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1. 发明专利

JPH11207496A CLAMP FOR GAS SHIELDED WELDING MACHINE 失效
公开(公告)号：JPH11207496A
公开(公告)日：1999-08-03
申请号：JP1304098
申请日：1998-01-26
申请人： SHINKO ELECTRIC CO LTD , NIPPON STEEL CORP
发明人： NAKANISHI SADAO , KOBAYASHI ISAO , KASUYA AKIHIRO , IWATA RYUJI
IPC分类号： B23K9/32 , B23K9/095 , B23K37/04
摘要： PROBLEM TO BE SOLVED: To provide a clamp for a gas shielded welding machine by which, even when the clamp is brought close to a welding part, a work to be welded is surely welded through sure generation of arc between an electrode tip end and the work, and the work after welding is free from distortion and deformation. SOLUTION: Clamps 13a, 13b are used for clamping a work to be welded 3 on a fixing table 4 when using a gas shielded welding machine in which arc is generated by applying electric voltage between an electrode 2 and the work 3 while shielding the electrode 2 and the work 3 with a shielding gas and then melting and welding of the work 3 are executed with this arc. Further, these clamps 13a, 13b are composed of an electrically conductive material and at least the part contacting with the welding work 3 is covered with an insulating material 14.

2. 发明专利

JPH0361725B2 失效
公开(公告)号：JPH0361725B2
公开(公告)日：1991-09-20
申请号：JP4519386
申请日：1986-03-04
申请人： NIPPON STEEL CORP
发明人： SHITAWARA NORYUKI , AZUMA KAZUHIKO , KOBAYASHI ISAO
IPC分类号： C21C7/064 , C21C7/10

3. 发明专利

JPH01165709A METHOD FOR REFINING MOLTEN IRON 失效
公开(公告)号：JPH01165709A
公开(公告)日：1989-06-29
申请号：JP32386087
申请日：1987-12-23
申请人： NIPPON STEEL CORP
发明人： MUKAWA SUSUMU , MIZUKAMI YOSHIMASA , KOBAYASHI ISAO , ICHIKAWA KAORU
IPC分类号： C21C1/02
摘要： PURPOSE:To enable refining in single furnace under good efficiency by adding refining agent into molten iron, blowing gas adjusting equilibrium oxygen partial pressure on slag surface, desulfurizing and successively, executing desiliconizing and dephosphorizing treatments without slag off. CONSTITUTION:Refining agent of lime, etc., and slagging promoting agent fluorite, etc., are added on the molten metal in the converter, etc., and oxidizing gas controlling the equilibrium oxygen partial pressure to 0.2-0.8atm. is blown on the slag surface. Gasified desulfurizing reaction between gas and slag is promoted and sulfur is removed from the slag and successively, the desiliconization and dephosphorization are executed without slag off. Then, at the time of gradually increasing oxygen potential in the blowing gas, the desulfurizing reaction from the molten iron into the slag is mainly developed at the initial stage of the refining and the desulfurizing reaction from the slag into the gas is mainly developed after middle stage and as the whole, the desiliconizing and dephosphorizing reactions are promoted at the same time of desulfurizing reaction.

4. 发明专利

JPH0124591B2 失效
公开(公告)号：JPH0124591B2
公开(公告)日：1989-05-12
申请号：JP23824484
申请日：1984-11-14
申请人： NIPPON STEEL CORP
发明人： NODA IKUO , OOSAKI MASAHIRO , KOMAI TADANOBU , KOBAYASHI ISAO
IPC分类号： B22D11/10 , B22D11/103

5. 发明专利

JPS6246611B2 失效
公开(公告)号：JPS6246611B2
公开(公告)日：1987-10-02
申请号：JP1937484
申请日：1984-02-07
申请人： NIPPON STEEL CORP
发明人： MORI MASAAKI , KOBAYASHI ISAO , OGINO SADASHI
IPC分类号： C21C7/072 , C21C5/46

6. 发明专利

JPS62205222A FLUX REFINING METHOD WITH VACUUM DEGASSING VESSEL 失效
公开(公告)号：JPS62205222A
公开(公告)日：1987-09-09
申请号：JP4519486
申请日：1986-03-04
申请人： NIPPON STEEL CORP
发明人： KOBAYASHI ISAO , ISHIKAWA HITOSHI , SHITAWARA NORIYUKI , ONOYAMA SHUHEI
IPC分类号： C21C7/10
摘要： PURPOSE:To improve the refining efficiency of a flux by specifying the position of a tuyere so that the flux is blown into a bubble region formed by a reflux gas and including a part just above the top opening of a riser. CONSTITUTION:A flux blowing tuyere 10 is fitted to a vacuum degassing vessel 1 under the surface of molten steel 3 at the lower part of the vessel 1. The position of the tuyere 10 is set to that a flux can be blown into a bubble region (hatching part) formed by a reflux gas and including a part just above the top opening of a riser 6. The penetration distance of a powdery flux blown into the molten steel 3 is increased to about several ten cm, so the reaction efficiency of the flux is remarkably improved, the amount of the flux used is reduced and the necessary treatment time is shortened.

7. 发明专利

JPS6286113A METHOD AND APPARATUS FOR REFINING MOLTEN STEEL 失效
公开(公告)号：JPS6286113A
公开(公告)日：1987-04-20
申请号：JP22583685
申请日：1985-10-09
申请人： NIPPON STEEL CORP
发明人： MIZUKAMI YOSHIMASA , OSAKI MASAHIRO , KOBAYASHI ISAO , MORI MASAAKI
IPC分类号： C21C7/10
摘要： PURPOSE:To surely refine a small-volume molten steel and to minimize the formation of scrap by closing the molten steel lead-out pipe of a vacuum refining furnace, evacuating the furnace inside to a reduced pressure, introducing a required amt. of the molten steel from the molten steel introducing pipe of the vacuum refining furnace ponitioned in the molten steel in a vessel for the molten steel into the furnace and refining the molten steel. CONSTITUTION:A valve 3 of the molten steel lead-out pipe 2 of the vacuum refining furnace 1 is closed and the furnace 1 inside is evacuated to the reduced pressure. The molten steel 5 is introduced through the molten steel introducing pipe 6 positioned in the molten steel 5 in the vessel 4 for the molten steel into the vacuum refining furnace, then a valve 3a of the molten steel introducing pipe 6 is closed. An inert gas is blown from a blow nozzle 9 into the molten steel 5 in the furnace 1 and the molten steel 5 is refined while alloy iron is added thereto from an alloy iron hopper 10. The refined steel is tapped from the molten steel lead-out pipe 2 into a vessel 7 for casting.

8. 发明专利

JPS59133313A Method for refining steel 失效
标题翻译：炼钢方法
公开(公告)号：JPS59133313A
公开(公告)日：1984-07-31
申请号：JP588683
申请日：1983-01-19
申请人： Nippon Steel Corp
发明人： TSUTSUMI NAOTO , MIZUKAMI YOSHIMASA , KOBAYASHI ISAO , SANO HIROSHI
IPC分类号： C21C7/076 , C21C7/00 , C22C33/04 , C22C33/06
CPC分类号： C21C7/0006
摘要： PURPOSE:To reduce the load of operation of a furnace by putting a metallic oxide for an alloying component and an exothermic reagent on the surface of molten steel in a vessel, reducing the oxide, charging the resulting alloying element into the molten steel, and adding a basicity adjusting agent and a flowability improving agent to slag produced on the molten steel. CONSTITUTION:The oxide 3 of an alloying element and an exothermic reagent 4 are put on molten steel 2 charged into a vessel 1. The oxide 3 is reduced in a reducing reaction part 5, the resulting molten alloying element drops into the molten steel 2, and slag 7 is produced on the surface of the steel 2. A basicity adjusting agent and a flowability improving agent 6 are added to the slag 7. Electrodes 9 are placed on the surface of the steel 2, and while carrying out gas bubbling 8 from the bottom of the vessel 1, the steel 2 is refined under heating using the produced slag 7. The steel is desulfurized and deoxidized by refining, using the slag 7.
摘要翻译：目的：为了通过在容器内的钢水表面放置合金成分和放热试剂用金属氧化物来减少炉的运转负荷，还原氧化物，将所得合金元素装入钢水中，加入碱性调节剂和流动性改进剂。构成：将合金元素和放热试剂4的氧化物3放入装入容器1的钢水2上。氧化物3在还原反应部5中还原，所得熔融合金元素滴入钢水2，在钢2的表面产生渣7.将碱性调节剂和流动性改进剂6加入到炉渣7中。电极9被放置在钢2的表面上，同时从气体鼓泡8 容器1的底部，钢2在加热下使用所产生的炉渣7精炼。钢通过使用炉渣7的精炼进行脱硫和脱氧。

9. 发明专利

JPS56163211A STEEL MAKING METHOD 失效
公开(公告)号：JPS56163211A
公开(公告)日：1981-12-15
申请号：JP6402780
申请日：1980-05-16
申请人： NIPPON STEEL CORP
发明人： TAKEMURA YOUZOU , KATOU IKU , NAKASHIMA TOSHIHIRO , KOBAYASHI ISAO
IPC分类号： C21C5/34 , C21C5/35
摘要： PURPOSE:To dephosphorize and refine molten iron satisfactorily by blowing mixed powder of finely pulverized lime powder and finely pulverized carbon powder directly into the molten iron by using a nonreactive carrier gas during oxygen refining of the molten iron by a top blowing method, and enhancing agitating effect by the gaseous CO produced at that time. CONSTITUTION:Gaseous O2 is blown from an upper lance 3 toward molten iron 3 in a converter 1, thereby refining the molten iron 3. During this oxygen refining, a mixture of finely sulverized lime (e.g.: CaCO3) and finely pulverized carbon powder is blown through a tuyere 5 into the molten iron 3 by a nonreactive carrier gas (e.g.; N2). Thereby, bubbles 6 are first formed in the upper part of the tuyere 5, and reducing gaseous CO is produced within these bubbles and is floated as multiple bubbles 7 in the molten iron 3. By the bubbling effect at the time of this floating, the molten iron 3 is sufficiently stirred and steel making is accomplished. The finely pulverized limestone powder and the finely pulverized carbon powder of

10. 发明专利

JPS56142812A BOTTOM BLOWING TYPE REFINING METHOD FOR STEEL 失效
公开(公告)号：JPS56142812A
公开(公告)日：1981-11-07
申请号：JP4518780
申请日：1980-04-08
申请人： NIPPON STEEL CORP
发明人： KOBAYASHI ISAO , AKITA YASUHIRO , INOUE NORIO
IPC分类号： C21C5/34
摘要： PURPOSE:To relieve the burn-out of a tuyere part and enhance the activity rate of a furnace by injecting an alcohol as a cooling medium, when refining steel by bottom blowing method. CONSTITUTION:In the bottom blowing type steel refining, the alcohol such as methyl alcohol is injected as the cooling medium at an injection pressure of about 1.0kg/cm or higher. The amount of the alcohol injected is set to be not less than about 15wt% of the amount of oxygen gas blown in for refining. In this method, since the alcohol has a low decomposition temperature and an endothermic reaction (i.e., the decomposition of the alcohol) takes place soon after the injection of the alcohol, a cooling action is started early. Accordingly, the burn-out of the tuyere part is relieved and the production cost is reduced.

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