54results about How to "High hardness and strength" patented technology

The invention provides an inorganic foaming filling and reinforcing composition for a coal mine as well as a using method and application thereof. The inorganic foaming filling and reinforcing composition for the coal mine can be used as a novel safe plugging and reinforcing material, is especially suitable for plugging and reinforcing of the coal mine, and is the best water-proof, fire-proof, gas-proof, collapse-proof and accident-proof material.

A process for manufacturing connecting rods is provided which comprises the steps of compacting, sintering, and powder forging a powder metal comprising a carbon source and a prealloyed powder consisting essentially of iron and copper. The connecting rods made from this process have sufficient hardness and strength to be used in an engine and do not require any additional quenching or tempering.

The invention discloses a good-liquidity harmful-gas-free environmentally-friendly hot melt adhesive which is prepared from the following raw materials in parts by weight: 35-45 parts of EVA, 1-2 parts of dodecyl trimethyl ammonium chloride, 10-15 parts of nano fly ash, 10-20 parts of kieselguhr, 1-3 parts of tetraethylenepentamine, 4-8 parts of polycarbonate, 5-8 parts of starch, 0.1-0.5 part of benzoyl peroxide, 10-15 parts of octyl-phenolic curing resin, 1-2 parts of an anti-aging agent NBC, 1-2 parts of sodium polyacrylate, 10-18 parts of silicone rubber, 3-9 parts of phenolic resin and 10-20 parts of modified tackifying resin. According to the invention, resin and additives are reasonably compounded, so that the hot melt adhesive is good in liquidity, and high in softness and viscidity; through intercalated modifying, the mechanical property of rubber can be improved, thermal deformation temperature is increased, and water absorption is low, and thus when the rubber is used for preparing the hot melt adhesive, compatibility of all raw materials of the hot melt adhesive can be increased and viscosity and water resistance are improved.

The invention discloses a hollow bolt machining process. The hollow bolt machining process comprises the following steps of (1), preparing raw material; (2), cold drawing; (3), cold heading; (4), automatic drilling; (5), cleaning; (6) thread rolling; and (7), heat treatment (tempering). The machining process has the advantages that surface smoothness of material is good, the automatic machining production efficiency is high, the strength of a thread rolling surface is good, and the strength of a finished product is high. Meanwhile, the hollow bolt comprises a screw cap and a screw rod, one side of the screw cap is provided with a round concave surface, a screw rod is integrally arranged at the center of the other side of the screw cap, a threaded part is arranged at one end of the screw rod, three round holes are annularly arrayed on the side, close to the screw cap, of the screw rod, and an inner hole is formed in one side of the screw rod. The hollow bolt has the advantages of beinggood in using effect and good in oil passing effect.

The invention discloses a high-wear-resistance anti-skid pavement aggregate, a pavement and a preparation method. The high-wear-resistance anti-skid pavement aggregate is obtained by taking a waste refractory material as a raw material and carrying out sorting, crushing, screening, soaking and strengthening treatment on the waste refractory material, and the waste refractory material comprises a waste high-alumina refractory material and a waste silicon mullite brick. Main phases in the waste high-alumina refractory material are corundum, mullite and quartz, wherein the mass percentage of Al2O3 is greater than or equal to 60%; main phases in the waste silicon mullite brick are corundum, mullite, silicon carbide and quartz, wherein the mass percentage of Al2O3 is greater than or equal to 55%. The waste is high in alumina content, high in hardness and strength and good in wear resistance, and compared with a process of treating the waste to prepare a refractory material, the process is simple and low in cost.

The invention discloses a high-hardness pneumatic vehicle high-pressure steel cylinder production process. The production process comprises such steps as material selection, annealing, polishing, deep drawing, opening closing, cleaning and painting; the first time of cold drawing is performed for the polished blank; the annealing step is performed after the first time of cold drawing; then, the second time of cold drawing is performed; after the second time of cold drawing, the third time of thermal drawing shape correction is performed for the blank; and the pressure keeping treatment is performed in the third time of thermal drawing shape correction. The overall quality of steel cylinders is guaranteed by multiple times of drawing and annealing treatments.

The invention provides an isotonic contraction forcing device which comprises a supporting component and a fixing device. The supporting component is composed of a connecting component, a sleeve, a pushing spring and an inner rod, the pushing spring is arranged inside the sleeve, the inner rod is nested into the sleeve, the pushing spring arranged in the sleeve has the elastic supporting effect on the inner rod, the supporting component is fixed on the outer side of the sleeve, and the fixing device is connected with the inner rod of the supporting component; the isotonic contraction forcing device is small in size, simple in structure, wide in application range and capable of being applied to tissues and organs such as skin, skeletal muscles and smooth muscles, isotonic contraction of the tissues and the organs is achieved through ingenious design, and applicable tools are provided for controllable growth of the tissues and the organs such as the skin, the skeletal muscles and the smooth muscles.

The invention discloses environment-friendly paint for a chemical pump housing. The environment-friendly paint is prepared from the following components: waterborne acrylic emulsion, abietate, polyvinyl alcohol, pentaerythritol, carboxymethylcellulose, propanediol, talcum powder, pigments, aluminum silicate fibers, corn stalk powder, lauryl sodium sulfate, inositol hexaphosphate, nano particles, lauroyl diethanolamide, rhus verniciflua folium alcohol extract and deionized water. The chemical pump housing paint prepared by the invention is nontoxic and environmentally friendly; after being smeared on the surface of a capacitor housing, a paint film is high in hardness and strength, good in wear resistance, weather resistance and aging resistance and high in toughness and flexibility.

The invention relates to a preparation method of ferrite-twin-crystal martensite low-carbon steel. The method mainly comprises the following steps that common low-carbon steel with the carbon contentof 0.13% or 0.20% is adopted, quenching is carried out to obtain low-carbon martensite, 75% rolling deformation at the room temperature is carried out, then deformation is carried out at the temperature of 700 DEG C or 710 DEG C for recrystallization, elastic stress of 210 MPa or 220 MPa is applied at the same temperature, ageing is for 40 minutes so as to obtain the ferrite-twin-crystal martensite low-carbon steel ferrite, wherein ferrite is ultrafine isometric crystal, and the grain size of the twin-crystal martensite is about 2 micrometers. The twin-crystal martensite low-carbon steel. According to the prepared ultrafine isometric crystal ferrite + twin-crystal martensite low-carbon steel, the hardness strength is higher than that in the normalizing state, the toughness plasticity is higher than that in the quenching state, the comprehensive mechanical property is greatly improved, the hardness of the low-carbon steel reaches 1.8 times that in the annealing state, and the elongationrate is 2.1 times that in the quenching state.

The invention discloses corrosion-resisting tensile type alloy steel, and relates to the technical field of metal smelting. The corrosion-resisting tensile type alloy steel comprises the chemical compositions of, by mass, 0.22-0.31% of C, 4.36-5.24% of Cr, 0.71-0.74% of Al, 0.33-0.46% of Zn, 0.41-0.58% of Cu, 0.45-0.49% of Ti, 0.11-0.19% of Si, 0.12-0.15% of W, 0.12-0.14% of Nb, 0.14-0.17% of Mn,and the balance Fe and unavoidable impurities. The invention further discloses a preparation method of the corrosion-resisting tensile type alloy steel. The hardness and tensile strength of the alloysteel can be improved, meanwhile, the corrosion resisting property of the alloy steel can further be improved, and the service life of the alloy steel is effectively prolonged.

The invention discloses a hard alloy tapper which comprises a head part and a handle part connected with the head part, wherein a sawtooth-shaped hard alloy blade is arranged at an end of the head part; one side of the sawtooth-shaped hard alloy blade is in a straight form; two peaks extend to the bottom of the sawtooth on the other side of the sawtooth-shaped hard alloy blade; a chip outlet is formed in the head part. The hard alloy tapper has the advantages that the blade and the tooth edge are difficult to be abraded and the service life is longer.

The invention discloses a preparation method of a ceramic grinding body for gypsum grinding. The preparation method comprises the following steps of a, selecting the powder, using BaO (barium oxide),TiC (titanium carbide), Mo2C (molybdenum carbide), ZrO2 (zirconium dioxide), Cr2C3 (Chromium carbide) and TaC (tantalum carbide) as the raw materials, preparing acetic acid with concentration of 80% to 90% as a solvent, pouring into the raw materials, mixing with the raw materials, fully impregnating for 3 to 6h, mixing, and controlling the time within 0.5h, so as to obtain a grinding medium; b, drying the raw materials in step a, mixing with coke, selecting spheres, and fully grinding, wherein the ratio of spheres to material is 3:5, the rotation speed of sphere grinding is 300 to 450rpm, andthe duration of sphere grinding is 30 to 48h; c, screening the mixture after sphere grinding, wherein the sieve hole is 50 to 150 meshes; d, putting the screened mixture into a die, and pressing intothe blank at the pressure of 350 to 550MPa; e, heating the fetched blank, cooling the heated and formed blank, cutting after cooling, grinding and polishing. The prepared grinding body has higher hardness and longer service life.

The invention discloses to an inner container coating for a lightweight submersible pump, and relates to the technical field of production and processing of pumps. The coating comprises acrylic resin, isocyanate, lithopone, polyamide, aluminum nitrate, magnesium chloride, carbon fiber powder, triethanolamine, rosin, cyclohexanol, polyethylene wax, toluene, EVA resin, calcium bentonite, silica powder, calamine powder, wood glue powder, deionized water, an antirust agent, a composite reinforcing agent, an antifoaming agent and a thickener. The antirust agent and the composite reinforcing agent are used to modify a coating in order to increase the antirust property and the hardness of the coating, and antirust powder-containing components in the antirust agent added to the coating can help the coating to form a film on an inner container in order to improve the antirust ability of the inner container, so the pump body of the water pump is protected, the resistance of the submersible pump to low-oxygen humid environment is effectively improved, and the service life of the submersible pump is prolonged.

The invention discloses a soft hot melt adhesive containing rosin. The hot melt adhesive is prepared from the following raw materials in parts by weight: 45-50 parts of EVA, 10-20 parts of modified tackifying resin, 1-2 parts of dodecyl trimethyl ammonium chloride, 40-55 parts of hydrotalcite powder, 1-2 parts of an antioxidant RD, 1-5 parts of dimethyl aminopropyl amine, 3-5 parts of polypropylene adipate, 5-10 parts of diatomite, 10-13 parts of rosin, 20-30 parts of alkyl phenolic resin, 1-2 parts of methyl methacrylate and 1-2 parts of n-octyl acrylate. The hot melt adhesive contains intercalated modified rosin, so that the mechanical property of rosin can be improved, the thermal deformation temperature can be increased, and the water absorptivity is low; when the intercalated modified rosin is utilized for preparation of the hot melt adhesive, the compatibility of all the raw materials can be improved, the viscosity and water resistance of the hot melt adhesive can be improved, and thus the prepared hot melt adhesive can be soft.

The invention provides an isometric contraction force-applying device which comprises a supporting component and a fixing device. The supporting component is composed of a connecting component, a sleeve and an inner rod. The inner rod is embedded inside the sleeve. The connecting component is fixed to the outer side of the sleeve. The fixing device is connected with the inner rod of the supporting component. The isometric contraction force-applying device is small in size, simple in structure and wide in application range; due to the ingenious design of the sleeve, the isometric contraction force-applying device can be applied to all tissue and organs such as skin, skeletal muscles and smooth muscles; isometric contraction of the tissue and organs is achieved through the ingenious design, and an applicable tool is provided for controlled growth of all the tissue and organs such as the skin, the skeletal muscles and the smooth muscles.

The invention discloses heat-resistant styrene resin-containing hot melt glue. The hot melt glue is prepared from the following raw materials in parts by weight: 65-70 parts of EVA, 10-20 parts of modified tackifying resin, 1-3 parts of cetyl trimethyl ammonium bromide, 5-10 parts of styrene resin, 10-15 parts of xylene formaldehyde resin, 1.3-1.5 parts of a crosslinking agent TAC, 15-20 parts of neoprene, 1-2 parts of paraffin oil, 0.5-0.8 part of sodium carboxymethylcellulose, 2-5 parts of epoxidized soybean oil, 25-30 parts of nano potassium feldspar powder, 1.3-1.9 parts of casein and 1.5-1.9 parts of citric acid. According to the heat-resistant styrene resin-containing hot melt glue, the heat resistance of the hot melt glue can be improved through the usage of nano potassium feldspar powder and casein; styrene resin and neoprene are subjected to intercalation modification, so that the mechanical property of the resin can be improved, the heat deflection temperature is increased, the water-absorbing property is low, and when the resin subjected to intercalation modification is used to prepare the hot melt glue, the compatibility among the raw materials of the hot melt glue is strengthened, and the viscosity, heat resistance and waterpfoofness of the hot melt glue are improved.

The invention discloses a high-hardness Cu-based material containing interface layers and a preparation method thereof. The material comprises Cu matrix layers and the interface layers, wherein the Cumatrix layers and the interface layers are alternately superposed; an initial layer and a final layer are Cu layers; the interlayer modulation ratio is 10:1-50:1; the interface layers are Nd, Zr, Ag,CuZr amorphous and CuNb amorphous; the thicknesses of the Cu layers are the same; the thickness range of the single Cu layer is 5-50 nm; the thicknesses of the interface layers are the same; and thethickness range of the single interface layer is 0.5-2 nm. The prepared high-hardness Cu-based material has such mechanical properties as higher hardness; and the interface layers generate no side effect on the matrix Cu. The preparation method of the Cu-based material is simple in production process, low in cost and suitable for industrial application and automatic batch production, and has unique structure and performance advantages in such fields as microelectronic components, power transmission devices, integrated circuits and printed circuits.