公开(公告)号：US20190032190A1

公开(公告)日：2019-01-31

申请号：US16145137

申请日：2018-09-27

Applicant: NHK SPRING CO., LTD.

Inventor： Morimichi KAI ,  Akira TANGE

IPC: C23C8/04 ,  B60G21/055 ,  C21D1/06 ,  C23C8/22 ,  C23C8/02 ,  C23C8/80 ,  C21D9/08

Abstract: A hollow stabilizer production method of a hollow stabilizer used for a vehicle includes attaching a first mounting member and a second mounting member respectively to one end and another end of a formed steel tube and heating the steel tube. The method includes feeding a carburizing gas into the interior space of the heated steel tube through the first mounting member, and collecting the air and/or the surplus carburizing gas from the interior space through the second mounting member to thereby carburize the steel tube inner surface. The method includes rapidly cooling the heated steel tube to thereby quench the steel tube continuously from the carburization.

公开(公告)号：US20190032191A1

公开(公告)日：2019-01-31

申请号：US16145158

申请日：2018-09-27

Applicant: NHK SPRING CO., LTD.

Inventor： Morimichi KAI ,  Akira TANGE

IPC: C23C8/22 ,  C21D9/02 ,  C21D1/06 ,  C23C8/80 ,  C23C8/02 ,  C23C8/04 ,  C21D9/08 ,  F16F1/14 ,  B60G21/055 ,  F16F1/04 ,  B60G11/14 ,  F16F1/06

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 for a vehicle includes a steel tube sealed at one end and another end thereof and a carburizing gas sealed in the interior space of the steel tube.

公开(公告)号：US20180080113A1

公开(公告)日：2018-03-22

申请号：US15814892

申请日：2017-11-16

Applicant: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY ,  NHK SPRING CO., LTD.

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

IPC: C23C8/22 ,  C21D1/06 ,  C23C8/80

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 includes a heating furnace which heats a material, a transfer mechanism, an alcohol vapor generator, an alcohol vapor spraying portion, a quenching tank, and an exhaust heat intake tube. The transfer mechanism moves a plurality of materials. The alcohol vapor generator uses part of heat generated by the heating furnace as a heat source. As the alcohol vapor spraying portion repeats a vapor spraying step and a diffusion step a plurality of times in the heating furnace. In the vapor spraying step, by spraying alcohol vapor on the material which moves inside the heating furnace, carbon in the alcohol is adsorbed to the material. In the diffusion step, an interval for diffusing the carbon adsorbed to the material is taken.