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11. 发明专利

JP2013527318A Ultra-low carbon, aluminum of extremely low Ti, control method of a silicon-killed steel 有权
公开(公告)号：JP2013527318A
公开(公告)日：2013-06-27
申请号：JP2013506465
申请日：2011-04-12
申请人：宝山鋼鉄股▲分▼有限公司
发明人：峰張 , 暁陳 , 簡如朱
IPC分类号： C21C7/00 , C21C7/04 , C21C7/06 , C21C7/064 , C21C7/068 , C21C7/076 , C22C38/00 , C22C38/14
CPC分类号： C22C38/04 , C21B13/02 , C21C7/06 , C21C7/0645 , C21C7/076 , C22C33/04 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/06 , C22C38/12 , C22C38/14 , Y02P10/242
摘要：本発明は、化学成分の重量比が、C≦0.005%、Si：0.1〜3.4%、Mn：0.1〜0.5%、P≦0.2%、S≦0.002%、Al：0〜1.2%、N≦0.005%，Ti≦0.0015、残部がFeと不可避的不純物であり、この化学成分を有する溶鋼を溶鉄予備処理、製錬、RH精錬し、鋳込み、成形処理して得られる超低炭素のアルミニウム，シリコンキルド鋼中のTiを極めて低く制御する方法であり、
RH精錬で脱炭が終わるとき、取鍋スラグの成分であるT.(トータル)Feの含有量が≧5％およびAl
2 O
3 の含有量が≦23%になるように、取鍋スラグに0.6〜1.7kg/t鋼(鋼1t当たり)のカルシウム・アルミニウム系改質剤を加える改質処理を行い、RH精錬で脱炭が終わるとき、シリコン鉄、アルミニウム鉄またはマンガン鉄により脱酸し、合金化し、脱硫率が50％〜75％になるように深度脱硫を行なう超低炭素のアルミニウム，シリコンキルド鋼中のTiを極めて低く制御する方法を提供する。

13. 发明专利

JP2012251194A Stainless steel and method for producing the same 有权
标题翻译：不锈钢及其制造方法
公开(公告)号：JP2012251194A
公开(公告)日：2012-12-20
申请号：JP2011123949
申请日：2011-06-02
申请人： Nippon Yakin Kogyo Co Ltd , 日本冶金工業株式会社
发明人： MIYUKI MASANORI , O KON , TODOROKI HIDEKAZU
IPC分类号： C22C38/00 , B21B3/02 , B22D11/00 , B22D11/124 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/068 , C21D6/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide stainless steel that enhances strength while maintaining excellent corrosion resistance and hot workability and that also is producible with an inexpensive raw material cost.SOLUTION: The stainless steel contains 0.02-0.08 mass% of C, 0.2-1.0 mass% of Si, 1.2-2.0 mass% of Mn, 0.03 mass% or less of P, 0.005 mass% or less of S, 13-15 mass% of Ni, 22-30 mass% of Cr, and 0.07-0.20 mass% of N, with the balance comprising Fe and unavoidable impurities, and satisfies the following expression 1 and expression 2.
摘要翻译：要解决的问题：提供不锈钢，其提高强度，同时保持优异的耐腐蚀性和热加工性，并且也可以以廉价的原料成本生产。解决方案：不锈钢含有C：0.02-0.08质量％，Si：0.2〜1.0质量％，Mn：1.2〜2.0质量％，P：0.03质量％以下，S：0.005质量％以下 Ni的15质量％，Cr为22〜30质量％，N为0.07〜0.20质量％，余量由Fe和不可避免的杂质构成，满足下述式（1）和式（2）。）2013，JPO＆INPIT

14. 发明专利

JP5071027B2 Ultra-low carbon steel plate, a method of refining ultra-low carbon steel, and a method for manufacturing of ultra-low carbon steel plate 有权
公开(公告)号：JP5071027B2
公开(公告)日：2012-11-14
申请号：JP2007263481
申请日：2007-10-09
申请人：住友金属工業株式会社
发明人：誠治古橋 , 純芳賀 , 隆之西
IPC分类号： C22C38/00 , C21C7/04 , C21C7/06 , C21C7/068 , C21C7/10 , C22C38/14 , C22C38/58

15. 发明专利

JP5061535B2 Molten steel method of refining in Rh vacuum degasser 有权
公开(公告)号：JP5061535B2
公开(公告)日：2012-10-31
申请号：JP2006235253
申请日：2006-08-31
申请人： Jfeスチール株式会社
发明人：善幸中村 , 久樹加藤 , 治志奥田
IPC分类号： C21C7/10 , C21C7/068

16. 发明专利

JP2012172197A Method for modifying hot metal desulfurization slag 有权
标题翻译：修改热金属脱硫渣的方法
公开(公告)号：JP2012172197A
公开(公告)日：2012-09-10
申请号：JP2011035389
申请日：2011-02-22
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： YAMAGUCHI KIMIHARU
IPC分类号： C21C7/064 , C04B5/00 , C21C1/02 , C21C7/068 , C22B1/02
摘要： PROBLEM TO BE SOLVED: To provide an effective method for processing a modified slag, which is recyclable as a refining flux etc., from a hot metal desulfurization slag at a low cost in a large scale while suppressing emission of environmental pollutants.SOLUTION: The method for modifying the hot metal desulfurization slag so that it can be reused as various refining materials includes: loading the hot metal desulfurization slag into a reaction tank where a combustion gas is used as a reactive gas; and roasting the same, thereby processing the hot metal desulfurization slag into the recyclable modified slag.
摘要翻译：待解决的问题：为了在抑制环境污染物的排放的同时以较低的成本从铁水脱硫渣提供作为精炼助熔剂等可回收的改性渣的处理的有效方法。解决方案：将铁水脱硫渣改造成可以作为各种精炼材料再利用的方法，包括：将铁水脱硫渣装入反应釜中，在其中使用燃烧气体作为反应气体; 并焙烧，从而将铁水脱硫渣加工成可回收的改性渣。版权所有（C）2012，JPO＆INPIT

17. 发明专利

JP2012077354A Method for melting/preparing low carbon aluminum killed steel excellent in cleanliness 有权
标题翻译：稀释/制备低碳低密度烧结钢在清洁中的方法
公开(公告)号：JP2012077354A
公开(公告)日：2012-04-19
申请号：JP2010223475
申请日：2010-10-01
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： NAKATANI KENJI , FUJITA HIROKI , NISHIGORI MASANORI
IPC分类号： C21C7/10 , C21C7/04 , C21C7/06 , C21C7/068
摘要： PROBLEM TO BE SOLVED: To stably melt/prepare a low carbon aluminum killed steel having a high cleanliness of extremely few oxide-based inclusion by combining a primary refining using a converter with a secondary refining using an RH vacuum degassing apparatus.SOLUTION: There is provided a method for melting/preparing the low carbon aluminum killed steel containing 0.02-0.06 mass% carbon. In the method, molten steel produced by the converter is tapped into a ladle from the converter while the molten steel is not deoxidized yet, and after tapping the molten steel, a slag modifier containing Al is added onto the slag in the ladle present on the un-deoxidized molten steel at an addition quantity of ≥0.3 kg/t of molten steel per pure Al content and a low grade oxide in the slag is reduced with added Al, then, in the RH vacuum degassing apparatus, dissolved oxygen in the molten steel and the carbon in the molten steel are reacted with each other under reduced pressure without newly supplying the oxygen source into the molten steel to perform decarburization treatment, the decarburization treatment is ended when decarburized quantity of ≥0.015 mass% is secured and the carbon concentration in the molten steel becomes 0.02-0.06 mass%, after that. the molten steel is deoxidized by adding Al to the molten steel under reduced pressure condition.
摘要翻译：待解决的问题：通过将使用转化器的一次精炼与使用RH真空脱气装置的二次精炼相结合，稳定地熔融/制备具有极少氧化物基夹杂物的高清洁度的低碳铝杀死的钢。解决方案：提供一种熔融/制备含有0.02-0.06质量％碳的低碳铝杀死钢的方法。在该方法中，由转炉产生的钢水从转炉中钢水浸入钢水中，而钢水未脱氧，在钢水开采后，将含有Al的炉渣改性剂加入到钢桶中的炉渣上添加Al时，每纯Al含量和低品位氧化物添加量为≥0.3kg/ t的未脱氧钢水随着Al的减少而减少，然后在RH真空脱气装置中，熔融的钢和钢水中的碳在减压下相互反应，而不用再将氧源供给到钢水中进行脱碳处理，脱碳处理结束时脱碳量≥0.015质量％，碳浓度在钢水中变成0.02-0.06质量％。通过在减压条件下向钢水中添加Al来使钢水脱氧。版权所有（C）2012，JPO＆INPIT

19. 发明专利

JP2011214125A Method for decarburizing chromium-containing steel by blowing oxygen 有权
标题翻译：通过吹氧来脱色含铬钢的方法
公开(公告)号：JP2011214125A
公开(公告)日：2011-10-27
申请号：JP2010086092
申请日：2010-04-02
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ASAHARA AKIFUMI , KATO KATSUHIKO
IPC分类号： C21C7/068 , C21C1/02 , C21C5/52 , C22C38/00 , C22C38/18
CPC分类号： Y02P10/216
摘要： PROBLEM TO BE SOLVED: To provide a method for decarburizing chromium-containing steel by blowing oxygen which allows the use of inexpensive general-purpose Fe-Cr alloy as a chromium source in producing a low-sulfur chromium-containing steel required to contain about ≤0.013 mass% of S at the starting point of decarburization by blowing oxygen.SOLUTION: The method includes: producing a chromium-containing molten steel containing 2 to 8 mass% of C and 10 mass% or more of Cr in an electric furnace; preparing a low-chromium molten steel containing 4 mass% or less of Cr; mixing X (ton) of the chromium-containing molten steel with the low-chromium molten steel to obtain Y (ton) of a mixed molten steel containing 8 to 26 mass% of Cr, so as to satisfy the relation: 0.52≤X/Y≤0.80; and decarburizing the mixed molten steel by blowing oxygen in a refining vessel. Thereby, the chromium-containing molten steel is subjected to light desulfurization when produced in an electric furnace; the low-chromium molten steel is subjected to heavy desulfurization; and when both are mixed, a targeted low-S molten steel can be obtained even if general-purpose Fe-Cr alloy having a high S content is used.
摘要翻译：要解决的问题：提供一种通过吹氧来对含铬钢进行脱碳的方法，其允许使用便宜的通用Fe-Cr合金作为铬源来生产低硫含铬钢，其含有约≤ 通过吹入氧气在脱碳起始点为0.013质量％的S。解决方案：该方法包括：在电炉中生产含有2〜8质量％的C和10质量％以上的Cr的含铬钢水; 制备含有4质量％以下的Cr的低铬钢水; 将含铬钢水的X（吨）与低铬钢水混合，得到含有8〜26质量％Cr的混合钢水的Y（ton），以满足关系：0.52≤X/ Y≤0.80; 并通过在精炼容器中吹氧来对混合的钢水进行脱碳。由此，在电炉中制造时，使含铬钢水进行轻度脱硫; 低铬钢水经重硫脱硫; 并且当两者混合时，即使使用具有高S含量的通用Fe-Cr合金，也可以获得目标低S钢水。

20. 发明专利

JP2011153337A Method for continuously controlling vacuum degree 有权
标题翻译：连续控制真空度的方法
公开(公告)号：JP2011153337A
公开(公告)日：2011-08-11
申请号：JP2010014380
申请日：2010-01-26
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KAWAUCHI DAISUKE , SUGANO KOJI , KATO KATSUHIKO
IPC分类号： C21C7/10 , C21C7/00 , C21C7/068
摘要： PROBLEM TO BE SOLVED: To provide a method for continuously controlling a vacuum degree, in which molten steel is stably subjected to decarburization while restraining spattering of molten metal and dust and restraining oxidized loss of Cr. SOLUTION: In the method for controlling the vacuum degree of a treating vessel 2 in reduced-pressure decarburization refining of a Cr-containing molten steel 4, when CO volume-concentration in exhaust gas with the oxygen-blowing decarburization is reached to 20%, this timing is as the decarburization-starting time, and the vacuum degree at the decarburization-starting time, is set in the range of 100-300 torr and the vacuum degree is adjusted so that the maximum value of a reduced pressure changing pressure for optionally 1 min during the oxygen-blowing decarburization becomes ≤30 torr/min. Further, after decarburization-starting time, until the C mass-concentration [%C] in the molten steel 4 reaches to the C mass-concentration [%C 0 ] at the decarburization-balancing time, the reducing pressure in the treating vessel 2 is gradually progressed in the range of 0-0.8 torr/min the average reducing pressure speed. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种连续控制真空度的方法，其中钢水稳定地进行脱碳，同时抑制熔融金属和粉尘的飞溅并抑制氧化的Cr的损失。解决方案：在含Cr钢水4的减压脱碳精炼中控制处理容器2的真空度的方法中，当氧气脱碳的排气中的CO体积浓度达到 20％时，作为脱碳开始时间，将脱碳开始时刻的真空度设定在100-300乇的范围内，调节真空度，使得减压的最大值变化在吹氧脱碳期间任选1分钟的压力变为≤30托/分钟。此外，在脱碳开始时间之后，在脱碳平衡时间直到钢水中的C质量浓度[％C]达到C质量浓度[％C 0 ]时，处理容器2中的减压逐渐进行在平均减压速度0-0.8托/分钟的范围内。版权所有（C）2011，JPO＆INPIT

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