57results about How to "Guaranteed fatigue resistance" patented technology

The invention discloses a method for manufacturing glued laminated bamboo floors. The bamboo is applied to containers, so the consumption of wood resources in inland container floors is reduced, the use requirement of the container floors is better met, and the manufacturing cost of the container floors is reduced; meanwhile, an intermittent continuous production method is adopted, so the method for manufacturing the glued laminated bamboo floors can produce various specifications of inland container floors, and better meets the requirements on the strength and fatigue resistance of the inland container floors.

The invention discloses an aluminum matrix composite plate rolling method and belongs to the field of metal matrix composite molding machining. According to the method, on the basis that the density of a composite billet used for rolling is regulated, a plate blank is manufactured through multidirectional free forging and extruding, and the thickness of a rolled plate is 1-150 mm; sectional temperature rolling is adopted, cogging and reversing rolling are both conducted in a recrystallization temperature region so as to avoid detects generated in subsequent rolling, the rest of passes are subjected to large deformation rolling at a dynamic recovery temperature, and the rolling efficiency is improved; the regions of the rolling temperature and the rolling speed are narrowed so that organization can be precisely controlled and detects can be avoided; and medium and low temperature finish rolling is adopted so as to ensure the plate performance. In this way, the manufactured aluminum matrix composite plate has high strength and good corrosion resistance and fatigue resistance, and efficient rolling of large-size plates can be achieved.

The invention discloses a preparing method of a titanium fire resistance coating. A continuous strip-shaped Ti-37.5Zr-15Cu-10Ni base amorphous alloy is selected to serve as brazing filler metal, CBN particles are selected as hard wear-resisting particles, strip-shaped brazing filler metal is placed on the blade tip in advance, and wraps the blade tip required to be coated with the titanium fire resistance coating, an organic bonding agent is used for being mixed with Ni-plated CBN particles, and the brazing filler metal is evenly coated with the bonding agent; in the vacuum environment, a medium-frequency induction coil is used for locally heating a rotor blade tip, the heating temperature is kept between 840 DEG C to 850 DEG C and is kept for a certain time, the brazing filler metal can be completely molten, the brazing filler metal is naturally cooled in the high-vacuum environment, and the titanium fire resistance coating is formed; and the titanium fire resistance coating obtained through the preparing method of the titanium fire resistance coating has high hardness, high wear resistance, high impact resistance, high temperature oxidability resistance, high fire resistance and high combination strength, meanwhile, the property of the base body cannot be affected, and the base body anti-fatigue property is ensured.

Fatigue properties required of drive shafts cannot be always guaranteed with conventional electric-resistance-welded steel pipes. Disclosed is an electric-resistance-welded steel pipe which comprises a base metal having a composition containing 0.25-0.55% C, 0.01-1.0% Si, 0.2-3.0% Mn, up to 0.1% Al, and 0.0010-0.0100% N, with the remainder comprising Fe and incidental impurities. The steel pipe is characterized in that the area of weld defects which is the area of weld defects projected on the weld formed by electric-resistance welding is less than 40,000 [mu]m2.

The invention discloses high-strength open-cell micro-porous plastic as well as a preparation method and application thereof. The preparation method comprises the following steps: rapidly mixing 14-20 percent by weight of vinyl monomer, 0.3-1.0 percent by weight of an oxidation-reduction initiator, 45-65 percent by weight of organic polymer solid powder, 0.1-0.8 percent by weight of emulsifier and 20-40 percent by weight of water uniformly at the temperature of 1-15 DEG C; rapidly adding into a mold for curing to obtain the high-strength open-cell micro-porous plastic. The yield compressive strength of the high-strength open-cell micro-porous plastic is more than 26MPa, the bending strength is more than 13MPa, and the water absorption is more than 20 percent. The high-strength open-cell micro-porous plastic has remarkable air permeability and water permeability, and can be used repeatedly. The preparation method is simple and convenient in process, can be cured and molded quickly at room temperature or in a way of heating slightly, is easy for industrial production, can be taken as a filter material, and has a wide application prospect.

The invention belongs to the field of tunnel fireproof doors, and particularly discloses a composite tunnel fireproof door, a fireproof door system and a preparation method. The composite tunnel fireproof door is of a three-layer composite structure composed in the mode that a fireproof layer is sandwiched between two composite surface layers. The fireproof layer is made of a fireproof heat-resistant material, and the composite surface layers are made of high-strength corrosion-resistant materials. The fireproof door system comprises a door frame and the fireproof door mounted in the door frame, and the fireproof door is mounted in a tunnel doorway through the door frame. The preparation method comprises the steps that the fireproof layer is prepared, and a resin solution is prepared; theresin solution is smeared on the two surfaces of the fireproof layer to prepare fireproof layer prepreg; glass fibers are soaked in the resin solution and then dried to prepare prepreg; the prepreg issuperimposed on the two surfaces of the fireproof layer prepreg and then preheated and subjected to heat preservation to obtain a raw material plate; and the raw material plate is hot-pressed to prepare the composite tunnel fireproof door. The requirements of explosion resistance, wind pressure resistance, fatigue resistance and corrosion resistance are met while the fireproof performance is achieved.

The invention discloses a titanium fire resistance coating. A continuous strip-shaped Ti-37.5Zr-15Cu-10Ni base amorphous alloy is selected to serve as brazing filler metal, CBN particles are selected as hard wear-resisting particles, strip-shaped brazing filler metal is placed on the blade tip in advance, and wraps the blade tip required to be coated with the titanium fire resistance coating, an organic bonding agent is used for being mixed with Ni-plated CBN particles, and the brazing filler metal is evenly coated with the bonding agent; in the vacuum environment, a medium-frequency induction coil is used for locally heating a rotor blade tip, the heating temperature is kept between 840 DEG C to 850 DEG C and is kept for a certain time, the brazing filler metal is completely molten, the brazing filler metal is naturally cooled in the high-vacuum environment, and the titanium fire resistance coating is formed; and the titanium fire resistance coating obtained through the preparing method of the titanium fire resistance coating has high hardness, high wear resistance, high impact resistance, high temperature oxidability resistance, high fire resistance and high combination strength, meanwhile, the property of the base body cannot be affected, and the base body anti-fatigue property is ensured.

The invention discloses a full-thickness ultrathin long-service-life pavement structure and a construction method thereof. According to the method, a pavement structure layer with different functions is prepared by matching a polyurethane material with different mineral aggregates, and the full-thickness ultrathin long-service-life pavement structure is synthesized according to the functional difference of the structure layer; the pavement structure is good in overall stability, high in interlayer bonding strength, high in fatigue load resistance, small in structural layer number and small in structural layer thickness, and the service life of the pavement structure can be effectively prolonged.

The invention provides a forging integrated type oiling strain clamp for an aluminum alloy stranded wire. A strain clamp is arranged on an overhead transmission line terminal and is used for anchoring a wire and keeping the electric and mechanical properties of the wire; the strain clamp is characterized in that the strain clamp comprises a pull ring, a connecting pipe and a drainage wire clamp; the connecting pipe and the pull ring are integrally formed along an axial direction; a fixing component and a pulling pin are respectively arranged on the inner wall and the outer wall at one end of the connecting pipe; an oiling hole is arranged in the side wall of the connecting pipe at a joint of the connecting pipe and the pull ring. Compared with the prior art, the forging integrated type oiling strain clamp for the aluminum alloy stranded wire provided by the invention has the advantages that the strain clamp is prevented from being damaged by inner frozen accumulated water, the strength of the strain clamp is increased, the holding capability of the strain clamp for the wire is increased, and a mature crimping technique is adopted so that the crimping quality is excellently ensured.

The invention belongs to the field of vehicle engineering, and discloses a racing car decoupling type longitudinal inclination and lateral inclination adjusting device. The device comprises a first rocker arm shaft, a second rocker arm shaft, a reversing mechanism, a first push rod, a second push rod, a longitudinal inclination restraining shock absorber, a lateral inclination restraining shock absorber, a first support, a second support, a third support and a fourth support, wherein the first rocker arm shaft is provided with a first lateral inclination shock absorber lifting lug, a first longitudinal inclination shock absorber lifting lug and a first push rod lifting lug, the second rocker arm shaft is provided with a second lateral inclination shock absorber lifting lug, a second longitudinal inclination shock absorber lifting lug and a second push rod lifting lug, the longitudinal inclination restraining shock absorber is provided with a longitudinal inclination restraining spring,and the lateral inclination restraining shock absorber is provided with a lateral inclination restraining spring; and the reversing mechanism comprises a first guide piece, a second guide piece, a first fixing frame and a second fixing frame. Accurate control over the posture of a vehicle body is achieved, longitudinal inclination adjustment and lateral inclination adjustment are independent anddecoupled from each other, the operation stability and smoothness of the racing car are improved, accurate adjustment of a racing car suspension is achieved, and the overall performance of a suspension system is improved.

The invention discloses a hot-rolled steel plate for an ocean riser with low cost and high performance and a production method thereof. The chemical components of the steel plate comprise C 0.04-0.10%, Si 0.10-0.35%, Mn 1.55-1.85%, Nb 0.02-0.08%, Ti 0.008-0.020%, Al 0.010-0.040%, P less than or equal to 0.020%, S less than or equal to 0.003%, Mo less than 0.20%, Cu less than or equal to 0.25%, Ni less than or equal to 0.30%, Cr less than or equal to 0.25%, N less than or equal to 0.008%, and the balance being Fe and unavoidable impurities, wherein Al / N is greater than or equal to 3, Ni+Cu+Mo+Cr is less than or equal to 0.70%, Nb+Ti is less than or equal to 0.09%, and Ti / N is equal to 2.5-5. CEIIW is 0.40-0.45%, CEPCM is 0.16-0.21%, casting blank heating temperature is 1,160-1,230 DEG C, four-stage heating is adopted, rough rolling temperature is 980-1,120 DEG C, fine rolling temperature is 790-900 DEG C, cooling temperature after rolling is 750-800 DEG C, cooling speed is 5-35 DEG C / s, and final cooling temperature is 430-520 DEG C. The steel plate of the invention has yield strength above 555 MPa, endwise tensile strength above 630 MPa, good cracking resistance, corrosion resistance and fatigue resistance, good comprehensive property, and low cost.

The invention relates to a high-speed rail bogie integral force bearing structure adopting a three-dimensional woven composite material, and an application thereof. The high-speed rail bogie integralforce bearing structure comprises a front side plate, a rear side plate and a middle cross beam. The structure is characterized in that the front side plate, the rear side plate and the middle cross beam are integrally formed by the hybrid fiber three-dimensional woven composite material, wherein the front side plate and the rear side plate adopt variable-thickness V-shaped structural design, endinstallation bases for installing springs are arranged at the two ends of the front side plate and the rear side plate, middle installation bases for installing the springs are arranged in the middlesof the front side plate and the rear side plate, the end installation bases and the middle installation bases are designed to be of a special transition type three-dimensional woven composite transition structure, and metal reinforcing parts are embedded in the end installation bases and the middle installation bases. A barrier plate is designed in the middle of the middle cross beam and is reinforced by the pre-embedded metal parts, so that the overall anti-fatigue performance of the bearing structure is guaranteed, and the structural strength and the integrity of the connecting process of the bearing structure and other parts are guaranteed.

The invention discloses a method for manufacturing glued laminated bamboo floors. The bamboo is applied to containers, so the consumption of wood resources in inland container floors is reduced, the use requirement of the container floors is better met, and the manufacturing cost of the container floors is reduced; meanwhile, an intermittent continuous production method is adopted, so the method for manufacturing the glued laminated bamboo floors can produce various specifications of inland container floors, and better meets the requirements on the strength and fatigue resistance of the inland container floors.

The invention discloses a wear-proof anti-ageing heat reserving brick and a preparation method thereof, and relates to the technical field of heat reserving bricks. The heat reserving brick is prepared from the following raw materials: 85-95 parts of portland cement, 25-35 parts of modified carbon fiber, 15-17 parts of modified coal ash, 12-13 parts of mixed fiber, 7-9 parts of modified perlite, 14-16 parts of auxiliary agent and 95-105 parts of water. The preparation method of the wear-proof anti-ageing heat reserving brick comprises the following steps: (1) mixing the raw materials; (2) pressing forming and the like. The wear-proof anti-ageing heat reserving brick has good wear-proof performance and anti-ageing performance.

The invention provides a forged integrated strain clamp applied to an aluminum alloy stranded conductor. The strain clamp is arranged at the end of an overhead transmission line and used for anchoring a conductor as well as maintaining the electrical and mechanical performances. The device is characterized in that the strain clamp comprises a pulling ring, a connecting tube and a flow guide clamp; the connecting tube and the pulling ring are axially integrally formed; a fixing part and a drawing pin are respectively arranged on the inner wall and the outer wall of one end of the connecting tube. Compared with the prior art, the forged integrated strain clamp applied to aluminum alloy stranded conductor has the advantages that the intensity of the strain clamp is improved; in addition, the holding capacity of the strain clamp to the conductor is improved; meanwhile, the sealing performance of a cavity formed by the strain clamp and the conductor after pressure welding is improved; the matured pressure welding process is adopted, so that the pressure welding quality can be ensured well.