30results about How to "Achieve high strength" patented technology

The present invention relates to a mechanical part, which is obtained by: processing a steel into a shape of a part, the steel having an alloy composition containing, by weight percent, C: 0.10 to 0.30%, Si: 0.50 to 3.00%, Mn: 0.30 to 3.00%, P: 0.030% or less, S: 0.030% or less, Cu: 0.01 to 1.00%, Ni: 0.01 to 3.00%, Cr: 0.20 to 1.00%, Al: 0.20% or less, N: 0.05% or less, and the remainder of Fe and inevitable impurities, and the alloy composition satisfying the following condition: in which [Si %], [Ni %], [Cu %] and [Cr %] represent the concentration of Si, the concentration of Ni, the concentration of Cu and the concentration of Cr in the alloy composition, respectively; subjecting the steel to a carburizing treatment in a vacuum, followed by gradually cooling the steel; and subsequently subjecting the steel to a high-frequency hardening to thereby harden a surface of the steel.

The present invention provides a high-strength cold-rolled steel sheet having excellent deep-drawability and bake hardenability, a tensile strength of 440 MPa or greater, an average r value of 1.20 or greater, and a bake hardening value of 40 MPa or greater by a process in which a steel raw material containing, in terms of mass%, 0.010 to 0.06% C, between 0.5% and 1.5% Si, 1.0 to 3.0% Mn, 0.010 to 0.090% Nb, and 0.015 to 0.15% Ti, and having a component composition satisfying conditions of (Nb / 93) / (C / 12) < 0.20 and a solid-solution C content of 0.005 to 0.025%, is hot rolled and cold rolled, then annealed by heating from a temperature of 700 to 800 DEG C to a temperature of 800 to 900 DEG C at an average temperature increase rate of less than 3 DEG C / s, soaking, and then cooling at 5 DEG C / s or faster from the soaking temperature to a cooling stop temperature of 500 DEG C or below to obtain a formation which includes a ferrite phase having an area ratio of 70% or greater and a martensite phase having an area ratio of 3% or greater.

Microactuator, head gimbal assembly using the microactuator,method for manufacturing the head gimbal assembly, and hard disk drive are provided in the invention. The microactuator is provided with a base part bonded to a flexure, a pair of arm parts bonded to the base part, and PZT elements attached to each arm of the arm parts to be elongated / contracted based on an applied driving signal, and adapted to hold the side face of a magnetic head slider. The lengths of the arms are equal to or shorter than the longitudinal length of at least the magnetic head slider. The microactuator according to the invention is capable of achieving a structural strength while maintaining highly accurate positioning control with respect to a high recording density magnetic disk, and reducing manufacturing costs by using a conventional manufacturing process.

A constant velocity universal joint in which, despite an inner ring having a reduced wall thickness for weight reduction and size reduction, the inner ring has sufficient strength even in operation at a large operation angle and under high torque loading. The constant velocity universal joint has an outer ring (10) having, formed in its inner peripheral surface (12), axially extending track grooves (14); the inner ring (20) having, formed in its outer peripheral surface (22), axially extending track grooves (24)extending while being paired with the track grooves (14) of the outer ring (10) and also having a shaft hole (26) that has, formed in its inner peripheral surface, axially extending splines (28); balls (30) arranged between the track grooves (14) of the outer ring (10) and the track grooves (24) of the inner ring (20) and transmitting torque; and a cage (40) placed between the inner peripheral surface (12) of the outer ring (10) and the outer peripheral surface (22) of the inner ring (20) and retaining the balls (30). An axial step (25) is formed between an entrance-side end surface (23) of the inner ring (20) and a spline end section (28a) of the shaft hole (26), and a recessed end surface (27) is formed on the inward side of the entrance-side end surface (23).

Provided are a high-strength porous body and a method for producing the same. A porous body 1 has a carbon foam body 10, which is a porous material whose primary component is carbon, and a carbon film 20 formed on the surface of the carbon foam body 10, wherein the carbon film 20 comprises multiple microscopic carbon fibers 21 21..., which are fibrous nanocarbons such as carbon nanofibers, carbon nanotubes, carbon nanocoils, or carbon nanofilaments, and multiple fullerenes 22 22..., which are virtually spherical nanocarbons formed from multiple carbon atoms.

A refrigerator has a refrigerating compartment and a vegetable compartment that are convenient with respect to their spaces and positional heights, has an ice making compartment of a relatively small capacity, the ice making compartment being placed at an appropriate height to enhance use convenience, has a spacious and large freezing compartment to increase storage volume efficiency, has an aesthetically enhanced appearance with neat design providing users with an impression that the refrigerator is large and spacious, and has great strength. The refrigerator has the refrigerating compartment (6) at the uppermost part of a heat-insulated box body, the vegetable compartment (11) at the lower part of the inside of the refrigeration compartment, a cooling storage compartment (19) and the ice-making compartment (18) that are arranged next to each other while being partitioned by a vertical partition plate and are placed below the refrigeration chamber with a heat insulation partition wall (5) in between, and a drawer door type freezing compartment (22) that is located at the lowermost part of the body so as to be adjacent to both the cooling storage compartment and the ice-making compartment and extends along the entire width of the body. Thus, the inside of the body is divided into four sections.

The invention discloses a processing method for flame-retardant and anti-ultraviolet polyester outer bonded yarns. Polyester filaments are twisted into strands, and then treated in the same bath with flame-retardant and anti-ultraviolet finishing liquid and resin adhesive, and then processed under high temperature. Adhesively form a layer of transparent soft adhesive film on the surface of the strands to make a flame-retardant and anti-ultraviolet polyester outer bondy thread. The invention uses polyester filaments to make the outer bonded thread, which has the characteristics of high strength, no fluff, no continuous thread, no loose strands, high temperature resistance, no decolorization, waterproof, mildew resistance and other characteristics. The invention uses a softener to treat the polyester outer Bondi thread, endows the outer Bondi thread with a soft feel, the formula of the glue solution is reasonable, and is convenient to configure, and the performance of the Bondi thread is improved from two aspects of flame retardancy and ultraviolet resistance, and the collection resistance is realized. Combustibility, anti-ultraviolet, anti-aging, and high strength are integrated goals. The preparation process is simple and the processing process is simplified. The polyester strands are treated with finishing and gluing in the same bath, which has the advantages of water saving, energy saving, environmental protection and high efficiency.

The invention discloses a preparing method of an Al-Mg alloy automobile engine mounting bracket. The preparing method sequentially comprises the following steps of preparing a Mg-Al alloy finished product and extruding the Mg-Al alloy finished product into a bracket finished product. By increasing the Mg content and adding a proper quantity of rare earth elements, the weight of the finished product is reduced, the cooling capability is improved, and excessive materials can be repeatedly utilized without obviously reducing the properties. Through the combination of common melting, homogenizingand the like, the mechanical properties of the materials are ensured. The finished product is formed in the extruding mode, and after quenching, temperature is raised to the one before quenching, so that quenching and annealing association is higher, the strength of the material is further improved, and internal stress is smaller. The service life of the finished product is prolonged.

The present invention is a gear which has a plurality of teeth (3) and transmits rotational motion by meshing with the teeth of a counterpart gear, and the shape (b) on the root side of each tooth (3) includes a first curve (c) and the second curve (d), the first curve (c) is a curved surface smoothly connected to the tooth surface (a) of the involute curve, and passes through the tooth surface relative to the involute curve. (a) is represented by a curved line protruding in the opposite direction, the second curved line (d) is smoothly connected to the first curved surface (c), and the second curved line (d) is in the same direction with respect to the first curved surface (c). Defined by a hyperbolic function with a prominent direction. As a result, when meshing with the teeth of the counterpart gear, the stress generated on the side of the tooth root can be reduced, and the strength of the teeth can be increased.

The present invention is a gear that has a plurality of teeth (3) and transmits rotational motion by meshing with the teeth of a counterpart gear, and the shape (b) of the dedendum side of each tooth (3) includes the first curve (c) and the second curve (d), the first curve (c) is a curved surface smoothly connected to the tooth surface (a) of the involute curve, and is formed by passing through the tooth surface relative to the involute curve (a) is represented by a curve that protrudes in the opposite direction, and the second curve (d) is smoothly connected with the first curved surface (c), and is expressed in the same direction relative to the first curved surface (c). is defined by a hyperbolic function with a prominent direction. As a result, the stress generated on the dedendum side can be reduced when meshing with the teeth of the counterpart gear, and the teeth can be strengthened.

Disclosed are: a fibrous filter which can improve the strength of a photocatalyst layer; and an air purification device utilizing the fibrous filter. Titanium dioxide particles (2) are thermally sprayed onto a fibrous filter main body (1) that comprises aluminum fibers each having a diameter of 50 to 500 µm and has an areal fiber weight of 500 to 10000 g / m2 and a void ratio of 50 to 90%. In this manner, a titanium dioxide coating film containing an anatase-type crystal structure at a ratio of 70 mass% or more can be formed.

A high-strength galvanized steel sheet having a low YP, good stretch flangeability, and excellent corrosion resistance and a method for manufacturing the same are provided. The steel sheet contains, on a percent by mass basis, more than 0.015% to less than 0.10% of C, 0.5% or less of Si, 1.0% to 1.9% of Mn, 0.015% to 0.050% of P, 0.03% or less of S, 0.01% to 0.5% of sol. Al, 0.005% or less of N, less than 0.40% of Cr, 0.005% or less of B, less than 0.15% of Mo, 0.4% or less of V, and less than 0.020% of Ti, in which 2.2‰¤[Mneq]‰¤3.1 and [%Mn]+3.3[%Mo]‰¤1.9, and [%Mn]+3.3[%Mo]) / (1.3[%Cr]+8[%P]+150B*)<3.5 are satisfied. A steel has a microstructure consists of ferrite and second phases, the volume fraction of the second phase is 2% to 12%, and as the second phase, martensite having a volume fraction of 1% to 10% and retained ³ having a volume fraction of 0% to 5% are contained.

The invention provides an assembled offshore single-pile foundation construction platform. The construction platform can serve as a large single-pile foundation drilling platform or a large single-pile driving stable pile platform, and comprises a stable pile frame, a steel protection cylinder and steel pipe piles; a positioning cylinder is arranged in the center position of the stable pile frame; multiple locking oil cylinders are symmetrically embedded in the upper end and / or the lower end of the positioning cylinder in the peripheral direction; the steel protection cylinder is inserted in the positioning cylinder, and is radially positioned by the locking oil cylinders; multiple mounting sleeves are uniformly and annularly arranged at the external of the positioning cylinder; the mounting sleeves and the positioning cylinder are fixedly connected through radial trusses; the adjacent mounting sleeves are fixedly connected through peripheral trusses; and the steel pipe piles are inserted in the mounting sleeves, and are connected with the mounting sleeves through clamping keys. The construction platform is quickly assembled through a detachable mode without needing offshore welding work, and can be recycled; and more importantly, through unique structural design, the construction platform is high in stability of bearing the wave load.

A PVC (polyvinyl chloride) resin plasticization promoter is prepared from the following raw materials in percentage by weight: 20-45% of high density oxidized polyethlene wax (OPEW), 0.5-5% of an initiator (BPO), 10-25% of maleic anhydride (MAH), 1-12% of ethylene-vinyl acetate (EVA) and 30-45% of activated calcium carbonate. The PVC resin plasticization promoter is a graft, is nontoxic and harmless, has an excellent PVC resin plastification characteristic, is applied to production of the PVC wood-plastic decoration material, replaces a plasticizer, and can avoid harms and threat caused by the plasticizer to human and an environment in the prior art basically, improve the plastification processability of type 4 and 5 PVC resin and the product quality of the PVC wood-plastic decoration material, and achieve ecologicalization, harmlessness and high strength of a product; at the same time, the production cost of the product can also be lowered greatly.

The present invention provides a high-strength steel plate having excellent ductility and bendability and having a TS of 500 MPa or more, especially a high-strength thin steel plate for cans with a plate thickness ranging from 0.1 to 0.8 mm. The above-mentioned high-strength steel sheet has a composition containing C: 0.03% to 0.15%, Si: 0.01% to 0.05%, Mn: more than 0.6% to 1.5%, P: 0.025% or less, S: 0.02% or less, Al : 0.01% to 0.10%, N: 0.0005% to 0.0100%, Ti: 0.005% to 0.020%, B: 0.0005% to 0.0100%, and Nb: 0.0050% to 0.0200%, and the rest is iron and unavoidable impurities; It has a metal structure including 85% or more of ferrite and 1% to 10% of martensite in an area ratio, and the ratio of the grain size of the martensite is 5 μm or less and 2 μm or less is 80% or more.

The invention discloses a high-strength and diameter hollow poly(3-hydroxybutyrate-co-3-hydroxyvalerate) monofilament and a preparation method thereof. The monofilament is composed of: poly(3-hydroxybutyrate -co-3-hydroxyvaleric acid ester), inorganic nucleating agent and antioxidant; Its preparation method comprises: (1) blending after premixing by above-mentioned raw material makes poly(3-hydroxybutyrate-co-3- hydroxyvalerate) masterbatch; (2) take poly(3-hydroxybutyrate-co-3-hydroxyvalerate) masterbatch and polyvinyl acetate as the raw materials of cortex and core layer respectively, add to melt compounding Melt composite spinning is carried out in the hopper of the spinning equipment to obtain a skin-core structure poly(3-hydroxybutyrate-co-3-hydroxyvalerate) / polyvinyl acetate monofilament; (2) use a solvent to prepare The obtained monofilament is processed to obtain a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) monofilament. The prepared high-strength and diameter hollow monofilament has the characteristics of good mechanical properties, light weight, and hollowness, and can be used as a raw material for industrial textiles.

The invention relates to a heat treatment process for a crown casting of a large-sized hydraulic turbine. The heat treatment process for the crown casting of the large-sized hydraulic turbine comprises the following steps of heating: heating the crown from a room temperature to 250+ / -20 DEG C at a speed of 20 DEG C / h, heating the crown to 550+ / -20 DEG C, and preserving the heat of the crown at 550+ / -20 DEG C for W / 100 hours; heating the crown to 780+ / -20 DEG C at a speed of 30 DEG C / h and preserving the heat of the crown for 1.4xW / 100 hours; heating the crown to 1020+ / -10 DEG C at a speed of 50 DEG C / h and preserving the heat of the crown for 1.4xW / 100 hours; and blowing air to cool the crown to a temperature of less than 150 DEG C; and temper heat treatment: preserving the crown at 200+ / -20 DEG C for W / 100 hours; heating the crown to 400+ / -20 DEG C at a speed of 20 DEG C / h and preserving the crown for W / 100 hours; heating the crown to 600+ / -10 DEG C at a speed of 20 DEG C / h and preserving the crown for 3xW / 100 hours; and performing furnace cooling on the crown so as to cool the crown to a temperature of less than 150 DEG C at a speed of 30 DEG C / h. Through the adoption of the method, the stress of the crown in the heat treatment process is small, no crack is generated and overall performance requirements such as high strength and the like are satisfied.