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公开(公告)号：US6074493A
公开(公告)日：2000-06-13
申请号：US713189
申请日：1996-09-12
申请人： Tsuguhiko Nakagawa , Koushi Kuramoto , Nobuaki Hanazono , Jun Morozumi , Susumu Satoh , Susumu Okada
发明人： Tsuguhiko Nakagawa , Koushi Kuramoto , Nobuaki Hanazono , Jun Morozumi , Susumu Satoh , Susumu Okada
CPC分类号： C21D9/0062 , C21D1/19 , C23C8/22
摘要： This invention aims at providing a method of continuously carburizing a metal strip, which is capable of providing industrially optimum carburization conditions while attaining non-soot-generating atmospheric data, desired carburization concentration distribution and desired carburization rate, in a case where a strip passed through a carburization furnace is carburized continuously in a surface reaction rate-governing area in which the carbon concentration in a superficial layer of the strip has not yet reached an equilibruim level with respect to the time. The method consist of carburization concentration distribution (S7), on the basis of the carburization conditions including given specification data for the steel plate, furnace temperature and composition of the atmospheric gas, outputting the concentration of the components of the atmospheric gas, feed and discharge rates and other carburization conditions when the set carburization rate and an actual carburization rate are equal (S8-S15), and correcting the set carburization rate when a difference between the set carburization rate and an actual carburization rate is large, and correcting the strip feed rate while correcting the composition of the atmospheric gas when a difference between the predetermined carburization rate and set carburization rate is large (S9).
摘要翻译： 本发明的目的在于提供一种连续渗碳金属带的方法，该方法能够在条带通过的情况下获得工业上最佳的渗碳条件，同时获得产生非烟灰的大气数据，所需的渗碳浓度分布和所需的渗碳速率 渗碳炉在表面反应速率控制区域中连续渗碳，其中带材的表面层中的碳浓度相对于时间尚未达到平衡水平。 该方法包括渗碳浓度分布（S7），基于包括给出的钢板规格数据，炉温和气氛气体组成的渗碳条件，输出大气气体成分浓度，进料和排出 当设定的渗碳速率和实际渗碳速率相等时（S8-S15），并且当设定的渗碳速率和实际渗碳速率之间的差异大时校正设定的渗碳速率，并且校正带材进料 当预定的渗碳速率和设定的渗碳速率之间的差异大时，校正气氛气体的组成的速率（S9）。
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