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1. 发明专利

JP2005248226A Heat treatment method 有权
标题翻译：热处理方法
公开(公告)号：JP2005248226A
公开(公告)日：2005-09-15
申请号：JP2004057951
申请日：2004-03-02
申请人： Dowa Mining Co Ltd , Toyota Motor Corp , トヨタ自動車株式会社 , 同和鉱業株式会社
发明人： TAKEMOTO SHINICHI , SUZUKI HIROYOSHI , ABE KOJI , NISHIYAMA TOMOHIKO , KOYAMA YASUHIRO
IPC分类号： C23C8/22 , C21D1/06
摘要： PROBLEM TO BE SOLVED: To provide a method capable of stably performing heat treatment even in a low CP (carbon potential) atmosphere.
SOLUTION: When a steel part is held to a holder, and is heat-treated in an atmosphere satisfying a CP of ≤0.8%, the thickness of an oxide layer formed on the surface of the holder is retained to ≤150 μm. The holder is, e.g., composed of a material having oxidation resistance higher than that of SUS304. Further, when the thickness of the oxide layer formed on the surface of the holder exceeds 150 μm, the oxide layer may be removed from the surface of the holder, or it may be exchanged for a new holder. Stable heat treatment can be operated even in a low CP atmosphere by retaining the thickness of the oxide layer formed on the surface of the holder holding the steel part to ≤150 μm.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供即使在低CP（碳势）的气氛中也能够稳定地进行热处理的方法。解决方案：当将钢部件保持在支架上并在满足CP≤0.8％的气氛中热处理时，形成在保持器表面上的氧化物层的厚度保持为≤150μm 。保持器例如由耐氧化性高于SUS304的材料构成。此外，当形成在保持器表面上的氧化物层的厚度超过150μm时，氧化物层可以从保持器的表面去除，或者可以更换为新的保持器。通过将形成在保持钢部件的保持器的表面上形成的氧化物层的厚度保持为≤150μm，即使在低CP气氛中也能够进行稳定的热处理。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2006152417A Heat treatment method and heat treatment apparatus 有权
标题翻译：热处理方法和热处理装置
公开(公告)号：JP2006152417A
公开(公告)日：2006-06-15
申请号：JP2004348488
申请日：2004-12-01
申请人： Dowa Mining Co Ltd , Toyota Motor Corp , トヨタ自動車株式会社 , 同和鉱業株式会社
发明人： SUZUKI HIROYOSHI , TAKEMOTO SHINICHI , ABE KOJI , OHASHI TOSHIAKI , SAKURAI TAKASHI , NISHIYAMA TOMOHIKO
IPC分类号： C23C8/22 , C21D1/06 , C21D1/76 , F27B9/04 , F27D7/06
摘要： PROBLEM TO BE SOLVED: To provide a heat treatment method for stably returning CP to a target value even if the CP has greatly decreased, and to provide a heat treatment apparatus therefor.
SOLUTION: The heat treatment method for supplying an enriched gas into a furnace 3 and heat-treating an article 2 to be treated in the furnace 3 by feedback-controlling carbon potential by controlling a flow rate of the supplied enriched gas on the basis of the carbon potential in the furnace 3 comprises steps for: stopping the feedback control and keeping the flow rate of the supplied enriched gas immediately before stopping the feedback control while openings 31 and 33 of the furnace 3 are opened, and in the period after the openings 31 and 33 of the furnace have been closed and before the carbon potential in the furnace 3 reaches a target value; and feedback-controlling the carbon potential after the carbon potential in the furnace 3 has reached the target value after the openings 31 and 33 of the furnace 3 have been closed.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：待解决的问题：即使CP大大降低，也提供一种用于将CP稳定地返回到目标值的热处理方法，并提供一种热处理装置。解决方案：将富集气体供应到炉3中并通过反馈控制碳势来对在炉3中待处理的物品2进行热处理的热处理方法，通过控制供应的富氧气体在炉3中的碳势的基础包括以下步骤：在炉3的开口31和33打开之前，停止反馈控制并保持所供应的富集气体的流量在停止反馈控制之前，并且在后期炉的开口31和33已经关闭，并且在炉3中的碳势达到目标值之前; 并且在炉3的开口31和33已经关闭之后，在炉3中的碳电势已经达到目标值之后反馈控制碳势。版权所有（C）2006，JPO＆NCIPI

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