55results about How to "Excellent high strength" patented technology

The present invention discloses one kind of heat resistant anticorrosive composite polyphenylene sulfide epoxy paint and its preparation process. The anticorrosive paint consists of primer, finishing paint and intercoat paint. The primer consists of polyphenylene sulfide, epoxy resin, glass scale and cyanamide dimmer. The finishing paint consists of polyphenylene sulfide, epoxy resin, silicon carbide, 4, 4'-diamino diphenyl sulphone and cyanamide dimmer. The intercoat paint consists of polyphenylene sulfide, epoxy resin, silicon carbide, glass scale, dihydrazide sebacate and 4, 4'-diamino diphenyl sulphone. The anticorrosive paint produces no sag, and can form homogeneous and smooth coating with excellent physical and chemical performance, high heat resistance, high corrosion resistance, high impact strength, and high insulating performance.

The invention discloses a submerged arc composite welding method of a bridge steel thick plate with the tensile strength greater than or equal to 810MPa. The submerged arc composite welding method comprises the steps that according to the mechanical properties of a substrate, ReL is greater than or equal to 690 MPa, Rm is greater than or equal to 810MPa, A is greater than or equal to 14%, and -40DEG C KV2 ballistic work is greater than or equal to 120J; 32mm and 50mm equal thickness bridge steel welding is performed; a groove is a double-sided V-shaped symmetrical groove, the angle of the groove is 60 degrees, and the truncated edge is 1mm; welding wires comprising a welding wire for submerged-arc welding and a gas-shielded welding wire are selected; and welding process is performed, specifically, gas shielded arc welding backing is firstly performed, and then capping is subjected to submerged-arc welding. According to joint performance, Rm of a weld joint is greater than or equal to810MPa, the joint cold bending d is 3a, the qualified angle is 180 degrees, the weld joint ballistic work -40 DEG C KV2 is greater than or equal to 100J, fusion line ballistic work -40 DEG C KV2 is greater than or equal to 106J, heat affected zone (1mm) -40 DEG C KV2 is greater than or equal to 160J, the average impact work of weld joint three areas is much higher than a standard value, the corrosion resistance index I value of the weld joint is greater than or equal to 8.78. The weld joint three areas have high impact toughness reserve and safety margin.

The invention belongs to the field of special engineering plastics and particularly discloses a polyether-ether ketone composite material. The polyether-ether ketone composite material is characterized by comprising the materials of polyether-ether ketone fine powder, polyether-ether ketone coarse powder, carbon fiber, graphite, polytetrafluoroethylene and a dispersing agent, wherein the mass ratio of the dispersing agent, the carbon fiber, the polytetrafluoroethylene, the graphite, the polyether-ether ketone fine powder to the polyether-ether ketone coarse powder is 1:(11-13):(9-10):(6-8):(7-9):(60-65). The polyether-ether ketone composite material adopts the polyether-ether ketone as a base material, is compounded with a highly-wear-resistant material (carbon fiber), a high-lubricity material (graphite) and a wear-reducing material (polytetrafluoroethylene), comprises the polyether-ether ketone fine powder and the polyether-ether ketone coarse powder and is added with the dispersing agent, so that the fluidity of a product is effectively improved, the stability of the product is improved, the properties of high strength and high wear resistance and the like of the product are further optimized; and the temperature can reach more than 300 DEG C after long-time use, and the melting point is about 356 DEG C, so that the application field of the material is expanded.

The invention discloses a concrete slope protection building block with drainage and greening functions and a construction method thereof. The concrete slope protection building block comprises a building block body, a vegetation growth through groove is formed in the middle of the building block body, third drainage grooves are formed in the periphery of the vegetation growth through groove, twoT-shaped mortises and two T-shaped tenons are arranged on the four side faces of the building block body in total, at least one T-shaped mortise or one T-shaped tenon is arranged on each side face, and a second drainage groove and a first drainage groove which are communicated with the third drainage grooves are sequentially formed in the middle of the surface of each T-shaped mortise and the middle of the surface of each T-shaped tenon. The construction method comprises the following steps of excavating or filling a side slope; slope surface cleaning; paving a gravel cushion layer; paving concrete slope protection building blocks; planting green vegetation; and building a drainage facility connected between the slope bottom concrete blocks and the side ditches. The concrete block has theadvantages of being good in fastening degree, high in adaptability, capable of allowing differential settlement or frost heaving deformation of a slope foundation within a certain range, free of instability damage, small in structural material consumption, attractive, economical and the like.

The invention belongs to the field of mechanical conveying of corrosive liquid chemicals, and particularly relates to an anti-corrosion nested type gear and a gear pump filling machine. The anti-corrosion nested type gear comprises an inner tooth ring and an outer tooth ring, wherein the outer tooth ring is nested at the outer part of the inner tooth ring; an axial hole is formed in the center of the inner tooth ring; multiple first tooth threads are arranged on the outer circumferential surface of the outer tooth ring; the outer tooth ring is made of anti-corrosion plastic. The anti-corrosion nested type gear disclosed by the invention has the beneficial effects that not only can a gear be simply and efficiently disassembled, assembled and replaced, but also a working environment for conveying the corrosive liquid chemicals by the gear pump filling machine can be well adapted, and meanwhile, the service life of the gear is prolonged.

The invention discloses a preparation method of a heat-dissipation coating for a led streetlamp. The preparation method comprises the following steps: mixing carboxyl carbon nano tubes with hydroxylating diatomite at first; modifying the mixture by using thionyl chloride and triethylamine; adding 4-vinylbenzyl chloride and triethanolamine borate in the mixture to obtain amidated esterification monomers; polymerizing the monomers in amphenicol dispersion liquid to obtain polymer which has good heat dissipation property, corrosion resistance and high strength. The heat dissipation property is good due to the fact that the diatomite has abundant micro-pore structures, the triethanolamine borate has good corrosion resistance, by the carbon nano tubes, strength and toughness of the polymer are enhanced, plant ash is further added in the polymer, and therefore, the heat dissipation effect of the finished coating is further improved.

The invention discloses a near-beta type titanium alloy with good matching of strength and plasticity and a preparation method thereof, and belongs to the field of titanium alloys. According to the preparation method, medium-sized crystal grains in the sintered alloy are crushed and refined after upsetting, drawing and cogging in a single-phase region. Then a rolled bar is subjected to one-step quasi-beta bar rolling at a phase transformation point by utilizing a relatively high phase transformation point caused by high oxygen content of the alloy, crystal grains are crushed again, and a coordinated structure of non-uniform crystal grains and a multi-stage layered second phase is realized by virtue of dynamic precipitation and partial recrystallization of the second phase under the actionof thermal coupling. Non-uniform mixed crystals comprise ultrafine beta crystal grains and coarse beta crystal grains, and the multi-stage layered second phase comprises a layered primary alpha phase,a strip-shaped grain boundary alpha phase and a beta transformation structure. After short-time heat treatment, the non-uniform mixed crystal structure is reserved, the multi-stage layered second phase is increased from ternary to quaternary through the separated fine-needle-shaped alpha phase, and the alloy maintains good plasticity while having high strength.

The invention discloses a heavy-duty anti-skid lane paint. In the prior art, the most of the lane paint has the following advantages that the materials in the formula have significant odor and toxicity, the construction process is complex, and the construction time is long. The purpose of the present invention is to solve the advantages in the prior art. The technical scheme is that the heavy-duty anti-skid lane paint comprises components A, B and C, wherein the component A comprises 0.5-1.5% of a dispersant, 0.5-1.5% of a wetting agent, 0.5-1.5% of a defoamer, 0.5-1.5% of a thickening agent, 0.5-1.5% of a leveling agent, 20-37% of deionized water, 50-70% of a curing agent, 6-12% of pigment paste, and 2-5% of a water reducing agent, the component B comprises an aqueous acrylic amino resin, and the component C comprises 10-15% of white cement, 12-25% of barium sulfate, 6-13% of titanium dioxide, 13-20% of quartz powder, and 27-59% of large color particles. According to the present invention, the heavy-duty anti-skid lane paint with characteristics of environmental protection, no toxicity, spray molding in one time and construction time saving is prepared.

The invention relates to the technical field of copper alloy powder metallurgy and non-ferrous metal processing, in particular to a composite bar and a preparation method and application thereof. Thecomposite bar comprises a core part and a jacket; the core part is made of oxygen-free copper; and the jacket is made of aluminum oxide dispersion strengthened copper alloys. According to the composite bar, the excellent characteristics of high strength, high conductivity, high-temperature softening resistance and the like of the aluminum oxide dispersion strengthened copper alloys and the good brazing performance of the oxygen-free copper are organically combined to form advantage complementation, so that the composite bar has the excellent characteristics of high strength, high conductivity,high-temperature softening resistance and the like and the good brazing performance at the same time.

The invention relates to a granulator which is fixed to a base. The granulator comprises a to-be-granulated bin, a feeding device, a press device, a main motor and a distributing motor; the lower end of the to-be-granulated bin is connected with a feeding opening of the feeding device through a movable connecting mechanism; a discharging opening of the feeding device is in soft connection with a feeding opening of the press device; the main motor is connected with the press device through an elastic coupler; and the distributing motor is arranged on the side wall of the press device. The granulator is high in yield, high in granule molding rate, good in strength and basically free of cracks and powder.

The invention discloses a lightweight environment-friendly smokeless thermal insulation material for household appliances, and relates to the technical field of thermal insulation materials. The lightweight environment-friendly smokeless thermal insulation material comprises a base material layer and a thermal insulation layer, wherein an anti-corrosion cloth layer is fixed on the upper side of the base material layer, a flame retardant layer is fixed on the upper side of the anti-corrosion cloth layer, reinforcing nets are fixed above the flame retardant layer, sound insulation layers are arranged among the reinforcing nets, and the thermal insulation layer is fixed above the reinforcing nets. The light environment-friendly smokeless thermal insulation material for household appliances is formed by pressing the carbon fiber base layer, a composite polyester fiber layer, a composite flame-retardant fiber layer, a glass fiber gridding cloth foam cotton layer and a glass cotton layer; the carbon fiber base layer is light in weight and can resist high temperature; the composite polyester fiber layer is good in elasticity and has a certain corrosion-resistant effect; thermoplastic resin is added in a preparation process, so corrosion-resistant performance is further enhanced; the composite flame-retardant fiber layer is prepared in a blended mode and has flame-retardant and heat-insulating performance; and glass fiber gridding cloth has the advantages of being high in strength and light in weight.