公开(公告)号：EP3299488A1

公开(公告)日：2018-03-28

申请号：EP16796396.6

申请日：2016-05-12

Applicant: National University Corporation Yokohama National University ,  NHK Spring Co., Ltd.

Inventor： NAKAO, Wataru ,  TANGE, Akira ,  TANGO, Koichi ,  KAI, Morimichi

IPC: C23C8/22 ,  C21D1/06 ,  C21D9/02

CPC classification number: C23C8/22 ,  C21D1/06 ,  C21D9/02 ,  C23C8/20 ,  C23C8/80 ,  F27B9/045 ,  F27B9/3005 ,  F27B9/40 ,  F27D17/004

Abstract: A carburization device (10B) includes a heating furnace (50) which heats a material (11) made of steel, a transfer mechanism (55), an alcohol vapor generator (32B), an alcohol vapor spraying portion (57), a quenching tank (58), and an exhaust heat intake tube (61). The transfer mechanism (55) moves a plurality of materials (11) from an inlet portion (51) toward an outlet portion (52) of the heating furnace (50). The alcohol vapor generator (32B) uses part of heat generated by the heating furnace (50) as a heat source. As the alcohol vapor spraying portion (57) repeats a vapor spraying step and a diffusion step a plurality of times in the heating furnace (50), a carburization treatment of the material (11) is performed. In the vapor spraying step, by spraying alcohol vapor on the material (11) which moves inside the heating furnace (50), carbon in the alcohol is adsorbed to the material (11). In the diffusion step, an interval for diffusing the carbon adsorbed to the material is taken.

Abstract translation: 渗碳装置（10B）包括加热由钢制成的材料（11）的加热炉（50），传送机构（55），醇蒸气发生器（32B），醇蒸气喷射部分（57），淬火 （58）和排热吸入管（61）。 传送机构55使多种材料11从加热炉50的入口部51朝向出口部52移动。 醇蒸气发生器（32B）利用加热炉（50）产生的热量的一部分作为热源。 当醇蒸汽喷射部分57在加热炉50中多次重复蒸汽喷射步骤和扩散步骤时，对材料11进行渗碳处理。 在蒸汽喷射步骤中，通过向在加热炉（50）内移动的材料（11）喷射醇蒸气，醇中的碳被吸附到材料（11）上。 在扩散步骤中，获取用于扩散吸附在材料上的碳的间隔。

公开(公告)号：EP3438320A1

公开(公告)日：2019-02-06

申请号：EP17773782.2

申请日：2017-02-15

Applicant: NHK Spring Co., Ltd.

Inventor： KAI, Morimichi ,  TANGE, Akira

IPC: C23C8/22 ,  C21D1/06 ,  C21D9/02 ,  F16F1/06 ,  F16F1/14

Abstract: A hollow spring member and hollow spring member production method can be provided, which can save the time and energy necessary for carburization, thus requiring no dedicated carburizing furnace or the like for carburization, and further can make the interior space of a steel tube a rust-prevention atmosphere. A hollow stabilizer (10) for a vehicle includes a steel tube (10P) sealed at one end and another end (11, 12) thereof and a carburizing gas sealed in the interior space (13) of the steel tube (10P).

公开(公告)号：EP3438321A1

公开(公告)日：2019-02-06

申请号：EP17773783.0

申请日：2017-02-15

Applicant: NHK Spring Co., Ltd.

Inventor： KAI, Morimichi ,  TANGE, Akira

IPC: C23C8/22 ,  B60G21/055 ,  C21D1/06 ,  C21D9/08

Abstract: Provide a production method and production device of a hollow stabilizer making it possible to consecutively carry out carburization and quenching of a hollow stabilizer, save the time necessary for carburization and energy consumed by carburization, and requiring no dedicated carburizing furnace for the purpose of carburization. A hollow stabilizer production method of a hollow stabilizer used for a vehicle includes attaching a first mounting member (75) and a second mounting member (82) respectively to one end (101) and another end (102) of a formed steel tube (100) and heating the steel tube (100). The method includes feeding a carburizing gas into the interior space (103) of the heated steel tube (100) through the first mounting member (75), and collecting the air and/or the surplus carburizing gas from the interior space (103) through the second mounting member (82) to thereby carburize the steel tube inner surface (105). The method includes rapidly cooling the heated steel tube (100) to thereby quench the steel tube (100) continuously from the carburization.