公开(公告)号：US20200277687A1

公开(公告)日：2020-09-03

申请号：US16650988

申请日：2018-10-11

Applicant: HITACHI, LTD. ,  TOHOKU UNIVERSITY

Inventor： Tadashi FUJIEDA ,  Kousuke KUWABARA ,  Atsuhiko OONUMA ,  Akihiko CHIBA ,  Yuichiro KOIZUMI ,  Kenta YAMANAKA

IPC: C22C14/00 ,  B22F9/08 ,  B33Y80/00 ,  B33Y70/00 ,  F01D5/14

Abstract: Provided is a heat-resistant titanium (Ti) alloy member having excellent mechanical characteristics and oxidation resistance at high temperatures and having less mechanical anisotropy, a method for producing such a titanium alloy member, and a product including such an alloy member. A titanium-based alloy member includes titanium (Ti) as a major element and at least 0.5 to 2.0 mass % of boron (B) and has a dispersion of fiber-like TiB particles precipitated in a polycrystal matrix phase, the TiB particles each having a long axis of 1 to 10 μm and a short axis of 0.01 to 0.5 μm or less and having an aspect ratio of 2 to 1000, the TiB particles precipitating in a crystallographically random direction in each of crystal grains of the matrix phase.

公开(公告)号：US20170209922A1

公开(公告)日：2017-07-27

申请号：US15327974

申请日：2015-07-17

Applicant: HITACHI, LTD.

Inventor： Takahiko KATO ,  Kousuke KUWABARA ,  Tadashi FUJIEDA ,  Kinya AOTA ,  Isamu TAKAHASHI ,  Kenji YAMAGA ,  Hiroyuki SATAKE ,  Hajime MURAKAMI

IPC: B22F1/00 ,  C22C30/00 ,  B22D23/00 ,  C22C1/02 ,  C22C1/06 ,  B22F9/08 ,  B33Y70/00

CPC classification number: B22F1/0014 ,  B22D23/00 ,  B22F3/1055 ,  B22F9/082 ,  B22F2009/0824 ,  B22F2009/0848 ,  B22F2998/10 ,  B33Y70/00 ,  C22C1/02 ,  C22C1/0433 ,  C22C1/06 ,  C22C30/00 ,  C22C33/0285 ,  Y02P10/295 ,  C21C5/5211 ,  C21C7/0075 ,  C21C7/10

Abstract: An alloy structure which has high uniformity in the distribution of the element composition and the mechanical strength and excellent high-temperature strength and corrosion resistance, contains Fe and at least four elements, which are selected from the group consisting of elements from atomic number 13 to atomic number 79, included in Group 3 to Group 16 of the periodic table of the elements, and have a ratio of the atomic radius to an Fe atom of 0.83 or more but 1.17 or less, each of the elements in an atomic concentration range of 5 at % or more but 30 at % or less, a difference in atomic concentration among the at least four elements and Fe is in a range of less than 3 at %, and the alloy structure has, as a main crystal, a column crystal in which the at least four elements and Fe are solid-dissolved.

公开(公告)号：US20170209954A1

公开(公告)日：2017-07-27

申请号：US15328280

申请日：2015-07-17

Applicant: HITACHI, LTD.

Inventor： Takahiko KATO ,  Kousuke KUWABARA ,  Tadashi FUJIEDA ,  Kinya AOTA ,  Isamu TAKAHASHI ,  Hiroyuki SATAKE ,  Kenji YAMAGA ,  Hajime MURAKAMI

IPC: B23K15/00 ,  B33Y70/00 ,  C22C30/00 ,  B22F1/00 ,  B22F9/08 ,  B33Y10/00 ,  B33Y80/00

CPC classification number: B23K15/0086 ,  B22F1/0003 ,  B22F3/1055 ,  B22F9/082 ,  B22F2009/0824 ,  B22F2009/0888 ,  B22F2998/10 ,  B23K15/0093 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C22C30/00 ,  C22C33/0257 ,  Y02P10/295 ,  C21C5/5211 ,  C21C7/0075 ,  C21C7/10

Abstract: An alloy structure has an arbitrary shape dimension which has high uniformity in the distribution of the element composition. The alloy structure contains Fe and at least four elements, which are selected from the group consisting of elements from atomic number 13 to atomic number 79 included in Group 3 to Group 16 of the periodic table of the elements and have a ratio of the atomic radius to an Fe atom of 0.83 or more but 1.17 or less, each of Fe and the four elements is contained in an atomic concentration range of 5 at % or more but 30 at % or less, a difference in atomic concentration between at least four elements among the at least four elements and Fe is in a range of less than 3 at %, and the alloy structure has, a column crystal in which the at least four elements and Fe are solid-dissolved.

公开(公告)号：US20160138151A1

公开(公告)日：2016-05-19

申请号：US14897113

申请日：2013-06-10

Applicant: HITACHI, LTD.

Inventor： Kousuke KUWABARA ,  Minseok PARK

IPC: C23C8/66 ,  C23C28/04 ,  C23C4/06

CPC classification number: C23C8/66 ,  C23C4/06 ,  C23C4/18 ,  C23C24/04 ,  C23C28/048

Abstract: A plurality of layers are laminated on at least part of the member under treatment made of steel, the plurality of layers having carbon concentrations higher than that of the member under treatment and 1.0 wt. % or less, the carbon concentration of an outermost layer of the plurality of layers being the highest. A method for manufacturing a steel part, including spraying powder containing carbon on at least part of an member under treatment made of steel so as to form a first layer having a carbon concentration higher than that of the member under treatment and spraying powder containing carbon on at least part of the first layer so as to form a second layer having a carbon concentration higher than that of the first layer. Carbon concentrations of a plurality of layers including the first layer and the second layer are 1.0 wt. % or less.

Abstract translation: 在由钢制成的处理部件的至少一部分上层叠多个层，多个层的碳浓度高于处理部件的碳浓度，1.0重量％ ％以下，多层的最外层的碳浓度最高。 一种钢部件的制造方法，其特征在于，在由钢制成的处理部件的至少一部分上喷涂含有碳的粉末，形成碳浓度高于所述处理部件的碳浓度的第一层，并且喷涂含有碳的粉末 至少部分第一层，以便形成碳浓度高于第一层的第二层。 包括第一层和第二层的多个层的碳浓度为1.0重量％。 ％ 或更少。