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1.发明授权公开(公告)号：US09234252B2
公开(公告)日：2016-01-12
申请号：US14105167
申请日：2013-12-12
发明人： Dianzhong Li , Paixian Fu , Hongwei Liu , Lijun Xia , Yiyi Li
CPC分类号： C21C7/064 , C21C7/0075 , C21C7/06 , C21C7/0645 , C21C7/076 , C21C7/10 , C22C38/22 , C22C38/40 , Y02P10/242
摘要： A method for controlling A-shaped segregation of steel ingot. The method includes: 1) controlling a content of phosphorus in liquid steel at less than or equal to 0.005 wt. % upon tapping from an electric furnace, preventing steel slag from entering a ladle, controlling content of harmful elements at less than or equal to 100 ppm; and adding between 3 and 15 kg of calcium oxide and less than or equal to 0.5 kg of aluminum to each ton of the liquid steel; 2) pre-deoxidizing the liquid metal using vacuum carbon deoxidation; 3) de-sulfurizing, controlling content of oxygen, and controlling the content of sulfur in the liquid steel at less than or equal to 0.005 wt. %; and 4) performing vacuum degasification, controlling the total oxygen content at less than or equal to 15 ppm; and casting the steel in the presence of inert gas or in vacuum.
摘要翻译： 控制钢锭A型偏析的方法。 该方法包括：1）控制钢液中的磷含量小于或等于0.005wt。 从电炉出来，防止钢渣进入钢包，控制有害元素的含量小于或等于100ppm; 并向每吨液态钢中加入3至15kg的氧化钙和少于或等于0.5kg的铝; 2）使用真空碳脱氧对液态金属进行预脱氧; 3）脱硫，控制氧含量，控制钢液中硫的含量小于或等于0.005wt。 ％; 和4）进行真空脱气，控制总氧含量小于或等于15ppm; 并在惰性气体存在下或在真空中铸造钢。
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公开(公告)号：US11655512B2
公开(公告)日：2023-05-23
申请号：US17641732
申请日：2019-09-29
发明人： Dianzhong Li , Yikun Luan , Pei Wang , Xiaoqiang Hu , Paixian Fu , Hongwei Liu , Lijun Xia , Chaoyun Yang , Hanghang Liu , Hang Liu , Yiyi Li
CPC分类号： C21C7/0006 , C21C7/10 , C22C33/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06
摘要： Provided in the present application are a rare-earth microalloyed steel and a control process. The steel has a special microstructure, and the microstructure comprises a rare earth-rich nanocluster having a diameter of 1-50 nm. The nanocluster has the same crystal structure type as a matrix. The rare earth-rich nanocluster inhibits the segregation of the elements S, P and As on a grain boundary, and obviously improves the fatigue life of the steel. In addition, a rare-earth solid solution also directly affects a phase change dynamics process so that the diffusion-type phase change starting temperature in the steel changes at least to 2° C., and even changes to 40-60° C. in some kinds of steel, thereby greatly improving the mechanical properties thereof, and providing a foundation for the development of more kinds of high-performance steel.
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公开(公告)号：US12091733B2
公开(公告)日：2024-09-17
申请号：US18142152
申请日：2023-05-02
发明人： Dianzhong Li , Yikun Luan , Hongwei Liu , Paixian Fu , Xiaoqiang Hu , Pei Wang , Lijun Xia , Chaoyun Yang , Hanghang Liu , Yang Liu , Peng Liu , Yiyi Li
CPC分类号： C22C38/005 , C21C7/0006 , C21C7/04 , C21C7/06 , C22C33/04 , C22C38/004
摘要： A control process of inclusions in ultra-clean rare earth steel, wherein the content of rare earth elements REM in the ultra-clean rare earth steel, the total oxygen content T[O]m, the total sulfur content T[S]m in the steel, and the total oxygen content T[O]r in a rare earth metal or alloy added to the steel are controlled to satisfy the following formula: −500
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