30results about How to "Yield strength" patented technology

A wound field synchronous machine includes direct oil cooling along a conductive sleeve with elongated semi-arcuate shaped channels which alternate with damper bar channels containing tie-rod supports structures. With a reduction in sleeve thickness permitted by the direct cooling, the overall weight of the machine is reduced.

A hot-rolled austenitic manganese steel strip having a chemical composition in percent by weight of 0.4%≦C≦1.2%, 12.0%≦Mn≦25.0%, P≧0.01% and Al≦0.05% has a product of elongation at break in % and tensile strength in MPa of above 65,000 MPa %, in particular above 70,000 MPa %. A cold-rolled austenitic manganese steel strip having the same chemical composition achieves a product of elongation at break in % and tensile strength in MPa of above 75,000 MPa %, in particular above 80,000 MPa %.

The present invention provides steel containing manganese and nickel that is used as a structural material for a cryogenic storage container for liquefied natural gas (LNG) or the like, and a manufacturing method thereof; and more particularly, to steel having good cryogenic temperature toughness and also high strength by adding low-cost Mn instead of relatively expensive Ni at an optimized ratio, refining a microstructure through controlled rolling and cooling, and precipitating retained austenite through tempering, and a manufacturing method of the steel. To achieve the object, the technical feature of the present invention is a method of manufacturing high-strength steel with cryogenic temperature toughness. In the method, a steel slab is heated to a temperature within a range of 1,000 to 1,250° C., wherein the steel slab includes, by weight: 0.01-0.06% of carbon (C), 2.0-8.0% of manganese (Mn), 0.01-6.0% of nickel (Ni), 0.02-0.6% of molybdenum (Mo), 0.03-0.5% of silicon (Si), 0.003-0.05% of aluminum (Al), 0.0015-0.01% of nitrogen (N), 0.02% or less of phosphorous (P), 0.01% or less of sulfur (S), with a remainder of iron (Fe) and other unavoidable impurities. Then, the heated slab is finish-rolled at a temperature of 950° C. or less at a rolling reduction rate of 40% or more. The rolled steel is cooled to a temperature of 400° C. or less at a cooling rate of 2° C./s or more. Thereafter, the steel is tempered for 0.5-4 hours to a temperature within a range of 550 to 650° C. after the cooling.

A nickel based alloy is provided which includes, in weight percentage,carbon from about 2 to about 3;chromium from about 30 to about 40;tungsten from about 12 to about 18;iron from about 3.5 to about 8.5;molybdenum from about 1 to about 8;manganese up to about 0.5;silicon up to about 1.0; andthe balance nickel and incidental impurities. The alloy is useful for internal combustion engine valve seat inserts and the like.

A three-axis acceleration sensor having a simple construction is provided for improving shock resistance without lowering sensor sensitivity.

An acceleration sensor for detecting acceleration in three orthogonal directions includes an electrode substrate (5) having fixed electrodes corresponding to three axes, respectively, a diaphragm (2) having one surface thereof opposed to the fixed electrodes acting as a movable electrode, and a weight (1) mounted centrally of the other surface of the diaphragm.

Acceleration is detected based on variations in capacitance between the fixed electrodes and diaphragm (2).

The electrode substrate (5) has an electret layer (4) formed to cover surfaces of the fixed electrodes.

A three-axis acceleration sensor having a simple construction is provided for improving shock resistance without lowering sensor sensitivity.

An acceleration sensor for detecting acceleration in three orthogonal directions comprises an electrode substrate pair including electrode substrates (4) opposed to each other, and each having fixed electrodes (4c, 4b, 4a) corresponding to three axes, respectively, a diaphragm (2) acting as a movable electrode, and an umbrella-like weight (3) mounted centrally of the diaphragm (2).

Acceleration is detected based on variations in capacitance between the fixed electrodes (4c, 4b, 4a) and diaphragm (2).

Each electrode substrate (4) has an electret layer (1) formed to cover surfaces of the fixed electrodes (4c, 4b, 4a). At least one of the electrode substrates defines, centrally thereof, a through hole (7). A shaft portion of the umbrella-like weight (3) extends through the through hole (7) from outside, and is connected to the diaphragm (2).

A nickel based alloy composition including, by atomic per cent, between 12 and 15% of elements from the group of aluminium, titanium, tantalum and niobium, between 0.8 and 1.8% tungsten, between 5 and 8% aluminium, at least 28% of elements from the group of molybdenum, tungsten, chromium and cobalt, wherein the atomic ratio of the sum of titanium, tantalum and niobium to aluminium is between 0.6 and 1.1, and wherein the composition includes less than 1.5% molybdenum, the balance being nickel save for incidental impurities.

A Cu—Ni—Co—Si based copper alloy sheet material has second phase particles existing in a matrix, with a number density of ultrafine second phase particles is 1.0×10⁹ number/mm² or more. A number density of fine second phase particles is not more than 5.0×10⁷ number/mm². A number density of coarse second phase particles is 1.0×10⁵ number/mm² or more and not more than 1.0×10⁶ number/mm². The material has crystal orientation satisfying the following equation (1):

I{200}/I₀{200}≧3.0  (1)

wherein I{200} represents an integrated intensity of an X-ray diffraction peak of the {200} crystal plane on the sheet material sheet surface; and I₀{200} represents an integrated intensity of an X-ray diffraction peak of the {200} crystal plane in a pure copper standard powder sample.

A method for performing a hydroforming operation on a hollow workpiece includes the initial step of filling the interior of the workpiece with a hydroforming fluid. The pressure exerted by the hydroforming fluid against the interior of the workpiece is below the yield strength of the workpiece so as to not change the shape of the workpiece. Then, first and second die sections of the hydroforming apparatus are closed about the workpiece. The movement of the two die sections causes some mechanical deformation of the workpiece, but the presence of the hydroforming fluid within the workpiece prevents the amount of this mechanical deformation of the hollow workpiece from being undesirably large. Thereafter, the pressure exerted by the hydroforming fluid against the interior of the workpiece is increased to above the yield strength of the workpiece. As a result, the workpiece is deformed into engagement with the first and second die sections of the hydroforming die.

A fixing structure 40 has an inwardly-facing seat 22, a front side seat 42, and fixing members 44. The inwardly-facing seat 22 is fixed to a floor portion 14 such that passengers PA face in a vehicle transverse direction. The front side seat 42 has a seat cushion 46 on which the passenger PA sits, and a supporting member 52, and is disposed at the floor portion 14 at a vehicle longitudinal direction front side of the inwardly-facing seat 22, and rear wheels 36 can contact the seat cushion 46 in a vehicle longitudinal direction. The supporting member 52 supports the seat cushion 46 such that the seat cushion 46 can rotate toward the inwardly-facing seat 22. The fixing members 44 fix a wheelchair 30 to the floor portion 14 in a state in which the rear wheels 36 are made to contact the front side seat 42.

A water sensor and activation assembly including a paper element to sense the presence of water leaks from appliances such as clothes washing machines, refrigerator ice makers and the like, and to cause an associated water shutoff valve to turn off the source of water leakage. The water sensor, in conjunction with the shutoff valve, operates without any electrical power requirement. The design allows the water sensor to operate in a high humidity environment.

Provided is a tempered martensitic steel having a low yield ratio and an excellent uniform elongation, the tempered martensitic steel: comprising, by wt %, 0.2-0.6% of C, 0.01-2.2% of Si, 0.5-3.0% of Mn, 0.015% or less of P, 0.005% or less of S, 0.01-0.1% of Al, 0.01-0.1% of Ti, 0.05-0.5% of Cr, 0.0005-0.005% of B, 0.05-0.5% of Mo, 0.01% or less of N, and the balance of Fe and inevitable impurities; having a yield ratio of 0.4-0.6; having a product (TS*U-El), of a tensile strength and a uniform elongation, of 10,000 MPa % or more; and having a microstructure containing, by an area fraction, 90% or more of tempered martensite, 5% or less of ferrite and the balance of bainite.

A splicing device (10) for closing a looped material band (1) comprising two splicing elements (20, 30) intimately linked to the ends (2, 3) of the material band (1), assembled together by fitting two toothings (22, 23) into each other, and locked by a transverse locking rod (15) inserted in the aligned transverse openings (14) of the teeth (13) of each toothing. The splicing elements (20, 30) are made out of a material compatible with that of the material band and comprise a traction core extending longitudinally up to the teeth (13) and surrounding the transverse opening (14) of teeth (13) of each toothing (22, 32) so that, when the splicing device (10) is assembled and locked, the traction cores of the splicing elements ensure the tensile strength of the splicing device (10) while remaining very flexible.

The present application discloses a low-pressure casting secondary pressure process for an aluminum wheel. The characteristics of smooth low-pressure filling of molten aluminum alloy and rapid solidification of a rim are preserved, the aluminum alloy at a center sprue is frozen by using a center sprue spreader and a forced water coolling to close a mold cavity, and secondary pressure is implemented to the aluminum wheel by means of down-movement of center extrusion rods, so that the material mechanical properties of an aluminum wheel casting and the production efficiency of the casting process are improved.

Ductwork (1) for arranging at least one pipe through an opening (2) in a partitioning (3), including a flange (4) having an outer periphery area (5) and a central area (7) which is formed with a guide opening (8) for every pipe, the flange (4) being provided with a number of mounting apertures (11), the flange (4) having an inner side (9) and an outer side (10) opposite the inner side (9), where the inner side (9) is adapted for bearing against one side (6) of the partitioning, wherein the ductwork (1) further includes a connecting arrangement mounted in each mounting aperture (13), the connecting arrangement including force transmission means (15) with an operating member (22) disposed over the outer side (10) of the flange, and with a shank (17) extending through the mounting aperture (11), a clamping means (23) disposed on the shank (17) of the force transmission means and which is displaceable around and/or along the shank (17) by actuating the operating member (22), and an engagement arrangement (19) disposed between the inner side (9) of the flange and the clamping means (23), and which is adapted with contact surfaces (23) interacting with contact surfaces (18) on the clamping means (23), and engaging faces (20) that may be displaced radially relative to the orientation of the shank by actuating the operating member (22).