公开(公告)号：US11505854B2

公开(公告)日：2022-11-22

申请号：US16831307

申请日：2020-03-26

Applicant: HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION ,  JFE STEEL CORPORATION

Inventor： Hak Soo Kim ,  Kohsuke Ashizuka ,  Akio Kobayashi ,  Naomichi Nakamura ,  Masashi Fujinaga ,  Toshio Maetani ,  Hirofumi Enokido ,  Hisashi Sudo

IPC: B22F1/00 ,  C22C38/16 ,  C22C38/12 ,  B22F1/10

Abstract: The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %≤2.7  (1).

公开(公告)号：US09815115B2

公开(公告)日：2017-11-14

申请号：US14987117

申请日：2016-01-04

Applicant: JFE STEEL CORPORATION

Inventor： Yasuhiko Sakaguchi ,  Toshio Maetani

IPC: F27B9/04 ,  B22F1/00 ,  F27B9/24 ,  C21D1/74 ,  C21D3/02 ,  C21D3/04 ,  C21D3/08 ,  F27B9/02 ,  F27D7/02

CPC classification number: B22F1/0088 ,  B22F1/0003 ,  B22F1/0081 ,  B22F1/0085 ,  B22F2201/013 ,  B22F2201/10 ,  B22F2201/32 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00 ,  C21D1/74 ,  C21D3/02 ,  C21D3/04 ,  C21D3/08 ,  F27B9/028 ,  F27B9/045 ,  F27B9/047 ,  F27B9/243 ,  F27D7/02

Abstract: A finish heat treatment apparatus for an iron powder. Raw iron powder is placed on a continuous moving hearth and continuously charged into the apparatus. In a pretreatment zone, the raw iron powder is subjected to a pretreatment of heating the raw iron powder in an atmosphere of hydrogen gas and/or inert gas at 450 to 1100° C. In decarburization, deoxidation, and denitrification zones, the pretreated iron powder is subsequently subjected to at least two treatments of decarburization, deoxidation, and denitrification. In the pretreatment zone, a hydrogen gas and/or an inert gas serving as a pretreatment ambient gas is introduced separately from an ambient gas used in the at least two treatments is introduced from the upstream side of the pretreatment zone and released from the downstream side so as to flow in the same direction as a moving direction of the moving hearth.

公开(公告)号：US20160214171A1

公开(公告)日：2016-07-28

申请号：US15024628

申请日：2014-08-26

Applicant: JFE STEEL CORPORATION

Inventor： Toshio Maetani ,  Shigeru Unami ,  Tomoshige Ono ,  Yukiko Ozaki

IPC: B22F1/00 ,  C22C38/00 ,  C22C38/16 ,  C22C38/12 ,  B22F9/02 ,  B22F3/16

CPC classification number: B22F1/0074 ,  B22F1/0011 ,  B22F3/16 ,  B22F9/02 ,  B22F2301/35 ,  B22F2304/10 ,  C22C33/0264 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16

Abstract: Provided is an alloy steel powder for powder metallurgy that is capable of achieving both high strength and high toughness in a sintered body using the same. An alloy steel powder for powder metallurgy of this disclosure comprises a composite alloy steel powder and graphite powder. The composite alloy steel powder has a specific surface area of 0.100 m2/g or more and Mo content in a range of 0.2 mass % to 1.5 mass %, and the graphite powder content with respect to 100 mass % of the alloy steel powder for powder metallurgy is in a range of 0.1 mass % to 1.0 mass %.

Abstract translation: 本发明提供一种粉末冶金用合金钢粉末，其能够在使用其的烧结体中实现高强度和高韧性。 本公开的用于粉末冶金的合金钢粉末包括复合合金钢粉末和石墨粉末。 复合合金钢粉末的比表面积为0.100m 2 / g以上，Mo含量在0.2质量％〜1.5质量％的范围内，石墨粉末含量相对于粉末合金钢粉末的100质量％ 冶金在0.1质量％至1.0质量％的范围内。

公开(公告)号：US20160151837A1

公开(公告)日：2016-06-02

申请号：US14905054

申请日：2014-01-23

Applicant: JFE STEEL CORPORATION

Inventor： Kouichi Nushiro ,  Toshio Maetani ,  Tomoshige Ono ,  Yukiko Ozaki

IPC: B22F1/00 ,  B22F3/16 ,  B22F3/00 ,  B22F9/04

CPC classification number: B22F1/007 ,  B22F1/0059 ,  B22F3/004 ,  B22F3/16 ,  B22F9/04 ,  C22C33/02

Abstract: A mixed powder for powder metallurgy includes a machinability improvement powder that is crystalline layered alkaline silicate heat-treated at 400° C. to 1100° C. and whose mix proportion is in an amount of 0.01% to 1.0% by mass in terms of total content of an iron-based powder, an alloying powder, and the machinability improvement powder. Such a mixed powder not only enables a compact to be sintered without adversely affecting the environment in a sintering furnace, but also enables a sintered body having excellent lathe machinability and excellent drill machinability to be obtained.

Abstract translation: 粉末冶金用混合粉末包括：机械加工性改善粉末，其为在400℃〜1100℃下热处理的结晶层状碱性硅酸盐，其混合比例为0.01〜1.0质量％ 铁基粉末，合金粉末和可切削性改进粉末的含量。 这样的混合粉末不仅能够使烧结体的烧结不会对烧结炉的环境产生不利影响，而且能够获得具有优异的车床切削性和优异的钻削加工性的烧结体。

公开(公告)号：US11542579B2

公开(公告)日：2023-01-03

申请号：US16831307

申请日：2020-03-26

Applicant: HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION ,  JFE STEEL CORPORATION

Inventor： Hak Soo Kim ,  Kohsuke Ashizuka ,  Akio Kobayashi ,  Naomichi Nakamura ,  Masashi Fujinaga ,  Toshio Maetani ,  Hirofumi Enokido ,  Hisashi Sudo

IPC: B22F1/00 ,  C22C38/16 ,  B22F1/10 ,  C22C38/12

Abstract: The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %≤2.7  (1).

公开(公告)号：US20210071286A1

公开(公告)日：2021-03-11

申请号：US16831307

申请日：2020-03-26

Applicant: HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION ,  JFE STEEL CORPORATION

Inventor： Hak Soo KIM ,  Kohsuke Ashizuka ,  Akio Kobayashi ,  Naomichi Nakamura ,  Masashi Fujinaga ,  Toshio Maetani ,  Hirofumi Enokido ,  Hisashi Sudo

IPC: C22C38/16 ,  C22C38/12 ,  B22F1/00

Abstract: The present disclosure relates to an iron-based prealloy powder having excellent strength and processability, and an iron-based alloy powder for powder metallurgy and a sinter-forged member using the same. The iron-based prealloy powder for powder metallurgy according to an embodiment of the present disclosure includes 0.5 to 5.0 wt % of Cu, 0.1 to 0.5 wt % of Mo, and a balance of Fe and other inevitable impurities. A Cu content (Cu %) and a Mo content (Mo %) satisfy the following Relational Equation (1): 0.3×Cu %+3×Mo %≤2.7  (1).

公开(公告)号：US10265766B2

公开(公告)日：2019-04-23

申请号：US14787882

申请日：2014-04-25

Applicant: JFE STEEL CORPORATION

Inventor： Toshio Maetani ,  Shigeru Unami

IPC: B22F1/00 ,  B22F1/02 ,  C21D6/00 ,  C22C38/00 ,  C22C33/02 ,  C22C38/16 ,  C22C38/12 ,  B22F3/16 ,  B22F9/04

Abstract: Provided is an alloy steel powder for powder metallurgy containing an iron-based powder as a main component that is capable of achieving both high strength and high toughness in a sintered body using the same. In the alloy steel powder, the iron-based powder contains a reduced powder, and Mo content with respect to a total amount of the alloy steel powder is 0.2 mass % to 1.5 mass %, Cu powder content with respect to a total amount of the alloy steel powder is 0.5 mass % to 4.0 mass % and graphite powder content with respect to a total amount of the alloy steel powder is 0.1 mass % to 1.0 mass %.

公开(公告)号：US10207328B2

公开(公告)日：2019-02-19

申请号：US15529125

申请日：2015-11-24

Applicant: JFE STEEL CORPORATION

Inventor： Takuya Takashita ,  Akio Kobayashi ,  Naomichi Nakamura ,  Toshio Maetani ,  Akio Sonobe ,  Itsuya Sato

IPC: B22F7/00 ,  B22F1/00 ,  C22C38/12 ,  C22C38/16 ,  C22C33/02

Abstract: An Fe—Mo—Cu—C-based alloy steel powder for powder metallurgy has a chemical composition containing Mo: 0.2 mass % to 1.5 mass %, Cu: 0.5 mass % to 4.0 mass %, and C: 0.1 mass % to 1.0 mass %, with a balance being Fe and incidental impurities, wherein an iron-based powder has a mean particle size of 30 μm to 120 μm, and a Cu powder has a mean particle size of 25 μm or less. Despite the alloy steel powder for powder metallurgy having a chemical composition not containing Ni, a part produced by sintering a press formed part of the powder and further carburizing-quenching-tempering the sintered part has mechanical properties of at least as high tensile strength, toughness, and sintered density as a Ni-added part.