8 results about "Matrix strength" patented technology

A kind of high thermal strength steel, the alloy composition and its mass percentage content are as follows: C 0.85~0.95%, Si 0.8~1.2%, Mn 12.5~15.5%, Cr 4.5~5.5%, Mo 1.7~2.3%, W 1.2~1.8%, V 0.8~1.2%, N 0.08~0.12%, P≤0.010%, S≤0.008%, the balance is Fe and inevitable impurities.The application adds 0.08~0.12% nitrogen in the traditional Fe-Mn-Cr-C austenitic steel system, ensures that the matrix of steel maintains single-phase austenite structure in the range of 20~800 DEG C, guarantees the consistency of material performance;Meanwhile, carbide forming elements such as W, Mo, V are added, which improves the matrix strength.

The invention relates to the technical field of new materials, in particular to an admixture as well as a preparation method and application thereof. The admixture is prepared from the following components in parts by mass: 1.0 to 5.0 parts of a complexing agent, 1.5 to 8.0 parts of a calcium ion compensating agent, 1.0 to 8.0 parts of a crystallization accelerant, 3.0 to 10.0 parts of a slow release agent, 5.0 to 15.0 parts of an active mineral admixture, 15.0 to 28.5 parts of an expanding agent, 20.0 to 40.0 parts of Portland cement and 10.0 to 20.0 parts of quartz sand. The admixture can realize self-repairing of cement-based material cracks in humid and water seepage environments, has the functions of improving matrix strength and waterproof performance, reducing hydration heat, delaying temperature peak appearance and the like, and is wide in application range.

A rubber composite material, raw materials of the material include the following components in parts by weight: hydrogenated nitrile rubber 50-80 parts; nitrile rubber 20-50 parts; spherical filler 30-60 parts; lamellar filler 0.5-5 parts; modifier 1-5 parts; plasticizer 1-10 parts; damping molecule 5-30 parts; antioxidant 2-5 parts; zinc oxide 3-5 parts; stearic acid 1-3 parts; vulcanization accelerator 1-5 parts; sulfur 1-5 parts; peroxide vulcanizing agent 0.5-2 parts. The rubber composite material provided by the application ensures the matrix strength and oil resistance by selecting hydrogenated nitrile rubber with high hydrogenation degree and high acrylonitrile nitrile rubber; the load bearing strength of the rubber composite material is enhanced by introducing the combined system of spherical filler and lamellar filler in the blending system; the damping molecule with polymerization type or high molecular weight can form chemical crosslinking under the action of the vulcanization system between the damping molecule and the matrix, the damping effect of the damping molecule is played, meanwhile, the damping molecule has good anti-high-temperature insulating oil extraction effect, and the service life of the rubber composite material is prolonged.

The application provides a spiral tensile fiber concrete preparation method with high anti-explosion performance, belongs to the field of fiber reinforced concrete, and comprises the following steps: according to the fiber type and mechanical performance parameters, the diameter ratio and wrapping angle of the spiral tensile fiber are predicted based on deep learning, and the spiral tensile fiber is prepared; the spiral tensile fiber is embedded into concrete with different matrix strengths, the negative Poisson's ratio of the spiral tensile fiber is determined after curing, and the concrete matrix strength grade corresponding to the maximum negative Poisson's ratio is recorded; under the concrete matrix strength grade corresponding to the maximum negative Poisson's ratio, a plurality of groups of mixing ratios are generated, the mechanical performance prediction value is obtained based on deep learning according to the spiral tensile fiber characteristic parameters and the mixing ratios, the fitness of the mechanical performance prediction value and the target value is calculated, the matrix mixing ratio is searched based on a genetic algorithm, and the matrix mixing ratio is verified; and the concrete is prepared according to the matrix mixing ratio and the spiral tensile fiber; the preparation system is also provided; and the anti-explosion performance of the concrete is improved.

The application discloses a kind of heat treatment methods of roll for wire bar roughing stand, the diameter of the roll is 300-1000mm, heat treatment method includes the following steps: S1, normalizing: the roll is heated to 820-860 ℃, and the temperature of the whole roll section is uniform, then the roll is cooled to room temperature in air;S2, tempering: the roll after normalizing treatment is heated to 680-720 ℃ again, and then kept for 10-15 hours;S3, cooling: the roll after keeping is cooled using cooling device, first spray+water spray cooling t1 time, then spray cooling t2 time again, improve the quenching cooling intensity of roll, obtain tempering sorbite structure;The application improves the quenching cooling intensity of roll, improves the matrix strength of roll.

This invention relates to a ceramic heating plate, its preparation method, and its application. The preparation method of the ceramic heating plate includes the following steps: (1) molding the raw material powder, and the resulting green body undergoes debinding treatment and first machining to obtain a blank to be welded; (2) welding the sleeve tube to the bottom cover plate, and assembling the resulting sleeve body with the blank to be welded obtained in step (1). During the assembly, heating wires and electrode mesh are placed according to the internal structure of the ceramic heating plate. The assembled sleeve body is then welded to the top cover plate to obtain the sleeve structure; (3) the sleeve structure obtained in step (2) is subjected to degassing treatment, hot isostatic pressing sintering, and post-treatment to obtain the ceramic heating plate. This invention uses molding, sleeve welding, and hot isostatic pressing sintering steps to make the ceramic heating plate have the characteristics of high density, high matrix strength, and tight bonding between the welded blank and the heating wire.

The invention discloses a high-strength and high-toughness pearlite steel wire with a surface-induced multi-scale gradient heterogeneous structure as well as a preparation method and application of the high-strength and high-toughness pearlite steel wire, and belongs to the technical field of pearlite material processing. The invention discloses a high-strength and high-toughness pearlite steel wire with a surface-induced multi-scale gradient heterogeneous structure. The pearlite steel wire has a granular-fibrous-multi-layer rock gradient structure from the edge part to the core part; and the surface of the steel wire is provided with a metal glass-nanocrystalline composite coating which is metallurgically bonded with a matrix and has the thickness of 3-8 microns. The matrix strength is improved through solid solution strengthening; the amorphous / nanocrystalline structure plays a key role in relieving stress concentration and promoting coordinated deformation; and the dispersively distributed particles and fibrous sheet layers further provide the work hardening capability. The Vickers hardness of the aluminum alloy reaches up to 500-520 HV < 0.1 >, the tensile strength of the aluminum alloy is 3060-3080 MPa, and the ductility of the aluminum alloy is 15.0-18.0%.

The invention discloses a toughening particle for interlayer toughening of a composite material and a synthesis method of the toughening particle. The toughening particles are modified thermoplastic resin nylon particles with core-shell structures; in the core-shell structure, the core is thermoplastic resin nylon 6 particles, the shell is a coating formed by in-situ polymerization of polydopamine on the surfaces of the nylon particles, and the coating is formed by interface interaction with groups on the surfaces of the nylon particles. The preparation process is simple and convenient, the obtained toughening particles achieve synergistic improvement of interlayer toughness and matrix strength of a composite material, improve the dispersity of nylon particles in resin, can adapt to various resin matrixes, and solve the problems that a traditional nylon toughening agent is attenuated in strength, prone to agglomeration and narrow in adaptability after toughening, and the toughening effect is good. The low-cost and high-quality production of the composite material is facilitated.