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11. 发明专利

JP2000239816A PLATING TANK 失效
公开(公告)号：JP2000239816A
公开(公告)日：2000-09-05
申请号：JP3643899
申请日：1999-02-15
申请人： NIPPON STEEL CORP , DAIKURE CO LTD
发明人： ICHIKAWA KAZUTOSHI , OKITA SHIGERU , MOTOMATSU RYUICHI , SUZUKI KIYOSHI
IPC分类号： B23K9/18 , B23K35/30 , B23K35/362 , C22C38/00 , C22C38/06 , C23C2/00 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a hot-dip galvanizing tank which can be manufactured by a low-cost welding method while maintaining required corrosion resistance and mechanical properties even in a weld zone. SOLUTION: A steel material having a composition consisting of by weight >0.15-0.3% C, =22 kJ/cm heat input by using the wire and the bond-type flux while regulating the number of weld layers for 25 mm of plate thickness to >=4 layers.

12. 发明专利

JPS62290813A METHOD FOR STARTING LOW FREQUENCY INDUCTION FURNACE 失效
公开(公告)号：JPS62290813A
公开(公告)日：1987-12-17
申请号：JP13110386
申请日：1986-06-07
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , TANIFUJI MINORU , SUZUKI KIYOSHI
IPC分类号： C21C1/08 , C21C5/52
摘要： PURPOSE:To reduce the quantity of energy required to melt a starting block by alternately charging plural pieces of starting material having a prescribed shape and a prescribed composition and plural sheets of plate-shaped material into a melting furnace, integrating the materials to be melted into a single body and supplying electric current to start the furnace. CONSTITUTION:Starting material to be melted such as plural pieces of pig iron 2 for a casting and plural sheets of plate-shaped material 3 are alternately charged into a low frequency induction furnace 1 to form a starting block 4. A power source is then switched on to supply electric current to the pig iron 2 by the electromagnetic induction action of a coil through the medium of the plate-shaped material 3. By the current supply, the pig iron 2 and the plate-shaped material 3 are melted and integrated.

13. 发明专利

JPS61227103A PRODUCTION OF IRON POWDER 失效
公开(公告)号：JPS61227103A
公开(公告)日：1986-10-09
申请号：JP6508685
申请日：1985-03-30
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , SUZUKI KIYOSHI
IPC分类号： B22F9/04
摘要： PURPOSE:To grind coarse-grained pig which is difficult to be ground at a low cost by crushing and deforming plastically the coarse-grained pig obtd. in the stage of treating a molten iron to a plate shape at an ordinary temp. to generate many cracks then pulverizing said pig. CONSTITUTION:The coarse-grained pig 4 separated from the kish graphite and slag generated in the stage of treating the molten iron or casting the pig is stored into a storage hopper 1. Such coarse-grained pig 4 is fed via a chute 2 and a gate 3 to vertical multi-stage rolls 5 which rotate at a low speed. The upper rolls 6, middle rolls 6 and lower rolls 6 of the rolls 5 are gradually narrowed in the spacings therebetween. The coarse-grained pig 4 is successively crushed and fed downstream via guides 7 and is formed to plate shape of about 1mm. Such pig is changed to the crushed material in which the many cracks are generated. Such crushed material is fed via a conveyor 8 having a magnetic separator to a storage hopper 9 from which the crushed material is supplied to a pulverizer 10 and is thereby pulverized.

14. 发明专利

JPS61223112A METHOD FOR ADJUSTING COMPONENT OF BLAST FURNACE MOLTEN IRON 失效
公开(公告)号：JPS61223112A
公开(公告)日：1986-10-03
申请号：JP6389785
申请日：1985-03-29
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , TANIFUJI MINORU , SUZUKI KIYOSHI
IPC分类号： C21B5/00 , C21B5/02
摘要： PURPOSE:To tap a target Si-content pig iron at a good yield of Si in fast response time by blowing Fe-Si for siliconization through a blow hole which is to be exclusively used and is provided in the specific position in the bottom of a blast furnace together with combustible gas, etc. into the molten iron in the bottom of the blast furnace in the stage of producing the high Si pig iron from the blast furnace. CONSTITUTION:The Fe-Si contg. 75% Si in a hopper 5 is blown into the molten iron by the combustible gas such as NPG or inert gas 6 from the tuyere 4 which is to be exclusively used for blowing of the Fe-Si and is provided between the tap hole 1 in the bottom of the blast furnace and an upper limit level 2 of the molten iron bath in the stage of producing the high Si pig iron for a casting in the blast furnace. The plural tuyeres provided behind the the tap hole 1 and at 60 deg. angle therewith are used for the tuyere 4. The Fe-Si enters the inside of the molten metal at a high yield without the oxidation of the Si therein to increase the content of the Si up to the target value. Since the Fe-Si is added to the molten iron, the Si in the molten iron is increased to the target value with the fast responsiveness. The coke ratio of the blast furnace is decreased as the heat is generated by the combustible gas. The productivity is improved as well.

15. 发明专利

JPS60174846A RAW MATERIAL PIG IRON FOR THICK-WALLED SPHEROIDAL GRAPHITE CAST IRON 失效
公开(公告)号：JPS60174846A
公开(公告)日：1985-09-09
申请号：JP2822984
申请日：1984-02-17
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , SUZUKI ATSUNOBU , SUZUKI KIYOSHI , TAKAHASHI HIROO
IPC分类号： C21C1/10 , C22C37/00 , C22C37/04
摘要： PURPOSE:To provide a titled pig iron which maintains the spheroidization rate with ordinary graphite spheroidization treatment and is free from deterioration in material quality by specifying C and Si in the pig iron to a prescribed content and controlling the total sum of Mn, P, S and other trace elements, O, N and gray cast iron rates and the blowholes in the gray cast iron part. CONSTITUTION:A titled pig iron is the pig iron contg. C and Si in a hypereutectic range and having the components contg., by weight, >=0.30% Si, =30% and the pig iron has no blowholes on the surface and the inside. If such pig iron is used, the graphite spheroidization rate is high and the high graphite spheroidization rate is maintained down to the central part, thus resulting in an increased average number of graphite particles. The abnormal number of graphite is hardly generated in the central part where the solidification is slowest.

16. 发明专利

JPS58187240A Horizontal and continuous casting method 失效
标题翻译：水平连续铸造方法
公开(公告)号：JPS58187240A
公开(公告)日：1983-11-01
申请号：JP6923682
申请日：1982-04-24
申请人： Nippon Steel Corp
发明人： SAKANO MAMORU , OKA ISAO , SUZUKI KIYOSHI , KIYOUJIMA YOSHIYUKI
IPC分类号： B22D11/04 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117
CPC分类号： B22D11/117
摘要： PURPOSE:To cast an ingot which is free from flaw, stain, etc. and has a good surface characteristic stably by bubbling an inert gas in the molten metal in a tundish near the inlet of a casting mold thereby forming ascending flow and performing horizontal and continuous casting. CONSTITUTION:A blow nozzle 13 penetrat through the bottom part 12 of a tundish 1 is connected through a regulator 15 and a conduit 14 to a bomb 16 for an inert gas such as Ar and the inert gas is bubbled from the nozzle 13 into the molten steel 4 near the inlet 5 of a horizontal casting mold 2 having a cooling box 3 provided in the lower part of the tundish 1 to form ascending flow in a horizontal and continuous casting installation which solidifies the molten metal 4 in the tundish 1 in the mold 2 and draws the same as an ingot. The temp. difference in the steel 4 is eliminated, the formation of the solidified shell near the inlet 5 of the casting mold is prevented and the ingot having a good surface characteristic is obtained. The nozzle 13 is located effectively in about L=
摘要翻译：目的：通过在铸模的入口附近的中间包中的熔融金属中冒出惰性气体，稳定地铸造不含缺陷，污渍等的良好的表面特性，从而形成上升流动并执行水平和连铸。构成：穿过中间包1的底部12的喷嘴13通过调节器15和导管14连接到用于诸如Ar的惰性气体的炸弹16，惰性气体从喷嘴13鼓泡成熔融的在具有设置在中间包1的下部的冷却箱3的水平铸造模具2的入口5附近的钢4，在水平连续铸造设备中形成上升流，其将模具中的中间包1中的熔融金属4固化 2并绘制与锭相同。温度钢4的差异被消除，防止在铸模的入口5附近形成凝固壳，并且获得具有良好表面特性的锭。喷嘴13有效地位于约L = <= 500mm ..

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