield of the refining agent is improved. The formed molten slag is removed from the slag discharge port 25, by which the corrosion of the molten iron trough by the molten slag is prevented.

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