公开(公告)号：US20210066729A1

公开(公告)日：2021-03-04

申请号：US16964825

申请日：2019-02-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Hideya KAMINAKA ,  Koichi NOSE ,  Yoshitaka NISHIYAMA ,  Junko IMAMURA ,  Haruka SATO ,  Yuya TAKASHIMA

IPC: H01M8/0228 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/0215

Abstract: A titanium material includes a base material made of pure titanium or a titanium alloy; and a carbon layer covering a surface of the base material. The carbon layer includes non-graphitizable carbon, and has an R value (I1350/I1590) of 2.0 or more and 3.5 or less in the Raman spectroscopy using laser having a wavelength of 532 nm. Where I1350 is peak intensity at a wave number of around 1.35×105 m−1 in a Raman spectrum, and I1590 is peak intensity at a wave number of around 1.59×105 m−1 in a Raman spectrum. According to this titanium material, it is possible to realize low contact resistance by the carbon layer. Moreover, this titanium material is not susceptible to surface oxidation and capable of maintaining low contact resistance even when exposed to noble potential.

公开(公告)号：US20210054509A1

公开(公告)日：2021-02-25

申请号：US16959292

申请日：2019-01-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Takumi NISHIMOTO ,  Yoshitaka NISHIYAMA

IPC: C23C22/34 ,  C23C22/78 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/52 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/58

Abstract: Provided are an austenitic heat resistant alloy capable of exhibiting sufficient molten-salt corrosion resistance even when exposed to a molten salt of 600° C. and a production method thereof, and an austenitic heat-resistant alloy material. An austenitic heat resistant alloy of the present disclosure includes a base metal, and a Ni—Fe oxide having a spinel type structure on or above the surface of the base metal. The base metal has a chemical composition consisting of, in mass %, C: 0.030 to 0.120%, Si: 0.02 to 1.00%, Mn: 0.10 to 2.00%, Cr: 20.0% or more to less than 28.0%, Ni: more than 35.0% to 50.0% or less, W: 4.0 to 10.0%, Ti: 0.01 to 0.30%, Nb: 0.01 to 1.00%, sol. Al: 0.0005 to 0.0400%, B: 0.0005 to 0.0100%, Mo: less than 0.5%, Co: 0 to 0.80%, and Cu: 0 to 0.50%, with the balance being Fe and impurities.

公开(公告)号：US20210062345A1

公开(公告)日：2021-03-04

申请号：US16958003

申请日：2019-01-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Takumi NISHIMOTO ,  Yoshitaka NISHIYAMA

IPC: C23C22/34 ,  B32B15/01 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/52

Abstract: Provided is an austenitic heat resistant alloy capable of exhibiting sufficient molten-salt corrosion resistance even when exposed to a molten salt of 600° C., and a production method thereof. The austenitic heat resistant alloy of the present disclosure includes a base metal and a Fe—Cr—Ni—W film on the surface of the base metal. The base metal has a chemical composition consisting of: C: 0.030 to 0.120%, Si: 0.02 to 1.00%, Mn: 0.10 to 2.00%. Cr: 20.0% or more to less than 28.0%, Ni: more than 35.0% to 50.0% or less, W: 4.0 to 10.0%, Ti: 0.01 to 0.30%, Nb: 0.01 to 1.00%, sol. Al: 0.0005 to 0.0400%, and B: 0.0005 to 0.0100%, with the balance being Fe and impurities. The Fe—Cr—Ni—W film contains, as oxides, Fe: 15.0 to 35.0 at %, Cr: 15.0 to 35.0 at %, Ni: 10.0 to 45.0 at %, and W: 0.5 to 16.5 at %.