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1. 发明申请

US20110041653A1 METHOD OF MANUFACTURING ULTRA LOW CARBON FERRITIC STAINLESS STEEL 失效
标题翻译：制造超低碳不锈钢的方法
公开(公告)号：US20110041653A1
公开(公告)日：2011-02-24
申请号：US12747451
申请日：2008-09-30
申请人： Joo Hyun Park , Sun Min Byun , Sang Beom Lee , Min Oh Suk , Hee Ho Lee
发明人： Joo Hyun Park , Sun Min Byun , Sang Beom Lee , Min Oh Suk , Hee Ho Lee
IPC分类号： C21C7/00
CPC分类号： C21C7/10 , C21C7/0075 , C21C7/0685 , C21C7/072 , C21C7/076 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , Y02P10/242
摘要： The present invention relates to a method of manufacturing a ferritic stainless steel containing an ultra low level of carbon concentration in molten steel within time shorter than existing technology by controlling content, appropriate composition, and liquid-state fraction, etc., of Cr2O3 in slag to maximize vacuum decarburization refining efficiency, the method comprising: tapping molten steel to a ladle in a non-deoxidized state after pre-decarburization and denitrification in an AOD refining furnace and then removing non-deoxidized slag on an upper of the molten steel of the ladle; seating the ladle to a large vacuum furnace, reducing pressure and then blowing-in oxygen gas from the upper of the molten steel through a lance, thereby performing decarburization reaction; creating Al2O3 by injecting Al at point of time of beginning of oxygen blowing; forming CaO—Al2O3—Cr2O3—MgO-based slag by injecting calcium oxide at point of time of completion of the oxygen blowing to allow vacuum fine decarburization to be promoted by reaction between Cr2O3 in the slag and C in the molten steel through reaction of the molten steel and the slag with a good fluidity after the completion of the oxygen blowing; and supplying inert gas such as Ar through a porous plug on a bottom of the ladle in order to maximize efficiency of the vacuum fine decarburization.
摘要翻译：本发明涉及一种通过控制炉渣中Cr 2 O 3的含量，适当组成和液态分数等来制备在钢水中超过现有技术的时间内超低碳浓度的铁素体不锈钢的方法为了使真空脱碳精炼效率最大化，所述方法包括：在AOD精炼炉中预脱碳脱氮后，将钢水以非脱氧态的钢水进行脱水，然后除去钢水上部的未脱氧渣钢包将钢包放入大型真空炉中，降低压力，然后通过喷枪从钢水上部吹入氧气，进行脱碳反应; 通过在开始吹氧的时间点注入Al来产生Al2O3; 通过在氧气吹炼完成的时间点注入氧化钙，形成CaO-Al2O3-Cr2O3-MgO系的炉渣，以通过炉渣中的Cr 2 O 3与钢水中的C的反应促进真空微细脱碳完成吹氧后，钢水和炉渣具有良好的流动性; 并且通过多孔塞将诸如Ar的惰性气体在钢包的底部供应，以使真空精细脱碳的效率最大化。

2. 发明授权

US08277537B2 Method of manufacturing ultra low carbon ferritic stainless steel 失效
标题翻译：制造超低碳铁素体不锈钢的方法
公开(公告)号：US08277537B2
公开(公告)日：2012-10-02
申请号：US12747451
申请日：2008-09-30
申请人： Joo Hyun Park , Sun Min Byun , Sang Beom Lee , Min Oh Suk , Hee Ho Lee
发明人： Joo Hyun Park , Sun Min Byun , Sang Beom Lee , Min Oh Suk , Hee Ho Lee
IPC分类号： C21C7/072 , C21C7/076 , C21C7/10
CPC分类号： C21C7/10 , C21C7/0075 , C21C7/0685 , C21C7/072 , C21C7/076 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , Y02P10/242
摘要： A method of manufacturing a ferritic stainless steel containing an ultra low level of carbon concentration in molten steel within time shorter than existing technology by controlling content, appropriate composition, and liquid-state fraction, etc., of Cr2 O3 in slag to maximize vacuum decarburization refining efficiency, the method comprising: tapping molten steel to a ladle in a non-deoxidized state after pre-decarburization and denitrification in an ARGON OXYGEN DECARBURIZATION refining furnace and then removing non-deoxidized slag; placing the ladle in a vacuum furnace, reducing pressure and then blowing-in oxygen gas from the upper of the molten steel through a lance; creating Al2 O3 by injecting Al at point of time of beginning of oxygen blowing; forming CaO—Al2 O3 —Cr2 O3 —MgO-based slag by injecting calcium oxide at point of time of completion of the oxygen blowing; and supplying inert gas through a porous plug on a bottom of the ladle.
摘要翻译：一种通过控制炉渣中Cr 2 O 3的含量，适当组成和液态分数等在现有技术中短时间内在钢水中含有超低碳浓度的铁素体不锈钢的方法，以使真空脱碳最大化精炼效率，该方法包括：在ARGON OXYGEN DECARBURIZATION精炼炉中预脱碳脱氮后，将钢水以非脱氧状态脱水，然后除去未脱氧渣; 将钢包放置在真空炉中，减压，然后从钢水的上部通过喷枪吹入氧气; 通过在开始吹氧的时间点注入Al来产生Al 2 O 3; 通过在吹氧完成时注入氧化钙，形成CaO-Al 2 O 3 -Cr 2 O 3 -MgO基炉渣; 并通过钢包底部的多孔塞供应惰性气体。

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