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41. 发明专利

JP3922181B2 Melting method of the high clean steel 有权
公开(公告)号：JP3922181B2
公开(公告)日：2007-05-30
申请号：JP2002379232
申请日：2002-12-27
申请人： Jfeスチール株式会社
发明人：睦多田 , 啓造田岡 , 圭司門田 , 守須田
IPC分类号： C21C7/064 , C21C7/00 , C21C7/04 , C21C7/068 , C21C7/076 , C21C7/10
CPC分类号： Y02P10/242

42. 发明专利

JP3914611B2 Decarburization refining method of stainless molten steel 失效
公开(公告)号：JP3914611B2
公开(公告)日：2007-05-16
申请号：JP20233497
申请日：1997-07-11
申请人：新日本製鐵株式会社
发明人：勝彦加藤 , 健一郎宮本 , 昭男新飼 , 浩至菅野
IPC分类号： C21C7/10 , B65G47/52 , C21C7/00 , C21C7/068

43. 发明专利

JP3893770B2 Smelting method of high-clean ultra-low carbon steel 有权
公开(公告)号：JP3893770B2
公开(公告)日：2007-03-14
申请号：JP28487698
申请日：1998-10-07
申请人： Jfeスチール株式会社
发明人：廣久中島 , 晶亀水 , 喜美小松 , 秀栄田中
IPC分类号： C21C7/00 , C21C7/068 , C21C7/076 , C21C7/10
CPC分类号： Y02P10/242

44. 发明专利

JP2006233264A Method for smelting high-chromium molten steel 有权
标题翻译：冶炼高铬钢的方法
公开(公告)号：JP2006233264A
公开(公告)日：2006-09-07
申请号：JP2005048484
申请日：2005-02-24
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： NABESHIMA YUKI , OGAWA HISASHI
IPC分类号： C21C7/00 , C21C1/02 , C21C7/068 , C21C7/10
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a smelting method capable of efficiently smelting high-chromium molten steel, and matching with a continuous casting process as well even when employing molten high-carbon high-chromium ferro-alloys having various compositions. SOLUTION: This smelting method comprises the steps of: tapping after temporarily holding a molten high-carbon high-chromium ferro-alloy 13 in a holding furnace 5 having a heating function for the molten metal; desulfurising in a desulfurization facility 6 outside the furnace; and decarburization-refining in a decarburization smelting furnace 7 into the high-chromium molten steel 14. The above molten high-carbon high-chromium ferro-alloy is preferably a mixture of one or more metals produced by any method of melting/reducing chromium oxide, melting high-chromium steel scrap and melting ferrochromium; or a mixture of the mixture of the above one or more metals and molten iron tapped from a blast furnace. The desulfurisation treatment outside the furnace is conducted preferably with the use of a flux containing a magnesium-metal-based desulfurizing agent and a CaO-based desulfurizing agent. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：待解决的问题：提供一种能够有效地熔炼高铬钢水的冶炼方法，并且即使在使用具有各种组成的熔融高碳高铬铁合金的情况下也能够连续铸造工艺。解决方案：该熔炼方法包括以下步骤：在熔融的高碳高铬铁合金13中暂时保持熔融金属具有加热功能的保持炉5中进行攻丝; 在炉外的脱硫设备6中脱硫; 并且在脱碳冶炼炉7中对高铬钢水14进行脱碳精炼。上述熔融高碳高铬铁合金优选为通过任意熔化/还原氧化铬的方法制造的一种或多种金属的混合物，熔化高铬钢废料并熔化铬铁; 或上述一种或多种金属的混合物和从高炉敲击的铁水的混合物。炉外的脱硫处理优选使用含有金属基脱硫剂和CaO系脱硫剂的助熔剂进行。版权所有（C）2006，JPO＆NCIPI

45. 发明专利

JP2006225736A METHOD FOR PRODUCING EXTRA-LOW-CARBON STEEL 审中-公开
公开(公告)号：JP2006225736A
公开(公告)日：2006-08-31
申请号：JP2005042575
申请日：2005-02-18
申请人： NIPPON STEEL CORP
发明人： SASAI KATSUHIRO , MATSUZAWA TAMAHIRO
IPC分类号： C21C7/068 , B22D1/00 , B22D11/00 , C21C7/00 , C21C7/04 , C21C7/06 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an extra-low-carbon steel by which the surface flaw can surely be restrained by minimizing the production quantity of alumina-inclusion in molten steel without increasing production cost. SOLUTION: This method for producing the extra-low-carbon steel is characterized in that in a decarburize-treatment of the extra-low-carbon molten steel by using a vacuum-degassing apparatus, when the carbon concentration reaches to 0.005-0.01 mass%, a pre-deoxidation is performed by adding Al into the molten steel, and decarburization is performed to 0.004 mass% carbon concentration while controlling the dissolved oxygen concentration to 0.025-0.04 mass%, afterthen Al is further added into the molten steel, then the molten steel subjected to the Al deoxidation is cast. COPYRIGHT: (C)2006,JPO&NCIPI

46. 发明专利

JP3785257B2 Degassing refining method of stainless steel 失效
公开(公告)号：JP3785257B2
公开(公告)日：2006-06-14
申请号：JP22064097
申请日：1997-07-31
申请人：新日本製鐵株式会社
发明人：勝彦加藤 , 健一郎宮本 , 昭男新飼 , 浩至菅野
IPC分类号： C21C7/00 , C21C7/10 , C21C7/06 , C21C7/068

47. 发明专利

JP2006104531A Ti-CONTAINING STAINLESS STEEL MANUFACTURING METHOD 有权
标题翻译：含Ti不锈钢制造方法
公开(公告)号：JP2006104531A
公开(公告)日：2006-04-20
申请号：JP2004293948
申请日：2004-10-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FUJIWARA MICHITAKE
IPC分类号： C21C7/04 , B22D1/00 , B22D11/00 , B22D11/11 , C21C7/00 , C21C7/068 , C21C7/072 , C21C7/10 , C22C38/00 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To provide a Ti-containing stainless steel manufacturing method by which nozzle clogging and surface defects caused by powder inclusion are effectively prevented without increasing the cost of a reducing agent.
SOLUTION: When melting Cr-containing steel having the composition consisting of, by mass, 0.01-0.8% Ti, 0.1-1.0% Si and ≤20 ppm S, denitrification and decarburization are performed under the vacuum or under the atmospheric pressure so as to reduce the content of N to ≤150 ppm, then slag basicity (CaO/(SiO
2 +Al
2 O
3 )) after the reduction is controlled to be ≥1.8 by the reduction using Si. Thereafter, Al is added so that the content of Al is ≥0.02%, Ti of the predetermined amount is charged, and CaSi is charged in a ladle before pouring and/or in a tundish during pouring to perform the continuous casting. Nozzle clogging can be prevented, and excellent surface quality can be obtained thereby.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种含Ti不锈钢制造方法，通过该方法可有效地防止喷嘴堵塞和由粉末夹杂物引起的表面缺陷，而不增加还原剂的成本。解决方案：当熔化组合物质量为0.01-0.8％Ti，0.1-1.0％Si和≤20ppmS的组成的含Cr钢时，在真空或大气压下进行脱氮和脱碳为了将N的含量降低至≤150ppm，则渣的碱度（CaO /（SiO 2 + Al 2 3 ））通过使用Si的还原将还原控制为≥1.8。然后，添加Al，使Al的含量≥0.02％，在规定量的Ti中加入Ti，在浇注前和/或浇注中的中间包中将CaSi加入钢包中，进行连续铸造。可以防止喷嘴堵塞，从而可以得到优异的表面质量。版权所有（C）2006，JPO＆NCIPI

48. 发明专利

JP3760144B2 Ultra-low carbon steel plate, ultra-low carbon steel slab and manufacturing method thereof 有权
公开(公告)号：JP3760144B2
公开(公告)日：2006-03-29
申请号：JP2002228358
申请日：2002-08-06
申请人：新日本製鐵株式会社
发明人：渡大橋 , 徹松宮 , 勝浩笹井
IPC分类号： B22D11/00 , C21C7/06 , B22D11/04 , B22D11/051 , B22D11/115 , B22D11/16 , C21C7/00 , C21C7/068 , C21C7/10 , C22C38/00 , C22C38/12

49. 发明专利

JP3726599B2 Refining method of molten steel using a carbon-containing refractory scrap 有权
$Refining method of molten steel using a carbon-containing refractory scrap$
公开(公告)号：JP3726599B2
公开(公告)日：2005-12-14
申请号：JP33283799
申请日：1999-11-24
申请人： Jfeスチール株式会社
发明人：道弘桑山 , 長人橋本 , 岳彦高橋
IPC分类号： C21C7/04 , C21C7/068

50. 发明专利

JP2005330522A Cast steel manufacturing method 审中-公开
标题翻译：铸钢制造方法
公开(公告)号：JP2005330522A
公开(公告)日：2005-12-02
申请号：JP2004148648
申请日：2004-05-19
申请人： Ozuki Seikosho:Kk , 株式会社小月製鋼所
发明人： IWASAKI HITOSHI , SAGAWA HIDEMI , FUKUMOTO SHIGEO , FUJITA KIKUO
IPC分类号： B22D1/00 , C21B13/10 , C21B13/12 , C21C5/52 , C21C7/04 , C21C7/06 , C21C7/068 , C21C7/072
CPC分类号： Y02P10/216
摘要： PROBLEM TO BE SOLVED: To provide a cast steel manufacturing method in which metal scrap including used steel cans are used for raw materials. SOLUTION: The cast steel manufacturing method comprises a step of melting raw materials including used steel cans at a temperature of ≥ 1,600°C, a step of performing oxidation refining of the molten raw materials, a step of performing reduction refining of the oxidation-refined raw materials by using a reducing agent, and a step of stirring the reduction-refined raw materials by using inert gas. Cast steel can be manufactured by using metal scrap including used steel cans as raw materials. COPYRIGHT: (C)2006,JPO&NCIPI

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