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1. 发明专利

JP2005264291A Bottom-blown tuyere for converter 审中-公开
标题翻译：用于转换器的底部显示器
公开(公告)号：JP2005264291A
公开(公告)日：2005-09-29
申请号：JP2004082422
申请日：2004-03-22
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： SHIROSAWA HIROYUKI , NABESHIMA SEIJI , AIDA KIMIHARU , TAKEUCHI HIDEJI
IPC分类号： C21C5/48 , C22C38/00 , C22C38/40 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a bottom-blown tuyere for converter with which since this tuyere has excellent workability and weldability, needless to say, and excellent high temperature oxidizing resistance, this tuyere has the effect to the improvement of the service life and as the other merit, this tuyere can be manufactured at comparatively low cost.
SOLUTION: In the concentric multi-tube structural bottom-blown tuyere for converter, jetting oxygen gas from a center-flowing path in the inner tube and cooling gas from an annular-flowing path in the outer tube, this tuyere is constituted of austenite stainless steel containing 20-26 mass% Cr and 10-25 mass% Ni.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种用于转换器的底吹风口，由于该风口具有优异的可加工性和可焊接性，不用说，并且具有优异的耐高温氧化性，该风口具有改善服务的效果生活和其他优点，这种风口可以以相对较低的成本制造。解决方案：在用于转换器的同心多管结构底吹风口中，从内管中的中心流动路径喷射氧气并从外管中的环形流动路径排出冷却气体，构成该风口的含有20-26质量％Cr和10-25质量％Ni的奥氏体不锈钢。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2005095968A Continuous casting method for steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2005095968A
公开(公告)日：2005-04-14
申请号：JP2003335773
申请日：2003-09-26
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： ITO YOICHI , MIKI YUJI , TAKEUCHI HIDEJI
IPC分类号： B22D11/115 , B22D11/124 , B22D11/22
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method, by which, when producing a cast slab consisting of equiaxed crystals while restraining growth of columnar crystals in continuous casting, the equiaxed crystals are stably generated even if operating conditions such as a casting speed or a molten-steel overheat temperature fluctuate.
SOLUTION: In the continuous casting method for steel, an electromagnetic stirring device is provided at a secondary cooling zone, which is a lower part of a mold, and continuous casting is conducted while electromagnetically stirring non-solidified molten steel. The electromagnetic stirring is conducted while cooling the surface layer part of a cast slab in a secondary cooling zone, which is an upper part of the electromagnetic stirring device, at a cooling speed of ≥ 5°C/sec.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种连续铸造方法，其中当制造由等轴晶体组成的铸造板坯同时抑制连续铸造中的柱状晶体的生长时，即使使用诸如铸造速度或钢水过热温度波动。解决方案：在钢的连续铸造方法中，在作为模具的下部的二次冷却区域设置电磁搅拌装置，并且在电磁搅拌非凝固钢水的同时进行连续铸造。在以5℃/秒的冷却速度冷却作为电磁搅拌装置的上部的二次冷却区的铸坯的表层部分的同时进行电磁搅拌。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004322120A Continuous casting method of steel 有权
公开(公告)号：JP2004322120A
公开(公告)日：2004-11-18
申请号：JP2003117340
申请日：2003-04-22
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MIKI YUJI , TAKEUCHI HIDEJI , YAMAUCHI AKIRA
IPC分类号： B22D11/115 , B22D11/11 , B22D27/02
摘要： PROBLEM TO BE SOLVED: To manufacture high quality metallic products by casting slabs having less surface defects and inner inclusions, in continuous casting without blowing inert gases from a nozzle for feeding molten steel to a casting mold.
SOLUTION: Three or more electromagnets (28) are arranged in the major side direction of a casting mold 10 and then, a magnetic field generated by adjacent coils 24 is essentially reversed. As a result, molten steel is actuated by a vibrating electromagnetic field in which a phase is essentially reversed. Also, a stationary magnetic field is superimposed in the thickness direction of the casting mold by a DC coil 34. Thus, in performing continuous casting while fluidity is locally excited, the maximum Lorentz's force driven by the magnetic field is made not less than 5,000 (N/m
3 ) and not more than 13,000 (N/m
3 ).
COPYRIGHT: (C)2005,JPO&NCIPI

4. 发明专利

JP2004314096A Continuous casting method for steel 有权
公开(公告)号：JP2004314096A
公开(公告)日：2004-11-11
申请号：JP2003108344
申请日：2003-04-11
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MIKI YUJI , TAKEUCHI HIDEJI
IPC分类号： B22D11/115 , B22D11/04 , B22D11/10 , B22D11/108 , B22D11/11 , B22D11/113 , B22D27/02
摘要： PROBLEM TO BE SOLVED: To enable the production of a metallic product of high quality by casting a slab reduced in surface defects and internal inclusions when performing continuous casting without blowing an inert gas from a nozzle feeding molten steel into a mold.
SOLUTION: In the continuous casting method for steel, three or more electromagnets (28) are arranged in the long side direction of a mold 10 fed with molten steel in which the melting point of inclusions is made low, and magnetic fields generated on adjoining coils 24 are substantially inverted, so that vibration electromagnetic fields in which phases are substantially inverted are acted on the molten steel to induce local fluidity by electromagnetic force.
COPYRIGHT: (C)2005,JPO&NCIPI

5. 发明专利

JP2004143492A Method of melting extra-low phosphorus stainless steel 有权
公开(公告)号：JP2004143492A
公开(公告)日：2004-05-20
申请号：JP2002307991
申请日：2002-10-23
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： KIKUCHI NAOKI , NABESHIMA SEIJI , TAKEUCHI HIDEJI , KASHIWA TAKAYUKI , KITANO YOSHIHISA
IPC分类号： C21C7/10 , C21C5/28
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a method of melting extra-low phosphorus stainless steel more inexpensive than the conventional one. SOLUTION: In the method of melting molten stainless steel, chromium ore and a carbonaceous material are added to hot metal charged to a converter type reaction vessel then, gaseous oxygen is fed thereto to subject the chromium ore to smelting reduction-refining; the obtained chromium-containing molten iron is subjected to decarburization refining in an another converter type reaction vessel to be made into chromium-containing molten steel; and the above steel is subjected to decarburization refining and/or componential regulation in a vacuum refining device. Before the decarburization of the chromium-containing molten iron, oxidizer-CaO based flux is added thereto, and dephosphorization is performed. An operation where, in accordance with the allowable amount of the phosphorus content in molten stainless steel as the object for a smelting reduction-refining charge on and after the next time, dephosphorization slag formed there is recycled to the smelting reduction-refining charge on and after the next time and an operation where a carbonaceous material is added to the dephosphorization slag, heating and vaporizing dephosphorization are performed, and it is recycled to the smelting reduction-refining charge on and after the next time are selectively recovered, and thus chromium oxide in the slug is subjected to carbon reduction, and the chromium component is recovered into the chromium-containing molten iron. COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2005139545A Molten iron dephosphorization method 审中-公开
标题翻译：钼铁脱磷方法
公开(公告)号：JP2005139545A
公开(公告)日：2005-06-02
申请号：JP2004062588
申请日：2004-03-05
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HINO YUTA , UCHIDA YUICHI , KISHIMOTO YASUO , TAKEUCHI HIDEJI , UENO TOMOYUKI , TOKUSHIGE JIROU
IPC分类号： C21C1/02
摘要： PROBLEM TO BE SOLVED: To provide a molten iron dephosphorization method capable of not only suppressing the drop of the temperature of the molten iron but also improving the dephosphorization oxygen efficiency in the preliminary treatment of the molten iron.
SOLUTION: In the molten iron dephosphorization method for blowing powder flux 2 containing a solid oxidizing agent into molten iron 3 held in a treatment vessel via an immersion lance 1 together with carrier gas, at least one lance 5 other than the immersion lance is immersed in the molten iron, the tip outlet of the latter lance is directed to a floating area 4 of flux and carrier gas blown from the former immersion lance, and oxygen-containing gas 6 is blown into the molten iron.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种铁水脱磷方法，其不仅可以抑制铁水的温度下降，而且可以提高铁水的预处理中的脱磷氧效率。解决方案：在将含有固体氧化剂的粉末焊剂2通过浸渍喷枪1与载体气体一起保持在处理容器中的铁水3中的熔融铁脱磷方法中，至少一个喷枪5以外的喷枪浸入铁水中，后喷枪的尖端出口被引导到从前浸入枪吹出的助焊剂和载气的浮动区域4，并将含氧气体6吹入铁水中。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004122215A Continuously cast slab for electric resistance welded tube, and production method for electric resistance welded tube 审中-公开
公开(公告)号：JP2004122215A
公开(公告)日：2004-04-22
申请号：JP2002293243
申请日：2002-10-07
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： ITOYAMA SEIJI , TAKEUCHI HIDEJI , KISHIMOTO YASUO , KAWABATA YOSHIKAZU , TOYOOKA TAKAAKI
IPC分类号： B22D11/00 , B21C37/08 , B22D11/04 , B22D11/124 , B22D11/128
摘要： PROBLEM TO BE SOLVED: To provide a production method for an electric resistance welded tube having a sound weld zone, and to provide a continuously cast steel making slab with which an electric resistance welded tube having a sound weld zone can be produced.
SOLUTION: A continuously cast steel making slab in which the central segregation zone at the inside is parted at intervals of ≥▵w defined by ▵w=HAZ+W(N-2)/N (wherein, W is a slab width (mm); HAZ is a heat affected width (mm) on electric resistance welding; and N is the number of strips in a hot rolled steel zone after slitting to a width direction) is hot-rolled into a hot rolled steel strip. The hot rolled steel strip is slitted to a width direction so as to be n-pieces of strips having a prescribed width. Thereafter, each strip as a steel tube stock is continuously formed, and is subjected to electric resistance welding into the electric resistance welded tube.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2004107715A Method for dephosphorizing molten iron 审中-公开
标题翻译：用于去磷化铁的方法
公开(公告)号：JP2004107715A
公开(公告)日：2004-04-08
申请号：JP2002270874
申请日：2002-09-18
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： FUJISAWA KOTARO , KIKUCHI NAOKI , NABESHIMA SEIJI , TAKEUCHI HIDEJI
IPC分类号： C21C1/02
摘要： PROBLEM TO BE SOLVED: To provide a method for dephosphorizing molten iron in which reaction efficiency of flux for refining is higher than that of the conventional method and dropping of molten iron temperature is little.
SOLUTION: The molten iron tapped from a blast furnace is held into a torpedo-car as it is or after performing desiliconizing treatment on a casting floor for blast furnace, and when this molten iron is dephosphorized by injecting the flux for refining with carrier gas through a lance, a solid oxidizing agent is contained in the flux for refining and also, an organic material composed essentially of C and H, is mixed at 2-10 mass% in 90-98 mass% of the flux for refining.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于精炼用助熔剂的反应效率高于常规方法和降低铁水温度的铁水脱磷方法。解决方案：将从高炉中抽出的铁水原样保存在鱼雷车内，或者在高炉的铸造地板上进行脱硅处理后，通过注入用于精炼的助熔剂脱磷，通过喷枪的载气，用于精炼的助熔剂中含有固体氧化剂，并且将基本上由C和H组成的有机材料以用于精炼的通量为90〜98质量％的2-10质量％混合。版权所有（C）2004，JPO

9. 发明专利

JP2004058092A Continuous casting method for steel 有权
公开(公告)号：JP2004058092A
公开(公告)日：2004-02-26
申请号：JP2002219246
申请日：2002-07-29
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MIKI YUJI , TAKEUCHI HIDEJI
IPC分类号： B22D11/11 , B22D11/04 , B22D11/115
摘要： PROBLEM TO BE SOLVED: To provide a technology for flow control inside a casting mold which assures a more effective flow control inside the casting mold, responding to the demand for a quality improvement technology for better slab surface in relation to recent increasing surface quality needs and also cost reduction demand.
SOLUTION: Electromagnets 31 attached with coils of 3 or more 1a to 12a, 1b to 12b are arranged along the long side direction of a casting mold for continuous casting 21. The peak position of oscillating magnetic field is moved along the long side direction of the mold 21, while the oscillating magnetic field is being emitted from the electromagnets. Furthermore, it is superposed by DC magnetic field emitted from DC coils 32.
COPYRIGHT: (C)2004,JPO

10. 发明专利

JP2007270357A Sus301 austenitic stainless steel for spring 有权
标题翻译： SUS301奥氏体不锈钢弹簧
公开(公告)号：JP2007270357A
公开(公告)日：2007-10-18
申请号：JP2007183885
申请日：2007-07-13
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： OKUYAMA GORO , TAKEUCHI HIDEJI , TANMACHI KENICHI
IPC分类号： C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide SUS301 austenitic stainless steel for a spring whose wire drawability and fatigue strength are both excellent. SOLUTION: The SUS301 austenitic stainless steel for a spring comprises Ca and REM by ≤0.0015 wt.% in total, and nonmetallic inclusions contained in the steel comprise CaO and REM oxide, and the total content of CaO-La 2 O 3 -Ce 2 O 3 in the nonmetallic inclusions is controlled to ≥10 wt.%. COPYRIGHT: (C)2008,JPO&INPIT

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