Abstract: The invention belongs to the technical field of metal ceramics, in particular to a metal ceramic and a preparation method thereof. The hard phase is formed by at least four kinds of crystal grains with different compositions and shapes; and in the scanning electron microscope photograph of the metal ceramic, it can be observed the first hard phase comprising black titanium nitrocarbide, a thin ring and a thick ring wherein the core phase is pure black; the second hard phase in the form of a dark gray core-ring structure particles; the third hard phase in the form of a high-brightness white core-gray ring; and the fourth hard phase in the form of a homogenous gray phase and off-white core-gray ring structure particles. In addition, a white binder phase can also be observed, and the binder phase is at least one of cobalt and nickel.

Abstract: A stainless steel with a yield strength of 2,200 MPa or more is disclosed through the generation of the strain-induced martensite phase and the increase of the martensite phase strength. A high strength stainless steel according to an embodiment of present disclosure includes, in percent (%) by weight of the entire composition, C: 0.14 to 0.20%, Si: 0.8 to 1.0%, Mn: more than 0 and 0.5% or less, Cr: 15.0 to 17.0%, Ni: 4.0 to 5.0%, Mo: 0.6 to 0.8%, Cu: 0.5% or less, N: 0.05 to 0.11%, the remainder of iron (Fe) and other inevitable impurities, and C+N: 0.25% or more and Md30 value satisfies 40° C. or more.

Abstract: The present disclosure is directed at methods of preparing rare earth-based permanent magnets having improved coercivity and remanence, the method comprising one or more steps comprising: (a) homogenizing a first population of particles of a first GBM alloy with a second population of particles of a second core alloy to form a composite alloy preform, the first GBM alloy being substantially represented by the formula: ACbRxCoyCudMz, the second core alloy being substantially represented by the formula G2Fe14B, where AC, R, M, G, b, x, y, and z are defined; (b) heating the composite alloy preform particles to form a population of mixed alloy particles; (c) compressing the mixed alloy particles, under a magnetic field of a suitable strength to align the magnetic particles with a common direction of magnetization and inert atmosphere, to form a green body; (d) sintering the green body; and (e) annealing the sintered body.

Abstract: A metering apparatus and corresponding method meter a powder material in a three-dimensional (3D) printing system. The metering apparatus comprises a hopper with walls configured to contain a powder material, a metering roller, and a tool. The metering roller is located beneath an opening of the hopper. The metering roller and a given wall of the walls of the hopper are spaced apart by a gap therebetween at the opening; the gap in combination with rotation of the metering roller causes the powder material to flow from under the given wall of the hopper at a substantially predictable rate. The tool is positioned at the given wall where the flow emerges and is configured to force the powder material off of the metering roller to supply the 3D printing system with the powder material for printing a 3D object.

Abstract: A high-efficiency and short-process method for preparing a high-strength and high-conductivity copper alloy is disclosed, comprising the following steps: performing horizontal continuous casting to obtain an as-cast primary billet of copper alloy, wherein the alloying elements in the obtained as-cast primary billet being in a supersaturated solid solution state; after peeling the obtained as-cast primary billet, directly performing continuous extrusion, cold working and aging annealing treatment to obtain a copper alloy, and keeping the alloying elements of the billet in a supersaturated solid solution state during the process of continuous extrusion. The method shortens the flow, reduces energy consumption and improves the product forming rate.

Abstract: The present invention relates to the composition and production of an engineered degradable metal matrix composite that is useful in constructing temporary systems requiring wear resistance, high hardness, and/or high resistance to deformation in water-bearing applications such as, but not limited to, oil and gas completion operations.

Abstract: The present invention provides a high thermal conductivity aluminum alloy, which comprises the following components in percentage by weight: Al: 80%-90%; Si: 6.5%-8.5%; Fe: 0.2%-0.5%; Zn: 0.8%-3%; V: 0.03%-0.05%; Sr: 0.01%-1%; graphene: 0.02%-0.08%. In the high thermal conductivity aluminum alloy of the present invention, alloying elements including Si, Fe, and Zn are optimized; Sr, V, graphene, among others are added. The amount of each component is controlled so that they coordinate to ALLOW high thermal conductivity, good casting performance and excellent semi-solid die-casting property. Graphene is introduced to the high thermal conductivity aluminum alloy of the present invention to exploit the good thermal conductivity of graphene, allowing the formation of a high thermal conductivity aluminium alloy.

Abstract: A method for connecting or joining a first substrate and a second substrate across an interface between the first substrate and the second substrate. The method includes disposing a fastener precursor in the bore and sintering the fastener precursor in the bore. The fastener precursor densifies and shrinks in at least one dimension to mechanically interlock with a contour in the bore and form a mechanical fastener in the bore, and the mechanical fastener forms an interlock between the first substrate and the second substrate.

Abstract: An arrangement for adjusting a powder flow in relation to the central longitudinal axis of an energy beam for a working head which is formed for powder application welding. There is a device for the two-dimensional or three-dimensional alignment of the powder supply in relation to the central longitudinal axis of the energy beam in a plane oriented at right angles to the central longitudinal axis of the energy beam. From one side, a linear beam is directed to the region in which the particles of the powdery material meet one another. At right angles thereto, there is arranged an optical detector array for locally resolved detection of intensities connected to an electronic evaluation unit designed to determine the shape, size and/or length of an irradiated region in which locally resolved intensities which exceed a predefinable threshold have been detected with the optical detector array.

Abstract: A process for manufacturing ceramic-metal composite material, comprises dissolving ceramic powder into water to obtain an aqueous solution of ceramic; mixing metal powder having a multimodal particle size where largest particle size is one fourth of the minimum dimension of a device, with the aqueous solution of ceramic to obtain a powder containing ceramic precipitated on the surface of metal particles; mixing the powder containing ceramic precipitated on the surface of the metal particles, with ceramic powder having a particle size below 50 ?m, to obtain a powder mixture; adding saturated aqueous solution of ceramic to the powder mixture to obtain an aqueous composition containing ceramic and metal; compressing the aqueous composition to form a disc of ceramic-metal composite material containing ceramic and metal; and removing water from the ceramic-metal composite material; wherein ceramic content of the disc is 10 vol-% to 35 vol-%. Alternatively, ceramic-ceramic composite material may be manufactured.

Abstract: An apparatus for dispensing build powder and support powder, in a sequence of layers, and having a frame and a container. Also, a build powder pourer is at least partially filled with build powder and a support powder pourer at least partially filled with support powder, each of the pourers having a dispensing opening and a dispensing plug, controllably covering the dispensing opening. Further, a pourer-movement and dispensing plug-actuating assembly is supported by the frame over the container and includes a movement element that is selectively attachable to the build powder pourer and alternately to the support powder pourer and also capable to controllably move an attached pourer in three orthogonal dimensions and to control the dispensing plug. In addition, at least one docking station for holding a first one of the pourers; and a computing assembly controls the pourer-movement and dispensing plug-actuating assembly to create a target shape.

Abstract: A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking is provided. The hot rolled plate or austenitic steel includes a composition having in percentages by weight: 0.019%?C?0.030%, 0.5%?Mn?2%, 0.1%?Si?0.75%, Al?0.25%, 18%?Cr?25%, 14%?Ni?17%, 1.5%?Mo?3%, 0.001%?B?0.008%, 0.25%?V?0.35%, 0.23%?N?0.27%, the balance being iron and unavoidable impurities, Ni(eq.)?1.11 Cr(eq.)?8.24, Cr(eq)=Cr+Mo+1.5Si+5V+3Al+0.02, Ni(eq)=Ni+30C+x(N?0.045)+0.87; x=30 for N?0.2, x=22 for 0.2<N?0.25, x=20 for 0.25<N?0.35.

Abstract: A synthetic titanium-corundum composite includes a titanium alloy and a coherently bonded corundum phase. The titanium alloy includes at least one elemental titanium solid solution and the atomic percentage of aluminum in the titanium alloy ranges from 0.5% to 24.5%.

Abstract: PDCs, methods of fabricating the PDCs, and methods of using the PDCs are disclosed herein. The PDCs include a PCD table bonded to a substrate. The PCD table includes an upper surface having a plurality of recessed features formed therein. The plurality of recessed features are configured to attract at least some cracks that form in the PCD table. As such, the plurality of recessed features limit or prevent crack propagation into other portions of the PCD table and limit a volume of the PCD table that spalls. Methods of fabricating the PDCs include partially leaching the PCD table and, after leaching the PCD table, forming the plurality of recessed features in the upper surface thereof. Method of using the PDCs include rotating a PDC that has spalled relative to a rotary drill bit such that a portion of the upper surface of the PDC that has not spalled forms a cutting surface thereof.

Abstract: A corrosion-resistant nickel alloy, a preparation method thereof and, and a use thereof are provided. The alloy includes the following components in percentage by mass: 4.68-5.35% of B, 5.69-6.41% of W, 27.68-28.39% of Cr, 12.65-13.42% of Al, and the balance of Ni and inevitable impurities. The alloy disclosed by the present invention is a Ni—W—B ternary alloy with main components of Ni, W and B, wherein the three elements have strong high-temperature corrosion resistance at a temperature of about 600° C., and have the potential of solid solution hardening and precipitate formation because all belong to solid solution forming elements, so that a creep strength of a nickel alloy matrix is improved. Meanwhile, Al and Cr are further added in the alloy formula, so that Al2O3 and Cr2O3 oxide layers can be formed, which play a role as a physical diffusion barrier against chlorine gas and other corrosive gases.

Abstract: An additive manufacturing system, comprises an energy source device for providing a first energy beam and a second energy beam; and a forging device comprising a forging head. The first energy beam and a substrate are configured to move relative to each other to fuse at least a portion of a material added to the surface of the substrate for forming a cladding layer on the substrate. The forging head is configured to forge the cladding layer during formation of the cladding layer. The second energy beam is configured to heat a forging area of the cladding layer.

Abstract: An example composition may include a plurality of grains including an iron nitride phase. The plurality of grains may have an average grain size between about 10 nm and about 200 nm. An example technique may include treating a composition including a plurality of grains including an iron-based phase to adjust an average grain size of the plurality of grains to between about 20 nm and about 100 nm. The example technique may include nitriding the plurality of grains to form or grow an iron nitride phase.

Abstract: An aluminum alloy material includes 1.2 wt % to 3.0 wt % of Si, 0.1 wt % to 0.8 wt % of Mg, 0.2 wt % to 2.0 wt % of Cu, 0.5 wt % to 2.5 wt % of Zn, 0.2 wt % to 2.0 wt % of Ti, and the remainder being Al and inevitable impurities. The powder of the aluminum alloy material can be processed to form an aluminum alloy object. The aluminum alloy object may further include an anodized film on its surface.

Abstract: The purpose of the present invention is to provide a mold having both good adhesion resistance and smoothness, and a production method therefor. Provided is a mold made of a composite material comprising hard phases and metal phases characterized in that the mold has a reinforced layer made of hard phases for a working surface and the working surface satisfies the arithmetic average roughness Ra?0.1 ?m and skewness Rsk??0.01. Also provided is a production method for a mold made of a composite material comprising hard phases and metal phases characterized in having: a shaping step for working the surface of the mold made of said composite material and adjusting to Ra?0.1 ?m; and after the shaping step, a surface layer-modifying step for etching the surface of the mold adjusted to Ra?0.1 ?m and removing the metal phases near the surface.

Abstract: A deposition mask in which deformation of long sides is restrained is manufactured. A manufacturing method of a deposition mask includes a step of preparing a metal plate; a processing step of processing the metal plate into an intermediate product comprising: a plurality of deposition mask portions each including a pair of long sides and a pair of short sides, and having a plurality of through-holes formed therein; and a support portion that surrounds the plurality of deposition mask portions, and is partially connected to the short sides of the plurality of deposition mask portions; and a separation step of separating the deposition mask portions from the support portion to obtain the deposition mask. In the intermediate product, the long sides of the deposition mask portions are not connected to the support portion.