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11. 发明授权

US4769090A Rapid carburizing process in a continuous furnace 失效
标题翻译：在连续炉中快速渗碳过程
公开(公告)号：US4769090A
公开(公告)日：1988-09-06
申请号：US883927
申请日：1986-07-10
申请人： Philippe Queille
发明人： Philippe Queille
IPC分类号： C23C8/20 , C23C8/22 , C21D1/74
CPC分类号： C23C8/22
摘要： Process in which there are injected a carrier gas and a hydrocarbon capable of producing, at conventional carburizing temperatures, an atmosphere of predetermined composition having a nominal concentration of carbon monoxide, a door of the furnace being opened with a given periodicity to permit the passage of a charge to be carburized, the opening of this door resulting in particular in an increase in the concentration of the oxidizing species in the atmosphere of the furnace. According to the invention, the concentration of carbon monoxide of the atmosphere injected into the furnace is increased with the same periodicity so as to compensate for the increase in the concentration of the oxidizing species of the furnace and thus maintain the carbon potential of the carburizing atmosphere of the furnace substantially constant throughout the duration of the carburization of the workpieces of the charge.
摘要翻译：在其中注入载气和烃的方法，其能够在常规渗碳温度下产生具有标称浓度的一氧化碳的预定组成的气氛，炉门以给定的周期性打开以允许要渗碳的电荷，该门的打开特别是在炉的气氛中氧化物质的浓度增加。根据本发明，注入炉内的气氛的一氧化碳浓度以相同的周期性增加，以补偿炉的氧化物质浓度的增加，从而保持渗碳气氛的碳势的炉子在电荷的工件的渗碳过程中基本上恒定。

12. 发明授权

US4744839A Process for a rapid and homogeneous carburization of a charge in a furnace 失效
标题翻译：在炉中快速均匀渗碳的方法
公开(公告)号：US4744839A
公开(公告)日：1988-05-17
申请号：US885852
申请日：1986-07-15
申请人： Philippe Queille
发明人： Philippe Queille
IPC分类号： C23C8/20 , C23C8/22 , C21D1/74
CPC分类号： C23C8/22
摘要： The process comprises opening the door of the furnace, introducing a charge into the furnace which was previously conditioned at the carburization temperature, closing the door of the furnace, subjecting the charge to a first phase, termed carburization phase, in the course of which the rate of transfer of the carbon of the atmosphere to the surface of the workpiece is preponderant relative to the rate of diffusion of the carbon from the surface of the workpiece to the interior of the workpiece, then to a second phase, termed diffusion phase, in the course of which said rate of diffusion becomes preponderant relative to said rate of transfer, the charge being possibly cooled before the opening of the door of the furnace so as to permit its extraction and the introduction of a new charge, a carrier gas, to which hydrocarbon may be added, being introduced into the furnace throughout the duration of the process. According to the invention, the flow rate D.sub.1 of carrier gas during the carburization phase is related to the flow rate D.sub.2 of carrier gas during the diffusion phase by the relation1.2 D.sub.2 .ltoreq.D.sub.1 .ltoreq.2.times.D.sub.2,the flow rate D.sub.2 being higher than or equal to the minimum safety limit of the considered furnace.
摘要翻译：该方法包括打开炉门，向炉中引入装料，该装置预先在渗碳温度下调节，关闭炉门，使装料进入称为渗碳相的第一相，其中相对于碳从工件表面扩散到工件内部的速度，大气对工件表面的传递速度是主要的，然后是称为扩散阶段的第二阶段其传播速率相对于所述转移速率变得重要，其过程可能在炉门打开之前被冷却，以允许其提取并引入新的电荷载体气体可以在该过程的整个持续时间内将可加入的烃引入炉中。根据本发明，渗碳阶段期间载气的流速D1与扩散阶段中载气的流量D2关系为D2 D2

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