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

The invention provides a preparation method of a high-corrosion-resistance high-aluminum-content low-density medium-thickness plate for an ocean platform. Steel, comprises, by weight, 0.010%-0,035% ofC, 4.01%-6.00% of Al, 0.010%-0.20% of Mn, 1.00%-3.00% of Ni, 0.010%-0.30% of Si, 0.008%-0.020% of Nb, 0.10%-0.80% of Mo, 0.00%-0.050% of Ce, less than or equal to 0.015% of P, and less than or equalto 0.005% of S, and other Fe and impurities. Components and tissue are controlled, so that the corrosion resistance of the steel in the marine atmospheric environment can be higher 50% or above than that of common alloy steel Corten-A, and the density is reduced by 6% or above.

The invention provides a polyethylene mixing material for a high-cohesive-force electrolytic cathode plate sealing strip and a preparation method thereof, which belong to the technical field of plastic processing and application and the technical field of wet electrolysis of metal including copper and the like. The polyethylene mixing material for producing the electrolytic cathode plate sealing strip comprises, by weight: 100 parts of polyethylene resin, 0.1-20 parts of linear low-density polyethylene resin, 0.1-10 parts of functional polymers, 0.1-1 part of antioxygen, 0.05-1 part of metal deactivator and appropriate parts of colorants. The mixing material has the advantages of being long in service life, high in cohesive strength with a cathode plate and the like.

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 to form 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 discloses a protective plastic board and a production method thereof, which belong to the technical field of plastic boards. The invention can embed a protective bag in the plastic board, which can be deformed under normal conditions, and the plastic board body is not damaged. The impact of the original toughness is almost negligible, but after a severe impact, the phase change fluid inside the protective bag changes from soft to hard, absorbing and digesting the external impact, thus forming an embedded protective layer, which will recover after the external force disappears to its initial soft elastic flow state, and use the built-in pre-shedding column to assist the protective bag to bulge toward the center, further improving the protection, and reserve it in the protective bag to assist in improving the strength under normal conditions, which is different from the existing technology Compared with the method of directly embedding steel wire mesh, the present invention can simultaneously improve rigidity 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 present invention relates to a vinyl benzyl ether modified poly(p-hydroxystyryl-styrene) polymer resin composition, comprising: (1) a vinyl benzyl ether modified poly(p-hydroxystyryl-styrene) polymer resin; (2) an olefin resin in which the weight ratio of butadiene having a 1,2-addition in the molecular structure is not less than 20%. The present invention also relates to a prepreg comprising the resin composition and an application thereof in a high frequency circuit board; a substrate prepared by using the resin composition has a low dielectric constant, low dielectric loss, a low thermal expansion coefficient and like comprehensive properties, and the area of a "+"-shaped drop mark formed on the substrate under a falling weight impact load is small, while the substrate has good toughness, and may satisfy the requirements for toughness of a copper-clad board.

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 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.