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1. 发明申请

US20080149227A1 Method for oxygen free carburization in atmospheric pressure furnaces 审中-公开
标题翻译：大气压力炉中无氧渗碳的方法
公开(公告)号：US20080149227A1
公开(公告)日：2008-06-26
申请号：US11645447
申请日：2006-12-26
申请人： Karen Anne Connery , Robert Marcel De Wilde , Richard A. Novak , Simon Ho , Amitabh Gupta
发明人： Karen Anne Connery , Robert Marcel De Wilde , Richard A. Novak , Simon Ho , Amitabh Gupta
IPC分类号： C23C8/00
CPC分类号： C23C8/20
摘要： A method of oxygen-free heat treatment of a steel part in an atmospheric pressure furnace is disclosed. The present method employs an oxygen-free controlled gas atmosphere including hydrogen gas in concentrations between about 1.0 percent to 10.0 percent, a hydrocarbon gas, such as propylene, in concentrations of between about 0.1 percent and 10.0 percent that varies as a function of time, with the balance of the gas atmosphere being nitrogen. The presently disclosed oxygen-free heat treatment process, preferably a carburization process, uses a precisely controlled atmosphere to minimize inter-granular oxidation, eliminate the formation of soot and cementite or other metallic carbides, and avoid hydrogen embrittlement.
摘要翻译：公开了一种在大气压力炉中对钢部件进行无氧热处理的方法。本方法采用无氧的可控气体气氛，包括浓度在约1.0％至10.0％之间的氢气，烃气体（如丙烯）的浓度在约0.1％至10.0％之间，其浓度随时间而变化，气体气氛的平衡是氮气。目前公开的无氧热处理方法，优选渗碳方法，使用精确控制的气氛以使颗粒间氧化最小化，消除烟灰和渗碳体或其它金属碳化物的形成，并避免氢脆化。

2. 发明申请

US20080149225A1 METHOD FOR OXYGEN FREE CARBURIZATION IN ATMOSPHERIC PRESSURE FURNACES 审中-公开
标题翻译：大气压力炉中无氧自由化的方法
公开(公告)号：US20080149225A1
公开(公告)日：2008-06-26
申请号：US11959825
申请日：2008-02-14
申请人： Karen Anne Connery , Richard A. Novak , Simon Ho , Amitabh Gupta , Robert Marcel De Wilde
发明人： Karen Anne Connery , Richard A. Novak , Simon Ho , Amitabh Gupta , Robert Marcel De Wilde
IPC分类号： C23C8/20
CPC分类号： C23C8/20 , C21D1/74 , C21D1/76
摘要： A method of oxygen-free heat treatment of a steel part in an atmospheric pressure furnace is disclosed. The present batch treatment process employs an oxygen-free controlled gas atmosphere including hydrogen gas in concentrations between about 1.0 percent to 10.0 percent, a hydrocarbon gas, such as propylene, in concentrations of between about 0.1 percent and 10.0 percent that varies as a function of time, with the balance of the gas atmosphere being nitrogen. The present continuous furnace treatment process employs a plurality of zones with each zone including an oxygen-free controlled gas atmosphere including hydrogen gas in concentrations between about 1.0 percent to 10.0 percent that varies across the different zones, a hydrocarbon gas, such as propylene, in concentrations of between about 0.1 percent and 10.0 percent that varies across the different zones, with the balance of the gas atmosphere within each zone being nitrogen. The presently disclosed oxygen-free heat treatment processes, preferably carburization processes, use a precisely controlled atmosphere to minimize inter-granular oxidation, eliminate the formation of soot and cementite or other metallic carbides, and avoid hydrogen embrittlement.
摘要翻译：公开了一种在大气压力炉中对钢部件进行无氧热处理的方法。本批次处理方法采用无氧可控气体气氛，其中浓度为约1.0％至10.0％之间的氢气，烃类气体（如丙烯）的浓度为约0.1％至10.0％，其浓度为时间，天然气气氛的平衡是氮气。本连续炉处理方法采用多个区域，每个区域包括无氧的可控气体气氛，包括在不同区域之间变化的浓度在约1.0％至10.0％之间的氢气，烃气体如丙烯，在不同区域之间变化的约0.1％和10.0％之间的浓度，每个区域内的气体气氛的平衡是氮气。目前公开的无氧热处理方法，优选渗碳方法，使用精确控制的气氛以使颗粒间氧化最小化，消除烟灰和渗碳体或其它金属碳化物的形成，并避免氢脆化。

3. 发明申请

US20080149226A1 Method of optimizing an oxygen free heat treating process 审中-公开
标题翻译：优化无氧热处理工艺的方法
公开(公告)号：US20080149226A1
公开(公告)日：2008-06-26
申请号：US11645443
申请日：2006-12-26
申请人： Karen Anne Connery , Richard A. Novak , Simon Ho , Amitabh Gupta , Robert De Wilde
发明人： Karen Anne Connery , Richard A. Novak , Simon Ho , Amitabh Gupta , Robert De Wilde
IPC分类号： C23C8/00
CPC分类号： C23C8/32 , C21D1/76 , C23C8/22
摘要： A method of controlling an oxygen-free heat treating process in an atmospheric pressure furnace is disclosed. The present method employs an oxygen-free gas atmosphere including hydrogen gas in concentrations between about 1.0 percent to 10.0 percent, a hydrocarbon gas, such as propylene, in concentrations of between about 0.1 percent and 10.0 percent that varies as a function of time, with the balance of the gas atmosphere being nitrogen. The presently disclosed oxygen-free carburization process uses a precisely controlled gas atmosphere to minimize inter-granular oxidation, eliminate the formation of soot and cementite, and avoid hydrogen embrittlement.
摘要翻译：公开了一种在大气压力炉中控制无氧热处理工艺的方法。本发明方法采用无氧气体气氛，其中浓度为约1.0％至10.0％之间的氢气，烃气体（例如丙烯）的浓度为约0.1％至10.0％，其浓度随时间而变化，天然气气氛的平衡是氮气。目前公开的无氧渗碳方法使用精确控制的气体气氛来最小化颗粒间氧化，消除烟灰和渗碳体的形成，并避免氢脆化。

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