49results about How to "Good plasticity" patented technology

The invention discloses a steel for enamel, and is characterized by comprising the following chemical elements by mass: not more than 0.020% of C, not more than 0.05% of Si, 0.10-0.50% of Mn, not more than 0.03% of P, 0.003-0.050% of S, 0.001-0.03% of Al, 0.001-0.015% of N, 0.005-0.050% of O, not more than 0.005% of Ca, not more than 0.005% of Mg, not more than 0.10% of Cu, not more than 0.10% of Cr, not more than 0.10% of Ni, not more than 0.10% of Mo, at least one of 0.0005-0.003% of B, not more than 0.01% of Nb, not more than 0.02% of V, and 0.001-0.05% of Ti, and the balance of Fe and other inevitable impurities, wherein N(%)*Ti(%) is not more than 3*10<-4>. Correspondingly, the invention further discloses a production method of the steel for enamel. The steel for enamel has excellent comprehensive performance.

The invention relates to high-strength steel for 750 to 880 MPa-level vehicles and a production method thereof. The high-strength steel comprises the following chemical ingredients in percentage by weight: 0.07 to 0.09 percent of C, 0.15 to 0.25 percent of Si, 1.4 to 1.9 percent of Mn, 0.04 to 0.06 percent of Nb, 0 to 0.15 percent of Mo, 0 to 0.04 percent of V, 0.07 to 0.14 percent of Ti, 0.01 to 0.06 percent of Al, less than or equal to 0.02 percent of P, less than or equal to 0.01 percent of S, less than or equal to 0.008 percent of N and the balance of Fe and inevitable impurities. The production method comprises the following steps of: smelting; casting to form a casting blank; heating to the temperature of between 1,180 and 1,250 DEG C; performing final rolling at the temperature of between 820 and 850 DEG C; performing final cooling at the temperature of between 560 and 600 DEG C; and after a steel coil rolls off a production line, cooling slowly. By the production method, the strength of the material is between 750 and 880 MPa, and the steel has high low-temperature impact toughness and cold forming performance.

The invention relates to a watercraft texture wallpaper paint, characterized in that the invention comprises the following components: 31 percent to 35 percent of styrene-acrylic emulsion, 23.94 percent of superfine weight calcium, 1 percent to 2 percent of nano-titanium dioxide, 10 percent to 18 percent of titanium pigment, 8 percent to 9.8 percent of calcined kaolin, 1.2 percent to 1.8 percent of ethylene glycol, 0.2 percent to 0.5 percent of hydroxyethylcellulose, 0.8 percent to 1.5 percent of film forming additive, 0.15 percent to 0.25 percent of multi-functional additive, 0.3 percent to 0.5 percent of dispersant, 0.1 percent to 0.2 percent of wetting agent, 0.15 percent to 0.21 percent of defoamer, 0.08 percent of anticorrosion and insecticide, 0.8 percent to 2 percent of thickener and 20 percent to 22 percent of water. The invention is the watercraft texture wallpaper paint, is environment-friendly, has strong elastic tension, has good covering and anti-cracking effect on the fine cracking of wall, and has good scrape resistance performance, greatly enhancing the degree of wall surface protection; meanwhile, the invention still has strong waterproof performance, without color-changing and decortication and mildew and can fully solve the common problems existing in wall decoration.

The invention discloses an insulation rubber for longitudinal water-tight demagnetization cables used for ships and a manufacture method for the insulation rubber, belonging to the field of cables. The raw materials of the rubber are 15 parts of terpolymer EP rubber K21, 5 parts of terpolymer EP rubber 4045M; 0.5-0.6 parts of a vulcanizing agent DCP, 0.2-0.3 parts of a vulcanizing agent TAIC, 0.7-0.9 parts of an antioxidant MB, 0.2-0.3 parts of an antioxidant RD, 1.0-2.0 parts of paraffin oil, 1-2 parts of chlorinated paraffin-52, 0.5-1.0 parts of microcrystalline paraffin, 1.0-2.0 parts of zinc oxide, 0.3-0.5 parts of eleaostearic acid, 8-11 parts of powdered talcum, 1.0-1.5 parts of gas phase method silica, and 7-9 parts?of calcined pottery clay. First, mixing the raw rubbers of the terpolymer EP rubbers K21 and 4045 in an internal mixer; then adding the rest of the raw materials except the vulcanizing agents in sequence and mixing for 14-16 minutes, and after the obtained mixture being mixed uniformly, loading the obtained product on an open mill to make triangular bags eight times, followed by rubber sieving and sheets making. The insulation rubber has the advantages of good insulative and mechanical properties, aging resistance and oil resistance, which can satisfy the usage requirements of the longitudinal water-tight demagnetization cables used for ships.

The invention discloses a method for preparing a diamond-silicon carbide-cobalt disilicide composite interlayer of a diamond coating on a hard alloy and belongs to the technical field of diamond coatings. The method is characterized in that: direct current plasma-assisted hot filament chemical vapor deposition (CVD) technology is adopted, hydrogen, methane and tetramethylsilane are used as reactant gases, the diamond-silicon carbide-cobalt disilicide composite interlayer is deposited on the hard alloy of which the surface is etched for removing cobalt, the composite interlayer is subjected to isothermal treatment in an atmosphere of methane and hydrogen in a volume ratio of 1 percent, and a diamond thin film is deposited on the composite interlayer. The method has the advantages that: the cobalt disilicide generated in the composite interlayer improves the adhesive force between a CVD diamond coating and a hard alloy substrate and the toughness of the CVD diamond coating obviously. The process of the invention is easy to control, can be applied to hard alloy CVD diamond coating tools and parts and large-area CVD diamond coatings and has a promising industrial prospect.

The invention relates to high-performance corrosion-resistant economic composite steel coiled tubing and a manufacturing method thereof. The high-performance corrosion-resistant economic composite steel coiled tubing comprises a base layer and a composite layer, wherein the base layer and the composite layer are in metallurgical bonding; the base layer is a carbon steel layer or a low alloy steel layer; the composite layer is a corrosion-resistant alloy layer; and the composite layer is arranged on the inner surface or the outer surface of the base layer. The high-performance corrosion-resistant economic composite steel coiled tubing is high in strength, good in plasticity and toughness, corrosion resistant in use and good in economy.

The invention belongs to the technical field of metallurgy, and particularly relates to a non hardened and tempered state hot-rolled steel strip with yield strength higher than 900MPa and a preparation method of the hot-rolled steel strip. The non hardened and tempered state hot-rolled steel strip comprises the chemical components in percentage by weight: 0.06-0.12% of C, 0.10-0.30% of Si, 0.80-1.20% of Mn, 0.00-0.04% of Nb, 0.00-0.04% of V, 0.02-0.10% of Ti, 0.8-1.20% of Cr, 0.10-0.30% of Mo, 0.001-0.003% of B, less than 0.012% of P, less than 0.01% of S, and the balance of Fe, and has the yield strength not less than 900MPa, tensile strength not less than 940MPa, and elongation at break not less than 12%. The preparation method comprises the steps of: smelting molten steel according to the set components, casting into cast blank, heating the cast blank, carrying out rough rolling and finish rolling, cooling the steel strip to 200-450 DEG C after finish rolling, coiling, carrying out hot rolling, carrying out offline tempering at the tempering temperature of 400-600 DEG C, and delivering in the hot-rolled state or hot-rolled and offline tempered state. According to hot-rolled steel strip provided by the invention, the hardening and tempering heat treatment process is not needed, so that the production cost is greatly lowered.

The invention provides a high-temperature-resistant high-performance alloyed fastener comprising following ingredients: 0.42% of C, 0.33% of Si, 0.70% of Mn, 0.030% or less of S, 0.030% or less of P, 1.10% of Cr, 0.025% or less of Ni, 0.025% or less of Cu, 0.20% of Mo, 0.24% of V, and 0.03% of Nb. The invention also provides a manufacturing technique used for production of the alloyed fastener. The manufacturing technique of the high-temperature-resistant high-performance alloyed fastener helps to solve a problem that: manufacturing techniques used for production of alloyed fasteners with a level of 12.9 or above have not been invented in domestic at present. The alloyed fastener produced by the manufacturing technique possesses high strength and hardness which are not possessed by common fasteners, and excellent plasticity, toughness, corrosion resistance, tensile strength, fatigue strength and delayed fracture resistance. The alloyed fastener is capable of ensuring that failures such as break and damage are not easy to happen in manufacturing process and using procedures, and can function normally at a highest temperature of 500 DEG C. Service life of the fastener is extremely prolonged.

The present invention relates to a method for controlling the surface quality of the stretching forming coating of high-strength aluminum alloy, and comprises the steps that the stretching formed roughcast is correctly arranged on the stretching forming lathe and the work station; stable and middle stretching forming speed is adopted for the operation; the deformation volume of the pre-stretching forming is controlled within the range of 1 percent to 1.5 percent; the pre-stretching formed roughcast is undertaken the solid-melting processing, and is aged for 20 to 25 hours at the room temperature, and then is performed the second (final) stretching forming. Through the correct installation of the material on the work station and the device, the material stays at the uniform plastic deformation status during the stretching forming process, so that the appearance of the coating is obtained with the minimum extension rate; through the control of the pre-stretching forming deformation volume, the problems such as the large plastic deformation and large material crystal grain are prevented during the solid-melting processing heating process. The problems that the appearance accuracy is poor for large crystal grain appears on the surface or for the less stretching deformation volume are resolved during the stretching forming of the high-strength aluminum alloy coating.

The invention discloses highly-filled degradable plastics. The highly-filled degradable plastics are prepared from, by weight, 25-80 parts of biodegradable materials, 30-75 parts of filler powder and 2-10 parts of auxiliaries. The biodegradable materials comprise any one of poly(butylene succinate), poly(terephthalic acid adipic acid butyleneterephthalate) and polylactic acid. The filler powder comprises any one of wood powder, modified starch, modified calcium carbonate, modified talcum powder, modified fly ash, montmorillonoid and kaolin. The highly-filled degradable plastics are low in cost, easy to degrade, good in plasticity and suitable for being applied to producing and manufacturing of plastic products.

The invention provides a high-strength cold-roll phase-change plastic steel plate with good plasticity and a preparation method thereof. The plastic steel plate comprises the following chemical components: 0.05-0.3% of C, 0.1-0.6% of Si, 0.5-2.0% of Mn, 0.04-0.1% of P, 0.06-0.2% of RE, 0.01-0.03% of N, two or more than two of 0.01-0.5% of V, 0.01-0.5% of Ti and 0.01-0.5% of Nb and the balance of Fe and inevitable impurities. The preparation method comprises the following steps of: (1) smelting and casting blanks; (2) rolling: heating to 1100-1250 DEG C, maintaining the temperature for 2-4 h, starting rolling at 1100 DEG C, finishing rolling at 760-900 DEG C and coiling at 560-700 DEG C, wherein the accumulated rolling reduction for cold rolling is 40-80%; and (3) thermal treatment: isothermally treating at 710-850 DEG C for 0.5-6 min, quickly cooling to 330-500 DEG C with the rate of 10-50 DEG C/s, isothermally treating for 0.5-20 min and cooling to room temperature with the rate of 5-20 DEG C/s. The steel plate also has good weldability, thermal immersion plating property and surface quality.

The invention provides full-process TMCP (thermal mechanical control processing) rolled 55SiCr spring steel and a production method thereof. The full-process TMCP rolled 55SiCr spring steel comprises0.52-0.58% of C, 1.20-1.60% of Si, 0.50-0.80% of Mn, 0.60-0.80% of Cr, less than or equal to 0.10% of Ni, less than or equal to 0.10% of Cu, less than or equal to 0.0020% of Ti, less than or equal to0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.010% of Alt, less than or equal to 10PPm of O, less than or equal to 1.0PPm of H and the balance Fe and inevitable impurities. Compared with the prior art, the full-process TMCP rolled 55SiCr spring steel and the production method have advantages that the surface of a finished product is free of a fully decarburized layer, thetotal decarburized layer depth is smaller than 0.10mm, a metallographic structure is formed by pearlite and a small quantity of ferrite, a surface ultrafine grain layer is avoided, grades of nonmetallic inclusions A, B, C, D and Ds are lower than or equal to 1.0, plasticity and toughness are better than those of common springs, and durability and safety in use are improved.

The invention belongs to the technical field of metallurgy and in particular to a yield strength 1100MPa level engineering machinery non-quenched and tempered hot rolled strip and a preparation method thereof. The chemical components of the yield strength 1100MPa level engineering machinery non-quenched and tempered hot rolled strip comprises, by weight, C 0.06-0.12%, Si 0.10-0.30%, Mn 1.60-2.00%, Nb 0.00-0.04%, V 0.00-0.04%, Ti 0.15-0.20%, Ni 0.4-0.80%, Mo 0.20-0.60%, P<0.012%, S<0.01%, and the balance Fe. The yield strength is greater than or equals to 1100MPa, the tensile strength is greater than or equals to 1180MPa, and percentage elongation after fracture is greater than or equals to 11%. The yield strength 1100MPa level engineering machinery non-quenched and tempered hot rolled strip is designed by adopting low carbon components, and by reasonably adding microalloy elements and controlled rolling and controlled cooling technology, production yield strength is greater than or equals to 1100MPa, the tensile strength is greater than or equals to 1180MPa, and percentage elongation after fracture is not lower than 11%. Simultaneously, structure steel strips is provided with good usability, the metallographic structure is bainite/ martensitic structures which are small in grain, cost capable of being reduced no less than 300 yuan per ton, and great economic benefit can be generated.

The invention discloses a nanometer silicon carbide particle-enhanced nickel-based composite material, and belongs to the technical field of metal-based enhanced materials. The nanometer silicon carbide particle-enhanced nickel-based composite material disclosed by the invention comprises the following raw materials in percentage by weight: 96.5-99wt% of nickel as a metal matrix and 1-3.5wt% of nanometer silicon carbide particles as reinforcement. The nickel metal is enhanced with a proper amount of nanometer silicon carbide particles; corresponding preparation technology parameters are assisted; the obtained nickel-based composite material has excellent high-temperature strength properties and fluoride salt corrosion resistance characteristics, and especially has excellent high-temperature irradiation characteristics; and a new direction is pointed out for research of a reactor core structure component material of a commercial molten salt reactor.

The invention relates to hot working process of a high-strength deformation magnesium alloy. The method comprises selecting appropriate thermal treatment temperature and time, controlling processes of dissolving of compound phases, exsolution, precipitation and the like, on the basis of stability of different compound phases and different characteristics of thermodynamics and kinetics in magnesium alloys, therefore effectively controlling the histological structure of the alloy for making that the magnesium alloy both have excellent plastic property and obtain high strength. According to the invention, a hot working system is formulated according to the character of magnesium alloy compounds and the system having a wide applicability is prone to realize industrialization scale production, is suitable for magnesium-zincium base aging strengthening type magnesium alloy and is especially suitable for ZK system high-strength deformation magnesium alloy with the zincium bigger than or equal to 6.0.

The invention provides a high-strength copper tin alloy contact line for a high-speed electric railway, and in particular relates to a copper tin alloy which comprises the following components in percentage by mass: 0.50 to 0.85 percent of tin, no more than 0.10 percent of impurity and the balance of copper. The invention also provides a manufacturing method for the high-strength copper tin alloy contact line for the high-speed electric railway. Compared with the prior art, the high-strength copper tin alloy contact line of the invention fills in the gaps in China. Because the high-strength copper tin alloy contact line has a series of advantages, such as high strength, high plasticity, small grain size, simple production process, low cost, big batch size and the like, the high-strength copper tin alloy contact line can be applied to the rapid transit railway of which the speed per hour is 250 to 350 km, is expected to get good economic benefit and social benefit, and greatly promotes development of the electric railway industry in China.

The invention discloses a blueberry cinnamon mooncake which comprises cake crust and stuffing. The cake crust of the blueberry cinnamon mooncake comprises, by weight, 120-140 parts of self-raising flour, 40-50 parts of wheat flour, 20-30 parts of oat powder, 30-40 parts of whey protein powder, 15-20 parts of eggs, 10-15 parts of peanut oil, 10-14 parts of osmanthus-scented honey, 70-80 parts of coconut milk, 6-8 parts of stevia rebaudian, 2-3 parts of prepared rehmannia roots, 1-3 parts of sweet potato leaves, 2-3 parts of fructus lycii, 2-3 parts of glossy privet fruit, 1-2 parts of Astragalus membranaceus, 2-3 parts of mottled bamboo roots, and an appropriate amount of grape wine. The stuffing of the blueberry cinnamon mooncake comprises, by weight, 20-40 parts of blueberry, 8-10 parts of mulberry, 10-12 parts of longan aril, 10-15 parts of osmanthus fragrans, 6-8 parts of mango seeds, 8-10 parts of black sesame, 8-12 parts of white sugar, 70-80 parts of purple sweet potato powder and 40-50 parts of defatted milk. Due to the fact that various nutrient substances are added into the cake crust, the cake crust is soft, good in plasticity, easy to shape, free of contraction and deformation, fine and smooth in mouth feel, savoury and mellow in taste, mellow, tasty, refreshing, and oily and bright in color. Due to the fact that the stuffing is mainly prepared from blueberry and osmanthus fragrans, the mooncake has a blueberry taste and a faint scent of osmanthus fragrans and enables people to have a good appetite.

Provided is a preparation method of a low-carbon magnesia carbon brick. The method comprises the following steps that all raw materials of the low-carbon magnesia carbon brick are added and mixed, the raw materials are sequentially subjected to compression molding and baking, and the low-carbon magnesia carbon brick is obtained, wherein the low-carbon magnesia carbon brick is prepared from, by weight, 90-95 parts of magnesite clinker, 3-8 parts of micropowder graphite, 1-2 parts of metal aluminum powder, 2-4 parts of magnalium cementing agent and 1-2 parts of water, and the magnalium cementing agent is prepared through complexing by means of a nanotechnology. According to the low-carbon magnesia carbon brick, phenolic resin is not used, the brick is free of toxin and smell, the magnalium cementing agent prepared through complexing by means of the nanotechnology serves as a binding agent, the problem that high-temperature strength of an organic binding agent is low due to the fact that the organic binding agent is oxidized in the reheating process does not exist, the low-carbon magnesia carbon brick can have high strength in the range from room temperature to molten steel temperature, pollution to the environment is low, the low-carbon magnesia carbon brick has ideal strength and density at normal temperature and high temperature, and meanwhile the low-carbon magnesia carbon brick has good thermal-shock resistance stability performance and slag corrosion resistance performance.

The invention discloses a niobium microalloying copper and copper alloy material, which is characterized by the following: distributing 0.001-0.03% niobium element of even nanometer particle in the copper or copper alloy base; improving welding and softening property without damaging conductivity and heat conductivity.

The invention discloses an organic silicon polymer composite emulsion and a preparation method thereof. The organic silicon polymer composite emulsion is prepared from the following components in parts by weight: 5-500 parts of ethylene vinyl acetate, 90-110 parts of organic silicon and 1-5 parts of a catalyst, wherein the organic silicon is one or more of phenethyl methyl polysiloxane, phenethylmethyl hydrogen-containing polysiloxane, substituted phenethyl methyl polysiloxane or substituted phenethyl methyl hydrogen-containing polysiloxane. The organic silicon polymer composite emulsion disclosed by the invention is a white viscous emulsion, and the organic silicon and the ethylene vinyl acetate form a cross-linked structure or an interpenetrating network structure, so that the originalphenomena of scattering, sand lost and spalling of pervious concrete can be effectively improved, and properties such as compressive strength of the pervious concrete can be increased.

The invention discloses a heat treatment method for improving titanium-nickel-chromium shape memory alloy superelasticity. According to the invention, the titanium-nickel-chromium shape memory alloy is heated for 5-60min under a temperature of 700-800 DEG C, and is heated for 5-30min under a temperature of 350-450 DEG C; and cooling is carried out by using water or oil. With the heat treatment method for improving titanium-nickel-chromium shape memory alloy superelasticity, the titanium-nickel-chromium shape memory alloy is provided with the advantages of high driving force, good plasticity, deformation prevention, good fatigue resistance, large recoverable deformation, and stable performance. The treatment method is simple.

The invention discloses 800MPa-grade steel for ships and a preparation method of the 800MPa-grade steel, and belongs to the technical field of steel and iron materials. The 800MPa-grade steel for ships comprises, by weight, 0.05-0.10% of C, 0.10-0.25% of Si, 0.20-1.0% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.0015% of B, 3.5-5.5% of Ni, 0.3-0.9% of Cr, 0.2-0.7% of Mo and the like. The steel is smelted with a converter; then the steel is heated to 1150-1200 DEG C, and heat preservation is carried out for 2.5-3.5 hours; the steel is rolled in a recrystallization area and a non-recrystallization area; then air cooling is carried out; and finally the steel is subjected to quenching thermal treatment, and the quenching temperature is 880-930 DEG C. The 800MPa-grade steel for ships has the advantages of high strength, good plasticity and excellent crack arresting performance.

The invention discloses a five-element FeCoNiMoSi series high-entropy alloy and a preparing method thereof. The problem that existing structural steel is poor in heat resistance property is solved. The high-entropy alloy is composed of five elements of Fe, Co, Ni, Mo and Si; the atomic percents of Fe, Co and Ni are 25%, the atomic percent of Mo and the atomic percent of Si are 20 to 24% and 1 to 5% correspondingly, the high-entropy alloy is mainly composed of a face-centered cubic phase, a topological close-packed phase Mu and a Leaves phase, and along with increasing of the Si content, the simple cube structural phase is formed. The obtained five-element FeCoNiMoSi series high-entropy alloy has the higher strength and plasticity, and the alloy can serve as a structural material to be applied to the heat resistance field.

The invention relates to a method for strengthening interface bonding of a GNPs/Ti composite by directionally growing TiBw, and belongs to the technical field of composite preparation. The method includes the following steps: adsorbing boron-containing substance nano powder on the surface of GNPs, and then uniformly mixing the boron-containing substance nano powder with titanium-based metal powderto obtain boron-containing substance-coated GNPs/Ti composite powder; sintering the composite powder at a local high temperature to obtain a boron-containing substance-coated GNPs/Ti green body; andcarrying out heat treatment on the green body to obtain the GNPs- (TiBw)/Ti composite. TiBw in in-situ synthesis orientation is connected with and strengthens multiple interfaces of Ti-TiC-GNPs, the effect of threading is achieved, then the interface bonding strength of the GNPs/Ti composite is improved, good plasticity can be kept while the strength is improved, the strong plasticity matching performance of the GNPs/Ti composite is improved, and a new thought is provided for optimizing the mechanical property of the GNPs/Ti composite. The method is easy to operate, short in preparation process and high in universality, and has a good application prospect.

The invention discloses a titanium carbide-tungsten carbide alloy coating. The titanium carbide-tungsten carbide alloy coating comprises a titanium carbide-tungsten carbide mixture serving as a hard phase and further comprises iron and nickel serving as a binding phase, wherein according to the mass percent, titanium carbide accounts for 50-60%, tungsten carbide accounts for 25% and iron accountsfor 2.5-3.8%; and the titanium carbide-tungsten carbide alloy coating further comprises 0.5-1.2% of carbon, 0.8-1.5% of chromium, 1.2-2% of silicon, 0.5-1.5% of aluminum and the balance nickel and inevitable impurities. The invention further discloses a preparation method of the titanium carbide-tungsten carbide alloy coating. In the titanium carbide-tungsten carbide alloy coating, the binding phase and the hard phase have good wettability, and the coating has the advantages of high strength, good plasticity, good abrasion resistance, good corrosion resistance and the like, and has a good machinable property.

The invention discloses a texture coating and a preparation method thereof and aims to solve the problems that the existing texture coatings are produced by using artificial color sand and are bad in weather resistance. The texture coating disclosed by the invention is made from aggregate, emulsion and other auxiliaries. The preparation method comprises the following steps: uniformly mixing cement, lime, gypsum, fine sand, waterborne color paste and biomass adhesive, and granulating to obtain the aggregate; and adding softened water, a thickener and a dispersing agent, uniformly stirring and dispersing in a dispersion machine, sequentially adding the emulsion, a film forming auxiliary, the aggregate, propylene glycol, a defoamer and preservative, uniformly stirring and dispersing to obtain the texture coating. The texture coating is friendly to environment and free of formaldehyde and has the characteristics of fire prevention, damp prevention, sound insulation, high strength, good weather resistance and the like.

The invention discloses austenitic stainless steel as well as a preparation method thereof and application thereof. The austenitic stainless steel is prepared from the following components in percentage by mass: 0.04-0.08% of C, 16.5-20.0% of Cr, 14.5-16.5% of Ni, 1.0-3.0% of Si, 1.5-3.0% of Mn, 0.2-0.5% of Ti, 1.3-2.5% of Mo, 0.003-0.004% of B and the balance of iron. The austenitic stainless steel has a higher room temperature and medium-temperature tensile strength, is excellent in plasticity; alloy strength is improved after medium-temperature ageing treatment, plasticity is not obviouslyreduced, detrimental phase separation-out is avoided, and structure stability is good; and the austenitic stainless steel has excellent lead corrosion resistance and excellent lead-bismuth liquid-state metal corrosion resistance as well as excellent radiation resistance, and can meet material selection needs of lead-base fast reactor key parts better.

The invention discloses a high-efficiency ceramic slurry preparation process. The process comprises the following steps of classifying ceramic slurry raw materials into a hard barren raw material, a semi-barren semi-plastic raw material and a soft plastic raw material, wherein the semi-barren semi-plastic raw materials comprise a ball feeding raw material A and a slurrying raw material B, and thesoft plastic raw materials comprise a ball feeding raw material C and a slurrying raw material D, jointly puting the hard barren raw material, the ball feeding raw material A and the ball feeding rawmaterial C into a ball mill for ball milling, and acquiring ball-milled slurry, jointly puting the slurrying raw material B and the slurrying raw material D into a slurrying pool, adding water, stirring, and acquiring slurrying, and transferring the ball-milled slurry and the slurrying slurry to a mixing tank, and uniformly mixing to obtain mixed slurry. A large amount of ball milling time is saved in the whole preparation process, energy consumption is effectively reduced, and the production efficiency is greatly improved. And in the preparation process, multiple times of detection and debugging are carried out, so that the debugging difficulty of the slurry is reduced, and the slurry with accurate indexes can be obtained more easily.

The invention belongs to the technical field of welding materials, and particularly relates to a flux cored wire for large-current vertical-up welding. The flux cored wire for large-current vertical-up welding comprises a skin and a flux core filled in the skin, wherein the flux core accounts for 14.0-14.5% of the mass percent of the flux-cored wire and comprises the following the components according to the mass percent of the flux-cored wire: 5.0-5.8% of TiO2, 1.4-1.9% of smelting agent, 0.4-0.5% of Si, 1.6-2.0% of Mn, 0.42-0.65% of Mg-Al alloy, 0.14-0.21% of Ti, 0.056-0.08% of B and the balance being Fe. The invention also provides a preparation method of the flux-cored wire. The preparation method comprises the following steps of: sealing the flux core in the skin by a steel belt method through O-shaped abutting joint, molding and reducing the diameter to obtain the flux-cored wire. The flux-cored wire is used for vertical-up welding, and the welding current is 270A-290A. The vertical-up welding current of the flux-cored wire provided by the invention can be as high as 270-290A, and the crown of a welded joint is less than 2.4mm; when the welding current is lower than 270-290A,the good formation of welded joints can be achieved; the ductility of the deposited metal of the flux-cored wire is higher than 26%; and the flux-cored wire has excellent plasticity and can improve the crack resistance of weld metal.

The invention relates to a glass-fiber cement concrete compression strength test mold and a use method. The development of a cement concrete test mold approximately goes through the following severalstages: cast-iron test mold, steel test mold and engineering plastic test mold. The first two kinds of test molds have the advantage of relatively high working strength and the disadvantages of trouble in assembly and disassembly, high price and low cost performance. The glass-fiber cement concrete compression strength test mold comprises a glass-fiber test mold bottom plate (1) and glass-fiber test mold side plates (2), wherein the glass-fiber test mold side plates are arranged above the glass-fiber test mold bottom plate, a demolding hole (3) is formed in the middle position of the glass-fiber test mold bottom plate, and reinforcing rib plates A (4) are arranged at right-angle joints of outer sides of the glass-fiber test mold side plates and adjacent two glass-fiber test mold side plates. The invention is applied to the glass-fiber cement concrete compression strength test mold.