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1. 发明专利

JPS58224003A Hot rolling method of continuous casting ingot 失效
标题翻译：连续铸造的热轧方法
公开(公告)号：JPS58224003A
公开(公告)日：1983-12-26
申请号：JP10896782
申请日：1982-06-24
申请人： Nippon Steel Corp
发明人： OGAWA HIROYUKI , OOTA KUNITERU , KOGA SUMIAKI , OCHI KIYOSHI
IPC分类号： B21B1/00 , B21B1/46
CPC分类号： B21B1/463
摘要： PURPOSE:To perform direct rolling which suppresses the generation of hot cracking by controlling adequately the cooling speed of an ingot in the stage of continuous casting as well as the temp. for starting rolling in the stage of direct rolling and the time when said temp. is attained. CONSTITUTION:An ingot for a thick plate or the like produced by continuous casting is subjected, after the casting, to cooling at the average cooling rate Vc ( deg.C/min) from 1,500 deg.C near the surface of the ingot up to 1,300 deg.C satisfying the conditions expressed by a functional equation I with a constant K (where, x: content of C, y: content of O). The ingot is further subjected to hot rolling for the lapse of time tmin since solidification until the rolling is started and at the surface temp. of the ingot in the stage of starting rolling satisfying the conditions of the relation II. Since the rolling free from hot cracking is accomplished with the effective utilization of the heat after the casting by the above-mentioned control for temp. conditions, the cost of energy is reduced.
摘要翻译：目的：进行直接轧制，通过充分控制连续铸造阶段的锭的冷却速度以及温度来抑制热裂纹的产生。在直接滚动的阶段开始滚动和所述温度的时间。达到了构成：通过连续铸造制造的用于厚板等的铸锭在铸造之后以平均冷却速率Vc（℃/ min）从锭的表面附近的1,500℃冷却至 1300℃，满足由常数K（其中，x：C，y：O含量）的函数式I表示的条件。从固化直到轧制开始并在表面温度下，该锭进一步经受热轧经过时间tmin。的锭子在开始轧制阶段满足关系II的条件。由于通过上述温度控制可以有效利用铸造后的热量来实现无热裂纹的轧制。条件下，能源成本降低。

2. 发明专利

JPS591627A Method for preventing hot crack of continuous casting billet 失效
标题翻译：防止连续铸造坯料热裂纹的方法
公开(公告)号：JPS591627A
公开(公告)日：1984-01-07
申请号：JP10896682
申请日：1982-06-24
申请人： Nippon Steel Corp
发明人： OGAWA HIROYUKI , OOTA KUNITERU , KOGA SUMIAKI , OCHI KIYOSHI
IPC分类号： B22D11/12 , B21B3/00 , B22D11/128 , C21D7/13 , C21D8/00 , C22C38/00
CPC分类号： C21D7/13
摘要： PURPOSE:To prevent hot crack and to reduce the energy cost by subjecting a continuously cast slab of a carbon steel or a special steel contg. regulated amounts of C, S and O as well as other common components to working accompanied by plastic deformation without carrying out cooling. CONSTITUTION:A carbon steel or a special steel contg., by weight,
摘要翻译：目的：通过对连续铸造的碳钢或特殊钢板坯进行处理，防止热裂纹和降低能源成本。调节量的C，S和O以及其他常见组分，以便在不进行冷却的情况下伴随塑性变形。构成：碳钢或特殊钢，按重量计，<= 1.0％C，<= 0.028％S和<= 0.018％O以及其他常见组分，同时满足方程式I，II [其中x为量（％），y为O的量（％），z为S的量（％）]连续铸造。所得到的铸造板坯在不进行冷却的同时进行塑性变形。通过该方法，特别是在直接轧制的情况下可以防止热裂纹。

3. 发明专利

JPS63266014A OXYGEN TOP/BOTTOM BLOWING STEEL MAKING METHOD 失效
公开(公告)号：JPS63266014A
公开(公告)日：1988-11-02
申请号：JP7276888
申请日：1988-03-26
申请人： NIPPON STEEL CORP
发明人： KOGA SUMIAKI , KIMURA KATSUICHI , NISHIMURA MITSUHIKO , KYOJIMA YOSHIYUKI
IPC分类号： C21C5/35 , C21C5/30
摘要： PURPOSE:To execute slag-less decarbonization at high decarbonizing and temp. rising rates by executing oxygen top/bottom blowing steel making to molten iron as a main iron source, to which desiliconizing, dephosphorizing and desulfurizing treatments are beforehand executed, by oxygen bottom blowing as a main decarbonized refining means. CONSTITUTION:In an oxygen top/bottom blowing steel making furnace, lining refractory 2 on an iron shell 1 and arranging the bottom blowing tuyeres 3 for blowing oxygen and a top blowing lance 4, the desiliconizing, dephosphorizing and desulfurizing treated molten iron 5 is used as the main iron source and further the iron scrap, etc., is added to execute decarbonized steel making. In the above oxygen top/bottom blowing steel making method, while stirring the molten iron 5 by oxygen bottom blowing from the bottom blowing tuyere 3, mainly decarbonizing treatment is executed. Further, by oxygen top blowing through the lance 4, mainly secondary combustion of carbon is promoted to achieve high decarbonizing and temp. rising rates. Then, depth of dent 6 formed on the molten iron 5 surface by the top blowing is adjusted as an index of the top oxygen blowing intensity. By this method, the decarbonizing and temp. rising rates are controlled and blending ratio of iron scrap is improved.

4. 发明专利

JPS6223047B2 失效
公开(公告)号：JPS6223047B2
公开(公告)日：1987-05-21
申请号：JP9087884
申请日：1984-05-09
申请人： NIPPON STEEL CORP
发明人： KIMURA KATSUICHI , KOGA SUMIAKI , NISHIMURA MITSUHIKO , KYOJIMA YOSHUKI
IPC分类号： C21C5/30 , C21C5/32 , C21C5/34 , C21C5/35

5. 发明专利

JPS60169510A STEEL MAKING METHOD INVOLVING ADDITION OF CARBONIZING AGENT 失效
公开(公告)号：JPS60169510A
公开(公告)日：1985-09-03
申请号：JP2518284
申请日：1984-02-15
申请人： NIPPON STEEL CORP
发明人： SAKURADA MORIKATSU , NISHIMURA MITSUHIKO , KOGA SUMIAKI , KOJIMA MASAMICHI
IPC分类号： C21C7/04 , C21C1/00 , C21C5/00 , C21C5/30 , C21C5/32
摘要： PURPOSE:To refine easily a molten iron subjected to preliminary refining including desiliconization, desulfurization and dephosphorization to a high-carbon steel, etc. in the stage of decarburizing and refining said iron to a molten steel in an oxygen top blown converter, etc. by adding a carbonizing material to the molten iron in order to make up the deficient heat source and regulating the depth of the depression on the surface of the molten iron bath formed by top blowing oxygen to a specific depth. CONSTITUTION:A molten iron from a blast furnace is subjected to preliminary refining including desiliconization, desulfurization and dephosphorization then to decarburization refining by a slagless method in a top blown converter. If the product is a high-carbon steel or alloy steel, etc. the calorific value is not enough with oxidation of C in the molten iron and the heat is deficient in the stage of smelting of the molten steel in the case of adding a cold material such as ferroalloy as a raw material for the alloy steel. A carbonizing agent such as coke is therefore added to the molten iron to make up the deficient quantity of heat with the oxidation of C and the depth of the depression on the surface of the molten iron formed by the oxygen blown from a top blowing lance is adjusted to 80-400mm.. The increase in the amt. of the cold material such as ferroalloy, scrap to be used is made possible and the refining of the high- carbon steel and alloy steel is made possible.

6. 发明专利

JPS5155726A BISAISOSHIKI OJUSURU KINZOKUNO RENZOKUCHUZOHO 失效
公开(公告)号：JPS5155726A
公开(公告)日：1976-05-17
申请号：JP12956574
申请日：1974-11-12
申请人： NIPPON STEEL CORP
发明人： ITO SACHOSHI , OKAJIMA TADAHARU , KOGA SUMIAKI
IPC分类号： C21C7/00 , B22D11/00 , B22D11/10 , B22D11/112 , B22D11/114 , B22D11/116 , C21C7/10

7. 发明专利

JPS63269411A CERAMIC SUPERCONDUCTIVE FILAMENT 失效
公开(公告)号：JPS63269411A
公开(公告)日：1988-11-07
申请号：JP10183887
申请日：1987-04-27
申请人： NIPPON STEEL CORP
发明人： KOGA SUMIAKI , MATSUDA SHOICHI , MURAKAMI MASAHITO
IPC分类号： B28B1/00 , H01B12/04
摘要： PURPOSE:To keep the superconductive characteristic after the plastic process and heat treatment process by constituting a superconductive filament with a center section made of a ceramic superconductive material with a practically rectangular cross section shape and one or more coating layers stuck to the center section on each outside of a pair of mating rectangular sides. CONSTITUTION:This superconductive filament is constituted of a center section made of a ceramic superconductive material with a practically rectangular cross section shape and one or more coating layers stuck to the center section on each outside of a pair of mating rectangular sides. Each side of other pair of mating rectangular sides is not coated, and the whole cross section shape is practically a rectangle. The outside of the center section (core wire) made of a superconductive material is coated with one or more layers, and a material hardly reacted with the oxygen in the ceramic constituting the center section is used for the innermost coating layer. Sufficiently good superconductivity is thereby secured in the final filament.

8. 发明专利

JPS60234913A ALTERNATE STRONG AND WEAK OXYGEN BLOWING STEEL MAKING PROCESS 失效
公开(公告)号：JPS60234913A
公开(公告)日：1985-11-21
申请号：JP9087984
申请日：1984-05-09
申请人： NIPPON STEEL CORP
发明人： KOGA SUMIAKI , NISHIMURA MITSUHIKO , OCHI KIYOSHI , BABA KENICHI
IPC分类号： C21C5/30 , C21C5/32 , C21C5/35
摘要： PURPOSE:To increase the temp. of molten iron by decarbonization and to increase the blending ratio of scrap iron in a steel making material by using molten iron which is previously desiliconized, dephosphorized, and desulfurized as an essential iron source, and repeating alternate strong and weak top blowing of oxygen against the surface of molten iron to make steel. CONSTITUTION:An agitating bottom gas blowing tuyere 4 is optionally provided to a vessel obtained by lining an iron shell 1 with a refractory material 2, and an oxygen blowing lance 3 is provided to a top-blown oxygen steel making furnace. Molten iron 5 which is previously desiliconized, dephosphorized, and desulfurized is charged into said furnace as an essential iron source, and oxygen is blown in from the top as an essential decarbonization means to make steel. The depth of a dent 6 formed on the surface of molten iron by the top blowing of oxygen is made alternately large and small, and the alternate strong and weak blowing of oxygen is continuously repeated. The secondary combustion of carbon is promoted in this way, and the temp. of molten iron is increased by decarbonization. Consequently, the blending ratio of scrap iron in the steel making material is increased, and the degree of freedom in selecting the kind of iron sources can be expanded.

9. 发明专利

JPS60234912A TOP AND BOTTOM-BLOWN OXYGEN STEEL MAKING PROCESS 失效
公开(公告)号：JPS60234912A
公开(公告)日：1985-11-21
申请号：JP9087884
申请日：1984-05-09
申请人： NIPPON STEEL CORP
发明人： KIMURA KATSUICHI , KOGA SUMIAKI , NISHIMURA MITSUHIKO , KIYOUJIMA YOSHIYUKI
IPC分类号： C21C5/30 , C21C5/32 , C21C5/34 , C21C5/35
摘要： PURPOSE:To increase the temp. of molten iron by decarbonization and to increase the blending ratio of scrap iron by using molten iron which is previously desiliconized, dephosphorized, and desulfurized as an iron source, using essentially bottom blowing of oxygen, and forming a dent in an appropriate depth on the surface of molten iron by top blowing of oxygen in steel making. CONSTITUTION:A bottom blowing oxygen tuyere 3 is provided to a vessel obtained by lining an iron shell 1 with a refractory material 2, and a top blowing oxygen lance 4 is provided to a top and bottom-blown oxygen steel making furnace. Molten pig 5 which is previously desiliconized, dephosphorized, and desulfurized is used as an essential iron source, and the decarbonization is carried out essentially by bottom blowing of oxygen in the top and bottom-blown steel making process. In said steel making process, the flow rate of the top-blown oxygen is regulated to

10. 发明专利

JPS60169509A SLAGLESS DECARBURIZATION BLOWING METHOD 失效
公开(公告)号：JPS60169509A
公开(公告)日：1985-09-03
申请号：JP2518184
申请日：1984-02-15
申请人： NIPPON STEEL CORP
发明人： NISHIMURA MITSUHIKO , KOGA SUMIAKI , SAKURADA MORIKATSU , KOJIMA MASAMICHI
IPC分类号： C21C5/30 , C21C5/32 , C21C5/34 , C21C5/35
摘要： PURPOSE:To reduce spitting and dust loss in the stage of refining a molten iron subjected to preliminary refining including desiliconization, desulfurization and dephosphorization to a steel in a converter by regulating the volumetric ratio between a bottom blowing gas and top blowing oxygen according to the depression of the molten steel surface by oxygen pressure. CONSTITUTION:A molten iron from a convertr is preliminarily desiliconized, desulfurized and dephosphorized and is then subjected to slagless oxygen blowing in a top blown converter provided with bottom blowing tuyeres by which a steel is produced. The volumetric ratio between a bottom blowing gas and top blowing oxygen (bottom blowing/top blowing ratio) is regulated according to the depth of the depression formed on the surface of the molten metal by the top blowing oxygen. More specifically, the value of the above-mentioned bottom blowing/top blowing ratio is made >=4%, >=3% and >=2% when the depth L of the depression is =140mm. by which the loss of the molten steel in the form of spitting or fume dust and the consequent decrease in the yield of Fe are prevented.

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