公开(公告)号：US11441881B2

公开(公告)日：2022-09-13

申请号：US17065716

申请日：2020-10-08

Applicant: TRUE VELOCITY IP HOLDINGS, LLC

Inventor： Lonnie Burrow

IPC: F42B5/30 ,  F42B5/02 ,  F42B5/307 ,  F42B33/00 ,  F42B33/02 ,  F42C19/08 ,  F42B5/313 ,  F42B33/04 ,  B22F3/00 ,  B22F3/10 ,  B22F3/22 ,  B22F5/00 ,  B22F5/06 ,  C04B35/64 ,  C22C1/04 ,  C22C14/00 ,  C22C33/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/58

Abstract: The present invention provides an ammunition cartridge having a primer insert having a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and one or more pads positioned on the recess bottom; a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive a polymer overmolding.

公开(公告)号：US11433457B2

公开(公告)日：2022-09-06

申请号：US16605247

申请日：2018-05-10

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Mohammed S. Shaarawi ,  James McKinnell ,  David A. Champion ,  Vladek P. Kasperchik

IPC: B22F10/00 ,  B22F3/10 ,  B22F5/00 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/165 ,  B22F10/14 ,  B22F10/85 ,  B22F10/64 ,  B22F10/68 ,  B22F10/32 ,  B22F10/47 ,  B33Y40/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/10 ,  B33Y80/00 ,  C09D11/033 ,  C09D11/38 ,  B22F1/05 ,  B33Y70/00 ,  B33Y40/20 ,  B29K505/00

Abstract: An apparatus is disclosed to create a breakaway junction for 3D printed parts. Powder is spread along a target zone, such as a build bed. A liquid functional agent is selectively dispensed upon the powder to form a 3D object, a supporting part, and the breakaway junction between them.

公开(公告)号：US20220274173A1

公开(公告)日：2022-09-01

申请号：US17637477

申请日：2019-10-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Pavan Suri ,  Mackensie Smith ,  James McKinnell

IPC: B22F10/14 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y30/00 ,  C22C38/48 ,  B22F1/05 ,  C22C38/42 ,  B22F3/10 ,  B33Y40/20

Abstract: Three-dimensional printing can include iteratively applying build material layers including stainless steel particles, iteratively applying a binding agent to individual build material layers to define individually patterned object layers that become adhered to one another to form a layered green body object, and sintering the layered green body object in a sintering oven. The stainless steel particles can include from about (2) wt % to about (6) wt % nickel, from about (14) wt % to about (19) wt % chromium, from about (2) wt % to about (6) wt % copper, and up to about (700) ppm carbon. Sintering can include ramping up the temperature to about (1240)° C. to about (1320)° C., pausing for about (30) minutes to about (12) hours, and ramping up the temperature to about (1350)° C. to about (1400)° C. for (10) minutes to about (6) hours.

公开(公告)号：US20220226895A1

公开(公告)日：2022-07-21

申请号：US17657053

申请日：2022-03-29

Applicant: THE PENN STATE RESEARCH FOUNDATION

Inventor： Selda Nayir ,  Ramakrishnan RAJAGOPALAN ,  Daudi WARYOBA ,  Clive RANDALL

IPC: B22F3/10 ,  B22F3/26 ,  B22F1/10 ,  C30B7/10

Abstract: Embodiments can relate to an improved hydroflux, additive or electroless plating assisted densification cold sintering process to densify powdered metals at lower compaction pressures and lower temperatures (e.g., 520 MPa and 140° C.). The process can involve inducing dissolution precipitation mechanisms at powder interfaces by introducing a transport phase (formed by the introduction of water during the process to suppress melting temperatures) that is not an aqueous solution. Particle interfaces in the cold sinter fuse together by the presence of the additional transport phase, thereby reducing the temperatures and pressures needed for compaction. Some embodiments involve the use of elements to form a eutectic at the desired low temperature, thereby stabilizing certain crystal structure shapes of isometric crystal systems, inducing rapid densification, and facilitating pore smoothing. Embodiments of the process can be used to generate a green compact via sintering that exhibits improved green strength.

公开(公告)号：US20220213584A1

公开(公告)日：2022-07-07

申请号：US17602605

申请日：2020-03-26

Applicant: GKN Sinter Metals, LLC

Inventor： David E. Lenhart, JR.

IPC: C23C8/22 ,  B22F3/17 ,  B22F3/10 ,  B22F5/08

Abstract: A method of carburizing a powder metal part involving more than one carburizing step. In a pre-forging carburizing step, a powder metal part that is less than fully dense is carburized to establish a pre-forging carburization profile. After the pre-forging carburizing step, the powder metal part is forged so that the powder metal part is increased in density and the pre-forging carburization profile is transformed into an as-forged carburization profile. In a post-forging carburizing step following the forging step, the powder metal part is again carburized, thereby resulting in both further diffusion of carbon from the as-forged carburization profile into the powder metal part and further introduction of carbon into the powder metal part at a surface of the powder metal part.

公开(公告)号：US20220212363A1

公开(公告)日：2022-07-07

申请号：US17702929

申请日：2022-03-24

Applicant: UT-Battelle, LLC

Inventor： Kurt A. Terrani ,  Michael P. Trammell ,  Brian C. Jolly

IPC: B28B1/00 ,  B22F7/02 ,  B22F3/10 ,  C04B35/573 ,  G21C3/324 ,  C04B35/52 ,  C04B35/56

Abstract: A method for the manufacture of a three-dimensional object using a refractory matrix material is provided. The method includes the additive manufacture of a green body from a powder-based refractory matrix material followed by densification via chemical vapor infiltration (CVI). The refractory matrix material can be a refractory ceramic (e.g., silicon carbide, zirconium carbide, or graphite) or a refractory metal (e.g., molybdenum or tungsten). In one embodiment, the matrix material is deposited according to a binder-jet printing process to produce a green body having a complex geometry. The CVI process increases its density, provides a hermetic seal, and yields an object with mechanical integrity. The residual binder content dissociates and is removed from the green body prior to the start of the CVI process as temperatures increase in the CVI reactor. The CVI process selective deposits a fully dense coating on all internal and external surfaces of the finished object.

公开(公告)号：US20220189750A1

公开(公告)日：2022-06-16

申请号：US17598473

申请日：2019-09-20

Applicant: JX Nippon Mining & Metals Corporation

Inventor： Yuki Furuya

IPC: H01J37/34 ,  C23C14/34 ,  B22F3/10 ,  C22C5/04 ,  C22C19/07 ,  C22C30/00 ,  C22C32/00

Abstract: Provided is a sputtering target capable of reducing generation of particles, and a method for producing the same. The sputtering target includes: 10 mol % or more and 85 mol % or less of Co, 0 mol % or more and 47 mol % or less of Pt, and 0 mol % or more and 47 mol % or less of Cr, as metal components; and at least B6O as an oxide component.

公开(公告)号：US20220176458A1

公开(公告)日：2022-06-09

申请号：US17682226

申请日：2022-02-28

Applicant: Arcam AB

Inventor： Anders Snis

IPC: B22F12/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B23K15/00 ,  B29C64/268 ,  B23K15/06 ,  B29C64/277 ,  B23K26/082 ,  B22F3/10 ,  B23K26/08

Abstract: A method for producing three-dimensional objects layer by layer using a powdery material which can be solidified by irradiating it with at least two electron beams, said method comprises a pre-heating step, wherein the pre-heating step comprises the sub-step of scanning a pre-heating powder layer area (100) by scanning a first electron beam in a first region (I) and by scanning a second electron beam in a second region (II) distributed over the pre-heating powder layer area (100), wherein consecutively scanned paths are separated by, at least, a security distance (ΔY), said sub-step further comprising the step of synchronising the preheating of said first and second electron beams when simultaneously preheating said powder material within said first and second regions respectively, so that said first and second electron beams are always separated to each other with at least a minimum security distance (ΔX).

公开(公告)号：US20220145437A1

公开(公告)日：2022-05-12

申请号：US17434176

申请日：2020-04-24

Applicant: Diamet Corporation

Inventor： Ryosuke FUKUDA ,  Yohei TAKAFUJI

IPC: C22C38/54 ,  C22C38/44 ,  C22C38/00 ,  C22C38/02 ,  B22F3/10 ,  F16C33/58

Abstract: A heat-resistant sintered sliding member according to the present invention has a structure in which a lubrication phase is dispersed in a matrix, in which an entire composition of the sliding member is composed of a composition containing, by mass %, Cr: 18% to 35%, Mo: 0.3% to 15%, Ni: 0% to 30%, Si: 0.5% to 6%, S: 0.2% to 4.0%, P: 0% to 1.2%, B: 0% to 0.8%, and a Fe balance containing inevitable impurities, in which the matrix is a Fe—Cr—Mo—Si-based matrix or a Fe—Cr—Mo—Ni—Si-based matrix, the lubrication phase contains chromium sulfide, and a porosity of an entire sliding member is 2.0% or less.

公开(公告)号：US20220134425A1

公开(公告)日：2022-05-05

申请号：US17083758

申请日：2020-10-29

Applicant: GM Global Technology Operations LLC

Inventor： Md Ashabul Anam ,  Mark A. Smith ,  Tyson W. Brown ,  Richard J. Skurkis ,  HyungMin Chae ,  Whitney A. Poling

IPC: B22F3/105 ,  B22F3/10

Abstract: A powder bed fusion system includes a powder bed including a build surface and a vacuum system. The vacuum system includes a collection device positioned over the build surface. The collection device includes a body, a pathway defined in the body, wherein the pathway ends in a passageway opening, and a particle retainer connected to the body near the passageway opening. A method of forming a component includes forming a layer of unfused metal powder on a powder bed with a recoater, introducing gas to the powder bed and applying a vacuum with a collection device, fusing a portion of the layer of unfused metal powder on the powder bed with a heat source to form a component layer and generating contaminants, collecting the contaminants from the powder bed with the gas and the vacuum applied by the collection device.