公开(公告)号：US12064837B2

公开(公告)日：2024-08-20

申请号：US17107120

申请日：2020-11-30

申请人： KONGJU NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION

发明人： Nam Chul Cho ,  Jeong Wook Han ,  Sung Mo Cho

IPC分类号： B23P15/40 ,  B21J5/12 ,  B21K11/02 ,  B24B3/54 ,  B26B3/02 ,  C21D9/18 ,  C23F1/02 ,  C23F1/14 ,  C21D1/58

CPC分类号： B23P15/40 ,  B21J5/12 ,  B21K11/02 ,  B24B3/54 ,  B26B3/02 ,  C21D9/18 ,  C23F1/02 ,  C23F1/14 ,  C21D1/58

摘要： This application relates to a method of manufacturing a knife using a multilayer material. In one aspect, the method includes preparing a multilayer material for manufacturing a knife, and heating and then forging the multilayer material to form a knife-shaped structure including a blade part and a handle part. The method also includes grinding the blade part to form a sharpened knife-edge and applying mud, including kaolin and white clay, to an entire surface of the knife-shaped structure and removing the mud applied to the blade part. The method further includes heating the knife-shaped structure applied with the mud, and quenching the heated knife-shaped structure through oil-cooling. The method further includes etching a surface of the quenched knife-shaped structure to form a pattern on the surface and grinding the surface-etched knife-shaped structure to form a knife having a final shape.

公开(公告)号：US20240167135A1

公开(公告)日：2024-05-23

申请号：US18280419

申请日：2023-06-30

申请人： SHANGHAI JIAOTONG UNIVERSITY

发明人： Yujie WANG ,  Bo MAO ,  Jiao ZHANG ,  Baode SUN ,  Qing DONG ,  Jiangbo YANG ,  Haitao JIANG

IPC分类号： C22C38/36 ,  B22D17/20 ,  C21D1/19 ,  C21D1/58 ,  C21D1/60 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

CPC分类号： C22C38/36 ,  B22D17/2023 ,  C21D1/19 ,  C21D1/58 ,  C21D1/60 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24

摘要： The present disclosure provides a carbide refining method of a high-carbon high-alloy steel. The carbide refining method of a high-carbon high-alloy steel includes the following steps: formulating a raw material according to chemical element compositions of the high-carbon high-alloy steel, and smelting to obtain a high-carbon high-alloy molten steel; performing an overheat treatment on the high-carbon high-alloy molten steel to Tm+(50˜100)° C., to obtain a high-carbon high-alloy melt, and making the high-carbon high-alloy melt to be deposited in a preset water-cooled copper mold at a speed of 30˜160 g/s by an inert gas, to obtain a high-carbon high-alloy billet through solidification molding; and performing a heat treatment process on the high-carbon high-alloy billet.

公开(公告)号：US20230119812A1

公开(公告)日：2023-04-20

申请号：US17759873

申请日：2021-02-03

申请人： IDEMITSU KOSAN CO.,LTD.

发明人： Takahito SUGIURA

IPC分类号： C21D1/58

摘要： A quench oils composition containing a sulfur compound capable of improving the brightness of a metal material after a heat treatment, such as quenching, while preventing the sulfur content from being excessively increased. This is achieved by a quench oils composition containing one or more base oil selected from a mineral oil, a synthetic oil, and a vegetable oil, and one or more sulfur-containing aromatic compound selected from a particular sulfide compound and a particular sulfone compound.

公开(公告)号：US20220195549A1

公开(公告)日：2022-06-23

申请号：US17550951

申请日：2021-12-14

申请人： Northwestern University

发明人： Yip-Wah Chung ,  Qian Wang ,  Arman Mohammad Khan ,  Tobias Vela Martin

IPC分类号： C21D8/02 ,  C22C38/22 ,  C22C38/24 ,  C21D1/58 ,  C21D1/60 ,  C21D1/613

摘要： Methods for forming carbon-based lubricious and/or wear-protective films in situ on the surface of steel alloys are provided. The methods use chromium-containing steel alloys, molybdenum-containing steel alloys, and steel alloys that contain both copper and nickel. When such alloys are subjected to a rubbing motion in the presence of a hydrocarbon fluid, the chromium, molybdenum, copper, and nickel in the steel alloy catalyzes the formation of solid carbon-containing films that reduce the friction, wear, or both of the contacting surfaces.

公开(公告)号：US11174528B2

公开(公告)日：2021-11-16

申请号：US15750734

申请日：2016-06-20

申请人： BEIJING HUALI FINE CHEMICAL CO., LTD.

发明人： Kejian Zhang ,  Shui Wang ,  Xuezhi Hao ,  Shengdong Ge

IPC分类号： C21D9/28 ,  C21D1/64 ,  C21D1/63 ,  C21D1/58 ,  C21D1/18 ,  C21D1/62

摘要： An oil-immersion quenching cooling precursor and an oil-immersion quenching cooling method includes an axle-type workpiece or a workpiece that has sections in an axle form. Several separation rings are arranged on the workpiece in the axial direction to separate the axle-type workpiece or the workpiece that has sections in an axle form into a plurality of sections before oil-immersion quenching cooling. In the method, there is a cutting procedure before a quenching cooling procedure. Several separation rings distributed in the axial direction are reserved outside a dimension required for the workpiece. sections before oil-immersion quenching cooling. In the method, there is a cutting procedure before a quenching cooling procedure. Several separation rings distributed in the axial direction are reserved outside a dimension required for the workpiece.

公开(公告)号：US10731099B2

公开(公告)日：2020-08-04

申请号：US15550868

申请日：2016-02-16

申请人： IDEMITSU KOSAN CO., LTD.

发明人： Hideaki Hattori ,  Katsumi Ichitani

IPC分类号： C21D1/58 ,  C10M159/12 ,  C10M159/02 ,  C10M159/04 ,  C10M127/00 ,  C10M105/00 ,  C10M169/04

摘要： A heat treatment oil composition is provided that suppresses the decrease of luster in a heat treatment of a metal material, and is capable of suppressing the increase of the number of second (characteristic number of second) until reaching the temperature where the vapor blanket stage ends with the lapse of time and the decrease of the kinetic viscosity with the lapse of time. The heat treatment oil composition contains (A) a base oil and (B) a vapor blanket breaking agent selected from one or more of a petroleum resin, a terpene resin, rosin, and derivatives thereof.

公开(公告)号：US10589332B2

公开(公告)日：2020-03-17

申请号：US15303154

申请日：2015-04-10

申请人： Sentek Pty Ltd.

发明人： Peter Tucker

IPC分类号： B21C37/26 ,  B21F3/10 ,  B21K5/02 ,  E21B17/22 ,  B23K31/02 ,  C21D1/06 ,  C21D1/18 ,  C21D1/58 ,  C21D9/22 ,  E21B10/44 ,  B23K101/00 ,  B23K101/08

摘要： An auger useable for creating an opening in the ground for a soil sensor housing wherein the sensor housing has a predetermined volume and a tapered outer surface, includes an auger made in accordance with the methods described and defined in this specification. The auger having a shaft having an outer surface of circular cross-section having an larger outer diameter at one end than the other end and a strip material having a helical shape with an inner wall having a larger inner diameter at one end than the other end of the helical shape wherein the helically shaped material is fixed over the outer diameter of the shaft to form a tapered auger with helical flighting. The volume of the opening created by an auger in the ground will provide a matching volume for a sensor housing of a predetermined volume such that substantially the full length of the tapered outer surface of the sensor is adjacent the ground along the full length/depth of the created opening.

公开(公告)号：US20200048727A1

公开(公告)日：2020-02-13

申请号：US16056990

申请日：2018-08-07

申请人： GM Global Technology Operations LLC

发明人： Jianghuai Yang ,  James D. Cremonesi ,  Paul J. Gelazin ,  Qigui Wang ,  Daniel J. Wilson

IPC分类号： C21D9/30 ,  F16C3/08 ,  C21D1/18 ,  C21D1/58 ,  C22C38/00

摘要： A method for manufacturing a crankshaft for an internal combustion engine with a plurality of journals having a hardened case with a first microstructure. The crankshaft is comprised of a steel comprising between about 0.3 wt % and 0.77 wt % Carbon. The first microstructure of the hardened case of the journals comprises between about 15% and 30% ferrite and a balance of martensite and the resultant subsurface residual stress between 310 MPa and 620 MPa.

公开(公告)号：US10508318B2

公开(公告)日：2019-12-17

申请号：US15022650

申请日：2014-09-08

申请人： NTN CORPORATION ,  Eri Hirayama ,  Tsuneaki Hiraoka ,  Shintaro Suzuki

发明人： Eri Hirayama ,  Tsuneaki Hiraoka ,  Shintaro Suzuki

IPC分类号： C21D9/40 ,  C21D1/10 ,  C21D1/42 ,  C21D1/58

摘要： When a plurality of outer rings (R) are sequentially and inductively heated to a target temperature by energizing a heating coil (2) elongated more than each of the plurality of outer rings (R), which are made of steel and retained coaxially by a retaining unit (3), while relatively moving the outer rings (R) and the heating coil (2) in an axial direction, an output of the heating coil (2) is varied in consideration of the number of outer rings (R) present in an opposing region of the heating coil (2).

公开(公告)号：US20190143398A1

公开(公告)日：2019-05-16

申请号：US15814657

申请日：2017-11-16

申请人： FORD GLOBAL TECHNOLOGIES, LLC

发明人： Nathaniel Hansen ,  Phillip Schroeder ,  Roger L. Moyer ,  Michael A. Kopmanis

IPC分类号： B21H7/18 ,  B24B39/04 ,  C21D9/30 ,  C21D1/58 ,  C21D1/08 ,  C21D1/42

摘要： An automotive shaft fillet treating method including laser hardening a green machined fillet surface to a uniform depth d to induce compressive stresses into the surface, the surface extending the entire length l between outer edges of two undercut regions of the fillet, and applying additional compressive stress to the laser hardened surface via fillet rolling such that the uniform depth d is maintained along the entire length l during a subsequent grinding operation.