公开(公告)号：EP3584343B1

公开(公告)日：2024-09-25

申请号：EP18754123.0

申请日：2018-02-20

IPC: C22C38/00 ,  C21D1/06 ,  C21D8/06 ,  C21D9/32 ,  C22C38/12 ,  C22C38/26 ,  C23C8/26 ,  B21J5/00 ,  B21J1/06 ,  B21K1/30 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C23C8/02

CPC classification number: C21D1/06 ,  C21D8/06 ,  C21D9/32 ,  C22C38/00 ,  C22C38/12 ,  C22C38/26 ,  C23C8/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C8/02 ,  B21K1/30 ,  B21J1/06 ,  C21D2211/00520130101 ,  C21D2211/00920130101

公开(公告)号：EP4394059A1

公开(公告)日：2024-07-03

申请号：EP22872921.6

申请日：2022-09-21

Applicant: NTN Corporation

Inventor： MIZUTA, Kohei ,  FUJIMURA, Naoki

IPC: C21D9/40 ,  F16C33/64 ,  C22C38/00 ,  C22C38/22 ,  C21D1/06 ,  C23C8/26 ,  C23C8/32

CPC classification number: C21D1/06 ,  C21D9/40 ,  C22C38/00 ,  C22C38/22 ,  C23C8/26 ,  C23C8/32 ,  F16C33/64

Abstract: A mechanical component (10) includes steel and has a surface (10a, 10b, 10c, 10d). The steel is quenched and tempered. The mechanical component includes a nitrided layer (11) on the surface and a core (12) farther away from the surface than the nitrided layer. A nitrogen concentration in the steel on the surface is greater than or equal to 0.01 mass percent. A hardness of the steel on the surface is greater than or equal to 820 Hv. An amount of residual austenite in the steel in the core is greater than or equal to 0.1 volume percent and less than or equal to 9 volume percent. A dislocation density of the residual austenite in the steel in the core is greater than or equal to 4.0 × 1014 m-2. The steel is high carbon steel or bearing steel.

公开(公告)号：EP3913088B1

公开(公告)日：2024-05-22

申请号：EP20741641.3

申请日：2020-01-16

IPC: C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/60 ,  H01F1/147 ,  C23C22/00 ,  B23K26/352 ,  C22C38/02 ,  C22C38/04 ,  H01F1/18 ,  C21D1/76 ,  C21D1/26 ,  C23C28/04 ,  C21D6/00 ,  C22C38/06 ,  C23C8/26 ,  C23C22/08 ,  C23C22/74 ,  B23K101/36 ,  B23K103/04 ,  B23K103/06 ,  B23K15/00 ,  B23K103/16

CPC classification number: C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C21D1/26 ,  C21D8/1261 ,  C21D1/76 ,  C23C8/26 ,  C21D8/1283 ,  C21D8/1272 ,  C21D2201/0520130101 ,  C21D6/008 ,  C22C38/06 ,  C22C38/001 ,  C21D8/1255 ,  C23C22/08 ,  C23C22/74 ,  H01F1/18 ,  C23C28/04 ,  C21D8/1294 ,  B23K2103/17220180801 ,  B23K2103/0420180801 ,  B23K2101/3620180801 ,  B23K15/0086 ,  B23K15/0093 ,  C22C38/004

公开(公告)号：EP2789705B1

公开(公告)日：2018-10-10

申请号：EP12856064.6

申请日：2012-12-04

Applicant: NTN Corporation

Inventor： SATO, Daisuke ,  OHKI, Chikara ,  UENO, Takashi ,  KUSUMI, Yasutaka

IPC: C21D9/40 ,  C21D1/06 ,  C22C38/00 ,  C22C38/18 ,  C22C38/44 ,  F16C19/36 ,  F16C33/32 ,  F16C33/34 ,  F16C33/58 ,  F16C33/62 ,  F16C33/64 ,  F16C33/66 ,  F16C19/38 ,  F16C19/54

CPC classification number: C23C8/32 ,  C21D9/40 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/26 ,  C23C8/80 ,  F16C19/06 ,  F16C19/364 ,  F16C33/32 ,  F16C33/34 ,  F16C33/366 ,  F16C33/585 ,  F16C33/62 ,  F16C33/64 ,  F16C2204/66 ,  F16C2240/50 ,  F16C2240/54 ,  F16C2240/90 ,  F16C2361/61

Abstract: An outer ring (11), an inner ring (12) and a ball (13) serving as machine parts are each constituted of steel containing at least 0.60 mass % and not more than 1.50 mass % of carbon, at least 0.15 mass % and not more than 2.50 mass % of silicon, at least 0.30 mass % and not more than 1.50 mass % of manganese, and at least 0.20 mass % and not more than 2.00 mass % of chromium with the rest consisting of an impurity. A nitrogen concentration in surface layer portions (11B, 12B, 13B) under an outer ring rolling contact surface (11A), an inner ring rolling contact surface (12A) and a ball rolling surface (13A), each serving as a contact surface to be in contact with another part, is at least 0.3 mass %. An average quantity of residual austenite as a whole in each of the outer ring (11), the inner ring (12) and the ball (13) is not more than 20 volume %.

公开(公告)号：EP2459765B1

公开(公告)日：2018-09-05

申请号：EP10710876.3

申请日：2010-02-18

Applicant: H.E.F.

Inventor： CHAVANNE, Hervé ,  MAURIN-PERRIER, Philippe

IPC: C23C8/26 ,  C23C8/32 ,  C23C8/36 ,  C23C8/56 ,  C23C8/76 ,  C23C8/80 ,  A47J47/00 ,  C21D1/06 ,  C21D9/18

CPC classification number: C23C8/26 ,  C21D1/06 ,  C21D1/74 ,  C21D8/0257 ,  C21D8/0457 ,  C21D9/18 ,  C23C8/32 ,  C23C8/36 ,  C23C8/56 ,  C23C8/76 ,  C23C8/80

公开(公告)号：EP3360984A1

公开(公告)日：2018-08-15

申请号：EP16844455.2

申请日：2016-09-08

Applicant: Nippon Steel & Sumitomo Metal Corporation

Inventor： UMEHARA, Takahide ,  YUYA, Masato ,  DAITO, Yoshihiro

IPC: C23C8/26 ,  C21D9/00 ,  C21D9/32 ,  C22C38/00 ,  C22C38/60

CPC classification number: C23C8/26 ,  C21D9/00 ,  C21D9/32 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58 ,  C22C38/60

Abstract: A nitrided steel part excellent in pitting resistance and bending fatigue characteristic enabling reduction of size and decrease of weight of parts or enabling demand for high load capacities to be met, using as a material a steel material containing, by mass%, C: 0.05 to 0.25%, Si: 0.05 to 1.5%, Mn: 0.2 to 2.5%, P: 0.025% or less, S: 0.003 to 0.05%, Cr: over 0.5 to 2.0%, Al: 0.01 to 0.05%, and N: 0.003 to 0.025%, having a balance of Fe and impurities, having formed on the steel surface a compound larger of a thickness 3 µm or less containing iron, nitrogen, and carbon and a hardened layer formed below the compound layer, and having an effective hardened layer depth of 160 to 410 µm.

公开(公告)号：EP3175012A4

公开(公告)日：2018-03-21

申请号：EP15828180

申请日：2015-07-30

Applicant: UNIV CASE WESTERN RESERVE ,  SWAGELOK CO

Inventor： WILLIAMS PETER C ,  MARX STEVEN V ,  ERNST FRANK ,  AGOPONOVA V

IPC: C23C8/24 ,  C23C8/26 ,  C23C8/30

CPC classification number: C23C8/02 ,  C23C8/26 ,  C23C8/32

Abstract: A workpiece made from a self passivating metal and having one or more surface regions defining a Beilby layer as a result of a previous metal shaping operation is activated for subsequent low temperature gas hardening by exposing the workpiece to the vapors produced by heating an oxygen-free nitrogen halide salt.

公开(公告)号：EP3141627A4

公开(公告)日：2018-02-07

申请号：EP15807136

申请日：2015-06-15

Applicant: NIPPON STEEL & SUMITOMO METAL CORP

Inventor： TANIGUCHI SHUNSUKE ,  SAKURADA EISAKU

IPC: C22C38/00 ,  C21D1/06 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28 ,  C22C38/38 ,  C23C8/26

CPC classification number: C23C8/26 ,  C21D1/06 ,  C21D8/0226 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28 ,  C22C38/38

Abstract: Provided is a steel sheet for soft-nitriding treatment which has a chemical composition consisting of, in mass%, C: more than or equal to 0.02% and less than 0.07%, Si: less than or equal to 0.10%, Mn: 1.1 to 1.8%, P: less than or equal to 0.05%, S: less than or equal to 0.01%, Al: 0.10 to 0.45%, N: less than or equal to 0.01%, Ti: 0.01 to 0.10%, Nb: 0 to 0.1%, Mo: 0 to 0.1%, V: 0 to 0.1%, Cr: 0 to 0.2%, and the balance: Fe and impurities, satisfies [Mn+Al‰¥1.5], and has a total content of Ti, Nb, Mo, V, and Cr present as precipitates in the steel sheet of less than 0.03% in mass%. The steel sheet for soft-nitriding treatment has a metal structure in which a ferrite area ratio is more than or equal to 80%, and a ferrite dislocation density at a position of 50 µm from a surface of the steel sheet is 1×10 14 to 1×10 16 m -2 .

公开(公告)号：EP3239321A4

公开(公告)日：2018-01-03

申请号：EP15873381

申请日：2015-12-24

Applicant: JFE STEEL CORP

Inventor： SHINGAKI YUKIHIRO ,  OKUBO TOMOYUKI ,  INOUE HIROTAKA

IPC: C22C38/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  C23C8/02 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/16 ,  H01F1/18

CPC classification number: C21D8/1288 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  C23C8/02 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/16 ,  H01F1/18

Abstract: A grain-oriented electrical steel sheet that includes a base coating with a high TiN ratio advantageous for the application of tension to the steel sheet and has excellent magnetic property is provided. The grain-oriented electrical steel sheet includes: a base coating having a peak value PTiN of TiN in the form of osbornite, observed in a range of 42°

公开(公告)号：EP3098485A4

公开(公告)日：2017-11-15

申请号：EP15739765

申请日：2015-01-22

Applicant: KK RIKEN

Inventor： SHIMA YUJI

IPC: F16J9/26 ,  C21D1/06 ,  C21D1/32 ,  C21D9/40 ,  C21D9/52 ,  C22C38/00 ,  C22C38/32 ,  C23C8/02 ,  C23C8/26 ,  C23C8/38 ,  C23C8/50 ,  C23C8/80

CPC classification number: C21D9/40 ,  C21D1/06 ,  C21D1/18 ,  C21D1/25 ,  C21D1/30 ,  C21D1/32 ,  C21D1/58 ,  C21D9/52 ,  C21D2211/003 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/32 ,  C23C8/26 ,  C23C8/38 ,  C23C8/50 ,  F16J9/26