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公开(公告)号：US09809868B2
公开(公告)日：2017-11-07
申请号：US14422929
申请日：2013-08-20
发明人： Liping Wu , Chang Shen , Yuchang Hu , Yuanwang Pan , Shaomin Pu , Yong Wang , Yangguo Xie
摘要： Provided is a straight barrel type vacuum refining device comprising a vacuum chamber and a snorkel; during the vacuum refining the snorkel is inserted into the molten steel of the steel ladle, it is characterized in that, disposing a circulating tube being on the circumference of said snorkel, and blowing argon gas into the snorkel through the nozzles on an inner wall of a circulating tube; said circulating tubes are disposed in layers, the nozzles on the circulating tubes in the same layer are individually controlled as 2-6 in one group; disposing an eccentric gas permeable brick at the bottom of said steel ladle, and blowing argon gas into the steel ladle through the eccentric gas permeable brick, driving a circulating flow molten steel between the steel ladle and the vacuum chamber by using different blowing flow rate combinations of a steel ladle bottom blowing and each individually controlled unit of the circulating tube blowing system.
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2.发明授权公开(公告)号：US11434553B2
公开(公告)日：2022-09-06
申请号：US16314394
申请日：2017-07-06
发明人： Mingru Zhang , Hai Zhao , Zheng Fang , Feng Zhang , Rongjie Deng , Manli Sun
摘要： The present invention discloses a low cost lean production bainitic steel wheel for rail transit and a manufacturing method therefor. The steel wheel contains elements with the following weight percentages: carbon C: 0.15-0.45%, silicon Si: 1.00-2.50%, manganese Mn: 1.20-3.00%, rare earth RE: 0.001-0.040%, phosphorus P≤0.020%, and sulphur S≤0.020%, where the remaining is iron and unavoidable residual elements, and 3.00%≤Si+Mn≤5.00%. Compared with the prior art, through alloying design and a preparation process, especially a heat treatment process and technology, a rim of the wheel obtains a carbide-free bainite structure, and a web and a wheel hub obtain granular bainite, a supersaturated ferritic structure, and a small amount of pearlite. The wheel has high comprehensive mechanical properties and service performance. In addition, the heat treatment process and technology are fully used without particularly adding alloying elements such as Mo, Ni, V, Cr, and B, to greatly reduce costs of steel and realize lean production.
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公开(公告)号：US20150240323A1
公开(公告)日：2015-08-27
申请号：US14422929
申请日：2013-08-20
发明人： Liping Wu , Chang Shen , Yuchang Hu , Yuanwang Pan , Shaomin Pu , Yong Wang , Yangguo Xie
摘要： Provided is a straight barrel type vacuum refining device comprising a vacuum chamber and a snorkel; during the vacuum refining the snorkel is inserted into the molten steel of the steel ladle, it is characterized in that, disposing a circulating tube being on the circumference of said snorkel, and blowing argon gas into the snorkel through the nozzles on an inner wall of a circulating tube; said circulating tubes are disposed in layers, the nozzles on the circulating tubes in the same layer are individually controlled as 2-6 in one group; disposing an eccentric gas permeable brick at the bottom of said steel ladle, and blowing argon gas into the steel ladle through the eccentric gas permeable brick, driving a circulating flow molten steel between the steel ladle and the vacuum chamber by using different blowing flow rate combinations of a steel ladle bottom blowing and each individually controlled unit of the circulating tube blowing system.
摘要翻译： 提供一种直筒式真空精炼装置，其包括真空室和通气管; 在真空精炼期间，将通气管插入钢水包的钢水中，其特征在于，设置在所述通气管的圆周上的循环管，并且通过所述喷嘴在内壁上的喷嘴将氩气吹入所述通气管 循环管; 所述循环管分层设置，同一层中的循环管上的喷嘴被单独控制为2-6组; 在所述钢包的底部设置偏心透气砖，并通过偏心透气砖将氩气吹入钢包中，通过使用不同的吹送流量组合驱动钢包和真空室之间的循环流钢水 的钢包底吹和循环吹管系统的每个独立控制单元。
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