39results about How to "Increase deformation resistance" patented technology

The invention discloses a preparation method of an epoxy resin / MC nylon composite material; 100 weight portions of caprolactam is taken as the reference, and the weight portions of other components are as follows: 1 portion to 50 portions of epoxy resin, 0.005 portion to 20 portions of curing agent, 0.01 portion to 5 portions of catalyst and 0.01 portion to 5 portions of activating agent; (a) under the protection of nitrogen, the epoxy resin is added into caprolactam melt to be evenly stirred; (b) the curing agent is added to pre-cure the epoxy resin under 80 DEG C to 150 DEG C; (c) the catalyst and the activating agent are added in to initiate ring opening polymerization of caprolactam anion, to obtain the epoxy resin / MC nylon composite material. The preparation method has the advantages that: 1. the method has short gelation time, high polymerization speed, high monomer conversion rate, low water absorption and the like; 2. the method improves the deformation resistance of the MC nylon substrate, so that the tensile and impact strength of the composite material are greatly improved; 3. the heat resistant performance is greatly improved; 4. the method has low production cost and simple and convenient process, and is application to industrialized production.

The invention discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises an array substrate which comprises a first substrate; a color film substrate which comprises a second substrate, a first light-transmitting hole formed in one side, facing the array substrate, of the second substrate, and a shading part surrounding the first light-transmitting hole, the shading part comprises at least one group of sub shading parts, each sub shading part comprises a first shading layer and a first connecting layer in the direction perpendicular to the plane where the second substrate is located, the first connecting layers are located on the sides, away from the second substrate, of the first shading layers, and the surface, facing the first connecting layer, of the first shading layer and the surface, facing the first shading layer, of the first connecting layer are mutually wedged; and a fingerprint recognition unit which is locatedon one side, facing the color film substrate, of the first substrate, wherein the fingerprint identification unit comprises a plurality of photosensitive devices arranged in an array, and the orthographic projection of the photosensitive devices to the plane where the second substrate is located at least partially overlaps with the orthographic projection of the first light holes to the plane where the second substrate is located. The warping phenomenon of the film layer at the first light-transmitting hole can be improved.

A friction stir welding method in which a base having a recess, and a cover for fitting into and closing the opening of the recess are prepared. A stepped portion on the inner circumferential surface of the recess at an intermediate depth allows a peripheral portion of the cover to rest thereon. A cylindrical holder portion having a cooling-medium accommodation recess is formed integrally with the outer surface of the cover. The cover is fitted into the recess and placed on the stepped portion. A cooling medium is placed in the cooling-medium accommodation recess. A friction-stir-welding tool probe is plunged into a peripheral portion of the base around an opening of the recess and into a peripheral portion of the cover. During rotation of the probe, the base, and the cover, and the probe undergo relative movement, friction-stir-welding the base and the cover together.

The invention relates to a plain-barreled roller skew rolling method, belonging to the steel rolling technical field, which aims to solve the molding rolling problem by adopting an unpunched plain-barreled roller rolling a workpiece. The invention uses continuous casting blank of square cross section as raw materials in two steps: a plain-barreled roller skew rolling step and a diamond-square hole rolling step. The invention adopts unpunched plain-barreled rolling in the step of the plain-barreled rolling; the skew degree of the workpiece is produced by controlling press distance and using inclined guide device through 4 to 8 pass rolling; the workpiece obtains a diamond-shaped cross section as the incremental skew degree. Then the diamond-square hole rolling step adopts diagonal square hole, diamond-shaped hole and diagonal square hole in sequence through three pass rolling, obtaining a workpiece of regular square cross section. The invention has the advantages that: the designing idea is quite the reverse of the present plain-barreled roller rolling method, skillfully utilizes the skew degree of the workpiece produced by the plain-barreled rolling and enables the workpiece to form a diamond-shaped cross section; then go to the diamond-square hole rolling step to produce the square steel. The invention resolves the difficult problem of the workpiece distortion and turnover in prior plain roller forming process.

The invention discloses a method for preparing a nylon composite modified by an in-situ polymerization carbon nanotube.According to the method, an MWCNTs-NH2 is prepared from the carbon nanotube, then a reaction with nylon salt is conducted, and the ammoniation multi-walled carbon nanotube composite is obtained.Compared with the prior art, the friction and wear performance, tensile strength and stability of the prepared composite are all greatly improved.

The invention discloses a method for preparing a nylon composite modified by an in-situ polymerization carbon nanotube.According to the method, an MWCNTs-NH2 is prepared from the carbon nanotube, then a reaction with nylon salt is conducted, and the ammoniation multi-walled carbon nanotube composite is obtained.Compared with the prior art, the friction and wear performance, tensile strength and stability of the prepared composite are all greatly improved.

This invention provides a case-hardening steel excellent in cold forgeability and low carburization distortion property that exhibits low deformation resistance and high limit compressibility when cold, namely, a case-hardening steel excellent in cold forgeability and low carburization distortion property comprising, in mass %, C: 0.07% to 0.3%, Si: 0.01% to 0.15%, Mn: 0.1% to 0.7%, P: 0.03% or less, S: 0.002% to 0.10%, Al: 0.01% to 0.08%, Cr: 0.7% to 1.5%, Ti: 0.01% to 0.15%, B: 0.0005% to 0.005%, N: 0.008% or less, and the balance of Fe and unavoidable impurities, and having a metallographic structure comprising 65% or greater of ferrite and 15% or less of bainite.

A profile clamp is disclosed having an annular clamping band that comprises two circumferential ends having respectively one tensioning head (6) and, at its axial ends, flanks sloped radially inwards, wherein the tensioning heads (6) are connected to one another by a tensioning device and at least one tensioning head (6) comprises a head contact tab (10). The object is to reduce the requirements for precision during installation. For this purpose, it is provided that the head contact tab (10) projects past the tensioning head (6) on at least one side in an axial direction.

The universal closure device (1) has a shaft part (6) with end regions, where the shaft part is extended in direction of a longitudinal axis (5) and the end regions are provided at a distance from each other in direction of the longitudinal axis. A supporting element (31) is arranged between a sealing element (12,16) and an outer surface (9) of the shaft part.

The invention discloses a shock-preventive solar energy module capable of effectively preventing a side frame oxide film from cracking. The shock-preventive solar energy module capable of effectively preventing the side frame oxide film from cracking comprises a side frame used for the solar energy module, wherein the side frame is manufactured from an aluminum alloy material; the aluminum alloy material comprises the following components in percentage by mass: 0.001 to 0.004% of C, 13.3 to 13.5% of Si, 0.21 to 0.23% of Fe, 0.12 to 0.14% of Cu, 0.11 to 0.13% of Zr, 0.02 to 0.04% of Ti, 0.001 to 0.002% of Ca, 0.003 to 0.005% of Hg, 0.13 to 0.15% of Pt, 0.22 to 0.24% of Pb, 0.01 to 0.03% of Cr, 0.42 to 0.46% of rare earth, 0.24 to 0.28% of assistant, and the balance Al.

A device for supporting two constructional elements against each other consisting of at least one upset tube arranged between pressure transmitting plates located at the ends of the tube for the purpose of limiting inward and outward bulging. The upset tube is coaxially arranged between two supporting tubes having a smaller length than the upset tube of which the external supporting tube encloses the upset tube at a radial distance.

A self-locking belt retractor for a seat belt device of a motor vehicle with a belt shaft body and a profile head, and a blocking device with a blocking catch mounted on the profile head. When activated, the blocking device engages in a blocked position with a vehicle-affixed interlock for the purpose of blocking the belt shaft in the belt extension direction. A force-limiting device is disposed in the force transmission path from the belt shaft body to the blocking catch. The profile head is made as two parts, with a carrier component and an insert component which are affixed together. The insert component exhibits a higher resistance to deformation than the carrier component and, when the belt shaft is blocked, forms part of the force transmission path between the blocking catch and the force-limiting device.

The invention relates to a flat roll off-square rolling method, which belongs to the technical field of steel rolling and is used to solve the problem of forming and rolling a rolled piece by using a non-perforated flat roll. It uses square section continuous casting slabs as raw materials, and consists of two steps: flat roll off-square rolling and diamond-square pass rolling. Measure and use the inclined guide device to make the rolled piece produce off-square amount. After 4 to 8 passes of rolling, the rolled piece forms a diamond-shaped section with the increase of off-square amount, and then enters the diamond-square pass rolling step. The pass rolling step adopts three passes of diagonal square pass, rhombus pass and diagonal square pass successively to obtain a rolled piece with regular square section. The design concept of the present invention is reversed from the existing flat roll rolling method, cleverly utilizing the off-square of the rolled piece in the flat roll rolling, so that the rolled piece forms a diamond-shaped section, and then enters the diamond-square pass to roll out square steel . The method successfully solves the problem of crooked and inverted steel in the rolled piece in the existing flat roll forming rolling technology.

The present invention relates to an energy absorption device (1) for a bumper arrangement of a vehicle, with a hollow longitudinal section (2) intended for deformation, a rolled-back region (3) adjoining the hollow longitudinal section, and an extension section (4) connected to the rolled-back region. In order to improve an energy absorption device of this type to the extent that obliquely actingaccident forces can be absorbed with a high degree of efficiency in as simple a manner as possible, it is proposed, in an initial state prior to energy absorption, to orient the hollow longitudinal section (2) obliquely with respect to the axial direction of the extension section (4).

The invention discloses a high-strength corrosion-resistant brass material and a preparation method thereof. The brass material is prepared from the following components in percentage by mass: 60.9-64.2 percent of Cu, 0.85-1.3 percent of Si, 0.13-0.21 percent of Fe, 1.69-1.97 percent of Al, 0.71-1.58 percent of Ni, 0.1- 0.27 percent of Sn, 0.07-0.26 percent of Nd, 0.01-0.065 percent of Os, 0.03-0.12 percent of Ti, 1.1-2.25 percent of Mn, 0.01-0.07 percent of B and the balance of Zn and inevitable impurities. The preparation method for the high-strength corrosion-resistant brass material is simple in process, and the obtained brass material is high in strength and hardness, good in corrosion resistance and long in service life.

The invention discloses a preparation method of an erosive wear resistant iron-based composite coating. The method is characterized in that a non-melting argon tungsten-arc welding device and a supersonic arc spray painting device are utilized; the erosive wear resistant iron-based composite coating is prepared on the surface of a base material by first treatment of the surface of the base material, dividing of grids, preparing of a net-shaped cladding layer, secondary treatment of the surface of the base material, preparation of the composite coating, and other technological steps. The composite coating is high in capacity of combining with the base material, is high in density and oxidation resistance, and can bear high impact load, so that the base material can be protected; the composite coating can be used in severe environments such as high temperature environment or hot corrosion environment, and thus the service life of the base material can be prolonged.