45results about How to "Meet toughness requirements" patented technology

The invention discloses an X80 large-diameter thick-wall longitudinal submerged arc welding pipe applicable to the low temperature and a manufacturing method thereof. A parent material of the weldingpipe comprises, by mass percentage, 0.04-0.08% of C, 0.15-0.30% of Si, 1.60-1.85% of Mn, less than or equal to 0.004% of S, less than or equal to 0.010% of P, 0.15-0.30% of Ni, 0-0.30% of Cr, 0.1-0.3%of Cu, 0.05-0.10% of Nb, 0.005-0.04% of V, 0.015-0.03% of Ti, 0.10-0.35% of Mo, 0.02-0.05% of Al, less than or equal to 0.008% of N and 0.0003-0.0005% of B. The manufacturing method comprises the steps of preparing a hot rolled steel plate according to the mass percentages of the chemical compositions; and conducting ultrasonic inspection, edge milling, pre-flanging, JCO formation, prewelding, inner welding, outer welding, welding seam X-ray inspection, steel pipe expanding, hydrostatic testing, welding seam ultrasonic testing, pipe end X-ray inspection, chamfering, pipe end magnetic particletesting and appearance quality inspection on the steel plate. A welding joint of the welding pipe is good in low-temperature toughness; and on the premise that heat treatment is not conducted on thewelding pipe after pipe manufacturing, the welding pipe can be directly used at the temperature of minus 45 DEG C or even lower.

The invention discloses a method for manufacturing high-strength plate Q960 produced by a coil rolling mill. In terms of smelting technology, converter steelmaking is adopted, and top-lower compound blowing is used for deep decarburization; RH vacuum treatment is used for further decarburization and microalloying. Obtain a steel billet that meets the requirements; the chemical composition weight percentage of the steel billet is: C0.12~0.20%, Mn0.80~1.60%, Si0.02~0.40, P≤0.015, S≤0.005, B0.001~0.003, and add Appropriate amount of Cr, Mo, V, Ni alloy elements, and satisfy carbon equivalent Ceq=+Mn/6+Cr/5+Mo/4+V/14+Ni/40+Si/24≤0.60; in terms of rolling process , controlled rolling is carried out by a steckel rolling mill, and the heating temperature of the steel billet before rolling is 1150-1250 °C; the invention has the characteristics of low carbon equivalent, excellent low-temperature toughness, smooth plate shape, and good welding performance, and is suitable for construction machinery, mining equipment, ports, etc. Machinery and other fields.

The invention discloses a processing method for a steel tube. The processing method comprises the following steps of: carrying out inner wall quenching on the steel tube to enable the steel tube to integrally form a martensite structure; carrying out medium-temperature tempering on the outer wall of the steel tube, which is processed by an inner wall quenching process, to enable the outer wall toform a tempered troostite structure; and meanwhile, carrying out low-temperature tempering on the inner wall to enable the inner wall and part of adjacent outer wall to form a tempered martensite structure. Therefore, the inner wall of the processed steel tube has higher hardness and wear resistant; the outer wall of the processed steel tube has higher toughness; and the processed steel tube can completely meet the requirements of wear resistance and toughness. The invention also discloses processing equipment for the steel tube. The processing equipment comprises a clamper for clamping the steel tube, an inner wall quenching device of a quenching sensor as well as an outer wall tempering device of a tempering sensor, wherein the inner wall quenching device can be moved inside the steel tube; and the outer wall tempering device can be moved on the outer wall of the steel tube. The processing equipment can be used for simultaneously finishing the inner wall quenching process and the outer wall tempering process and has high processing efficiency. The invention further provides the steel tube obtained by the processing method and the processing equipment disclosed by the invention.

The invention belongs to the field of materials and discloses a powder coating capable of forming a high-toughness coating. The powder coating comprises polyester resin, a curing agent, a filler, a toughening agent and an auxiliary agent, wherein the toughening agent is at least one selected from epoxy resin modified polyamideimide, and nylon or thermoplastic elastomers. The powder coating provided by the method can be used to prepare a coating by spraying and curing. Polyester resin and the curing agent are used as a film forming system, so that the reaction cross-linking density is proper, and the formed coating has large deformation resistance. The toughening agent is added to further improve toughness of the coating, so that the coating still has good toughness even if the coating reaches 130-180 microns, and requirements of parts on toughness of the coating in a stamping forming process can be met. Thickness of the high-toughness coating formed by the powder coating is 130 micronsor above, and the coating has good weather resistance.

The invention provides a high-aluminum-content fine-grain low-density full-high-temperature ferrite medium-thickness plate for an ocean platform and a preparation method for the high-aluminum-contentfine-grain low-density full-high-temperature ferrite medium-thickness plate. The steel is prepared from the following chemical components in percentage by mass: 0.01-0.039 percent of C, 4.01-6.00 percent of Al, 0.01-1.40 percent of Mn, 0.01-2.00 percent of Cr, 0.002-0.003 percent of B, 0.02-0.06 percent of Ti, 0.01-0.39 percent of Ni, less than or equal to 0.007 percent of Nb, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S and the balance of Fe and other inevitable impurities. For the high-aluminum-content fine-grain low-density full-high-temperature ferritemedium-thickness plate and preparation method thereof, by controlling the components and a structure, the corrosion resistance in a marine atmospheric environment is better than that of currently commonly used weathering steel Corten-A by 70 percent or above, and the average grain size of the steel is refined to 50 microns or below.

The invention discloses large-aggregate mixed steel fiber second-level matched concrete and a preparation method. The concrete comprises a cementing material, steel fibers, coarse aggregate, fine aggregate and water, the steel fibers are different in length, and second-level matched coarse aggregate are adopted as the coarse aggregate; the preparation method comprises the following steps that 1, cement, steel fibers, coarse aggregate, fine aggregate and water are obtained according to a proportion, the steel fibers with the length of 60 mm are placed in the weighed water, dispersed and taken out; 3, the weighed coarse aggregate, fine aggregate and cement are stirred for 1 minute, two kinds of steel fibers different in length are added to the mixture during stirring, the weighed water is added to the mixture after even stirring, stirring continues for 1 minute, and the large-aggregate mixed steel fiber second-level matched concrete is obtained. The preparation method is simple, and theprepared second-level matched concrete has high strength and toughness.

The invention provides a high-toughness polyethylene mixed material for an electrolytic cathode plate sealing strip and a preparation method for the high-toughness polyethylene mixed material and belongs to the field of plastic process application and the field of wet electrolytic technology for metal such as copper. The high-toughness polyethylene mixed material for producing the electrolytic cathode plate insulating sealing strip comprises the following components in part by weight: 100 parts of polyethylene resin, 0.1 to 20 parts of linear low-density polyethylene resin, 0.1 to 10 parts of functional polymer, 0.1 to 1 part of antioxidant, 0.1 to 5 parts of flowing modifier and a proper amount of colorant. The high-toughness polyethylene mixed material has the characteristics of long service life, high toughness and the like.

The invention discloses high-toughness strengthened steel with nanoparticles. The strengthened steel is characterized by comprising the following substances by weight: 35 to 46 parts of copper, 15 to 32 parts of iron powder, 5 to 17 parts of nodular cast iron powder, 14 to 16 parts of an ethylene-vinyl acetate copolymer, 5 to 7 parts of an acrylic resin, 9 to 17 parts of nano-silver, 10 to 14 parts of alumina, 3 to 4 parts of polyurethane, 11 to 14 parts of nanometer silicon oxide, 3 to 8 parts of aluminum silicate, 12 to 23 parts of sand and 15 to 19 parts of a glass fiber. The strengthened steel provided by the invention has good toughness, a uniform structure and improved strength and toughness and meets requirements on strong toughness.

The invention provides a compound used for an electrolysis cathode plate sealing strip and a preparation method thereof, belonging to the technical field of plastic processing and application and the technical field of wet electrolysis of metals such as copper. The components used for producing the electrolysis cathode plate sealing strip include 100 parts of polyethylene resin, 0.1-20 parts of linear low density polyethylene, 0.1-10 parts of functional polymer, 0.1-1 part of oxidization inhibitor, 0.05-1 part of metal deactivator, 0.1-5 parts of flow modifier and a proper amount of colorant according to weight parts. The compound has the characteristics of long service life, high adhesion strength with a cathode plate and smooth surface of the molded sealing strip.

The invention discloses a PC composite material and a preparation method and application thereof. The PC composite material comprises the following components in parts by weight: 100 parts of polycarbonate; 1 to 5 parts of polyethylene-butyl acrylate grafted glycidyl acrylate; 2-6 parts of a toughening agent; the flexibilizer is selected from any one or more of core-shell structure polymers which take methyl methacrylate or polystyrene acrylonitrile as a shell and take acrylate or acrylate grafted organic silicon as a core. The polyethylene-butyl acrylate grafted glycidyl acrylate is added into the polycarbonate material, and meanwhile, the core-shell structure toughening agent with specific components is added, so that the bonding performance of the material and cloth can be remarkably improved, and meanwhile, good toughness is kept; the direct bonding of the material and the cloth is realized, and the bonding strength is high. The application range of the polycarbonate material is further widened, and the polycarbonate material can be used for preparing fabric electronic products such as fabric mobile phone shells and fabric loudspeaker box shells.

The invention discloses a ball carrying plate for a steel ball strengthening machine. The ball carrying plate comprises, by weight, 10-20 parts of nylon, 30-40 parts of ferrite, 6-10 parts of gypsum, 0.5-0.9 part of chromic oxide and 3-7 parts of titanium dioxide. The ball carrying plate has the beneficial effects that according to the obtained composite material type ball carrying plate, the ferrite is used as a base body which is covered with the gypsum, the nylon and other materials layer by layer, the rigidity requirement for the ball carrying plate can be met, and enough kinetic energy can be provided for steel balls; besides, the toughness requirement for the ball carrying plate can be met, and the working service life of the ball carrying plate is prolonged; the surface of the ball carrying plate is coated with a trace amount of chromic oxide and titanium dioxide so that the abrasion resistance and the corrosion resistance of the ball carrying plate can be improved, and the reliability of the ball carrying plate is further improved.

The invention discloses a protective plastic plate and a production method thereof, and belongs to the technical field of plastic plates. The protective plastic plate can deform in a normal state by embedding a protective bag in a plastic plate body, the influence on the original toughness of the plastic plate body can be almost negligible, after the plastic plate body is violently impacted, phase change fluid in the protective bag becomes hard from soft and absorbs and digests external impact, so that an embedded protective layer is formed and returns to the initial soft and elastic flowing state after external force disappears, embedded pre-falling-off columns are used for assisting the protective bag in bulging towards the center, the protection performance is further improved, and the embedded pre-falling-off columns are reserved in the protective bag to assist in improving the strength in the normal state. Compared with the mode that a steel wire mesh is directly embedded in the prior art, the rigidity and the toughness can be improved at the same time.

The invention discloses high-toughness reinforced steel which comprises the following substances in parts by weight: 22-31 parts of silicon oxide, 45-60 parts of nickel oxide, 11-14 parts of fiber brucite, 11-17 parts of molybdenum, 3-6 parts of hafnium, 9-13 parts of aluminum silicate, 10-25 parts of copper, 10-17 parts of polyurethane, 5-6 parts of nodular cast iron powder, 12-23 parts of sand, 5-14 parts of aluminum oxide and 41-50 parts of glass fiber. The high-toughness reinforced steel is relatively good in toughness and uniform in texture, and both the strength and the toughness are improved and can meet the requirement of high toughness.